How to use matchesSafely method of org.hamcrest.TypeSafeDiagnosingMatcher class

Best junit code snippet using org.hamcrest.TypeSafeDiagnosingMatcher.matchesSafely

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...21public class Matchers {22 public static Matcher<ValidatingVisitor> containsNoFailures(){23 return new TypeSafeDiagnosingMatcher<ValidatingVisitor>(){24 private Matcher<Collection<?>> failureMatcher = empty();25 protected boolean matchesSafely(ValidatingVisitor visitor, Description description) {26 return failureMatcher.matches(visitor.getFailures()) || description.appendText("had failures " + visitor.getFailures()) == null;27 }28 public void describeTo(Description description) {29 description.appendText("Validator with an empty failure list");30 }31 };32 }33 public static Matcher<ValidatingVisitor> containsOneFailure(ErrorCode error){34 return new TypeSafeDiagnosingMatcher<ValidatingVisitor>(){35 protected boolean matchesSafely(ValidatingVisitor visitor, Description description) {36 return hasItem(withCode(error)).matches(visitor.getFailures()) || description.appendText("had failures " + visitor.getFailures()) == null;37 }38 public void describeTo(Description description) {39 description.appendText("validator with one failure of code " + error);40 }41 };42 }43 public static Matcher<CompileError> withCode(ErrorCode code){44 return new TypeSafeDiagnosingMatcher<CompileError>(){45 protected boolean matchesSafely(CompileError error, Description description) {46 return error.code.equals(code);47 }48 public void describeTo(Description description) {49 description.appendText("compile error with code " + code.name());50 }51 };52 }53 public static Matcher<BlockageDescription> blockageOnProperty(String propertyName) {54 return new TypeSafeDiagnosingMatcher<BlockageDescription>() {55 protected boolean matchesSafely(BlockageDescription blockageDescription, Description description) {56 return blockageDescription.propertyName.equals(propertyName) || description.appendText("had name " + blockageDescription.propertyName) == null;57 }58 public void describeTo(Description description) {59 description.appendText("a property with name " + propertyName);60 }61 };62 }63 public static Matcher<CompilationException> containingError(Matcher<CompileError> errorMatcher) {64 return new TypeSafeDiagnosingMatcher<CompilationException>() {65 private final Matcher<? super Iterable<CompileError>> listMatcher = hasItem(errorMatcher);66 protected boolean matchesSafely(CompilationException exception, Description description) {67 return listMatcher.matches(exception.errorList) || description.appendText("error received was " + exception.errorList) == null;68 }69 public void describeTo(Description description) {70 description.appendText("CompilationException containing error " + errorMatcher);71 }72 };73 }74 public static Matcher<RuntimeException> withPayload(final Matcher<?> payloadMatcher) {75 return new TypeSafeDiagnosingMatcher<RuntimeException>() {76 protected boolean matchesSafely(RuntimeException e, Description description) {77 return payloadMatcher.matches(e.payload);78 }79 public void describeTo(Description description) {80 description.appendText("RuntimeException with payload " );81 payloadMatcher.describeTo(description);82 }83 };84 }85 @SafeVarargs86 public static <T> Matcher<Array<? super T>> hasValues(final T... values){87 List<Matcher<T>> matchers = Arrays.stream(values).map(org.hamcrest.Matchers::equalTo).collect(toList());88 @SuppressWarnings("unchecked")89 Matcher<T>[] matcherArray = matchers.toArray(new Matcher[matchers.size()]);90 return hasValues(matcherArray);91 }92 @SafeVarargs93 public static <T> Matcher<Array<? super T>> hasValues(final Matcher<T>... matchers){94 return new TypeSafeDiagnosingMatcher<Array<? super T>>() {95 protected boolean matchesSafely(Array<? super T> anArray, Description description) {96 int expectedSize = matchers.length;97 if (convert(anArray.size()) != expectedSize) {98 description.appendText("The array was not of size " + expectedSize);99 return false;100 }101 Iterator<? super T> iterator = anArray.iterator();102 for (Matcher<T> matcher : matchers) {103 Object next = iterator.next();104 if (!matcher.matches(next)) {105 matcher.describeMismatch(next, description);106 return false;107 }108 }109 return true;110 }111 public void describeTo(Description description) {112 description.appendText(Logic.FALSE.toString());113 }114 };115 }116 public static Matcher<Site> isSiteOfType(Type type) {117 return new TypeSafeDiagnosingMatcher<Site>() {118 protected boolean matchesSafely(Site site, Description description) {119 Type siteType = site.type;120 return type == siteType || type.isAssignableTo(siteType) || description.appendValue(siteType).appendText(" is not assignable") == null;121 }122 public void describeTo(Description description) {123 description.appendText("is assignable to " + type);124 }125 };126 }127 @SuppressWarnings("unchecked")128 public static Matcher<TextBuffer> wrote(String... statements){129 return wrote((Matcher[]) Arrays.stream(statements).map((line) -> equalTo(convert(line))).toArray(Matcher[]::new));130 }131 @SafeVarargs132 public static Matcher<TextBuffer> wrote(Matcher<Text>... statementMatchers){133 return new TypeSafeDiagnosingMatcher<TextBuffer>(){134 protected boolean matchesSafely(TextBuffer target, Description description) {135 List<Text> written = target.getWrittenLines();136 if (statementMatchers.length != written.size()){137 description.appendText("Number of written statements was " + written.size());138 return false;139 }140 java.util.Iterator<Text> i = target.getWrittenLines().iterator();141 for (Matcher<Text> matcher : statementMatchers) if (!matcher.matches(i.next())) {142 matcher.describeMismatch(target, description);143 return false;144 }145 return true;146 }147 public void describeTo(Description description) {148 description.appendText(" TextBuffer wrote lines matching ");149 for (Matcher<Text> statementMatcher : statementMatchers){150 statementMatcher.describeTo(description);151 }152 }153 };154 }155 @SuppressWarnings("unchecked")156 public static Matcher<TextBuffer> wroteNothing(){157 return new TypeSafeDiagnosingMatcher<TextBuffer>(){158 protected boolean matchesSafely(TextBuffer target, Description description) {159 List<Text> written = target.getWrittenLines();160 return written.isEmpty() || description.appendText(written.toString()).appendText(" was written") == null;161 }162 public void describeTo(Description description) {163 description.appendText(" TextBuffer wrote no lines");164 }165 };166 }167}...

