AbstractCharSequenceAssert (AssertJ fluent assertions 3.6.2 API)

java.lang.Object
- org.assertj.core.api.AbstractAssert<S,A>
- - org.assertj.core.api.AbstractCharSequenceAssert<S,A>

Type Parameters:

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

A - the type of the "actual" value.

All Implemented Interfaces:

Assert<S,A>, Descriptable<S>, EnumerableAssert<S,Character>, ExtensionPoints<S,A>

Direct Known Subclasses:

CharSequenceAssert, StringAssert
```
public abstract class AbstractCharSequenceAssert<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
extends AbstractAssert<S,A>
implements EnumerableAssert<S,Character>
```
Base class for all implementations of assertions for CharSequences.

Author:

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

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

Constructor Summary

Constructors
Constructor and Description

AbstractCharSequenceAssert(A actual, Class<?> selfType)

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

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`S`	`contains(CharSequence... values)` Verifies that the actual `CharSequence` contains all the given values.
`S`	`contains(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` contains all the `CharSequence`s of the given Iterable.
`S`	`containsIgnoringCase(CharSequence sequence)` Verifies that the actual `CharSequence` contains the given sequence, ignoring case considerations.
`S`	`containsOnlyDigits()` Verifies that the actual `CharSequence` contains only digits.
`S`	`containsOnlyOnce(CharSequence sequence)` Verifies that the actual `CharSequence` contains the given sequence only once.
`S`	`containsPattern(CharSequence regex)` Verifies that the actual `CharSequence` contains the given regular expression.
`S`	`containsPattern(Pattern pattern)` Verifies that the actual `CharSequence` contains the given regular expression pattern.
`S`	`containsSequence(CharSequence... values)` Verifies that the actual `CharSequence` contains all the given values in the given order.
`S`	`containsSequence(Iterable<? extends CharSequence> values)` Verifies that the actual `CharSequence` contains all the values of the given Iterable in the Iterable iteration order.
`S`	`doesNotContain(CharSequence sequence)` Verifies that the actual `CharSequence` does not contain the given sequence.
`S`	`doesNotEndWith(CharSequence suffix)` Verifies that the actual `CharSequence` does not end with the given suffix.
`S`	`doesNotMatch(CharSequence regex)` Verifies that the actual `CharSequence` does not match the given regular expression.
`S`	`doesNotMatch(Pattern pattern)` Verifies that the actual `CharSequence` does not match the given regular expression pattern.
`S`	`doesNotStartWith(CharSequence prefix)` Verifies that the actual `CharSequence` does not start with the given prefix.
`S`	`endsWith(CharSequence suffix)` Verifies that the actual `CharSequence` ends with the given suffix.
`S`	`hasLineCount(int expectedLineCount)` Verifies that the actual `CharSequence` has the expected line count.
`S`	`hasSameSizeAs(CharSequence other)` Verifies that the actual `CharSequence` has a length that's the same as the length of the given `CharSequence`.
`S`	`hasSameSizeAs(Iterable<?> other)` Verifies that the actual `CharSequence` has a length that's the same as the number of elements in the given Iterable.
`S`	`hasSameSizeAs(Object other)` Verifies that the actual `CharSequence` has a length that's the same as the number of elements in the given array.
`S`	`hasSize(int expected)` Verifies that the actual `CharSequence` has the expected length using the `length()` method.
`S`	`inHexadecimal()` Use hexadecimal object representation instead of standard representation in error messages.
`S`	`inUnicode()` Use unicode character representation instead of standard representation in error messages.
`S`	`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`.
`S`	`isEqualToIgnoringCase(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one, ignoring case considerations.
`S`	`isEqualToIgnoringWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is equal to the given one, ignoring whitespace differences (mostly). To be exact, the following whitespace 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
`S`	`isJavaBlank()` Verifies that the actual `CharSequence` is blank, i.e.
`S`	`isNotBlank()` Verifies that the actual `CharSequence` is not blank, i.e.
`S`	`isNotEmpty()` Verifies that the actual `CharSequence` is not empty, i.e., is not `null` and has a length of 1 or more.
`S`	`isNotEqualToIgnoringCase(CharSequence expected)` Verifies that the actual `CharSequence` is not equal to the given one, ignoring case considerations.
`S`	`isNotEqualToIgnoringWhitespace(CharSequence expected)` Verifies that the actual `CharSequence` is not equal to the given one, ignoring whitespace differences (mostly). To be exact, the following whitespace 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
`S`	`isNotJavaBlank()` Verifies that the actual `CharSequence` is not blank, i.e.
`void`	`isNullOrEmpty()` Verifies that the actual `CharSequence` is empty, i.e., it has a length of 0, or is `null`.
`S`	`isSubstringOf(CharSequence sequence)` Verifies that the actual `CharSequence` is a substring of the given one (opposite assertion of `contains(CharSequence cs)`.
`S`	`isXmlEqualTo(CharSequence expectedXml)` Verifies that the actual `CharSequence` is equal to the given XML `CharSequence` after both have been formatted the same way.
`S`	`isXmlEqualToContentOf(File xmlFile)` Verifies that the actual `CharSequence` is equal to the content of the given file.
`S`	`matches(CharSequence regex)` Verifies that the actual `CharSequence` matches the given regular expression.
`S`	`matches(Pattern pattern)` Verifies that the actual `CharSequence` matches the given regular expression pattern.
`S`	`startsWith(CharSequence prefix)` Verifies that the actual `CharSequence` starts with the given prefix.
`S`	`usingComparator(Comparator<? super A> customComparator)` Use given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
`S`	`usingDefaultComparator()` Revert to standard comparison for incoming assertion checks.
`S`	`usingDefaultElementComparator()` Deprecated. Custom element Comparator is not supported for CharSequence comparison.
`S`	`usingElementComparator(Comparator<? super Character> customComparator)` Deprecated. Custom element Comparator is not supported for CharSequence comparison.

