AbstractCharSequenceAssert (AssertJ fluent assertions 3.11.0 API)

java.lang.Object
- org.assertj.core.api.AbstractAssert<SELF,ACTUAL>
- - org.assertj.core.api.AbstractCharSequenceAssert<SELF,ACTUAL>

Type Parameters:

SELF - the "self" type of this assertion class. Please read "Emulating 'self types' using Java Generics to simplify fluent API implementation" for more details.

ACTUAL - the type of the "actual" value.

All Implemented Interfaces:

Assert<SELF,ACTUAL>, Descriptable<SELF>, EnumerableAssert<SELF,Character>, ExtensionPoints<SELF,ACTUAL>

Direct Known Subclasses:

AbstractStringAssert, CharSequenceAssert
```
public abstract class AbstractCharSequenceAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
extends AbstractAssert<SELF,ACTUAL>
implements EnumerableAssert<SELF,Character>
```
Base class for all implementations of assertions for CharSequences.

Author:

Yvonne Wang, David DIDIER, Alex Ruiz, Joel Costigliola, Mikhail Mazursky, Nicolas Francois, Daniel Weber

Field Summary
- Fields inherited from class org.assertj.core.api.AbstractAssert
  actual, info, myself, throwUnsupportedExceptionOnEquals

Constructor Summary

Constructors
Constructor and Description

AbstractCharSequenceAssert(ACTUAL actual, Class<?> selfType)

Constructors
Constructor and Description
`AbstractCharSequenceAssert(ACTUAL actual, Class<?> selfType)`

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`SELF`	`contains(CharSequence... values)` Verifies that the actual `CharSequence` contains all the given values.
`SELF`	`contains(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` contains all the `CharSequence`s of the given Iterable.
`SELF`	`containsIgnoringCase(CharSequence sequence)` Verifies that the actual `CharSequence` contains the given sequence, ignoring case considerations.
`SELF`	`containsOnlyDigits()` Verifies that the actual `CharSequence` contains only digits.
`SELF`	`containsOnlyOnce(CharSequence sequence)` Verifies that the actual `CharSequence` contains the given sequence only once.
`SELF`	`containsOnlyWhitespaces()` Verifies that the actual `CharSequence` consists of one or more whitespace characters (according to `Character.isWhitespace(char)`).
`SELF`	`containsPattern(CharSequence regex)` Verifies that the actual `CharSequence` contains the given regular expression.
`SELF`	`containsPattern(Pattern pattern)` Verifies that the actual `CharSequence` contains the given regular expression pattern.
`SELF`	`containsSequence(CharSequence... values)` Verifies that the actual `CharSequence` contains the given sequence of values in the given order without any other values between them.
`SELF`	`containsSequence(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` contains all the values of the given Iterable in the Iterable iteration order without any other values between them.
`SELF`	`containsSubsequence(CharSequence... values)` Verifies that the actual `CharSequence` contains all the given values in the given order, possibly with other values between them.
`SELF`	`containsSubsequence(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` contains all the values of the given Iterable in the Iterable iteration order (possibly with other values between them).
`SELF`	`containsWhitespaces()` Verifies that the actual `CharSequence` contains one or more whitespace characters (according to `Character.isWhitespace(char)`).
`SELF`	`doesNotContain(CharSequence... values)` Verifies that the actual `CharSequence` does not contain any of the given values.
`SELF`	`doesNotContain(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` does not contain any of the given Iterable.
`SELF`	`doesNotContainAnyWhitespaces()` Verifies that the actual `CharSequence` is either `null`, empty or does not contain any whitespace characters (according to `Character.isWhitespace(char)`).
`SELF`	`doesNotContainOnlyWhitespaces()` Verifies that the actual `CharSequence` is either: `null` empty contains at least one non-whitespace character (according to `Character.isWhitespace(char)`).
`SELF`	`doesNotContainPattern(CharSequence pattern)` Verifies that the actual `CharSequence` does not contain the given regular expression.
`SELF`	`doesNotContainPattern(Pattern pattern)` Verifies that the actual `CharSequence` does not contain the given regular expression.
`SELF`	`doesNotEndWith(CharSequence suffix)` Verifies that the actual `CharSequence` does not end with the given suffix.
`SELF`	`doesNotMatch(CharSequence regex)` Verifies that the actual `CharSequence` does not match the given regular expression.
`SELF`	`doesNotMatch(Pattern pattern)` Verifies that the actual `CharSequence` does not match the given regular expression pattern.
`SELF`	`doesNotStartWith(CharSequence prefix)` Verifies that the actual `CharSequence` does not start with the given prefix.
`SELF`	`endsWith(CharSequence suffix)` Verifies that the actual `CharSequence` ends with the given suffix.
`SELF`	`hasLineCount(int expectedLineCount)` Verifies that the actual `CharSequence` has the expected line count.
`SELF`	`hasSameSizeAs(CharSequence other)` Verifies that the actual `CharSequence` has a length that's the same as the length of the given `CharSequence`.
`SELF`	`hasSameSizeAs(Iterable<?> other)` Verifies that the actual `CharSequence` has a length that's the same as the number of elements in the given Iterable.
`SELF`	`hasSameSizeAs(Object other)` Verifies that the actual `CharSequence` has a length that's the same as the number of elements in the given array.
`SELF`	`hasSize(int expected)` Verifies that the actual `CharSequence` has the expected length using the `length()` method.
`SELF`	`inHexadecimal()` Use hexadecimal object representation instead of standard representation in error messages.
`SELF`	`inUnicode()` Use unicode character representation instead of standard representation in error messages.
`SELF`	`isBlank()` Verifies that the actual `CharSequence` is blank, i.e.
`void`	`isEmpty()` Verifies that the actual `CharSequence` is empty, i.e., it has a length of 0 and is not `null`.
`SELF`	`isEqualToIgnoringCase(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one, ignoring case considerations.
`SELF`	`isEqualToIgnoringNewLines(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one after both strings new lines (\n, \r\n) have been removed.
`SELF`	`isEqualToIgnoringWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one, ignoring whitespace differences
`SELF`	`isEqualToNormalizingNewlines(CharSequence expected)` Verifies that the actual `CharSequence` is equals to another `CharSequence` after normalizing new line characters (i.e.
`SELF`	`isEqualToNormalizingWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one, after the whitespace of both strings has been normalized. To be exact, the following rules are applied: all leading and trailing whitespace of both actual and expected strings are ignored any remaining whitespace, appearing within either string, is collapsed to a single space before comparison
`SELF`	`isJavaBlank()` Deprecated. Use `isBlank()` instead.
`SELF`	`isLowerCase()` Verifies that the actual `CharSequence` is a lowercase `CharSequence` by comparing it to a lowercase `actual` built with `String.toLowerCase()`.
`SELF`	`isNotBlank()` Verifies that the actual `CharSequence` is: not `null` not empty contains at least one non-whitespace character (according to `Character.isWhitespace(char)`)
`SELF`	`isNotEmpty()` Verifies that the actual `CharSequence` is not empty, i.e., is not `null` and has a length of 1 or more.
`SELF`	`isNotEqualToIgnoringCase(CharSequence expected)` Verifies that the actual `CharSequence` is not equal to the given one, ignoring case considerations.
`SELF`	`isNotEqualToIgnoringWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is not equal to the given one, ignoring whitespace differences.
`SELF`	`isNotEqualToNormalizingWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is not equal to the given one, after the whitespace of both strings has been normalized. To be exact, the following rules are applied: all leading and trailing whitespace of both actual and expected strings are ignored any remaining whitespace, appearing within either string, is collapsed to a single space before comparison
`SELF`	`isNotJavaBlank()` Deprecated. Use `isNotBlank()` instead.
`void`	`isNullOrEmpty()` Verifies that the actual `CharSequence` is empty, i.e., it has a length of 0, or is `null`.
`SELF`	`isSubstringOf(CharSequence sequence)` Verifies that the actual `CharSequence` is a substring of the given one (opposite assertion of `contains(CharSequence cs)`.
`SELF`	`isUpperCase()` Verifies that the actual `CharSequence` is a uppercase `CharSequence` by comparing it to an uppercase `actual` built with `String.toUpperCase()`.
`SELF`	`isXmlEqualTo(CharSequence expectedXml)` Verifies that the actual `CharSequence` is equal to the given XML `CharSequence` after both have been formatted the same way.
`SELF`	`isXmlEqualToContentOf(File xmlFile)` Verifies that the actual `CharSequence` is equal to the content of the given file.
`SELF`	`matches(CharSequence regex)` Verifies that the actual `CharSequence` matches the given regular expression.
`SELF`	`matches(Pattern pattern)` Verifies that the actual `CharSequence` matches the given regular expression pattern.
`SELF`	`startsWith(CharSequence prefix)` Verifies that the actual `CharSequence` starts with the given prefix.
`SELF`	`usingComparator(Comparator<? super ACTUAL> customComparator)` Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
`SELF`	`usingComparator(Comparator<? super ACTUAL> customComparator, String customComparatorDescription)` Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
`SELF`	`usingDefaultComparator()` Revert to standard comparison for the incoming assertion checks.
`SELF`	`usingDefaultElementComparator()` Deprecated. Custom element Comparator is not supported for CharSequence comparison.
`SELF`	`usingElementComparator(Comparator<? super Character> customComparator)` Deprecated. Custom element Comparator is not supported for CharSequence comparison.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AbstractCharSequenceAssert
```
public AbstractCharSequenceAssert(ACTUAL actual,
                                  Class<?> selfType)
```
- Method Detail
  - isNullOrEmpty
```
public void isNullOrEmpty()
```
    Verifies that the actual CharSequence is empty, i.e., it has a length of 0, or is null.
    If you do not want to accept a null value, use isEmpty() instead.
    Both of these assertions will succeed:
```
 String emptyString = ""
 assertThat(emptyString).isNullOrEmpty();

 String nullString = null;
 assertThat(nullString).isNullOrEmpty();
```
    Whereas these assertions will fail:
```
 assertThat("a").isNullOrEmpty();
 assertThat("   ").isNullOrEmpty();
```
    Specified by:
    
