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How to use TypeSafeDiagnosingMatcher class of org.hamcrest package

Best junit code snippet using org.hamcrest.TypeSafeDiagnosingMatcher

Source:ValidationErrorMatchers.java

...5import java.util.List;6import java.util.Objects;7import org.hamcrest.Description;8import org.hamcrest.Matcher;9import org.hamcrest.TypeSafeDiagnosingMatcher;10import org.hamcrest.core.IsCollectionContaining;11import io.vertx.core.json.JsonObject;12public class ValidationErrorMatchers {13  public static TypeSafeDiagnosingMatcher<JsonObject> hasErrorWith(Matcher<JsonObject> matcher) {14    return new TypeSafeDiagnosingMatcher<JsonObject>() {15      @Override16      public void describeTo(Description description) {17        description18          .appendText("Validation error which ").appendDescriptionOf(matcher);19      }20      @Override21      protected boolean matchesSafely(JsonObject representation, Description description) {22        final List<JsonObject> errors = toList(representation, "errors");23        if(errors.isEmpty()) {24          description.appendText("errors array is empty");25          return false;26        }27        final Matcher<Iterable<? super JsonObject>> iterableMatcher28          = IsCollectionContaining.hasItem(matcher);29        iterableMatcher.describeMismatch(errors, description);30        return iterableMatcher.matches(errors);31      }32    };33  }34  public static TypeSafeDiagnosingMatcher<JsonObject> hasParameter(35    String key,36    String value) {37    return new TypeSafeDiagnosingMatcher<JsonObject>() {38      @Override39      public void describeTo(Description description) {40        description.appendText("has parameter with key ").appendValue(key)41          .appendText(" and value ").appendValue(value);42      }43      @Override44      protected boolean matchesSafely(JsonObject error, Description description) {45        final List<JsonObject> parameters = toList(error, "parameters");46        final boolean hasParameter = hasParameter(parameters, key, value);47        if(!hasParameter) {48          if(!hasParameter(parameters, key)) {49            description.appendText("does not have parameter ")50              .appendValue(key);51          }52          else {53            description.appendText("parameter has value ")54              .appendValue(getParameter(parameters, key));55          }56        }57        return hasParameter;58      }59    };60  }61  private static String getParameter(List<JsonObject> parameters, String key) {62    return parameters.stream().filter(parameter ->63        Objects.equals(parameter.getString("key"), key))64      .findFirst()65      .map(parameter -> parameter.getString("value"))66      .orElse(null);67  }68  private static boolean hasParameter(List<JsonObject> parameters, String key) {69    return parameters.stream().anyMatch(parameter ->70      Objects.equals(parameter.getString("key"), key));71  }72  private static boolean hasParameter(List<JsonObject> parameters, String key, String value) {73    return parameters.stream().anyMatch(parameter ->74      Objects.equals(parameter.getString("key"), key)75        && Objects.equals(parameter.getString("value"), value));76  }77  public static TypeSafeDiagnosingMatcher<JsonObject> hasMessage(String message) {78    return new TypeSafeDiagnosingMatcher<JsonObject>() {79      @Override80      public void describeTo(Description description) {81        description.appendText("has message ").appendValue(message);82      }83      @Override84      protected boolean matchesSafely(JsonObject error, Description description) {85        final Matcher<String> matcher = is(message);86        matcher.describeMismatch(error, description);87        return matcher.matches(error.getString("message"));88      }89    };90  }91  public static TypeSafeDiagnosingMatcher<JsonObject> hasMessageContaining(String message) {92    return new TypeSafeDiagnosingMatcher<JsonObject>() {93      @Override94      public void describeTo(Description description) {95        description.appendText("has message containing ").appendValue(message);96      }97      @Override98      protected boolean matchesSafely(JsonObject error, Description description) {99        final Matcher<String> matcher = containsString(message);100        matcher.describeMismatch(error, description);101        return matcher.matches(error.getString("message"));102      }103    };104  }105}...

