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How to use DiagnosingMatcher class of org.hamcrest package

Best junit code snippet using org.hamcrest.DiagnosingMatcher

Source:ContextMatcher.java

...4 */5package org.opensearch.dataprepper.expression.util;6import org.antlr.v4.runtime.tree.ParseTree;7import org.hamcrest.Description;8import org.hamcrest.DiagnosingMatcher;9import org.hamcrest.Matcher;10import org.opensearch.dataprepper.expression.antlr.DataPrepperExpressionParser;11import javax.annotation.Nullable;12import static org.hamcrest.CoreMatchers.instanceOf;13import static org.hamcrest.CoreMatchers.is;14import static org.hamcrest.core.IsEqual.equalTo;15import static org.opensearch.dataprepper.expression.util.TerminalNodeMatcher.isTerminalNode;16/**17 * @since 1.318 *19 * <p>20 *     ContextMatcher is a custom Hamcrest matcher to assert if a {@link ParseTree} is an instance of the expected21 *     context and assert child node types and count. Should be used with {@link TerminalNodeMatcher}.22 * </p>23 * <p>24 *     <b>Example</b><br>25 *     Given tree:26 *     <pre>27 *     Expression<br>28 *     ââ ConditionalExpression<br>29 *     â  ââ EqualityOperatorExpression<br>30 *     ââ &lt;EOF&gt;<br>31 *     </pre>32 *33 *     Matcher Assertion34 *     <pre>35 *         assertThat(parseTree, hasContext(Expression,<br>36 *             hasContext(ConditionalExpression, hasContext(EqualityOperatorExpression)),<br>37 *             hasContext(isTerminalNode())<br>38 *         ))39 *     </pre>40 * </p>41 */42public class ContextMatcher extends DiagnosingMatcher<ParseTree> {43    /**44     * Converts long antlr class names to easily read format. Class names without '$' will not be formatted.45     * @param object source of class name to format46     * @return formatted string47     */48    protected static String shortClassString(final Object object) {49        final String classString = object.getClass().toString();50        final int endOfPrefix = classString.indexOf('$');51        if (endOfPrefix >= 0) {52            return classString.substring(endOfPrefix + 1);53        }54        else {55            return classString;56        }57    }58    /**59     * Creates a string of a parse tree and all parent nodes to give context on where in a tree a node is located.60     * @param parseTree node to generate location from61     * @param mismatch Hamcrest Description where context will be appended.62     */63    protected static void describeContextTo(final ParseTree parseTree, final Description mismatch) {64        if (parseTree != null) {65            final StringBuilder context = new StringBuilder(parseTree.getText() + " | " + shortClassString(parseTree));66            ParseTree parent = parseTree.getParent();67            while (parent != null) {68                context.insert(0, parent.getText() + " | " + shortClassString(parent) + "\n\t\t-> ");69                parent = parent.getParent();70            }71            mismatch.appendText("\n\t\t" + context + "\n\t\t");72        }73    }74    /**75     * Creates matcher to check if tree is <b>operatorType</b> with a single child of type TerminalNode76     * @param operatorType class type of operator to assert77     * @return DiagnosingMatcher78     */79    public static DiagnosingMatcher<ParseTree> isOperator(final Class<? extends ParseTree> operatorType) {80        return hasContext(operatorType, isTerminalNode());81    }82    /**83     * @since 1.384     *85     * <p>Creates a matcher to check for standard ParseTree root.</p>86     * <pre>87     * Expression<br>88     * ââ {lhs}<br>89     * ââ &lt;EOF&gt;<br>90     * </pre>91     *92     * @param lhs matcher to use for the first child of the Expression node93     * @return DiagnosingMatcher94     *95     * @see ContextMatcher#hasContext(Class, DiagnosingMatcher[])96     */97    public static DiagnosingMatcher<ParseTree> isExpression(final DiagnosingMatcher<ParseTree> lhs) {98        return hasContext(DataPrepperExpressionParser.ExpressionContext.class, lhs, isTerminalNode());99    }100    /**101     * @since 1.3102     * <p>Shortcut for constructor matching Hamcrest standard.</p>103     * <p>104     *     <b>Syntax</b><br>105     *     <pre>assertThat(parseTree, hasContext(Expression, [child assertions]))</pre>106     * </p>107     * @param parserRuleContextType used to assert ParseTree branch is instance of parserRuleContextType108     * @param childrenMatchers assertions to be used on child nodes. Matcher will also assert order and count109     * @return matcher instance110     */111    @SafeVarargs112    public static DiagnosingMatcher<ParseTree> hasContext(113            final Class<? extends ParseTree> parserRuleContextType,114            final DiagnosingMatcher<? extends ParseTree>... childrenMatchers115    ) {116        return new ContextMatcher(parserRuleContextType, childrenMatchers);117    }118    private final DiagnosingMatcher<? extends ParseTree>[] childrenMatchers;119    final Matcher<? extends ParseTree> isParserRuleContextType;120    private final Matcher<Integer> listSizeMatcher;121    @Nullable122    private Matcher<?> failedAssertion;123    @SafeVarargs124    public ContextMatcher(125            final Class<? extends ParseTree> parserRuleContextType,126            final DiagnosingMatcher<? extends ParseTree> ... childrenMatchers127    ) {128        this.childrenMatchers = childrenMatchers;129        isParserRuleContextType = is(instanceOf(parserRuleContextType));130        listSizeMatcher = equalTo(childrenMatchers.length);131    }132    /**133     * @since 1.3134     * Asserts number of children equal to the number of childMatchers and, in order each child matches the135     * corresponding matcher.136     * @param parseTree ParseTree branch to get children from137     * @param mismatch Description used for printing Hamcrest mismatch messages138     * @return true if all assertions pass139     */140    private boolean matchChildren(final ParseTree parseTree, final Description mismatch) {141        if (listSizeMatcher.matches(parseTree.getChildCount())) {142            for (int i = 0; i < childrenMatchers.length; i++) {143                final ParseTree child = parseTree.getChild(i);144                final DiagnosingMatcher<? extends ParseTree> matcher = childrenMatchers[i];145                if (!matcher.matches(child)) {146                    mismatch.appendText("Expected context \"" + child.getText() + "\"");147                    mismatch.appendText(" | " + shortClassString(child));148                    mismatch.appendText(" to match ");149                    mismatch.appendDescriptionOf(matcher);150                    mismatch.appendText("\n\t\t");151                    matcher.describeMismatch(child, mismatch);152                    failedAssertion = matcher;153                    return false;154                }155            }156            return true;157        }158        else {...

