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How to use describeTo method of matchers.IsFailure class

Best Spectrum code snippet using matchers.IsFailure.describeTo

Source:VavrMatchers.java

...38				}39				return false;40			}41			@Override42			public void describeTo(Description description) {43				description.appendText("is an Option with a value");44			}45		};46	}47	/**48	 * Matches an Option containing no value49	 *50	 * @return A Hamcrest matcher51	 */52	@NotNull53	public static TypeSafeDiagnosingMatcher<Option<?>> isNone() {54		return isEmptyOption();55	}56	/**57	 * Matches an Option containing no value58	 *59	 * @return A Hamcrest matcher60	 */61	@NotNull62	public static TypeSafeDiagnosingMatcher<Option<?>> isEmptyOption() {63		return new TypeSafeDiagnosingMatcher<Option<?>>() {64			@Override65			protected boolean matchesSafely(Option<?> subject, Description mismatchDescription) {66				if (subject.isEmpty()) {67					return true;68				} else {69					mismatchDescription.appendText("is an Option with value ").appendValue(subject.get());70				}71				return false;72			}73			@Override74			public void describeTo(Description description) {75				description.appendText("is an empty Option");76			}77		};78	}79	/**80	 * Matches an Option containing the given value81	 *82	 * @param value The value that should be contained in the Option83	 * @param <T>   The type of value that should be in the Option84	 * @return A Hamcrest matcher85	 */86	@NotNull87	public static <T> TypeSafeDiagnosingMatcher<Option<T>> isSome(@NotNull T value) {88		return isDefinedOption(value);89	}90	/**91	 * Matches an Option containing the given value92	 *93	 * @param value The value that should be contained in the Option94	 * @param <T>   The type of value that should be in the Option95	 * @return A Hamcrest matcher96	 */97	@NotNull98	public static <T> TypeSafeDiagnosingMatcher<Option<T>> isDefinedOption(@NotNull T value) {99		return new TypeSafeDiagnosingMatcher<Option<T>>() {100			@Override101			protected boolean matchesSafely(Option<T> subject, Description mismatchDescription) {102				if (subject.isDefined()) {103					T actualValue = subject.get();104					if (value.equals(actualValue)) {105						return true;106					} else {107						mismatchDescription.appendText("value is ").appendValue(actualValue);108					}109				} else {110					mismatchDescription.appendText("is an empty Option");111				}112				return false;113			}114			@Override115			public void describeTo(Description description) {116				description.appendText("is an Option with a value equal to ").appendValue(value);117			}118		};119	}120	/**121	 * Matches an Option with a value matching the given Predicate122	 *123	 * @param predicateDescription Describes the predicate for user feedback124	 * @param predicate            The predicate to match125	 * @param <T>                  The type of value that should be in the Option126	 * @return A Hamcrest matcher127	 */128	@NotNull129	public static <T> TypeSafeDiagnosingMatcher<Option<T>> isDefinedOption(130			@NotNull String predicateDescription, @NotNull Predicate<T> predicate) {131		return new TypeSafeDiagnosingMatcher<Option<T>>() {132			@Override133			protected boolean matchesSafely(Option<T> subject, Description mismatchDescription) {134				if (subject.isDefined()) {135					if (predicate.test(subject.get())) {136						return true;137					} else {138						mismatchDescription.appendText("value does not match ").appendValue(predicateDescription)139								.appendText(", actual value: ").appendValue(subject.get());140					}141				} else {142					mismatchDescription.appendText("is an empty Option");143				}144				return false;145			}146			@Override147			public void describeTo(Description description) {148				description.appendText("is an Option with a value matching ").appendValue(predicateDescription);149			}150		};151	}152	// endregion153	// region Matchers for Either<L,R>154	/**155	 * Matches an Either that is a Left (error)156	 *157	 * @return A Hamcrest matcher158	 */159	@NotNull160	public static TypeSafeDiagnosingMatcher<Either<?, ?>> isLeft() {161		return new TypeSafeDiagnosingMatcher<Either<?, ?>>() {162			@Override163			protected boolean matchesSafely(Either<?, ?> subject, Description mismatchDescription) {164				if (subject.isLeft()) {165					return true;166				}167				mismatchDescription.appendText("is a right Either, with value ").appendValue(subject.get());168				return false;169			}170			@Override171			public void describeTo(Description description) {172				description.appendText("is a left Either");173			}174		};175	}176	/**177	 * Matches an Either that is a Left (error), with the given value178	 *179	 * @param expectedValue The expected value contained in the left180	 * @param <T>           The type contained in the Either181	 * @return A Hamcrest matcher182	 */183	@NotNull184	public static <T> TypeSafeDiagnosingMatcher<Either<T, ?>> isLeft(@NotNull T expectedValue) {185		return new TypeSafeDiagnosingMatcher<Either<T, ?>>() {186			@Override187			protected boolean matchesSafely(Either<T, ?> subject, Description mismatchDescription) {188				if (subject.isLeft()) {189					T actualValue = subject.getLeft();190					if (actualValue.equals(expectedValue)) {191						return true;192					} else {193						mismatchDescription.appendText("is a left Either, with value ").appendValue(actualValue);194					}195				} else {196					mismatchDescription.appendText("is a right Either, with value ").appendValue(subject.get());197				}198				return false;199			}200			@Override201			public void describeTo(Description description) {202				description.appendText("is a left Either, with value ").appendValue(expectedValue);203			}204		};205	}206	/**207	 * Matches a left Either with a value matching the given Predicate208	 *209	 * @param predicateDescription Describes the predicate for user feedback210	 * @param predicate            The predicate to match211	 * @param <T>                  The type of value that should be in the Either212	 * @return A Hamcrest matcher213	 */214	@NotNull215	public static <T> TypeSafeDiagnosingMatcher<Either<T, ?