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...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}...

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...10 /​* JADX DEBUG: Failed to find minimal casts for resolve overloaded methods, cast all args instead11 method: MutableMD:(java.lang.Iterable, org.hamcrest.Description):boolean12 arg types: [java.lang.Iterable<? super T>, org.hamcrest.Description]13 candidates:14 org.hamcrest.core.IsCollectionContaining.matchesSafely(java.lang.Object, org.hamcrest.Description):boolean15 MutableMD:(java.lang.Object, org.hamcrest.Description):boolean16 MutableMD:(java.lang.Iterable, org.hamcrest.Description):boolean */​17 /​* access modifiers changed from: protected */​18 @Override /​/​ org.hamcrest.TypeSafeDiagnosingMatcher19 public /​* bridge */​ /​* synthetic */​ boolean matchesSafely(Object obj, Description description) {20 return matchesSafely((Iterable) ((Iterable) obj), description);21 }22 public IsCollectionContaining(Matcher<? super T> elementMatcher2) {23 this.elementMatcher = elementMatcher2;24 }25 /​* access modifiers changed from: protected */​26 public boolean matchesSafely(Iterable<? super T> collection, Description mismatchDescription) {27 if (isEmpty(collection)) {28 mismatchDescription.appendText("was empty");29 return false;30 }31 Iterator<? super T> it = collection.iterator();32 while (it.hasNext()) {33 if (this.elementMatcher.matches(it.next())) {34 return true;35 }36 }37 mismatchDescription.appendText("mismatches were: [");38 boolean isPastFirst = false;39 for (Object item : collection) {40 if (isPastFirst) {...

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...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));74 }75}...

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...9 */​10 public static <T> Matcher<Optional<T>> isPresent() {11 return new TypeSafeDiagnosingMatcher<Optional<T>>() {12 @Override13 protected boolean matchesSafely(Optional<T> value, Description mismatchDescription) {14 mismatchDescription.appendText("is " + value);15 return value.isPresent();16 }17 @Override18 public void describeTo(Description description) {19 description.appendText("to be present");20 }21 };22 }23 /​**24 * Matcher for {@link Optional} that expects that it presents and applies passed <code>matcher</​code>25 *26 * @param matcher matcher to validate present optional value27 */​28 public static <T> Matcher<Optional<T>> isPresent(Matcher<T> matcher) {29 return new TypeSafeDiagnosingMatcher<Optional<T>>() {30 @Override31 protected boolean matchesSafely(Optional<T> value, Description mismatchDescription) {32 mismatchDescription.appendText("is " + value);33 return value.isPresent() && matcher.matches(value.get());34 }35 @Override36 public void describeTo(Description description) {37 description.appendText("to be present and match ")38 .appendDescriptionOf(matcher);39 }40 };41 }42 /​**43 * Matcher that expects empty optional.44 */​45 public static <T> Matcher<Optional<T>> isEmpty() {46 return new TypeSafeDiagnosingMatcher<Optional<T>>() {47 @Override48 protected boolean matchesSafely(Optional<T> value, Description mismatchDescription) {49 mismatchDescription.appendText("is " + value);50 return !value.isPresent();51 }52 @Override53 public void describeTo(Description description) {54 description.appendText("to be empty");55 }56 };57 }58 private OptionalMatchers() {59 }60}...