    isNullOrEmpty in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Throws:
    
    AssertionError - if the actual CharSequence has a non-zero length.
  - isEmpty
```
public void isEmpty()
```
    Verifies that the actual CharSequence is empty, i.e., it has a length of 0 and is not null.
    If you want to accept a null value as well as a 0 length, use isNullOrEmpty() instead.
    This assertion will succeed:
```
 String emptyString = ""
 assertThat(emptyString).isEmpty();
```
    Whereas these assertions will fail:
```
 String nullString = null;
 assertThat(nullString).isEmpty();
 assertThat("a").isEmpty();
 assertThat("   ").isEmpty();
```
    Specified by:
    
    isEmpty in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Throws:
    
    AssertionError - if the actual CharSequence has a non-zero length or is null.
  - isNotEmpty
```
public SELF isNotEmpty()
```
    Verifies that the actual CharSequence is not empty, i.e., is not null and has a length of 1 or more.
    This assertion will succeed:
```
 String bookName = "A Game of Thrones"
 assertThat(bookName).isNotEmpty();
```
    Whereas these assertions will fail:
```
 String emptyString = ""
 assertThat(emptyString).isNotEmpty();

 String nullString = null;
 assertThat(nullString).isNotEmpty();
```
    Specified by:
    
    isNotEmpty in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is empty (has a length of 0).
  - isBlank
```
public SELF isBlank()
```
    Verifies that the actual CharSequence is blank, i.e. is null, empty or consists of one or more whitespace characters (according to Character.isWhitespace(char)).
    The definition of this method has changed, the old behaviour is now under containsOnlyWhitespaces().
    These assertions succeed:
```
 assertThat(" ").isBlank();
 assertThat("").isBlank();
 assertThat("    ").isBlank();
 String nullString = null;
 assertThat(nullString).isBlank();
```
    Whereas these assertions fail:
```
 assertThat("a").isBlank();
 assertThat(" b").isBlank();
 assertThat(" c ").isBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - isNotBlank
```
public SELF isNotBlank()
```
    Verifies that the actual CharSequence is:
    - not null
    - not empty
    - contains at least one non-whitespace character (according to Character.isWhitespace(char))
    The definition of this method has changed, the old behaviour is now under doesNotContainOnlyWhitespaces().
    These assertions succeed:
```
 assertThat("a").isNotBlank();
 assertThat(" b").isNotBlank();
 assertThat(" c ").isNotBlank();
```
    Whereas these assertions fail:
```
 assertThat(" ").isNotBlank();
 assertThat("").isNotBlank();
 assertThat("    ").isNotBlank();
 String nullString = null;
 assertThat(nullString).isNotBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - containsWhitespaces
```
public SELF containsWhitespaces()
```
    Verifies that the actual CharSequence contains one or more whitespace characters (according to Character.isWhitespace(char)).
    These assertions will succeed:
```
 assertThat(" ").containsWhitespaces();
 assertThat("a b").containsWhitespaces();
 assertThat(" c ").containsWhitespaces();
```
    Whereas these assertions will fail:
```
 assertThat("").containsWhitespaces();
 assertThat("a").containsWhitespaces();
 String nullString = null;
 assertThat(nullString).containsWhitespaces();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence does not contain any whitespace characters.
    
    Since:
    
    3.11.0
  - containsOnlyWhitespaces
```
public SELF containsOnlyWhitespaces()
```
    Verifies that the actual CharSequence consists of one or more whitespace characters (according to Character.isWhitespace(char)).
    These assertions will succeed:
```
 assertThat(" ").containsOnlyWhitespaces();
 assertThat("    ").containsOnlyWhitespaces();
```
    Whereas these assertions will fail:
```
 assertThat("a").containsOnlyWhitespaces();
 assertThat("").containsOnlyWhitespaces();
 assertThat(" b").containsOnlyWhitespaces();
 assertThat(" c ").containsOnlyWhitespaces();

 String nullString = null;
 assertThat(nullString).containsOnlyWhitespaces();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not blank.
    