>> isLeft(216			@NotNull String predicateDescription, @NotNull Predicate<T> predicate) {217		return new TypeSafeDiagnosingMatcher<Either<T, ?>>() {218			@Override219			protected boolean matchesSafely(Either<T, ?> subject, Description mismatchDescription) {220				if (subject.isLeft()) {221					T actualValue = subject.getLeft();222					if (predicate.test(actualValue)) {223						return true;224					} else {225						mismatchDescription.appendText("is a left Either, not matching ")226								.appendValue(predicateDescription).appendText(", value ").appendValue(actualValue);227					}228				} else {229					mismatchDescription.appendText("is a right Either, with value ").appendValue(subject.get());230				}231				return false;232			}233			@Override234			public void describeTo(Description description) {235				description.appendText("is a left Either, matching ").appendValue(predicateDescription);236			}237		};238	}239	/**240	 * Matches an Either that is a Right (success)241	 *242	 * @return A Hamcrest matcher243	 */244	@NotNull245	public static TypeSafeDiagnosingMatcher<Either<?, ?>> isRight() {246		return new TypeSafeDiagnosingMatcher<Either<?, ?>>() {247			@Override248			protected boolean matchesSafely(Either<?, ?> subject, Description mismatchDescription) {249				if (subject.isRight()) {250					return true;251				}252				mismatchDescription.appendText("is a left Either, with value ").appendValue(subject.getLeft());253				return false;254			}255			@Override256			public void describeTo(Description description) {257				description.appendText("is a right Either");258			}259		};260	}261	/**262	 * Matches an Either that is a Right (success), with the given value263	 *264	 * @param expectedValue The expected value contained in the right265	 * @param <T>           The type contained in the Either266	 * @return A Hamcrest matcher267	 */268	@NotNull269	public static <T> TypeSafeDiagnosingMatcher<Either<?, T>> isRight(@NotNull T expectedValue) {270		return new TypeSafeDiagnosingMatcher<Either<?, T>>() {271			@Override272			protected boolean matchesSafely(Either<?, T> subject, Description mismatchDescription) {273				if (subject.isRight()) {274					T actualValue = subject.get();275					if (actualValue.equals(expectedValue)) {276						return true;277					} else {278						mismatchDescription.appendText("is a right Either, with value ").appendValue(actualValue);279					}280				} else {281					mismatchDescription.appendText("is a left Either, with value ").appendValue(subject.getLeft());282				}283				return false;284			}285			@Override286			public void describeTo(Description description) {287				description.appendText("is a right Either, with value ").appendValue(expectedValue);288			}289		};290	}291	/**292	 * Matches a right Either with a value matching the given Predicate293	 *294	 * @param predicateDescription Describes the predicate for user feedback295	 * @param predicate            The predicate to match296	 * @param <T>                  The type of value that should be in the Either297	 * @return A Hamcrest matcher298	 */299	@NotNull300	public static <T> TypeSafeDiagnosingMatcher<Either<?, T>> isRight(301			@NotNull String predicateDescription, @NotNull Predicate<T> predicate) {302		return new TypeSafeDiagnosingMatcher<Either<?, T>>() {303			@Override304			protected boolean matchesSafely(Either<?, T> subject, Description mismatchDescription) {305				if (subject.isRight()) {306					T actualValue = subject.get();307					if (predicate.test(actualValue)) {308						return true;309					} else {310						mismatchDescription.appendText("is a right Either, not matching ")311								.appendValue(predicateDescription).appendText(", value ").appendValue(actualValue);312					}313				} else {314					mismatchDescription.appendText("is a left Either, with value ").appendValue(subject.getLeft());315				}316				return false;317			}318			@Override319			public void describeTo(Description description) {320				description.appendText("is a right Either, matching ").appendValue(predicateDescription);321			}322		};323	}324	// endregion<L,R>325	// region Matchers for Try<T>326	/**327	 * Matches a Try that is a success328	 *329	 * @return A Hamcrest matcher330	 */331	@NotNull332	public static TypeSafeDiagnosingMatcher<Try<?>> isSuccess() {333		return new TypeSafeDiagnosingMatcher<Try<?>>() {334			@Override335			protected boolean matchesSafely(Try<?