Source:OkapiResponseStatusCodeMatchers.java

...9import static org.hamcrest.CoreMatchers.is;10import org.folio.rest.support.TextResponse;11import org.hamcrest.Description;12import org.hamcrest.Matcher;13import org.hamcrest.TypeSafeDiagnosingMatcher;14public class OkapiResponseStatusCodeMatchers {15  /** HTTP Status-Code 200: Ok. */16  public static Matcher<Integer> isOk() {17    return is(HTTP_OK.toInt());18  }19  /** HTTP Status-Code 201: Created. */20  public static Matcher<Integer> isCreated() {21    return is(HTTP_CREATED.toInt());22  }23  /** HTTP Status-Code 204: No content. */24  public static Matcher<Integer> isNoContent() {25    return is(HTTP_NO_CONTENT.toInt());26  }27  /** HTTP Status-Code 400: Bad request. */28  public static Matcher<Integer> isBadRequest() {29    return is(HTTP_BAD_REQUEST.toInt());30  }31  /** HTTP Status-Code 404: Not Found. */32  public static Matcher<Integer> isNotFound() {33    return is(HTTP_NOT_FOUND.toInt());34  }35  /** HTTP Status-Code 422: Unprocessable entity. */36  public static Matcher<Integer> isUnprocessableEntity() {37    return is(HTTP_UNPROCESSABLE_ENTITY.toInt());38  }39  /** HTTP Status-Code 500: Internal server error. */40  public static Matcher<Integer> isInternalServerError() {41    return is(HTTP_INTERNAL_SERVER_ERROR.toInt());42  }43  /** HTTP Status-Code 200: Ok. */44  public static TypeSafeDiagnosingMatcher<TextResponse> matchesOk() {45    return hasStatusCode(HTTP_OK.toInt());46  }47  /** HTTP Status-Code 201: Created. */48  public static TypeSafeDiagnosingMatcher<TextResponse> matchesCreated() {49    return hasStatusCode(HTTP_CREATED.toInt());50  }51  /** HTTP Status-Code 204: No content. */52  public static TypeSafeDiagnosingMatcher<TextResponse> matchesNoContent() {53    return hasStatusCode(HTTP_NO_CONTENT.toInt());54  }55  /** HTTP Status-Code 400: Bad request. */56  public static TypeSafeDiagnosingMatcher<TextResponse> matchesBadRequest() {57    return hasStatusCode(HTTP_BAD_REQUEST.toInt());58  }59  /** HTTP Status-Code 404: Not Found. */60  public static TypeSafeDiagnosingMatcher<TextResponse> matchesNotFound() {61    return hasStatusCode(HTTP_NOT_FOUND.toInt());62  }63  /** HTTP Status-Code 422: Unprocessable entity. */64  public static TypeSafeDiagnosingMatcher<TextResponse> matchesUnprocessableEntity() {65    return hasStatusCode(HTTP_UNPROCESSABLE_ENTITY.toInt());66  }67  /** HTTP Status-Code 500: Internal server error. */68  public static TypeSafeDiagnosingMatcher<TextResponse> matchInternalServerError() {69    return hasStatusCode(HTTP_INTERNAL_SERVER_ERROR.toInt());70  }71  private static TypeSafeDiagnosingMatcher<TextResponse> hasStatusCode(Integer statusCode) {72    return new TypeSafeDiagnosingMatcher<TextResponse>() {73      @Override74      public void describeTo(Description description) {75        description.appendText("a response with status code ")76          .appendValue(statusCode);77      }78      @Override79      protected boolean matchesSafely(TextResponse response, Description description) {80        final Matcher<Integer> statusCodeMatcher = is(statusCode);81        statusCodeMatcher.describeMismatch(response.getStatusCode(), description);82        final boolean matches = statusCodeMatcher.matches(response.getStatusCode());83        if(!matches) {84          description.appendText("\nReceived body: ").appendValue(response.getBody());85        }86        return matches;...

Source:TokenMatchers.java

...17package org.apache.commons.csv;18import static org.hamcrest.core.AllOf.allOf;19import org.hamcrest.Description;20import org.hamcrest.Matcher;21import org.hamcrest.TypeSafeDiagnosingMatcher;22/**23 * Collection of matchers for asserting the type and content of tokens.24 */25final class TokenMatchers {26    public static Matcher<Token> hasContent(final String expectedContent) {27        return new TypeSafeDiagnosingMatcher<Token>() {28            @Override29            public void describeTo(final Description description) {30                description.appendText("token has content ");31                description.appendValue(expectedContent);32            }33            @Override34            protected boolean matchesSafely(final Token item,35                    final Description mismatchDescription) {36                mismatchDescription.appendText("token content is ");37                mismatchDescription.appendValue(item.content.toString());38                return expectedContent.equals(item.content.toString());39            }40        };41    }42    public static Matcher<Token> hasType(final Token.Type expectedType) {43        return new TypeSafeDiagnosingMatcher<Token>() {44            @Override45            public void describeTo(final Description description) {46                description.appendText("token has type ");47                description.appendValue(expectedType);48            }49            @Override50            protected boolean matchesSafely(final Token item,51                    final Description mismatchDescription) {52                mismatchDescription.appendText("token type is ");53                mismatchDescription.appendValue(item.type);54                return item.type == expectedType;55            }56        };57    }58    public static Matcher<Token> isReady() {59        return new TypeSafeDiagnosingMatcher<Token>() {60            @Override61            public void describeTo(final Description description) {62                description.appendText("token is ready ");63            }64            @Override65            protected boolean matchesSafely(final Token item,66                    final Description mismatchDescription) {67                mismatchDescription.appendText("token is not ready ");68                return item.isReady;69            }70        };71    }72    public static Matcher<Token> matches(final Token.Type expectedType, final String expectedContent) {73        return allOf(hasType(expectedType), hasContent(expectedContent));...