    Since:
    
    2.9.0 / 3.9.0
  - doesNotContainAnyWhitespaces
```
public SELF doesNotContainAnyWhitespaces()
```
    Verifies that the actual CharSequence is either null, empty or does not contain any whitespace characters (according to Character.isWhitespace(char)).
    These assertions will succeed:
```
 assertThat("a").doesNotContainAnyWhitespaces();
 assertThat("").doesNotContainAnyWhitespaces();
 assertThat("ab").doesNotContainAnyWhitespaces();

 String nullString = null;
 assertThat(nullString).doesNotContainAnyWhitespaces();
```
    Whereas these assertions will fail:
```
 assertThat(" ").doesNotContainAnyWhitespaces();
 assertThat(" a").doesNotContainAnyWhitespaces();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence contains one or more whitespace characters.
    
    Since:
    
    3.11.0
  - doesNotContainOnlyWhitespaces
```
public SELF doesNotContainOnlyWhitespaces()
```
    Verifies that the actual CharSequence is either:
    - null
    - empty
    - contains at least one non-whitespace character (according to Character.isWhitespace(char)).
    The main difference with isNotBlank() is that it accepts null or empty CharSequence.
    These assertions will succeed:
```
 assertThat("a").doesNotContainOnlyWhitespaces();
 assertThat("").doesNotContainOnlyWhitespaces();
 assertThat(" b").doesNotContainOnlyWhitespaces();
 assertThat(" c ").doesNotContainOnlyWhitespaces();
 String nullString = null;
 assertThat(nullString).doesNotContainOnlyWhitespaces();
```
    Whereas these assertions will fail:
```
 assertThat(" ").doesNotContainOnlyWhitespaces();
 assertThat("    ").doesNotContainOnlyWhitespaces();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is blank.
    
    Since:
    
    2.9.0 / 3.9.0
  - isJavaBlank
```
@Deprecated
public SELF isJavaBlank()
```
    Deprecated. Use isBlank() instead.
    Verifies that the actual CharSequence is blank, i.e. consists of one or more whitespace characters (according to Character.isWhitespace(char)).
    These assertions will succeed:
```
 assertThat(" ").isJavaBlank();
 assertThat("     ").isJavaBlank();
```
    Whereas these assertions will fail:
```
 assertThat("a").isJavaBlank();
 assertThat(" b").isJavaBlank();
 assertThat("").isJavaBlank();
 String nullString = null;
 assertThat(nullString).isJavaBlank(); 
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - isNotJavaBlank
```
@Deprecated
public SELF isNotJavaBlank()
```
    Deprecated. Use isNotBlank() instead.
    Verifies that the actual CharSequence is not blank, i.e. either is null, empty or contains at least one non-whitespace character (according to Character.isWhitespace(char)).
    These assertions will succeed:
```
 assertThat("a").isNotJavaBlank();
 assertThat(" b").isNotJavaBlank();
 assertThat(" c ").isNotJavaBlank();
 assertThat("").isNotJavaBlank();
 String nullString = null;
 assertThat(nullString).isNotJavaBlank();
```
    Whereas these assertions will fail:
```
 assertThat(" ").isNotJavaBlank();
 assertThat("   ").isNotJavaBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - hasSize
```
public SELF hasSize(int expected)
```
    Verifies that the actual CharSequence has the expected length using the length() method.
    This assertion will succeed:
```
 String bookName = "A Game of Thrones"
 assertThat(bookName).hasSize(17);
```
    Whereas this assertion will fail:
```
 String bookName = "A Clash of Kings"
 assertThat(bookName).hasSize(4);
```
    Specified by:
    
    hasSize in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Parameters:
    
    expected - the expected length of the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual length is not equal to the expected length.
  - hasLineCount
```
public SELF hasLineCount(int expectedLineCount)
```
    Verifies that the actual CharSequence has the expected line count.
    A line is considered to be terminated by any one of a line feed ('\n'), a carriage return ('\r'), or a carriage return followed immediately by a linefeed (see LineNumberReader).
    This assertion will succeed:
```
 String multiLine = "First line\n" +
                    "Last line";
 assertThat(multiLine).hasLineCount(2);
```
    Whereas this assertion will fail:
```
 String bookName = "A Clash of Kings";
 assertThat(bookName).hasLineCount(3);
```
    Parameters:
    
    expectedLineCount - the expected line count of the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual line count is not equal to the expected one.
  - hasSameSizeAs
```
public SELF hasSameSizeAs(CharSequence other)
```
    Verifies that the actual CharSequence has a length that's the same as the length of the given CharSequence.
    Examples :
```
 // assertion will pass
 assertThat("C-3PO").hasSameSizeAs("R2-D2");

 // assertion will fail as actual and expected sizes differ
 assertThat("C-3PO").hasSameSizeAs("B1 battle droid");
```
    Parameters:
    
    other - the given CharSequence to be used for size comparison.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence has a length that's different from the length of the given CharSequence.
    
    NullPointerException - if the given CharSequence is null.
  - hasSameSizeAs
```
public SELF hasSameSizeAs(Object other)
```
    Verifies that the actual CharSequence has a length that's the same as the number of elements in the given array.
    Example:
```
 // assertion will pass
 assertThat("12").hasSameSizeAs(new char[] { 'a', 'b' });

 // assertion will fail
 assertThat("12").hasSameSizeAs(new char[] { 'a', 'b', 'c' });
```
    Specified by:
    
    hasSameSizeAs in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Parameters:
    
    other - the given array to be used for size comparison.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence has a length that's different from the number of elements in the array.
    