> subject, Description mismatchDescription) {336				if (subject.isSuccess()) {337					return true;338				}339				mismatchDescription.appendText("is a failure, with exception of type ")340						.appendValue(subject.getCause().getClass());341				return false;342			}343			@Override344			public void describeTo(Description description) {345				description.appendText("is a success");346			}347		};348	}349	/**350	 * A matcher for Try that is a success, and contains the given value351	 * @param expectedValue The expected value352	 * @return A Hamcrest matcher353	 * @param <T> The type of expected value354	 */355	@NotNull356	public static <T> TypeSafeDiagnosingMatcher<Try<T>> isSuccess(@NotNull T expectedValue) {357		return new TypeSafeDiagnosingMatcher<Try<T>>() {358			@Override359			protected boolean matchesSafely(Try<T> subject, Description mismatchDescription) {360				if (subject.isSuccess()) {361					T actualValue = subject.get();362					if (expectedValue.equals(actualValue)) {363						return true;364					}365					mismatchDescription.appendText("is a success, with value ")366							.appendValue(actualValue);367				} else {368					mismatchDescription.appendText("is a failure, with exception of type ")369							.appendValue(subject.getCause().getClass());370				}371				return false;372			}373			@Override374			public void describeTo(Description description) {375				description.appendText("is a success, with value ").appendValue(expectedValue);376			}377		};378	}379	/**380	 * Matches a Try that is a success, whose value matches the given predicate381	 * @param predicateDescription Describes the predicate for user feedback382	 * @param predicate            The predicate to match383	 * @return A Hamcrest matcher384	 * @param <T> The type of value in the try385	 */386	@NotNull387	public static <T> TypeSafeDiagnosingMatcher<Try<T>> isSuccess(@NotNull String predicateDescription, @NotNull Predicate<T> predicate) {388		return new TypeSafeDiagnosingMatcher<Try<T>>() {389			@Override390			protected boolean matchesSafely(Try<T> subject, Description mismatchDescription) {391				if (subject.isSuccess()) {392					T actualValue = subject.get();393					if (predicate.test(actualValue)) {394						return true;395					}396					mismatchDescription.appendText("is a success, which does not match ").appendValue(predicateDescription).appendText(", value ")397							.appendValue(actualValue);398				} else {399					mismatchDescription.appendText("is a failure, with exception of type ")400							.appendValue(subject.getCause().getClass());401				}402				return false;403			}404			@Override405			public void describeTo(Description description) {406				description.appendText("is a success, matching ").appendValue(predicateDescription);407			}408		};409	}410	/**411	 * Matches a Try that is a failure412	 *413	 * @return A Hamcrest matcher414	 */415	@NotNull416	public static TypeSafeDiagnosingMatcher<Try<?>> isFailure() {417		return new TypeSafeDiagnosingMatcher<Try<?>>() {418			@Override419			protected boolean matchesSafely(Try<?> subject, Description mismatchDescription) {420				if (subject.isFailure()) {421					return true;422				}423				mismatchDescription.appendText("is a success, with value ")424						.appendValue(subject.get());425				return false;426			}427			@Override428			public void describeTo(Description description) {429				description.appendText("is a failure");430			}431		};432	}433	/**434	 * Matches a Try that is a failure, containing the given exception435	 * @param expectedClass The class of the exception contained in the Try436	 * @return A Hamcrest matcher437	 * @param <T> The type of Throwable438	 */439	@NotNull440	public static <T extends Throwable> TypeSafeDiagnosingMatcher<Try<?>> isFailure(@NotNull Class<T> expectedClass) {441		return new TypeSafeDiagnosingMatcher<Try<?>>() {442			@Override443			protected boolean matchesSafely(Try<?> subject, Description mismatchDescription) {444				if (subject.isFailure()) {445					Throwable actualValue = subject.getCause();446					Class<? extends Throwable> actualClass = actualValue.getClass();447					if (expectedClass.isAssignableFrom(actualClass)) {448						return true;449					} else {450						mismatchDescription.appendText("is a failure, with exception of type ").appendValue(actualClass.getName());451					}452				} else {453					mismatchDescription.appendText("is a success, with value ")454							.appendValue(subject.get());455				}456				return false;457			}458			@Override459			public void describeTo(Description description) {460				description.appendText("is a failure, with exception of type ").appendValue(expectedClass.getName());461			}462		};463	}464	/**465	 * Matches a try that is a failure, the contained throwable of which matches the given predicate466	 * @param predicateDescription The description of the predicate467	 * @param predicate The predicate468	 * @return A HamCrest matcher469	 */470	@NotNull471	public static TypeSafeDiagnosingMatcher<Try<?>> isFailure(@NotNull String predicateDescription, @NotNull Predicate<Throwable> predicate) {472		return new TypeSafeDiagnosingMatcher<Try<?>>() {473			@Override474			protected boolean matchesSafely(Try<?> subject, Description mismatchDescription) {475				if (subject.isFailure()) {476					Throwable actualValue = subject.getCause();477					Class<? extends Throwable> actualClass = actualValue.getClass();478					if (predicate.test(actualValue)) {479						return true;480					} else {481						mismatchDescription.appendText("is a failure, not matching ").appendValue(predicateDescription).appendText(", and exception ").appendValue(actualClass.getName());482					}483				} else {484					mismatchDescription.appendText("is a success, with value ")485							.appendValue(subject.get());486				}487				return false;488			}489			@Override490			public void describeTo(Description description) {491				description.appendText("is a failure, with throwable matching ").appendValue(predicateDescription);492			}493		};494	}495	// endregion496	// region Internal497	/**498	 * Internal-use method for testing descriptions499	 *500	 * @param matcher The matcher to get the description of501	 * @return A String containing the Matcher's description502	 */503	static String descriptionOf(TypeSafeDiagnosingMatcher<?> matcher) {504		StringDescription description = new StringDescription();505		matcher.describeTo(description);506		return description.toString();507	}508	// endregion509}...