Source:ParenthesesExpressionMatcher.java

...4 */5package org.opensearch.dataprepper.expression.util;6import org.antlr.v4.runtime.tree.ParseTree;7import org.hamcrest.Description;8import org.hamcrest.DiagnosingMatcher;9import org.hamcrest.Matcher;10import org.opensearch.dataprepper.expression.antlr.DataPrepperExpressionParser;11import static org.hamcrest.CoreMatchers.is;12import static org.opensearch.dataprepper.expression.util.ContextMatcher.hasContext;13import static org.opensearch.dataprepper.expression.util.TerminalNodeMatcher.isTerminalNode;14/**15 * @since 1.316 * <p>Matcher that asserts a unary tree ending in a Parentheses Expression Context</p>17 * <p>18 *     <b>Valid tree order</b><br>19 *     <pre>20 *     ExpressionContext<br>21 *     ââ ConditionalExpression<br>22 *        ââ EqualityOperatorExpression<br>23 *           ââ RegexOperatorExpressionContext<br>24 *              ââ RelationalOperatorExpressionContext<br>25 *                 ââ SetOperatorExpressionContext<br>26 *                    ââ UnaryOperatorExpressionContext<br>27 *                       ââ ParenthesesExpressionContext<br>28 *                          ââ TerminalNode<br>29 *                          ââ <i>&lt;childMatcher&gt;</i><br>30 *                          ââ TerminalNode<br>31 *     </pre>32 *     Note, a valid ParseTree may start at any level within the valid tree order33 * </p>34 */35public class ParenthesesExpressionMatcher extends SimpleExpressionMatcher {36    private static final Matcher<Integer> THREE_CHILDREN_MATCHER = is(3);37    private static final RuleClassOrderedList VALID_PARENTHESES_RULE_ORDER = new RuleClassOrderedList(38            DataPrepperExpressionParser.ExpressionContext.class,39            DataPrepperExpressionParser.ConditionalExpressionContext.class,40            DataPrepperExpressionParser.EqualityOperatorExpressionContext.class,41            DataPrepperExpressionParser.RegexOperatorExpressionContext.class,42            DataPrepperExpressionParser.RelationalOperatorExpressionContext.class,43            DataPrepperExpressionParser.SetOperatorExpressionContext.class,44            DataPrepperExpressionParser.UnaryOperatorExpressionContext.class,45            DataPrepperExpressionParser.ParenthesesExpressionContext.class46    );47    /**48     * creates a matcher that asserts starting from a given ParseTree down only one child is present and each child is in a valid order49     * until a {@link DataPrepperExpressionParser.ParenthesesExpressionContext} node is found. Then asserts the node has 3 children. Outer50     * children must be terminal nodes and <b>childMatcher</b> matches middle child.51     * @param childMatcher matcher for ParenthesesExpressionContext middle child node52     * @return DiagnosingMatcher53     */54    public static DiagnosingMatcher<ParseTree> isParenthesesExpression(final DiagnosingMatcher<? extends ParseTree> childMatcher) {55        return new ParenthesesExpressionMatcher(VALID_PARENTHESES_RULE_ORDER, childMatcher);56    }57    private final DiagnosingMatcher<? extends ParseTree> childrenMatcher;58    protected ParenthesesExpressionMatcher(59            final RuleClassOrderedList validRuleOrder,60            final DiagnosingMatcher<? extends ParseTree> childMatcher61    ) {62        super(validRuleOrder);63        this.childrenMatcher = hasContext(64                DataPrepperExpressionParser.ParenthesesExpressionContext.class,65                isTerminalNode(),66                childMatcher,67                isTerminalNode()68        );69    }70    @Override71    protected boolean baseCase(final ParseTree item, final Description mismatchDescription) {72        if (!THREE_CHILDREN_MATCHER.matches(item.getChildCount())) {73            mismatchDescription.appendText("\n\t\t expected " + item.getText() + " to have 1 child node");74            return false;...