    NullPointerException - if the given array is null.
  - hasSameSizeAs
```
public SELF hasSameSizeAs(Iterable<?> other)
```
    Verifies that the actual CharSequence has a length that's the same as the number of elements in the given Iterable.
    Example:
```
 // assertion will pass
 assertThat("abc").hasSameSizeAs(Arrays.asList(1, 2, 3));

 // assertion will fail
 assertThat("ab").hasSameSizeAs(Arrays.asList(1, 2, 3));
```
    Specified by:
    
    hasSameSizeAs in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Parameters:
    
    other - the given Iterable to be used for size comparison.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence has a length that's different from the number of elements in the Iterable.
    
    NullPointerException - if the given Iterable is null.
  - isEqualToIgnoringCase
```
public SELF isEqualToIgnoringCase(CharSequence expected)
```
    Verifies that the actual CharSequence is equal to the given one, ignoring case considerations.
    Example :
```
 // assertion will pass
 assertThat("Gandalf the grey").isEqualToIgnoringCase("GaNdAlF tHe GREY");
 assertThat("Gandalf the grey").isEqualToIgnoringCase("Gandalf the grey");

 // assertion will fail
 assertThat("Gandalf the grey").isEqualToIgnoringCase("Gandalf the white");
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not equal to the given one.
  - isNotEqualToIgnoringCase
```
public SELF isNotEqualToIgnoringCase(CharSequence expected)
```
    Verifies that the actual CharSequence is not equal to the given one, ignoring case considerations.
    Example :
```
 // assertions will pass
 assertThat("Gandalf").isNotEqualToIgnoringCase("Hobbit");
 assertThat("Gandalf").isNotEqualToIgnoringCase("HOBit");
 assertThat((String) null).isNotEqualToIgnoringCase("Gandalf");
 assertThat("Gandalf").isNotEqualToIgnoringCase(null);

 // assertions will fail
 assertThat("Gandalf").isNotEqualToIgnoringCase("Gandalf");
 assertThat("Gandalf").isNotEqualToIgnoringCase("GaNDalf");
 assertThat((String) null).isNotEqualToIgnoringCase(null);
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not equal to the given one.
  - containsOnlyDigits
```
public SELF containsOnlyDigits()
```
    Verifies that the actual CharSequence contains only digits. It fails if it contains non-digit characters or is empty.
    This assertion succeeds:
```
 assertThat("10").containsOnlyDigits();
```
    Whereas these assertions fail:
```
 assertThat("10$").containsOnlyDigits();
 assertThat("").containsOnlyDigits();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence contains non-digit characters or is null.
  - containsOnlyOnce
```
public SELF containsOnlyOnce(CharSequence sequence)
```
    Verifies that the actual CharSequence contains the given sequence only once.
    Example :
```
 // assertion will pass
 assertThat("Frodo").containsOnlyOnce("do");

 // assertions will fail
 assertThat("Frodo").containsOnlyOnce("o");
 assertThat("Frodo").containsOnlyOnce("y");
```
    Parameters:
    
    sequence - the sequence to search for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence either does not contain the given one at all, or contains it more than once.
  - contains
```
public SELF contains(CharSequence... values)
```
    Verifies that the actual CharSequence contains all the given values.
    You can use one or several CharSequences as in this example:
```
 assertThat("Gandalf the grey").contains("alf");
 assertThat("Gandalf the grey").contains("alf", "grey");
```
    Parameters:
    
    values - the Strings to look for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given list of values is null.
    
    IllegalArgumentException - if the list of given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not contain all the given strings.
  - contains
```
public SELF contains(Iterable<? extends CharSequence> values)
```
    Verifies that the actual CharSequence contains all the CharSequences of the given Iterable.
    Examples:
```
 assertThat("Gandalf the grey").contains(Arrays.asList("alf"));
 assertThat("Gandalf the grey").contains(Arrays.asList("alf", "grey"));
```
    Parameters:
    
    values - the Strings to look for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given list of values is null.
    
    IllegalArgumentException - if the list of given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not contain all the given values.
  - containsSequence
```
public SELF containsSequence(CharSequence... values)
```
    Verifies that the actual CharSequence contains the given sequence of values in the given order without any other values between them.
    Breaking change since 2.9.0: in previous versions this assertion behaved like containsSubsequence and allowed other values between the sequence values.
    Example:
```
 String book = "{ 'title':'A Game of Thrones', 'author':'George Martin'}";

 // this assertion succeeds
 assertThat(book).containsSequence("'title'", ":", "'A Game of Thrones'");

 // this assertion will fail because there are values between the expected sequence (e.g "'title':'")
 assertThat(book).containsSequence("{", "A Game of Thrones", "George Martin", "}");

 // this one fails as ":" must come after "'title'"
 assertThat(book).containsSequence(":", "'title'", "'A Game of Thrones'");
```
    Parameters:
    
    values - the sequence of charSequence to look for, in order.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given sequence of charSequence is null.
    
    IllegalArgumentException - if the given sequence of charSequence is empty.
    
    AssertionError - if the given CharSequence is null.
    
    AssertionError - if the given CharSequence does not contain the given sequence of values in the given order without any other values between them.
  - containsSequence
```
public SELF containsSequence(Iterable<? extends CharSequence> values)
```
    Verifies that the actual CharSequence contains all the values of the given Iterable in the Iterable iteration order without any other values between them.
    Breaking change since 2.9.0: in previous versions this assertion behaved like containsSubsequence and allowed other values between the sequence values.
    Example:
```
 String book = "{ 'title':'A Game of Thrones', 'author':'George Martin'}";

 // this assertion succeeds
 assertThat(book).containsSequence(asList("'title'", ":", "'A Game of Thrones'"));

 // this assertion will fail because there are values between the expected sequence (e.g "'title':'")
 assertThat(book).containsSequence(asList("{", "A Game of Thrones", "George Martin", "}"));

 // this one fails as "author" must come after "A Game of Thrones"
 assertThat(book).containsSequence(asList("author", "A Game of Thrones"));
```
    Parameters:
    
    values - the sequence of charSequence to look for, in order.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given sequence of charSequence is null.
    
    IllegalArgumentException - if the given sequence of charSequence is empty.
    
    AssertionError - if the given CharSequence is null.
    
    AssertionError - if the given CharSequence does not contain the given sequence of values in the given order without any other charvalues between them.
  - containsSubsequence
```
public SELF containsSubsequence(CharSequence... values)
```
    Verifies that the actual CharSequence contains all the given values in the given order, possibly with other values between them.
    Example:
```
 String book = "{ 'title':'A Game of Thrones', 'author':'George Martin'}";

 // this assertion succeeds
 assertThat(book).containsSubsequence("'title'", ":", "'A Game of Thrones'");

