How to use appendDescriptionOf method of org.hamcrest.Interface Description class

Best junit code snippet using org.hamcrest.Interface Description.appendDescriptionOf

Source:ClassMatcherImpl.java

...160    }161    @Override162    public ClassMatcher implementing(Matcher<Type> interfaceMatcher) {163//        this.matchers.addMatcher(164//                description -> description.appendText("should implement ").appendDescriptionOf(interfaceMatcher),165//                item -> Arrays.asList(item.getInterfaces()).stream().anyMatch(aClass -> interfaceMatcher.matches(aClass)),166//                (item, description) -> description.appendText("")167//        );168        this.matchers.addMatcher(169                description -> description.appendText("should implement ").appendDescriptionOf(interfaceMatcher),170                item -> {171                    for (Class anInterface : item.getInterfaces()) {172                        if(interfaceMatcher.matches(anInterface)) {173                            return true;174                        }175                    }176                    return false;177                },178                (item, description) -> description.appendDescriptionOf(interfaceMatcher)179        );180        return this;181    }182    @Override183    public ClassMatcher extending(Class aClass) {184        this.matchers.addMatcher(185                "extends " + aClass.getName(),186                item -> aClass.equals(item.getSuperclass()),187                (item, description) -> description.appendText("was false")188        );189        return this;190    }191}...

Source:SomeNumberOfItems.java

...30	}31	@Override32	public void describePredicateOnFinder(Finder<E, CollectionOf<E>, ?> finder,	Description description) {33		describeNumberExpectedTo(description);		34		description.appendDescriptionOf(finder);35	}36	@Override37	public boolean isSatisfiedBy(CollectionOf<E> foundElements) {38		return cardinalityConstraint.matches(foundElements.size());39	}40	41	@Override42	public void diagnoseNotSatisfyingTo(Description dissatisfactionDescription,43			CollectionOf<E> foundElements, Description notFoundDescription) {44		if(foundElements.size()>0)45			describeActualNumberFound(foundElements, dissatisfactionDescription);46		else{47			dissatisfactionDescription48				.appendText("Not found - ")49				.appendText(notFoundDescription.toString());50		}51	}52	53	protected void describeActualNumberFound(Collection<E> foundElements,54			Description failureDescription) {55		failureDescription.appendText("found ")56			.appendValue(foundElements.size())57			.appendText(" such elements")58			.appendDescriptionOf(describable(foundElements));59	}60	61	protected void describeNumberExpectedTo(Description description) {62		if(cardinalityConstraint instanceof CustomNumberMatcher)63			description64			.appendDescriptionOf(cardinalityConstraint)65			.appendText(" ");66		67		else68			description69			.appendText("there to be ")70			.appendDescriptionOf(cardinalityConstraint)71			.appendText(" of ");72	}73	74	public static  interface CustomNumberMatcher{}75	76	@Factory77	public static <E> Predicate<E, CollectionOf<E>> aNumberOfElements(Matcher<Integer> cardinalityConstraint){78		return new SomeNumberOfItems<E>(cardinalityConstraint);79	}80}...

Source:TopologyMatchersImpl.java

...46    @Override47    public void describeTo(Description description) {48      description49          .appendText(String.format("as interface of %s: ", _node))50          .appendDescriptionOf(_subMatcher);51    }52    @Override53    protected boolean matchesSafely(String item, Description mismatchDescription) {54      NodeInterfacePair pair = NodeInterfacePair.of(_node, item);55      if (!_subMatcher.matches(pair)) {56        mismatchDescription57            .appendText(String.format("%s as interface of %s did not satisfy: ", item, _node))58            .appendDescriptionOf(_subMatcher);59        return false;60      }61      return true;62    }63  }64  private TopologyMatchersImpl() {}65}...