Source:ThrowableTranslatorTest.java

1package io.pick5.web.service.handlers;2import org.hamcrest.Description;3import org.hamcrest.DiagnosingMatcher;4import org.hamcrest.Factory;5import org.junit.jupiter.api.DisplayName;6import org.junit.jupiter.api.Test;7import org.springframework.http.HttpStatus;8import io.pick5.web.exception.InvalidParametersException;9import io.pick5.web.exception.PathNotFoundException;10import io.pick5.web.service.handlers.ThrowableTranslator;11import io.pick5.web.tags.UnitTest;12import reactor.core.publisher.Mono;13import java.lang.reflect.InvocationTargetException;14import static org.hamcrest.MatcherAssert.assertThat;15import static org.hamcrest.Matchers.is;16@UnitTest17@DisplayName("ThrowableTranslator Unit Tests")18class ThrowableTranslatorTest {19    @Factory20    private static DiagnosingMatcher<Object> translateTo(HttpStatus status) {21        return new DiagnosingMatcher<Object>() {22            private static final String EXCEPTION = "EXCEPTION";23            @Override24            public void describeTo(final Description description) {25                description.appendText("does not translate to ").appendText(status.toString());26            }27            @SuppressWarnings("unchecked")28            protected boolean matches(final Object item, final Description mismatch) {29                if (item instanceof Class) {30                    if (((Class) item).getClass().isInstance(Throwable.class)) {31                        Class<? extends Throwable> type = (Class<? extends Throwable>) item;32                        try {33                            Throwable exception = type.getConstructor(String.class).newInstance(EXCEPTION);34                            Mono.just(exception).transform(ThrowableTranslator::translate).subscribe(translator -> {35                                assertThat(translator.getMessage(), is(EXCEPTION));...