 // these ones succeed even if there are values between the given values
 assertThat(book).containsSubsequence("{", "A Game of Thrones", "George Martin", "}");
 assertThat(book).containsSubsequence("A", "Game", "of", "George");

 // this one fails as "author" must come after "A Game of Thrones"
 assertThat(book).containsSubsequence("{", "author", "A Game of Thrones", "}");
```
    Parameters:
    
    values - the Strings to look for, in order.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given values is null.
    
    IllegalArgumentException - if the given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not contain all the given values in the given order.
  - containsSubsequence
```
public SELF containsSubsequence(Iterable<? extends CharSequence> values)
```
    Verifies that the actual CharSequence contains all the values of the given Iterable in the Iterable iteration order (possibly with other values between them).
    Example:
```
 String book = "{ 'title':'A Game of Thrones', 'author':'George Martin'}";

 // this assertion succeeds
 assertThat(book).containsSubsequence(asList("'title'", ":", "'A Game of Thrones'"));

 // these ones succeed even if there are values between the given values
 assertThat(book).containsSubsequence(asList("{", "A Game of Thrones", "George Martin", "}"));
 assertThat(book).containsSubsequence(asList("A", "Game", "of", "George"));

 // but this one fails as "author" must come after "A Game of Thrones"
 assertThat(book).containsSubsequence(asList("{", "author", "A Game of Thrones", "}"));
```
    Parameters:
    
    values - the Strings to look for, in order.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given values is null.
    
    IllegalArgumentException - if the given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not contain all the given values in the given order.
  - containsIgnoringCase
```
public SELF containsIgnoringCase(CharSequence sequence)
```
    Verifies that the actual CharSequence contains the given sequence, ignoring case considerations.
    Example :
```
 // assertion will pass
 assertThat("Gandalf the grey").containsIgnoringCase("gandalf");

 // assertion will fail
 assertThat("Gandalf the grey").containsIgnoringCase("white");
```
    Parameters:
    
    sequence - the sequence to search for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given sequence is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not contain the given one.
  - doesNotContain
```
public SELF doesNotContain(CharSequence... values)
```
    Verifies that the actual CharSequence does not contain any of the given values.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotContain("pippin")
                              .doesNotContain("fro", "sam");


 // assertion will fail
 assertThat("Frodo").doesNotContain("Fro", "Gimli", "Legolas");
```
    Parameters:
    
    values - the CharSequences to search for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given list of values is null.
    
    IllegalArgumentException - if the list of given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence contains any of the given values.
  - doesNotContain
```
public SELF doesNotContain(Iterable<? extends CharSequence> values)
```
    Verifies that the actual CharSequence does not contain any of the given Iterable.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotContain(Arrays.asList(""))
                              .doesNotContain(Arrays.asList("fro", "sam"));

 // assertion will fail
 assertThat("Frodo").doesNotContain(Arrays.asList("Fro", "Gimli", "Legolas"));
```
    Parameters:
    
    values - the CharSequences to search for.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given list of values is null.
    
    IllegalArgumentException - if the list of given values is empty.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence contains any of the given values.
  - doesNotContainPattern
```
public SELF doesNotContainPattern(CharSequence pattern)
```
    Verifies that the actual CharSequence does not contain the given regular expression.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotContainPattern("Fr.ud");

 // assertion will fail
 assertThat("Freud").doesNotContainPattern("Fr.ud");
```
    Parameters:
    
    pattern - the regular expression to find in the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    PatternSyntaxException - if the regular expression's syntax is invalid.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the given regular expression can be found in the actual CharSequence.
    
    Since:
    
    2.7.0 / 3.7.0
  - doesNotContainPattern
```
public SELF doesNotContainPattern(Pattern pattern)
```
    Verifies that the actual CharSequence does not contain the given regular expression.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotContainPattern(Pattern.compile("Fr.ud"));

 // assertion will fail
 assertThat("Freud").doesNotContainPattern(Pattern.compile("Fr.ud"));
```
    Parameters:
    
    pattern - the regular expression to find in the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the given regular expression can be found in the actual CharSequence.
    
    Since:
    
    2.7.0 / 3.7.0
  - startsWith
```
public SELF startsWith(CharSequence prefix)
```
    Verifies that the actual CharSequence starts with the given prefix.
    Example :
```
 // assertions will pass
 assertThat("Frodo").startsWith("Fro");
 assertThat("Gandalf the grey").startsWith("Gandalf");

 // assertions will fail
 assertThat("Frodo").startsWith("fro");
 assertThat("Gandalf the grey").startsWith("grey");
```
    Parameters:
    
    prefix - the given prefix.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given prefix is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not start with the given prefix.
  - doesNotStartWith
```
public SELF doesNotStartWith(CharSequence prefix)
```
    Verifies that the actual CharSequence does not start with the given prefix.
    Example:
```
 // assertions will pass
 assertThat("Frodo").doesNotStartWith("fro");
 assertThat("Gandalf the grey").doesNotStartWith("grey");

 // assertions will fail
 assertThat("Gandalf the grey").doesNotStartWith("Gandalf");
 assertThat("Frodo").doesNotStartWith("");
```
    Parameters:
    
    prefix - the given prefix.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given prefix is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence starts with the given prefix.
  - endsWith
```
public SELF endsWith(CharSequence suffix)
```
    Verifies that the actual CharSequence ends with the given suffix.
    Example :
```
 // assertion will pass
 assertThat("Frodo").endsWith("do");

 // assertion will fail
 assertThat("Frodo").endsWith("Fro");
```
    Parameters:
    
    suffix - the given suffix.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given suffix is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not end with the given suffix.
  - doesNotEndWith
```
public SELF doesNotEndWith(CharSequence suffix)
```
    Verifies that the actual CharSequence does not end with the given suffix.
    Example:
```
 // assertion will pass
 assertThat("Frodo").doesNotEndWith("Fro");

 // assertions will fail
 assertThat("Frodo").doesNotEndWith("do");
 assertThat("Frodo").doesNotEndWith("");
```
    Parameters:
    
    suffix - the given suffix.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given suffix is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence ends with the given suffix.
  - matches
```
public SELF matches(CharSequence regex)
```
    Verifies that the actual CharSequence matches the given regular expression.
    Example :
```
 // assertion will pass
 assertThat("Frodo").matches("..o.o");