Source:TryMatchers.java

...29    }30    @Override protected boolean matchesSafely(Try<?> actual) {31      return actual.toEither().left().exists(subMatcher::matches);32    }33    @Override public void describeTo(Description description) {34      description.appendText("failure that ");35      subMatcher.describeTo(description);36    }37    @Override protected void describeMismatchSafely(Try<?> actual, Description mismatchDescription) {38      actual.fold(left -> {39        mismatchDescription.appendText("was failure that ");40        subMatcher.describeMismatch(left, mismatchDescription);41        return Unit();42      }, right -> {43        mismatchDescription.appendText("was successful");44        return Unit();45      });46    }47  }48  private static class SuccessfulMatcher<A> extends TypeSafeMatcher<Try<A>> {49    private final Matcher<? super A> subMatcher;50    private SuccessfulMatcher(Matcher<? super A> subMatcher) {51      this.subMatcher = subMatcher;52    }53    @Override protected boolean matchesSafely(Try<A> actual) {54      return actual.toEither().right().exists(subMatcher::matches);55    }56    @Override public void describeTo(Description description) {57      description.appendText("successful that ");58      subMatcher.describeTo(description);59    }60    @Override protected void describeMismatchSafely(Try<A> actual, Description mismatchDescription) {61      actual.fold(left -> {62        mismatchDescription.appendText("was failure");63        return Unit();64      }, right -> {65        mismatchDescription.appendText("was successful that ");66        subMatcher.describeMismatch(right, mismatchDescription);67        return Unit();68      });69    }70  }71}...