Source:Matchers.java

2import com.googlecode.totallylazy.functions.Function1;3import com.googlecode.totallylazy.predicates.Predicate;4import com.googlecode.totallylazy.predicates.LogicalPredicate;5import org.hamcrest.Description;6import org.hamcrest.DiagnosingMatcher;7import org.hamcrest.Matcher;8import org.hamcrest.SelfDescribing;9import org.hamcrest.StringDescription;10import org.hamcrest.TypeSafeMatcher;11import static com.googlecode.totallylazy.functions.Callables.returns1;12import static com.googlecode.totallylazy.Sequences.sequence;13import static com.googlecode.totallylazy.Unchecked.cast;14import static org.hamcrest.StringDescription.asString;15public class Matchers {16    public static <T> Iterable<Matcher<T>> are(final Iterable<T> values, Class<T> clazz) {17        return are(values);18    }19    public static <T> Iterable<Matcher<T>> are(final Iterable<T> values) {20        return sequence(values).map(Matchers.<T>isMatcher());21    }22    public static Function1<SelfDescribing, String> description() {23        return selfDescribing -> asString(selfDescribing);24    }25    public static <T> Function1<T, String> describeMismatch(Class<T> type, final Matcher<? super T> matcher) {26        return describeMismatch(matcher);27    }28    public static <T> Function1<T, String> describeMismatch(final Matcher<? super T> matcher) {29        if (matcher instanceof DiagnosingMatcher)30            return diagnoseMismatch((DiagnosingMatcher) matcher);31        return returns1(StringDescription.asString(matcher));32    }33    public static <T> Function1<T, String> diagnoseMismatch(Class<T> type, final DiagnosingMatcher matcher) {34        return diagnoseMismatch(matcher);35    }36    public static <T> Function1<T, String> diagnoseMismatch(final DiagnosingMatcher matcher) {37        return t -> {38            StringDescription mismatchDescription = new StringDescription();39            matcher.describeMismatch(t, mismatchDescription);40            return mismatchDescription.toString();41        };42    }43    public static <T> Function1<T, Matcher<T>> isMatcher(Class<T> clazz) {44        return isMatcher();45    }46    public static <T> Function1<T, Matcher<T>> isMatcher() {47        return Matchers::is;48    }49    public static <T> LogicalPredicate<T> predicate(final Matcher<T> matcher) {50        return new LogicalPredicate<T>() {...

Source:IsInstanceOf.java

1package org.hamcrest.core;2import org.hamcrest.Description;3import org.hamcrest.DiagnosingMatcher;4import org.hamcrest.Matcher;5public class IsInstanceOf extends DiagnosingMatcher<Object> {6    private final Class<?> expectedClass;7    private final Class<?> matchableClass;8    public IsInstanceOf(Class<?> expectedClass2) {9        this.expectedClass = expectedClass2;10        this.matchableClass = matchableClass(expectedClass2);11    }12    private static Class<?> matchableClass(Class<?> expectedClass2) {13        if (Boolean.TYPE.equals(expectedClass2)) {14            return Boolean.class;15        }16        if (Byte.TYPE.equals(expectedClass2)) {17            return Byte.class;18        }19        if (Character.TYPE.equals(expectedClass2)) {20            return Character.class;21        }22        if (Double.TYPE.equals(expectedClass2)) {23            return Double.class;24        }25        if (Float.TYPE.equals(expectedClass2)) {26            return Float.class;27        }28        if (Integer.TYPE.equals(expectedClass2)) {29            return Integer.class;30        }31        if (Long.TYPE.equals(expectedClass2)) {32            return Long.class;33        }34        if (Short.TYPE.equals(expectedClass2)) {35            return Short.class;36        }37        return expectedClass2;38    }39    /* access modifiers changed from: protected */40    @Override // org.hamcrest.DiagnosingMatcher41    public boolean matches(Object item, Description mismatch) {42        if (item == null) {43            mismatch.appendText("null");44            return false;45        } else if (this.matchableClass.isInstance(item)) {46            return true;47        } else {48            Description appendValue = mismatch.appendValue(item);49            appendValue.appendText(" is a " + item.getClass().getName());50            return false;51        }52    }53    @Override // org.hamcrest.SelfDescribing54    public void describeTo(Description description) {...

Source:TableMatcher.java

...14 * limitations under the License.15 */16package org.springframework.cloud.dataflow.shell.command;17import org.hamcrest.Description;18import org.hamcrest.DiagnosingMatcher;19import org.hamcrest.Matcher;20import org.springframework.shell.table.Table;21import org.springframework.shell.table.TableModel;22/**23 * A Hamcrest matcher to help with assertions on24 * {@link org.springframework.shell.table.Table}s without resorting to rendering them to a25 * String.26 *27 * @author Eric Bottard28 */29public class TableMatcher {30	public static DiagnosingMatcher<Table> hasRowThat(Matcher<?>... cells) {31		return new DiagnosingMatcher<Table>() {32			@Override33			protected boolean matches(Object item, Description mismatchDescription) {34				TableModel model = ((Table) item).getModel();35				outer: for (int row = 0; row < model.getRowCount(); row++) {36					mismatchDescription.appendText("\nRow " + row + ": ");37					for (int col = 0; col < cells.length; col++) {38						mismatchDescription.appendText("\n  Column " + col + ": ");39						cells[col].describeMismatch(model.getValue(row, col), mismatchDescription);40						if (!cells[col].matches(model.getValue(row, col))) {41							continue outer;42						}43					}44					return true;45				}...