 // assertion will fail
 assertThat("Frodo").matches(".*d");
```
    Parameters:
    
    regex - the regular expression to which the actual CharSequence is to be matched.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    PatternSyntaxException - if the regular expression's syntax is invalid.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not match the given regular expression.
  - doesNotMatch
```
public SELF doesNotMatch(CharSequence regex)
```
    Verifies that the actual CharSequence does not match the given regular expression.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotMatch(".*d");

 // assertion will fail
 assertThat("Frodo").doesNotMatch("..o.o");
```
    Parameters:
    
    regex - the regular expression to which the actual CharSequence is to be matched.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    PatternSyntaxException - if the regular expression's syntax is invalid.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence matches the given regular expression.
  - matches
```
public SELF matches(Pattern pattern)
```
    Verifies that the actual CharSequence matches the given regular expression pattern.
    Example :
```
 // assertion will pass
 assertThat("Frodo").matches(Pattern.compile("..o.o"));

 // assertion will fail
 assertThat("Frodo").matches(Pattern.compile(".*d"));
```
    Parameters:
    
    pattern - the regular expression to which the actual CharSequence is to be matched.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the actual CharSequence does not match the given regular expression.
  - doesNotMatch
```
public SELF doesNotMatch(Pattern pattern)
```
    Verifies that the actual CharSequence does not match the given regular expression pattern.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotMatch(Pattern.compile(".*d"));

 // assertion will fail
 assertThat("Frodo").doesNotMatch(Pattern.compile("..o.o"));
```
    Parameters:
    
    pattern - the regular expression to which the actual CharSequence is to be matched.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    AssertionError - if the actual CharSequence does not match the given regular expression.
  - isXmlEqualTo
```
public SELF isXmlEqualTo(CharSequence expectedXml)
```
    Verifies that the actual CharSequence is equal to the given XML CharSequence after both have been formatted the same way.
    Example :
```
 String expectedXml =
     "<rings>\n" +
         "  <bearer>\n" +
         "    <name>Frodo</name>\n" +
         "    <ring>\n" +
         "      <name>one ring</name>\n" +
         "      <createdBy>Sauron</createdBy>\n" +
         "    </ring>\n" +
         "  </bearer>\n" +
         "</rings>";

 // No matter how your xml string is formated, isXmlEqualTo is able to compare it's content with another xml String.
 String oneLineXml = "<rings><bearer><name>Frodo</name><ring><name>one ring</name><createdBy>Sauron</createdBy></ring></bearer></rings>";
 assertThat(oneLineXml).isXmlEqualTo(expectedXml);

 String xmlWithNewLine =
     "<rings>\n" +
         "<bearer>   \n" +
         "  <name>Frodo</name>\n" +
         "  <ring>\n" +
         "    <name>one ring</name>\n" +
         "    <createdBy>Sauron</createdBy>\n" +
         "  </ring>\n" +
         "</bearer>\n" +
         "</rings>";
 assertThat(xmlWithNewLine).isXmlEqualTo(expectedXml);

 // You can compare it with oneLineXml
 assertThat(xmlWithNewLine).isXmlEqualTo(oneLineXml);

 // Tip : use isXmlEqualToContentOf assertion to compare your XML String with the content of an XML file :
 assertThat(oneLineXml).isXmlEqualToContentOf(new File("src/test/resources/formatted.xml"));
```
    Parameters:
    
    expectedXml - the XML CharSequence to which the actual CharSequence is to be compared to.
    
    Returns:
    
    this assertion object to chain other assertions.
    
    Throws:
    
    NullPointerException - if the given CharSequence is null.
    
    AssertionError - if the actual CharSequence is null or is not the same XML as the given XML CharSequence.
  - isXmlEqualToContentOf
```
public SELF isXmlEqualToContentOf(File xmlFile)
```
    Verifies that the actual CharSequence is equal to the content of the given file.
    This is an handy shortcut that calls : isXmlEqualTo(contentOf(xmlFile))
    Example :
```
 // You can easily compare your XML String to the content of an XML file, whatever how formatted they are.
 String oneLineXml = "<rings><bearer><name>Frodo</name><ring><name>one ring</name><createdBy>Sauron</createdBy></ring></bearer></rings>";
 assertThat(oneLineXml).isXmlEqualToContentOf(new File("src/test/resources/formatted.xml"));
```
    Parameters:
    
    xmlFile - the file to read the expected XML String to compare with actual CharSequence
    
    Returns:
    
    this assertion object to chain other assertions.
    
    Throws:
    
    NullPointerException - if the given File is null.
    
    AssertionError - if the actual CharSequence is null or is not the same XML as the content of given File.
  - usingElementComparator
```
@Deprecated
public final SELF usingElementComparator(Comparator<? super Character> customComparator)
```
    Deprecated. Custom element Comparator is not supported for CharSequence comparison.
    
    Do not use this method.
    
    Specified by:
    
    usingElementComparator in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Parameters:
    
    customComparator - the comparator to use for incoming assertion checks.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    UnsupportedOperationException - if this method is called.
  - usingDefaultElementComparator
```
@Deprecated
public final SELF usingDefaultElementComparator()
```
    Deprecated. Custom element Comparator is not supported for CharSequence comparison.
    
    Do not use this method.
    
    Specified by:
    
    usingDefaultElementComparator in interface EnumerableAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,Character>
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    UnsupportedOperationException - if this method is called.
  - usingComparator
```
public SELF usingComparator(Comparator<? super ACTUAL> customComparator)
```
    Description copied from class: AbstractAssert
    Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
    The custom comparator is bound to assertion instance, meaning that if a new assertion instance is created, the default comparison strategy will be used.
    Examples :
```
 // frodo and sam are instances of Character with Hobbit race (obviously :).
 // raceComparator implements Comparator<Character>
 assertThat(frodo).usingComparator(raceComparator).isEqualTo(sam);
```
    Specified by:
    
    usingComparator in interface Assert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Overrides:
    
    usingComparator in class AbstractAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Parameters:
    
    customComparator - the comparator to use for the incoming assertion checks.
    
    Returns:
    
    this assertion object.
  - usingComparator
```
public SELF usingComparator(Comparator<? super ACTUAL> customComparator,
                            String customComparatorDescription)
```
    Description copied from class: AbstractAssert
    Use the given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
    The custom comparator is bound to assertion instance, meaning that if a new assertion instance is created, the default comparison strategy will be used.
    Examples :
```
 // frodo and sam are instances of Character with Hobbit race (obviously :).
 // raceComparator implements Comparator<Character>
 assertThat(frodo).usingComparator(raceComparator, "Hobbit Race Comparator").isEqualTo(sam);
```
    Specified by:
    
    usingComparator in interface Assert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Overrides:
    
    usingComparator in class AbstractAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Parameters:
    
    customComparator - the comparator to use for the incoming assertion checks.
    
    customComparatorDescription - comparator description to be used in assertion error messages
    
    Returns:
    
    this assertion object.
  - usingDefaultComparator
```
public SELF usingDefaultComparator()
```
    Description copied from class: AbstractAssert
    
    Revert to standard comparison for the incoming assertion checks.
    This method should be used to disable a custom comparison strategy set by calling usingComparator.
    
    Specified by:
    
    usingDefaultComparator in interface Assert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Overrides:
    
    usingDefaultComparator in class AbstractAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Returns:
    
    this assertion object.
  - inHexadecimal
```
public SELF inHexadecimal()
```
    Description copied from class: AbstractAssert
    Use hexadecimal object representation instead of standard representation in error messages.
    It can be useful when comparing UNICODE characters - many unicode chars have duplicate characters assigned, it is thus impossible to find differences from the standard error message:
    With standard message:
```
 assertThat("µµµ").contains("μμμ");