Methods inherited from class org.assertj.core.api.AbstractAssert
as, as, asList, asString, describedAs, describedAs, descriptionText, doesNotHave, doesNotHaveSameClassAs, equals, failWithMessage, getWritableAssertionInfo, has, hashCode, hasSameClassAs, hasToString, inBinary, is, isEqualTo, isExactlyInstanceOf, isIn, isIn, isInstanceOf, isInstanceOfAny, isInstanceOfSatisfying, isNot, isNotEqualTo, isNotExactlyInstanceOf, isNotIn, isNotIn, isNotInstanceOf, isNotInstanceOfAny, isNotNull, isNotOfAnyClassIn, isNotSameAs, isNull, isOfAnyClassIn, isSameAs, matches, matches, overridingErrorMessage, satisfies, setCustomRepresentation, throwAssertionError, withFailMessage, withRepresentation, withThreadDumpOnError

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

- Constructor Detail
  - AbstractCharSequenceAssert
```
public AbstractCharSequenceAssert(A 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<S extends AbstractCharSequenceAssert<S,A>,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<S extends AbstractCharSequenceAssert<S,A>,Character>
    
    Throws:
    
    AssertionError - if the actual CharSequence has a non-zero length or is null.
  - isNotEmpty
```
public S 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<S extends AbstractCharSequenceAssert<S,A>,Character>
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is empty (has a length of 0).
  - isBlank
```
public S isBlank()
```
    Verifies that the actual CharSequence is blank, i.e. is not null or empty and contains only whitespace characters.
    The whitespace definition used in this assertion follows the latest Unicode standard (which is not the same as Java whitespace definition) and is based on Guava CharMatcher#whitespace. If you want to stick with Java whitespace definition, use isJavaBlank().
    These assertions will succeed:
```
 assertThat(" ").isBlank();
 assertThat("     ").isBlank();
```
    Whereas these assertions will fail:
```
 assertThat("a").isBlank();
 assertThat(" b").isBlank();
 assertThat("").isBlank();
 String nullString = null;
 assertThat(nullString).isNotBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - isNotBlank
```
public S isNotBlank()
```
    Verifies that the actual CharSequence is not blank, i.e. either is null, empty or contains at least one whitespace characters.
    It uses the same whitespace definition as in isBlank() assertion.
    These assertion will succeed:
```
 assertThat("a").isNotBlank();
 assertThat(" b").isNotBlank();
 assertThat(" c ").isNotBlank();
 assertThat("").isNotBlank();
 String nullString = null;
 assertThat(nullString).isNotBlank();
```
    Whereas these assertions will fail:
```
 assertThat(" ").isNotBlank();
 assertThat("    ").isNotBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - isJavaBlank
```
public S isJavaBlank()
```
    Verifies that the actual CharSequence is blank, i.e. it contains only whitespace characters (according to Character.isWhitespace(char)).
    If you want to use the latest Unicode standard whitespace definition (as in Guava), use isBlank(), see Guava explanation for more details.
    These assertions will succeed:
```
 assertThat(" ").isBlank();
 assertThat("     ").isBlank();
```
    Whereas these assertions will fail:
```
 assertThat("a").isBlank();
 assertThat(" b").isBlank();
 assertThat("").isBlank(); 
 String nullString = null;
 assertThat(nullString).isBlank(); 
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is not blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - isNotJavaBlank
```
public S isNotJavaBlank()
```
    Verifies that the actual CharSequence is not blank, i.e. either is null, empty or contains at least one whitespace characters (according to Character.isWhitespace(char)).