describeTo

Using AI Code Generation

1package com.example;2import org.hamcrest.Description;3import org.hamcrest.Matcher;4import org.hamcrest.StringDescription;5import org.junit.Test;6import static org.hamcrest.CoreMatchers.*;7import static org.junit.Assert.*;8public class IsFailureTest {9    public void testDescribeTo() {10        Matcher<String> matcher = containsString("Hello");11        StringDescription description = new StringDescription();12        matcher.describeTo(description);13        assertThat(description.toString(), equalTo("a string containing \"Hello\""));14    }15}

describeTo

Using AI Code Generation

1package org.hamcrest.examples;2import org.hamcrest.BaseMatcher;3import org.hamcrest.Description;4import org.hamcrest.Factory;5import org.hamcrest.Matcher;6public class IsFailure extends BaseMatcher<Object> {7    private final Matcher<Object> matcher;8    public IsFailure(Matcher<Object> matcher) {9        this.matcher = matcher;10    }11    public static Matcher<Object> isFailure(Matcher<Object> matcher) {12        return new IsFailure(matcher);13    }14    public boolean matches(Object o) {15        try {16            matcher.matches(o);17            return false;18        } catch (Throwable e) {19            return true;20        }21    }22    public void describeTo(Description description) {23        description.appendText("a failure of ").appendDescriptionOf(matcher);24    }25}26package org.hamcrest.examples;27import org.hamcrest.BaseMatcher;28import org.hamcrest.Description;29import org.hamcrest.Factory;30import org.hamcrest.Matcher;31public class IsFailure extends BaseMatcher<Object> {32    private final Matcher<Object> matcher;33    public IsFailure(Matcher<Object> matcher) {34        this.matcher = matcher;35    }36    public static Matcher<Object> isFailure(Matcher<Object> matcher) {37        return new IsFailure(matcher);38    }39    public boolean matches(Object o) {40        try {41            matcher.matches(o);42            return false;43        } catch (Throwable e) {44            return true;45        }46    }47    public void describeTo(Description description) {48        description.appendText("a failure of ").appendDescriptionOf(matcher);49    }50}51package org.hamcrest.examples;52import org.hamcrest.BaseMatcher;53import org.hamcrest.Description;54import org.hamcrest.Factory;55import org.hamcrest.Matcher;56public class IsFailure extends BaseMatcher<Object> {57    private final Matcher<Object> matcher;58    public IsFailure(Matcher<Object> matcher) {59        this.matcher = matcher;60    }61    public static Matcher<Object> isFailure(Matcher<Object> matcher) {62        return new IsFailure(matcher);63    }64    public boolean matches(Object o) {65        try {66            matcher.matches(o);67            return false;68        } catch (Throwable e) {69            return true;70        }71    }72    public void describeTo(Description description) {73        description.appendText("a failure of ").appendDescriptionOf(matcher);74    }75}76package org.hamcrest.examples;77import org.hamcrest.Base

describeTo

Using AI Code Generation

1package com.automationtestinghub;2import org.hamcrest.Description;3import org.hamcrest.Matcher;4import org.hamcrest.StringDescription;5import org.junit.Test;6import static org.hamcrest.CoreMatchers.is;7import static org.hamcrest.CoreMatchers.not;8import static org.junit.Assert.assertThat;9import static org.junit.Assert.fail;10public class IsFailureTest {11public void testDescribeTo() {12final Matcher<String> matcher = not(is("foo"));13final Description description = new StringDescription();14matcher.describeMismatch("bar", description);15assertThat(description.toString(), is("was \"bar\""));16}17}18Related Posts: Junit Test Case for is(String substring) metho

describeTo

Using AI Code Generation

1import org.hamcrest.*;2import org.hamcrest.core.*;3import org.hamcrest.text.*;4import org.hamcrest.beans.*;5import org.hamcrest.object.*;6import org.hamcrest.collection.*;7import org.hamcrest.number.*;8import org.hamcrest.date.*;9import org.hamcrest.xml.*;10import org.hamcrest.core.*;11import org.hamcrest.*;12import org.hamcrest.core.*;13import org.hamc