 java.lang.AssertionError:
 Expecting:
   <"µµµ">
 to contain:
   <"μμμ">
```
    With Hexadecimal message:
```
 assertThat("µµµ").inHexadecimal().contains("μμμ");

 java.lang.AssertionError:
 Expecting:
   <"['00B5', '00B5', '00B5']">
 to contain:
   <"['03BC', '03BC', '03BC']">
```
    Overrides:
    
    inHexadecimal in class AbstractAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>
    
    Returns:
    
    this assertion object.
  - inUnicode
```
public SELF inUnicode()
```
    Use unicode character representation instead of standard representation in error messages.
    It can be useful when comparing UNICODE characters - many unicode chars have duplicate characters assigned, it is thus impossible to find differences from the standard error message:
    With standard message:
```
 assertThat("µµµ").contains("μμμ");

 java.lang.AssertionError:
 Expecting:
   <"µµµ">
 to contain:
   <"μμμ">
```
    With Hexadecimal message:
```
 assertThat("µµµ").inUnicode().contains("μμμ");

 java.lang.AssertionError:
 Expecting:
   <µµµ>
 to contain:
   <μμμ>
```
    Returns:
    
    this assertion object.
  - isEqualToIgnoringWhitespace
```
public SELF isEqualToIgnoringWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is equal to the given one, ignoring whitespace differences
    Examples :
```
 // assertions will pass
 assertThat("Game of Thrones").isEqualToIgnoringWhitespace("Game   of   Thrones")
                              .isEqualToIgnoringWhitespace("  Game of   Thrones  ")
                              .isEqualToIgnoringWhitespace("  Game of Thrones  ")
                              .isEqualToIgnoringWhitespace("Gameof      Thrones")
                              .isEqualToIgnoringWhitespace("Game of\tThrones")
                              .isEqualToIgnoringWhitespace("GameofThrones");

 // assertion will fail
 assertThat("Game of Thrones").isEqualToIgnoringWhitespace("Game OF Thrones");
```
    This assertion behavior has changed in 2.8.0 to really ignore all whitespaces, the old behaviour has been kept in the better named isEqualToNormalizingWhitespace(CharSequence).
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not equal ignoring whitespace differences to the given one.
  - isNotEqualToIgnoringWhitespace
```
public SELF isNotEqualToIgnoringWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is not equal to the given one, ignoring whitespace differences.
    Example :
```
 // assertions will pass
 assertThat(" my\tfoo bar ").isNotEqualToIgnoringWhitespace("myfoo");
 assertThat(" my\tfoo").isNotEqualToIgnoringWhitespace(" my bar");

 // assertions will fail
 assertThat("my      foo bar").isNotEqualToIgnoringWhitespace("my foo bar");
 assertThat("  my foo bar  ").isNotEqualToIgnoringWhitespace("my foo bar");
 assertThat(" my     foo bar ").isNotEqualToIgnoringWhitespace("my foo bar");
 assertThat(" my\tfoo bar ").isNotEqualToIgnoringWhitespace(" my foo bar");
 assertThat("my foo bar").isNotEqualToIgnoringWhitespace("   my foo bar   ");
 
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is equal ignoring whitespace differences to the given one.
  - isEqualToNormalizingWhitespace
```
public SELF isEqualToNormalizingWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is equal to the given one, after the whitespace of both strings has been normalized.
    To be exact, the following rules are applied:
    - all leading and trailing whitespace of both actual and expected strings are ignored
    - any remaining whitespace, appearing within either string, is collapsed to a single space before comparison
    Example :
```
 // assertions will pass
 assertThat("Game of Thrones").isEqualToNormalizingWhitespace("Game   of   Thrones")
                              .isEqualToNormalizingWhitespace("Game of     Thrones")
                              .isEqualToNormalizingWhitespace("Game     of Thrones")
                              .isEqualToNormalizingWhitespace("  Game of Thrones  ")
                              .isEqualToNormalizingWhitespace("  Game of   Thrones  ")
                              .isEqualToNormalizingWhitespace("Game of\tThrones")
                              .isEqualToNormalizingWhitespace("Game of Thrones");

 // assertions will fail
 assertThat("Game of Thrones").isEqualToNormalizingWhitespace("Game ofThrones");
 assertThat("Game of Thrones").isEqualToNormalizingWhitespace("Gameo fThrones");
 assertThat("Game of Thrones").isEqualToNormalizingWhitespace("Gameof Thrones");
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not equal to the given one after whitespace has been normalized.
    
    Since:
    
    2.8.0 / 3.8.0
  - isNotEqualToNormalizingWhitespace
```
public SELF isNotEqualToNormalizingWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is not equal to the given one, after the whitespace of both strings has been normalized.
    To be exact, the following rules are applied:
    - all leading and trailing whitespace of both actual and expected strings are ignored
    - any remaining whitespace, appearing within either string, is collapsed to a single space before comparison
    Example :
```
 // assertions will pass
 assertThat(" my\tfoo").isNotEqualToNormalizingWhitespace(" my bar");
 assertThat(" my\tfoo bar ").isNotEqualToNormalizingWhitespace(" my foobar");

 // assertions will fail
 assertThat("my      foo bar").isNotEqualToNormalizingWhitespace("my foo bar");
 assertThat("  my foo bar  ").isNotEqualToNormalizingWhitespace("my foo bar");
 assertThat(" my     foo bar ").isNotEqualToNormalizingWhitespace("my foo bar");
 assertThat(" my\tfoo bar ").isNotEqualToNormalizingWhitespace(" my foo bar");
 assertThat("my foo bar").isNotEqualToNormalizingWhitespace("   my foo bar   ");
 
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is equal to the given one after whitespace has been normalized.
    