Source:HttpResponseStatusCodeMatchers.java

...9import static org.hamcrest.CoreMatchers.is;10import org.folio.rest.support.TextResponse;11import org.hamcrest.Description;12import org.hamcrest.Matcher;13import org.hamcrest.TypeSafeDiagnosingMatcher;14public class HttpResponseStatusCodeMatchers {15  /** HTTP Status-Code 404: Not Found. */16  public static TypeSafeDiagnosingMatcher<TextResponse> isNotFound() {17    return hasStatusCode(HTTP_NOT_FOUND);18  }19  /** HTTP Status-Code 422: Unprocessable entity. */20  public static TypeSafeDiagnosingMatcher<TextResponse> isUnprocessableEntity() {21    return hasStatusCode(UNPROCESSABLE_ENTITY);22  }23  /** HTTP Status-Code 204: No content. */24  public static TypeSafeDiagnosingMatcher<TextResponse> isNoContent() {25    return hasStatusCode(HTTP_NO_CONTENT);26  }27  /** HTTP Status-Code 201: Created. */28  public static TypeSafeDiagnosingMatcher<TextResponse> isCreated() {29    return hasStatusCode(HTTP_CREATED);30  }31  /** HTTP Status-Code 200: Ok. */32  public static TypeSafeDiagnosingMatcher<TextResponse> isOk() {33    return hasStatusCode(HTTP_OK);34  }35  /** HTTP Status-Code 400: Bad request. */36  public static TypeSafeDiagnosingMatcher<TextResponse> isBadRequest() {37    return hasStatusCode(HTTP_BAD_REQUEST);38  }39  /** HTTP Status-Code 500: Internal server error. */40  public static TypeSafeDiagnosingMatcher<TextResponse> isInternalServerError() {41    return hasStatusCode(HTTP_INTERNAL_ERROR);42  }43  private static TypeSafeDiagnosingMatcher<TextResponse> hasStatusCode(Integer statusCode) {44    return new TypeSafeDiagnosingMatcher<TextResponse>() {45      @Override46      public void describeTo(Description description) {47        description.appendText("a response with status code ")48          .appendValue(statusCode);49      }50      @Override51      protected boolean matchesSafely(TextResponse response, Description description) {52        final Matcher<Integer> statusCodeMatcher = is(statusCode);53        statusCodeMatcher.describeMismatch(response.getStatusCode(), description);54        final boolean matches = statusCodeMatcher.matches(response.getStatusCode());55        if(!matches) {56          description.appendText("\nReceived body: ").appendValue(response.getBody());57        }58        return matches;...

Source:LoanMatchers.java

1package org.folio.rest.support.matchers;2import static org.hamcrest.CoreMatchers.is;3import org.hamcrest.Description;4import org.hamcrest.Matcher;5import org.hamcrest.TypeSafeDiagnosingMatcher;6import io.vertx.core.json.JsonObject;7public class LoanMatchers {8  public static TypeSafeDiagnosingMatcher<JsonObject> isOpen() {9    return hasStatus("Open");10  }11  public static TypeSafeDiagnosingMatcher<JsonObject> isClosed() {12    return hasStatus("Closed");13  }14  public static TypeSafeDiagnosingMatcher<JsonObject> isAnonymized() {15    return doesNotHaveUserId();16  }17  static TypeSafeDiagnosingMatcher<JsonObject> hasStatus(String status) {18    return new TypeSafeDiagnosingMatcher<JsonObject>() {19      @Override public void describeTo(Description description) {20        description.appendText("Loan should have a status of ")21          .appendText(status);22      }23      @Override protected boolean matchesSafely(JsonObject representation,24        Description description) {25        if (!representation.containsKey("status")) {26          description.appendText("has no status property");27          return false;28        }29        final Matcher<String> statusMatcher = is(status);30        final String statusName = representation31          .getJsonObject("status")32          .getString("name");33        statusMatcher.describeMismatch(statusName, description);34        return statusMatcher.matches(statusName);35      }36    };37  }38  static TypeSafeDiagnosingMatcher<JsonObject> doesNotHaveUserId() {39    return new TypeSafeDiagnosingMatcher<JsonObject>() {40      @Override public void describeTo(Description description) {41        description.appendText("Anonymized loan should not have a userId");42      }43      @Override protected boolean matchesSafely(JsonObject representation,44        Description description) {45        return !representation.containsKey("userId");46      }47    };48  }49}...