    It uses the same whitespace definition as in isJavaBlank() assertion.
    These assertion will succeed:
```
 assertThat("a").isNotBlank();
 assertThat(" b").isNotBlank();
 assertThat(" c ").isNotBlank();
 assertThat("").isNotBlank();
 String nullString = null;
 assertThat(nullString).isNotBlank();
```
    Whereas these assertions will fail:
```
 assertThat(" ").isNotBlank();
 assertThat("   ").isNotBlank();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence is blank.
    
    Since:
    
    2.6.0 / 3.6.0
  - hasSize
```
public S 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<S extends AbstractCharSequenceAssert<S,A>,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 S 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 S 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 S 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<S extends AbstractCharSequenceAssert<S,A>,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 S 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<S extends AbstractCharSequenceAssert<S,A>,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 S 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 S 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 S 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 this assertion fails:
```
 assertThat("10$").containsOnlyDigits();
 assertThat("").containsOnlyDigits();
```
    Returns:
    
    this assertion object.
    
    Throws:
    
    AssertionError - if the actual CharSequence contains non-digit characters or is null.
  - containsOnlyOnce
```
public S 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 S 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 S 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 strings.
  - containsSequence
```
public S containsSequence(CharSequence... values)
```
    Verifies that the actual CharSequence contains all the given values in the given order.
    Note that unlike IterableAssert.containsSequence(Object...), the assertion will succeed when there are values between the expected sequence values.
    Example:
```
 String book = "{ 'title':'A Game of Thrones', 'author':'George Martin'}";
 
 // this assertions succeeds
 assertThat(book).containsSequence("'title'", ":", "'A Game of Thrones'");
 
 // this one too even if there are values between the expected sequence (e.g "'title':'") 
 assertThat(book).containsSequence("{", "A Game of Thrones", "George Martin", "}");
 
 // this one fails as "author" must come after "A Game of Thrones"
 assertThat(book).containsSequence("{", "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 strings in the given order.
  - containsSequence
```
public S containsSequence(Iterable<? extends CharSequence> values)
```
    Verifies that the actual CharSequence contains all the values of the given Iterable in the Iterable iteration order.
    Note that unlike IterableAssert.containsSequence(Object...), the assertion will succeed when there are values between the expected 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 one too even if there are values between the expected sequence (e.g "'title':'") 
 assertThat(book).containsSequence(asList("{", "A Game of Thrones", "George Martin", "}"));

 // but this one fails as "author" must come after "A Game of Thrones"
 assertThat(book).containsSequence(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 strings in the given order.
  - containsIgnoringCase
```
public S 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 S doesNotContain(CharSequence sequence)
```
    Verifies that the actual CharSequence does not contain the given sequence.
    Example :
```
 // assertion will pass
 assertThat("Frodo").doesNotContain("fro");
 assertThat("Frodo").doesNotContain("gandalf");
 