Source:ApplicationExceptionMatcher.java

1package com.mozzartbet.gameservice.service;23import org.hamcrest.DiagnosingMatcher;4import static com.google.common.base.Objects.*;56import org.hamcrest.Description;7import org.hamcrest.DiagnosingMatcher;89import com.mozzartbet.gameservice.exception.ApplicationException;10import com.mozzartbet.gameservice.exception.ApplicationExceptionCode;1112import lombok.RequiredArgsConstructor;1314import com.mozzartbet.gameservice.exception.ApplicationException;1516public class ApplicationExceptionMatcher<E extends ApplicationException> extends DiagnosingMatcher<E>  {17	18	final Class<E> exceptionClass;19	final ApplicationExceptionCode exceptionCode;2021	final String expectedMessage;2223	@Override24	public void describeTo(Description desc) {25		desc.appendText("exception: ").appendValue(exceptionClass).appendText(", code: ").appendValue(exceptionCode)26				.appendText(", message:").appendValue(expectedMessage);27	}2829	@Override30	protected boolean matches(Object item, Description mismatch) {
...

Source:AllOf.java

1package org.hamcrest.core;2import java.util.Arrays;3import org.hamcrest.Description;4import org.hamcrest.DiagnosingMatcher;5import org.hamcrest.Matcher;6public class AllOf<T> extends DiagnosingMatcher<T> {7    private final Iterable<Matcher<? super T>> matchers;8    public AllOf(Iterable<Matcher<? super T>> matchers2) {9        this.matchers = matchers2;10    }11    @Override // org.hamcrest.DiagnosingMatcher12    public boolean matches(Object o, Description mismatch) {13        for (Matcher<? super T> matcher : this.matchers) {14            if (!matcher.matches(o)) {15                mismatch.appendDescriptionOf(matcher).appendText(" ");16                matcher.describeMismatch(o, mismatch);17                return false;18            }19        }20        return true;21    }22    @Override // org.hamcrest.SelfDescribing23    public void describeTo(Description description) {24        description.appendList("(", " and ", ")", this.matchers);25    }...

DiagnosingMatcher

Using AI Code Generation

1import static org.hamcrest.MatcherAssert.assertThat;2import static org.hamcrest.Matchers.*;3import org.hamcrest.Description;4import org.hamcrest.DiagnosingMatcher;5import org.hamcrest.Factory;6import org.hamcrest.Matcher;7public class DiagnosingMatcherTest {8  public static void main(String[] args) {9    assertThat("Hello World", hasLength(5));10  }11  public static Matcher<String> hasLength(int length) {12    return new DiagnosingMatcher<String>() {13      protected boolean matches(Object item, Description mismatchDescription) {14        if (item instanceof String) {15          String str = (String) item;16          if (str.length() == length) {17            return true;18          } else {19            mismatchDescription.appendText("was ").appendValue(str.length())20                .appendText(" characters");21            return false;22          }23        } else {24          mismatchDescription.appendText("was not a String");25          return false;26        }27      }28      public void describeTo(Description description) {29        description.appendText("a String of length ").appendValue(length);30      }31    };32  }33}

DiagnosingMatcher

Using AI Code Generation

1public class IsPrimeNumber extends DiagnosingMatcher<Integer> {2    protected boolean matches(Object item, Description mismatchDescription) {3        if (item == null) {4            mismatchDescription.appendText("was null");5            return false;6        }7        if (!(item instanceof Integer)) {8            mismatchDescription.appendText("was a ").appendText(item.getClass().getName()).appendText(" not an Integer");9            return false;10        }11        int number = (Integer) item;12        for (int i = 2; i < number; i++) {13            if (number % i == 0) {14                mismatchDescription.appendText("was ").appendValue(number).appendText(", a composite number");15                return false;16            }17        }18        return true;19    }20    public void describeTo(Description description) {21        description.appendText("a prime number");22    }23    public static Matcher<Integer> isPrime() {24        return new IsPrimeNumber();25    }26}27public class PrimeNumberTest {28    public void testPrimeNumber() {29        assertThat(13, isPrime());30        assertThat(4, not(isPrime()));31    }32}33public class PrimeNumberTest {34    public void testPrimeNumber() {35        assertThat(13, isPrime());36        assertThat(4, not(isPrime()));37    }38}39public class PrimeNumberTest {40    public void testPrimeNumber() {41        assertThat(13, isPrime());42        assertThat(4, not(isPrime()));43    }44}