Source:Every.java

1package org.hamcrest.core;2import org.hamcrest.Description;3import org.hamcrest.Matcher;4import org.hamcrest.TypeSafeDiagnosingMatcher;5public class Every<T> extends TypeSafeDiagnosingMatcher<Iterable<? extends T>> {6    private final Matcher<? super T> matcher;7    /* JADX DEBUG: Failed to find minimal casts for resolve overloaded methods, cast all args instead8     method: MutableMD:(java.lang.Iterable, org.hamcrest.Description):boolean9     arg types: [java.lang.Iterable<? extends T>, org.hamcrest.Description]10     candidates:11      org.hamcrest.core.Every.matchesSafely(java.lang.Object, org.hamcrest.Description):boolean12      MutableMD:(java.lang.Object, org.hamcrest.Description):boolean13      MutableMD:(java.lang.Iterable, org.hamcrest.Description):boolean */14    @Override // org.hamcrest.TypeSafeDiagnosingMatcher15    public /* bridge */ /* synthetic */ boolean matchesSafely(Object obj, Description description) {16        return matchesSafely((Iterable) ((Iterable) obj), description);17    }18    public Every(Matcher<? super T> matcher2) {19        this.matcher = matcher2;20    }21    public boolean matchesSafely(Iterable<? extends T> collection, Description mismatchDescription) {22        for (T t : collection) {23            if (!this.matcher.matches(t)) {24                mismatchDescription.appendText("an item ");25                this.matcher.describeMismatch(t, mismatchDescription);26                return false;27            }28        }...

Source:ValidationResponseMatchers.java

2import io.vertx.core.json.JsonObject;3import org.folio.support.Response;4import org.hamcrest.Description;5import org.hamcrest.Matcher;6import org.hamcrest.TypeSafeDiagnosingMatcher;7import static org.folio.support.matchers.ValidationErrorMatchers.hasErrorWith;8import static org.hamcrest.CoreMatchers.is;9public class ValidationResponseMatchers {10  public static TypeSafeDiagnosingMatcher<Response> isValidationErrorWith(Matcher<JsonObject> errorMatcher) {11    return new TypeSafeDiagnosingMatcher<Response>() {12      @Override13      public void describeTo(Description description) {14        description15          .appendText("A response with status code 422 and an error which ")16          .appendDescriptionOf(errorMatcher);17      }18      @Override19      protected boolean matchesSafely(Response response, Description description) {20        final Matcher<Integer> statusCodeMatcher = is(422);21        if(!statusCodeMatcher.matches(response.getStatusCode())) {22          statusCodeMatcher.describeMismatch(response.getStatusCode(), description);23          return false;24        }25        final TypeSafeDiagnosingMatcher<JsonObject> validationErrorsMatcher26          = hasErrorWith(errorMatcher);27        final JsonObject body = response.getBodyAsJson();28        validationErrorsMatcher.describeMismatch(body, description);29        return validationErrorsMatcher.matches(body);30      }31    };32  }33}...