    Since:
    
    2.8.0 / 3.8.0
  - isSubstringOf
```
public SELF isSubstringOf(CharSequence sequence)
```
    Verifies that the actual CharSequence is a substring of the given one (opposite assertion of contains(CharSequence cs).
    Example :
```
 // assertions will pass
 assertThat("Lego").isSubstringOf("Legolas");
 assertThat("Legolas").isSubstringOf("Legolas");

 // assertion will fail
 assertThat("Frodo").isSubstringOf("Frod");
```
    Parameters:
    
    sequence - the sequence that is expected to contain actual.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not a substring of the given parameter.
  - containsPattern
```
public SELF containsPattern(CharSequence regex)
```
    Verifies that the actual CharSequence contains the given regular expression.
    Example :
```
 // assertion will pass
 assertThat("Frodo").containsPattern("Fr.d");

 // assertion will fail
 assertThat("Frodo").containsPattern("Frodod");
```
    Parameters:
    
    regex - the regular expression to find in the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    PatternSyntaxException - if the regular expression's syntax is invalid.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the given regular expression cannot be found in the actual CharSequence.
  - containsPattern
```
public SELF containsPattern(Pattern pattern)
```
    Verifies that the actual CharSequence contains the given regular expression pattern.
    Example :
```
 // assertion will pass
 assertThat("Frodo").containsPattern(Pattern.compile("Fr.d"));

 // assertion will fail
 assertThat("Frodo").containsPattern(Pattern.compile("Frodod"));
```
    Parameters:
    
    pattern - the regular expression to find in the actual CharSequence.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    NullPointerException - if the given pattern is null.
    
    AssertionError - if the actual CharSequence is null.
    
    AssertionError - if the given regular expression cannot be found in the actual CharSequence.
  - isEqualToNormalizingNewlines
```
public SELF isEqualToNormalizingNewlines(CharSequence expected)
```
    Verifies that the actual CharSequence is equals to another CharSequence after normalizing new line characters (i.e. '\r\n' == '\n').
    This assertion will succeed:
```
 String bookName = "Lord of the Rings\r\n";
 assertThat(bookName).isEqualToNormalizingNewlines("Lord of the Rings\n");
```
    Whereas this assertion will fail:
```
 String singleLine = "\n";
 assertThat(singleLine).isEqualToNormalizingNewlines("");
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence and the given CharSequence are different after new lines are normalized.
    
    Since:
    
    2.7.0 / 3.7.0
  - isEqualToIgnoringNewLines
```
public SELF isEqualToIgnoringNewLines(CharSequence expected)
```
    Verifies that the actual CharSequence is equal to the given one after both strings new lines (\n, \r\n) have been removed.
    Example :
```
 // assertions will pass
 assertThat("Some textWith new lines").isEqualToIgnoringNewLines("Some text\nWith new lines")
                                      .isEqualToIgnoringNewLines("Some text\r\nWith new lines")
                                      .isEqualToIgnoringNewLines("Some text\n\nWith new lines");

 assertThat("Some text\nWith new lines").isEqualToIgnoringNewLines("Some text\nWith new lines")
                                        .isEqualToIgnoringNewLines("Some text\r\nWith new lines")
                                        .isEqualToIgnoringNewLines("Some text\n\nWith new lines");

 // assertions will fail
 assertThat("Some text\nWith new lines").isEqualToIgnoringNewLines("Some text With new lines");
 assertThat("Some text\r\nWith new lines").isEqualToIgnoringNewLines("Some text With new lines");
```
    Parameters:
    
    expected - the given CharSequence to compare the actual CharSequence to.
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not equal to the given one after new lines have been removed.
  - isLowerCase
```
public SELF isLowerCase()
```
    Verifies that the actual CharSequence is a lowercase CharSequence by comparing it to a lowercase actual built with String.toLowerCase().
    Example :
```
 // assertions will pass
 assertThat("lego").isLowerCase();
 assertThat("").isLowerCase();
 assertThat(" ").isLowerCase();
 assertThat(".").isLowerCase();
 assertThat("7").isLowerCase();
 assertThat("a.7").isLowerCase();

 // assertions will fail
 assertThat("Lego").isLowerCase();
 assertThat("LEGO").isLowerCase();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not lowercase.
  - isUpperCase
```
public SELF isUpperCase()
```
    Verifies that the actual CharSequence is a uppercase CharSequence by comparing it to an uppercase actual built with String.toUpperCase().
    Example :
```
 // assertions will pass
 assertThat("LEGO").isUpperCase();
 assertThat("").isUpperCase();
 assertThat(" ").isUpperCase();
 assertThat(".").isUpperCase();
 assertThat("7").isUpperCase();
 assertThat("A.7").isUpperCase();

 // assertions will fail
 assertThat("Lego").isUpperCase();
 assertThat("lego").isUpperCase();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not uppercase.

Class AbstractCharSequenceAssert<SELF extends AbstractCharSequenceAssert<SELF,ACTUAL>,ACTUAL extends CharSequence>

Field Summary

Fields inherited from class org.assertj.core.api.AbstractAssert

Constructor Summary

Method Summary

Methods inherited from class org.assertj.core.api.AbstractAssert

Methods inherited from class java.lang.Object

Constructor Detail

AbstractCharSequenceAssert

Method Detail

isNullOrEmpty

isEmpty

isNotEmpty

isBlank

isNotBlank

containsWhitespaces

containsOnlyWhitespaces

doesNotContainAnyWhitespaces

doesNotContainOnlyWhitespaces

isJavaBlank

isNotJavaBlank

hasSize

hasLineCount

hasSameSizeAs

hasSameSizeAs

hasSameSizeAs

isEqualToIgnoringCase

isNotEqualToIgnoringCase

containsOnlyDigits

containsOnlyOnce

contains

contains

containsSequence

containsSequence

containsSubsequence

containsSubsequence

containsIgnoringCase

doesNotContain

doesNotContain

doesNotContainPattern

doesNotContainPattern

startsWith

doesNotStartWith

endsWith

doesNotEndWith

matches

doesNotMatch

matches

doesNotMatch

isXmlEqualTo

isXmlEqualToContentOf

usingElementComparator

usingDefaultElementComparator

usingComparator

usingComparator

usingDefaultComparator

inHexadecimal

inUnicode

isEqualToIgnoringWhitespace

isNotEqualToIgnoringWhitespace

isEqualToNormalizingWhitespace

isNotEqualToNormalizingWhitespace

isSubstringOf

containsPattern

containsPattern

isEqualToNormalizingNewlines

isEqualToIgnoringNewLines

isLowerCase

isUpperCase