describeTo

Using AI Code Generation

1import org.hamcrest.*;2import static org.hamcrest.MatcherAssert.*;3import static org.hamcrest.Matchers.*;4public class 1 {5public static void main(String[] args) {6assertThat("abc", is("abcd"));7}8}9import org.hamcrest.*;10import static org.hamcrest.MatcherAssert.*;11import static org.hamcrest.Matchers.*;12public class 2 {13public static void main(String[] args) {14assertThat("abc", is("abcd"));15}16}17import org.hamcrest.*;18import static org.hamcrest.MatcherAssert.*;19import static org.hamcrest.Matchers.*;20public class 3 {21public static void main(String[] args) {22assertThat("abc", is("abcd"));23}24}25import org.hamcrest.*;26import static org.hamcrest.MatcherAssert.*;27import static org.hamcrest.Matchers.*;28public class 4 {29public static void main(String[] args) {30assertThat("abc", is("abcd"));31}32}

describeTo

Using AI Code Generation

1import org.hamcrest.*;2import static org.hamcrest.Matchers.*;3public class 1 {4    public static void main(String[] args) {5        MatcherAssert.assertThat("Hello", is("Hello"));6        MatcherAssert.assertThat("Hello", is("Hello1"));7    }8}9import org.hamcrest.*;10import static org.hamcrest.Matchers.*;11public class 2 {12    public static void main(String[] args) {13        MatcherAssert.assertThat("Hello", is("Hello"));14        MatcherAssert.assertThat("Hello", is("Hello1"));15    }16}17import org.hamcrest.*;18import static org.hamcrest.Matchers.*;19public class 3 {20    public static void main(String[] args) {21        MatcherAssert.assertThat("Hello", is("Hello"));22        MatcherAssert.assertThat("Hello", is("Hello1"));23    }24}25import org.hamcrest.*;26import static org.hamcrest.Matchers.*;27public class 4 {28    public static void main(String[] args) {29        MatcherAssert.assertThat("Hello", is("Hello"));30        MatcherAssert.assertThat("Hello", is("Hello1"));31    }32}33import org.hamcrest.*;34import static org.hamcrest.Matchers.*;35public class 5 {36    public static void main(String[] args) {37        MatcherAssert.assertThat("Hello", is("Hello"));38        MatcherAssert.assertThat("Hello", is("Hello1"));39    }40}41import org.hamcrest.*;42import static org.hamcrest.Matchers.*;43public class 6 {44    public static void main(String[] args) {45        MatcherAssert.assertThat("Hello", is("Hello"));46        MatcherAssert.assertThat("Hello", is("Hello

describeTo

Using AI Code Generation

1package org.hamcrest;2import org.hamcrest.core.Is;3import org.junit.Test;4public class IsFailureTest {5    public void testDescribeTo() {6        IsFailure isFailure = new IsFailure(new Is(1));7        System.out.println(isFailure.toString());8    }9}10public void testDescribeTo() {11    IsFailure isFailure = new IsFailure(new Is(1));12    System.out.println(isFailure.toString());13}

describeTo

Using AI Code Generation

1import org.hamcrest.*;2import org.hamcrest.core.*;3import org.hamcrest.text.*;4public class IsFailureExample {5   public static void main(String args[]) {6      Matcher m = IsEqual.equalTo("Hello");7      m.matches("Hello");8      System.out.println("Description of the matcher: " + IsFailure.describeTo(m));9   }10}11import org.hamcrest.*;12import org.hamcrest.core.*;13import org.hamcrest.text.*;14public class IsFailureExample {15   public static void main(String args[]) {16      Matcher m = IsEqual.equalTo("Hello");17      m.matches("World");18      System.out.println("Mismatch Description of the matcher: " + IsFailure.describeMismatch(m));19   }20}21import org.hamcrest.*;22import org.hamcrest.core.*;23import org.hamcrest.text.*;24public class IsFailureExample {25   public static void main(String args[]) {26      Matcher m = IsEqual.equalTo("Hello");27      m.matches("World");28      System.out.println("Mismatch Description of the matcher: " + IsFailure.describeMismatch(m));29   }30}31import org.hamcrest.*;32import org.hamcrest.core.*;33import org.hamcrest.text.*;34public class IsFailureExample {35   public static void main(String args[]) {36      Matcher m = IsEqual.equalTo("Hello");37      m.matches("World");38      System.out.println("Mismatch Description of the matcher: " + IsFailure.describeMismatch(m));39   }40}

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