Source:Description.java

1package org.hamcrest;2public interface Description {3    public static final Description NONE = new NullDescription();4    Description appendDescriptionOf(SelfDescribing selfDescribing);5    Description appendList(String str, String str2, String str3, Iterable<? extends SelfDescribing> iterable);6    Description appendText(String str);7    Description appendValue(Object obj);8    <T> Description appendValueList(String str, String str2, String str3, Iterable<T> iterable);9    <T> Description appendValueList(String str, String str2, String str3, T... tArr);10    public static final class NullDescription implements Description {11        @Override // org.hamcrest.Description12        public Description appendDescriptionOf(SelfDescribing value) {13            return this;14        }15        @Override // org.hamcrest.Description16        public Description appendList(String start, String separator, String end, Iterable<? extends SelfDescribing> iterable) {17            return this;18        }19        @Override // org.hamcrest.Description20        public Description appendText(String text) {21            return this;22        }23        @Override // org.hamcrest.Description24        public Description appendValue(Object value) {25            return this;26        }...

appendDescriptionOf

Using AI Code Generation

1package com.example;2import org.hamcrest.Description;3import org.hamcrest.Factory;4import org.hamcrest.Matcher;5import org.hamcrest.TypeSafeMatcher;6public class IsInInclusiveRange<T extends Comparable<T>> extends TypeSafeMatcher<T> {7    private final T min;8    private final T max;9    public IsInInclusiveRange(T min, T max) {10        this.min = min;11        this.max = max;12    }13    public boolean matchesSafely(T item) {14        return min.compareTo(item) <= 0 && item.compareTo(max) <= 0;15    }16    public void describeTo(Description description) {17        description.appendText("a value between ").appendDescriptionOf(min).appendText(" and ").appendDescriptionOf(max);18    }19    public static <T extends Comparable<T>> Matcher<T> isInInclusiveRange(T min, T max) {20        return new IsInInclusiveRange<T>(min, max);21    }22}23package com.example;24import org.hamcrest.Matcher;25import org.junit.Test;26import java.math.BigDecimal;27import static com.example.IsInInclusiveRange.isInInclusiveRange;28import static org.hamcrest.MatcherAssert.assertThat;29import static org.hamcrest.Matchers.is;30public class IsInInclusiveRangeTest {31    public void testIsInInclusiveRange() {32        Matcher<BigDecimal> matcher = isInInclusiveRange(BigDecimal.ONE, BigDecimal.TEN);33        assertThat(BigDecimal.ONE, is(matcher));34        assertThat(BigDecimal.TEN, is(matcher));35        assertThat(BigDecimal.valueOf(5), is(matcher));36    }37}

appendDescriptionOf

Using AI Code Generation

1import org.hamcrest.Description2import org.hamcrest.Matcher3import org.hamcrest.TypeSafeMatcher4class CustomDescriptionMatcher extends TypeSafeMatcher<String> {5    CustomDescriptionMatcher(Matcher<String> matcher, String description) {6    }7    boolean matchesSafely(String item) {8        matcher.matches(item)9    }10    void describeTo(Description description) {11        matcher.describeTo(description)12    }13    void describeMismatchSafely(String item, Description mismatchDescription) {14        matcher.describeMismatch(item, mismatchDescription)15    }16    void appendDescriptionOf(Description description) {17        description.appendText(this.description)18    }19}20def customDescriptionMatcher(Matcher<String> matcher, String description) {21    new CustomDescriptionMatcher(matcher, description)22}23assertThat("Hello World", customDescriptionMatcher(startsWith("Hello"), "Starts with Hello"))24	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)25	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:8)26	at Script1.run(Script1.groovy:52)