 // assertion will fail
 assertThat("Frodo").doesNotContain("Fro");
```
    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 contains the given one.
  - startsWith
```
public S 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 S 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 S 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 S 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 S 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 S 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 S 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 S 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 S 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 S 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 S 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<S extends AbstractCharSequenceAssert<S,A>,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 S usingDefaultElementComparator()
```
    Deprecated. Custom element Comparator is not supported for CharSequence comparison.
    
    Do not use this method.
    
    Specified by:
    
    usingDefaultElementComparator in interface EnumerableAssert<S extends AbstractCharSequenceAssert<S,A>,Character>
    
    Returns:
    
    this assertion object.
    
    Throws:
    
    UnsupportedOperationException - if this method is called.
  - usingComparator
```
public S usingComparator(Comparator<? super A> customComparator)
```
    Description copied from class: AbstractAssert
    Use given custom comparator instead of relying on actual type A equals method for incoming assertion checks.
    Custom comparator is bound to assertion instance, meaning that if a new assertion is created, it will use default comparison strategy. 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<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
    
    Overrides:
    
    usingComparator in class AbstractAssert<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
    
    Parameters:
    
    customComparator - the comparator to use for incoming assertion checks.
    
    Returns:
    
    this assertion object.
  - usingDefaultComparator
```
public S usingDefaultComparator()
```
    Description copied from class: AbstractAssert
    
    Revert to standard comparison for incoming assertion checks.
    This method should be used to disable a custom comparison strategy set by calling Assert.usingComparator(Comparator).
    
    Specified by:
    
    usingDefaultComparator in interface Assert<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
    
    Overrides:
    
    usingDefaultComparator in class AbstractAssert<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
    
    Returns:
    
    this assertion object.
  - inHexadecimal
```
public S 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<S extends AbstractCharSequenceAssert<S,A>,A extends CharSequence>
    
    Returns:
    
    this assertion object.
  - inUnicode
```
public S 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 S isEqualToIgnoringWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is equal to the given one, ignoring whitespace differences (mostly).
    To be exact, the following whitespace 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 :
```
 // assertion will pass
 assertThat("my      foo bar").isEqualToIgnoringWhitespace("my foo bar");
 assertThat("  my foo bar  ").isEqualToIgnoringWhitespace("my foo bar");
 assertThat(" my     foo bar ").isEqualToIgnoringWhitespace("my foo bar");
 assertThat(" my\tfoo bar ").isEqualToIgnoringWhitespace(" my foo bar");
 assertThat("my foo bar").isEqualToIgnoringWhitespace("   my foo bar   ");

 // assertion will fail
 assertThat(" my\tfoo bar ").isEqualToIgnoringWhitespace(" my foobar");
```
    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 S isNotEqualToIgnoringWhitespace(CharSequence expected)
```
    Verifies that the actual CharSequence is not equal to the given one, ignoring whitespace differences (mostly).
    To be exact, the following whitespace 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 :
```
 // assertion will pass
 assertThat(" my\tfoo").isNotEqualToIgnoringWhitespace(" my bar");
 assertThat(" my\tfoo bar ").isNotEqualToIgnoringWhitespace(" my foobar");

 // assertion 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.
  - isSubstringOf
```
public S 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 S 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 S 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.

Class AbstractCharSequenceAssert<S extends AbstractCharSequenceAssert<S,A>,A 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

isJavaBlank

isNotJavaBlank

hasSize

hasLineCount

hasSameSizeAs

hasSameSizeAs

hasSameSizeAs

isEqualToIgnoringCase

isNotEqualToIgnoringCase

containsOnlyDigits

containsOnlyOnce

contains

contains

containsSequence

containsSequence

containsIgnoringCase

doesNotContain

startsWith

doesNotStartWith

endsWith

doesNotEndWith

matches

doesNotMatch

matches

doesNotMatch

isXmlEqualTo

isXmlEqualToContentOf

usingElementComparator

usingDefaultElementComparator

usingComparator

usingDefaultComparator

inHexadecimal

inUnicode

isEqualToIgnoringWhitespace

isNotEqualToIgnoringWhitespace

isSubstringOf

containsPattern

containsPattern