Source:TypeSafeDiagnosingMatcher.java

1package org.hamcrest;2import org.hamcrest.Description;3import org.hamcrest.internal.ReflectiveTypeFinder;4public abstract class TypeSafeDiagnosingMatcher<T> extends BaseMatcher<T> {5    private static final ReflectiveTypeFinder TYPE_FINDER = new ReflectiveTypeFinder("matchesSafely", 2, 0);6    private final Class<?> expectedType;7    /* access modifiers changed from: protected */8    public abstract boolean matchesSafely(T t, Description description);9    protected TypeSafeDiagnosingMatcher(Class<?> expectedType2) {10        this.expectedType = expectedType2;11    }12    protected TypeSafeDiagnosingMatcher(ReflectiveTypeFinder typeFinder) {13        this.expectedType = typeFinder.findExpectedType(getClass());14    }15    protected TypeSafeDiagnosingMatcher() {16        this(TYPE_FINDER);17    }18    @Override // org.hamcrest.Matcher19    public final boolean matches(Object item) {20        return item != null && this.expectedType.isInstance(item) && matchesSafely(item, new Description.NullDescription());21    }22    @Override // org.hamcrest.BaseMatcher, org.hamcrest.Matcher23    public final void describeMismatch(Object item, Description mismatchDescription) {24        if (item == null || !this.expectedType.isInstance(item)) {25            super.describeMismatch(item, mismatchDescription);26        } else {27            matchesSafely(item, mismatchDescription);28        }29    }...

TypeSafeDiagnosingMatcher

Using AI Code Generation

1TypeSafeDiagnosingMatcher<String> matcher = new TypeSafeDiagnosingMatcher<String>() {2    protected boolean matchesSafely(String item, Description mismatchDescription) {3        return false;4    }5    public void describeTo(Description description) {6    }7};

TypeSafeDiagnosingMatcher

Using AI Code Generation

1import org.hamcrest.Description2import org.hamcrest.Matcher3import org.hamcrest.TypeSafeDiagnosingMatcher4import org.hamcrest.core.IsNot.not5class IsEvenMatcher : TypeSafeDiagnosingMatcher<Int>() {6    override fun describeTo(description: Description?) {7        description?.appendText("an even number")8    }9    override fun matchesSafely(item: Int, mismatchDescription: Description?): Boolean {10        return if (item % 2 == 0) {11        } else {12            mismatchDescription?.appendText("was ")?.appendValue(item)13        }14    }15}16fun isEven(): Matcher<Int> = IsEvenMatcher()17fun isNotEven(): Matcher<Int> = not(isEven())18assertThat(2, isEven())19assertThat(3, isNotEven())

TypeSafeDiagnosingMatcher

Using AI Code Generation

1import org.hamcrest.TypeSafeDiagnosingMatcher2import org.hamcrest.Description3import org.hamcrest.Matcher4class MyMatcher extends TypeSafeDiagnosingMatcher<String> {5    def matchesSafely(item, description) {6        description.appendText('MyMatcher')7        if (item == 'test') {8        }9    }10}11def myMatcher = new MyMatcher()12assertThat 'test', myMatcher.describeMismatch('test', new StringDescription())13import org.hamcrest.TypeSafeMatcher14import org.hamcrest.Description15import org.hamcrest.Matcher16class MyMatcher extends TypeSafeMatcher<String> {17    def matchesSafely(item) {18        if (item == 'test') {19        }20    }21    def describeTo(description) {22        description.appendText('MyMatcher')23    }24}25def myMatcher = new MyMatcher()26assertThat 'test', myMatcher.describeMismatch('test', new StringDescription())27import org.hamcrest.BaseMatcher28import org.hamcrest.Description29import org.hamcrest.Matcher30class MyMatcher extends BaseMatcher<String> {31    def matches(item) {32        if (item == 'test') {33        }34    }35    def describeTo(description) {36        description.appendText('MyMatcher')37    }38}39def myMatcher = new MyMatcher()40assertThat 'test', myMatcher.describeMismatch('test', new StringDescription())41import org.hamcrest.CustomMatcher42import org.hamcrest.Description43import org.hamcrest.Matcher44def myMatcher = new CustomMatcher('MyMatcher', { item ->45    if (item == 'test') {46    }47})48assertThat 'test', myMatcher.describeMismatch('test', new StringDescription())49import org.hamcrest.CustomTypeSafeMatcher50import org.hamcrest.Description51import org.hamcrest.Matcher52def myMatcher = new CustomTypeSafeMatcher('MyMatcher', { item, description ->53    description.appendText('MyMatcher')54    if (item == 'test') {

TypeSafeDiagnosingMatcher

Using AI Code Generation

1    [javac] import org.hamcrest.TypeSafeDiagnosingMatcher;2    [javac] import org.hamcrest.Description;3    [javac] import org.hamcrest.Matcher;4    [javac] import org.hamcrest.TypeSafeMatcher;5    [javac] import org.hamcrest.core.IsEqual;6    [javac] import org.hamcrest.core.IsNot;7    [javac] import org.hamcrest.core.IsNull;8    [javac] import org.hamcrest.core.IsSame