DiagnosingMatcher

Using AI Code Generation

1import org.hamcrest.*2import org.hamcrest.MatcherAssert.*3import org.hamcrest.Matchers.*4import static org.hamcrest.MatcherAssert.assertThat5import static org.hamcrest.Matchers.*6import static org.hamcrest.MatcherAssert.assertThat7import static org.hamcrest.Matchers.*8import static org.hamcrest.DiagnosingMatcher.*9import static org.hamcrest.MatcherAssert.assertThat10import static org.hamcrest.Matchers.*11import static org.hamcrest.DiagnosingMatcher.*12import static org.hamcrest.Matchers.*13import static org.hamcrest.MatcherAssert.assertThat14import static org.hamcrest.Matchers.*15import static org.hamcrest.DiagnosingMatcher.*16import static org.hamcrest.Matchers.*17import static org.hamcrest.Matchers.*18import static org.hamcrest.MatcherAssert.assertThat19import static org.hamcrest.Matchers.*20import static org.hamcrest.DiagnosingMatcher.*21import static org.hamcrest.Matchers.*22import static org.hamcrest.Matchers.*23import static org.hamcrest.Matchers.*24import static org.hamcrest.MatcherAssert.assertThat25import static org.hamcrest.Matchers.*26import static org.hamcrest.DiagnosingMatcher.*27import static org.hamcrest.Matchers.*28import static org.hamcrest.Matchers.*29import static org.hamcrest.Matchers.*30import static org.hamcrest.Matchers.*31import static org.hamcrest.MatcherAssert.assertThat32import static org.hamcrest.Matchers.*33import static org.hamcrest.DiagnosingMatcher.*34import static org.hamcrest.Matchers.*35import static org.hamcrest.Matchers.*36import static org.hamcrest.Matchers.*37import static org.hamcrest.Matchers.*38import static org.hamcrest.Matchers.*39import static org.hamcrest.MatcherAssert.assertThat40import static org.hamcrest.Matchers.*41import static org.hamcrest.DiagnosingMatcher.*42import static org.hamcrest.Matchers.*43import static org.hamcrest.Matchers.*44import static org.hamcrest.Matchers.*45import static org.hamcrest.Matchers.*

DiagnosingMatcher

Using AI Code Generation

1import static org.hamcrest.CoreMatchers.*;2import static org.hamcrest.MatcherAssert.assertThat;3import static org.junit.Assert.*;4import org.hamcrest.Description;5import org.hamcrest.Factory;6import org.hamcrest.Matcher;7import org.hamcrest.TypeSafeMatcher;8import org.junit.Test;9public class DiagnosingMatcherTest {10    public void test() {11        assertThat("Hello World", startsWith("Hello").and(endsWith("World")));12        assertThat("Hello World", startsWith("Hello").and(endsWith("World")));13        assertThat("Hello World", startsWith("Hello").and(endsWith("World")));14    }15    public static Matcher<String> startsWith(final String prefix) {16        return new DiagnosingMatcher<String>() {17            protected boolean matches(Object item, Description mismatchDescription) {18                if (item == null) {19                    mismatchDescription.appendText("was null");20                    return false;21                }22                String str = (String) item;23                if (!str.startsWith(prefix)) {24                    mismatchDescription.appendText("was ").appendValue(str);25                    return false;26                }27                return true;28            }29            public void describeTo(Description description) {30                description.appendText("startsWith ").appendValue(prefix);31            }32        };33    }34    public static Matcher<String> endsWith(final String suffix) {35        return new DiagnosingMatcher<String>() {36            protected boolean matches(Object item, Description mismatchDescription) {37                if (item == null) {38                    mismatchDescription.appendText("was null");39                    return false;40                }41                String str = (String) item;42                if (!str.endsWith(suffix)) {43                    mismatchDescription.appendText("was ").appendValue(str);44                    return false;45                }46                return true;47            }48            public void describeTo(Description description) {49                description.appendText("endsWith ").appendValue(suffix);50            }51        };52    }53}

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