testCompile "org.hamcrest:hamcrest:2.0"
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}...
...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));...
...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}
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
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
JUnit 4 Expected Exception type
java: how to mock Calendar.getInstance()?
Changing names of parameterized tests
Mocking a class vs. mocking its interface
jUnit ignore @Test methods from base class
Important frameworks/tools to learn
Unit testing a Java Servlet
Meaning of delta or epsilon argument of assertEquals for double values
Different teardown for each @Test in jUnit
Best way to automagically migrate tests from JUnit 3 to JUnit 4?
There's actually an alternative to the @Test(expected=Xyz.class)
in JUnit 4.7 using Rule
and ExpectedException
In your test case you declare an ExpectedException
annotated with @Rule
, and assign it a default value of ExpectedException.none()
. Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was
@Rule public ExpectedException thrown= ExpectedException.none();
@Test
public void myTest() {
thrown.expect( Exception.class );
thrown.expectMessage("Init Gold must be >= 0");
rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}
Using this method, you might be able to test for the message in the generic exception to be something specific.
ADDITION
Another advantage of using ExpectedException
is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class)
annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.
Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class)
until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.
JUnit 5 NOTE:
JUnit 5 JUnit Jupiter has removed @Test(expected=...)
, @Rule
and ExpectedException
altogether. They are replaced with the new assertThrows()
, which requires the use of Java 8 and lambda syntax. ExpectedException
is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException
through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport
.
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