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...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}...

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...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 }29 return true;30 }31 @Override /​/​ org.hamcrest.SelfDescribing32 public void describeTo(Description description) {33 description.appendText("every item is ").appendDescriptionOf(this.matcher);34 }35 public static <U> Matcher<Iterable<? extends U>> everyItem(Matcher<U> itemMatcher) {...

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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 }30}...

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matchesSafely

Using AI Code Generation

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1import org.hamcrest.TypeSafeDiagnosingMatcher2class MyMatcher extends TypeSafeDiagnosingMatcher<String> {3 protected boolean matchesSafely(String item, Description mismatchDescription) {4 mismatchDescription.appendText("This is the mismatch description");5 return false;6 }7 public void describeTo(Description description) {8 description.appendText("This is the description");9 }10}11def matcher = new MyMatcher()12assertThat("foo", matcher)13import org.hamcrest.TypeSafeDiagnosingMatcher14class MyMatcher extends TypeSafeDiagnosingMatcher<String> {15 protected boolean matchesSafely(String item, Description mismatchDescription) {16 mismatchDescription.appendText("This is the mismatch description");17 return false;18 }19 public void describeTo(Description description) {20 description.appendText("This is the description");21 }22 protected void describeMismatchSafely(String item, Description mismatchDescription) {23 mismatchDescription.appendText("This is the mismatch description");24 }25}26def matcher = new MyMatcher()27assertThat("foo", matcher)

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matchesSafely

Using AI Code Generation

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1import org.hamcrest.TypeSafeDiagnosingMatcher2class CustomMatcher extends TypeSafeDiagnosingMatcher<CustomType> {3 boolean matchesSafely(CustomType customType, Description mismatchDescription) {4 if (customType.isValid()) {5 } else {6 mismatchDescription.appendText("invalid")7 }8 }9 void describeTo(Description description) {10 description.appendText("valid")11 }12}13assert new CustomType().isValid() == new CustomMatcher().matches(new CustomType())14assert new CustomType().isValid() == new CustomMatcher().matchesSafely(new CustomType(), new Description.NullDescription())

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matchesSafely

Using AI Code Generation

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1package com.thoughtworks.tdd;2import org.junit.jupiter.api.Test;3import static org.hamcrest.MatcherAssert.assertThat;4import static org.hamcrest.CoreMatchers.is;5import static org.hamcrest.CoreMatchers.containsString;6import static org.hamcrest.CoreMatchers.not;7import static org.junit.jupiter.api.Assertions.assertThrows;8public class ParkingLotTest {9 public void should_return_true_when_parkingLot_has_car() {10 ParkingLot parkingLot = new ParkingLot(1);11 Car car = new Car();12 parkingLot.park(car);13 assertThat(parkingLot.isFull(), is(true));14 }15 public void should_return_false_when_parkingLot_has_no_car() {16 ParkingLot parkingLot = new ParkingLot(1);17 assertThat(parkingLot.isFull(), is(false));18 }19 public void should_return_true_when_parkingLot_has_no_position() {20 ParkingLot parkingLot = new ParkingLot(1);21 Car car = new Car();22 parkingLot.park(car);23 assertThat(parkingLot.isFull(), is(true));24 }25 public void should_return_false_when_parkingLot_has_position() {26 ParkingLot parkingLot = new ParkingLot(1);27 Car car = new Car();28 parkingLot.park(car);29 parkingLot.unpark(car);30 assertThat(parkingLot.isFull(), is(false));31 }32 public void should_return_car_when_parkingLot_has_parked_car() {33 ParkingLot parkingLot = new ParkingLot(1);34 Car car = new Car();35 parkingLot.park(car);36 assertThat(parkingLot.unpark(car), is(car));37 }38 public void should_return_null_when_parkingLot_has_no_parked_car() {

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You should not need to test private methods.

  • A private method is specifically part of the implementation. You should not test the implemenation, but the functionality. If you test the functionality a class exposes, you can change the implementation while depending on the unit test.
  • If you feel the need to test a private method, this is a good sign that you should move the private method to another class and make the method public. By doing this, you get smaller classes and you can test the methods easily. If you do not want to expose this new class, you can make it package-private (the default access modifier).
https://stackoverflow.com/questions/3299405/how-should-i-test-private-methods-in-java

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