TypeSafeDiagnosingMatcher

Using AI Code Generation

1import org.hamcrest.TypeSafeDiagnosingMatcher2import org.hamcrest.Description3import org.hamcrest.Matcher4import org.hamcrest.MatcherAssert5import org.hamcrest.Matchers6import org.hamcrest.StringDescription7import org.junit.Test8public class TypeSafeDiagnosingMatcherTest {9    public void testTypeSafeDiagnosingMatcher() {10        TypeSafeDiagnosingMatcher<String> matcher = new TypeSafeDiagnosingMatcher<String>() {11            protected boolean matchesSafely(String item, Description mismatchDescription) {12                mismatchDescription.appendText("was ").appendValue(item);13                return item.startsWith("J");14            }15            public void describeTo(Description description) {16                description.appendText("a string starting with 'J'");17            }18        };19        MatcherAssert.assertThat("Java", matcher);20        MatcherAssert.assertThat("Groovy", matcher);21        MatcherAssert.assertThat("JavaScript", matcher);22        MatcherAssert.assertThat("Python", matcher);23        MatcherAssert.assertThat("Ruby", matcher);24    }25}

TypeSafeDiagnosingMatcher

Using AI Code Generation

1public class ExceptionMessageMatcher extends TypeSafeDiagnosingMatcher<Exception> {2    private final String expectedMessage;3    private ExceptionMessageMatcher(String expectedMessage) {4        this.expectedMessage = expectedMessage;5    }6    public static ExceptionMessageMatcher hasMessage(String expectedMessage) {7        return new ExceptionMessageMatcher(expectedMessage);8    }9    protected boolean matchesSafely(Exception exception, Description mismatchDescription) {10        mismatchDescription.appendText("was ").appendValue(exception.getMessage());11        return expectedMessage.equals(exception.getMessage());12    }13    public void describeTo(Description description) {14        description.appendText("has message ").appendValue(expectedMessage);15    }16}17public void testExceptionMessage() {18    Exception exception = assertThrows(IllegalStateException.class, () -> {19        throw new IllegalStateException("message");20    });21    assertThat(exception, ExceptionMessageMatcher.hasMessage("message"));22}23public void testExceptionMessage() {24    Exception exception = assertThrows(IllegalStateException.class, () -> {25        throw new IllegalStateException("message");26    });27    assertEquals("message", exception.getMessage());28}

Source: Hamcrest's lessThan doesn't compile

1testCompile "org.hamcrest:hamcrest:2.0"2

Source: Hamcrest bug with either-or and null or incorrect usage?

1public interface MyMethod {2    public void method();3}456public class FirtObject{78    private SecondObject ob;910    public void tellSecondObjectExecuteLater(){11        ob.executeLater( new MyMethod() { 12          public void method(){System.out.println("duh Method");} });13    }14}1516public class SecondObject {1718    private MyMethod myMth;1920    public void executeLater(MyMethod mth){21        myMth = mth;22    }2324    public void executeNow(){25        myMth.method();26    }27}28

Source:Hamcrest bug with either-or and null or incorrect usage?

public interface MyMethod {
    public void method();
}


public class FirtObject{

    private SecondObject ob;

    public void tellSecondObjectExecuteLater(){
        ob.executeLater( new MyMethod() { 
          public void method(){System.out.println("duh Method");} });
    }
}

public class SecondObject {

    private MyMethod myMth;

    public void executeLater(MyMethod mth){
        myMth = mth;
    }

    public void executeNow(){
        myMth.method();
    }
}

Source: How should I handle exceptions in custom Hamcrest matchers?

1interface Comparator<T> {2    public int compare( T a, T b); 3}45class SpecialCollection<T> {6    public void sort( Comparator<T> comparator ) {...} 7}89public class SomeClient {10    public void doSomething( SpecialCollection<SpecialObj> collection ) {1112        collection.sort( new Comparator<SpecialObj>() {13           public int compare( SpecialObject a, SpecialObject b ) {14               // some implementation15           }16        } );17    }18}19

Source:How should I handle exceptions in custom Hamcrest matchers?

interface Comparator<T> {
    public int compare( T a, T b); 
}

class SpecialCollection<T> {
    public void sort( Comparator<T> comparator ) {...} 
}

public class SomeClient {
    public void doSomething( SpecialCollection<SpecialObj> collection ) {

        collection.sort( new Comparator<SpecialObj>() {
           public int compare( SpecialObject a, SpecialObject b ) {
               // some implementation
           }
        } );
    }
}

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