appendDescriptionOf

Using AI Code Generation

1    public void describeTo(Description description) {2        description.appendText("a string containing ")3                .appendDescriptionOf(substringMatcher);4    }5}6public void testMatchesSafely() {7    String testString = "test string";8    assertThat(testString, containsString("test"));9}10public void testDoesNotMatchSafely() {11    String testString = "test string";12    assertThat(testString, not(containsString("test ")));13}14public void testDescribeMismatchSafely() {15    String testString = "test string";16    assertThrows(AssertionError.class,17            () -> assertThat(testString, containsString("test ")));18}19public void testDescribeTo() {20    String testString = "test string";21    assertThrows(AssertionError.class,22            () -> assertThat(testString, containsString("test ")));23}24public void testDescribeMismatchSafely() {25    String testString = "test string";26    assertThrows(AssertionError.class,27            () -> assertThat(testString, containsString("test ")));28}29public void testDescribeTo() {30    String testString = "test string";31    assertThrows(AssertionError.class,32            () -> assertThat(testString, containsString("test ")));33}34public void testDescribeMismatchSafely() {35    String testString = "test string";36    assertThrows(AssertionError.class,37            () -> assertThat(testString, containsString("test ")));38}39public void testDescribeTo() {40    String testString = "test string";41    assertThrows(AssertionError.class,42            () -> assertThat(testString, containsString("test ")));43}

appendDescriptionOf

Using AI Code Generation

1import org.hamcrest.Description;2import org.hamcrest.Matcher;3import org.hamcrest.TypeSafeDiagnosingMatcher;4public class TypeSafeDiagnosingMatcherDemo extends TypeSafeDiagnosingMatcher<String>{5	public void describeTo(Description description) {6		description.appendText("a string with length of ");7		description.appendValue(10);8	}9	protected boolean matchesSafely(String item, Description mismatchDescription) {10		if(item.length() == 10){11			return true;12		}13		mismatchDescription.appendText("was a string with length of ");14		mismatchDescription.appendValue(item.length());15		return false;16	}17	public static Matcher<String> hasLengthOf10(){18		return new TypeSafeDiagnosingMatcherDemo();19	}20}21import static org.hamcrest.MatcherAssert.assertThat;22import static org.hamcrest.Matchers.equalTo;23import static org.hamcrest.Matchers.is;24import org.hamcrest.Matcher;25import org.junit.Test;26public class TypeSafeDiagnosingMatcherDemoTest {27	public void testHasLengthOf10(){28		Matcher<String> matcher = TypeSafeDiagnosingMatcherDemo.hasLengthOf10();29		assertThat("1234567890", is(matcher));30		assertThat("123456789", is(equalTo(matcher)));31	}32}

appendDescriptionOf

Using AI Code Generation

1public class AppendingDescriptionOfMatcher<T> extends TypeSafeMatcher<T> {2    private final Matcher<T> matcher;3    private final T object;4    public AppendingDescriptionOfMatcher(Matcher<T> matcher, T object) {5        this.matcher = matcher;6        this.object = object;7    }8    public void describeTo(Description description) {9        matcher.describeTo(description);10        description.appendText(" ").appendDescriptionOf(object);11    }12    protected boolean matchesSafely(T item) {13        return matcher.matches(item);14    }15    protected void describeMismatchSafely(T item, Description mismatchDescription) {16        matcher.describeMismatch(item, mismatchDescription);17    }18    public static <T> Matcher<T> appendDescriptionOf(Matcher<T> matcher, T object) {19        return new AppendingDescriptionOfMatcher<>(matcher, object);20    }21}22public class AppendingDescriptionOfMatcher<T> extends TypeSafeMatcher<T> {23    private final Matcher<T> matcher;24    private final T object;25    public AppendingDescriptionOfMatcher(Matcher<T> matcher, T object) {26        this.matcher = matcher;27        this.object = object;28    }29    public void describeTo(Description description) {30        matcher.describeTo(description);31        description.appendText(" ").appendDescriptionOf(object);32    }33    protected boolean matchesSafely(T item) {34        return matcher.matches(item);35    }36    protected void describeMismatchSafely(T item, Description mismatchDescription) {37        matcher.describeMismatch(item, mismatchDescription);38    }39    public static <T> Matcher<T> appendDescriptionOf(Matcher<T> matcher, T object) {40        return new AppendingDescriptionOfMatcher<>(matcher, object);41    }42}

appendDescriptionOf

Using AI Code Generation

1class StartsWith extends TypeSafeDiagnosingMatcher<String> {2    StartsWith(String prefix) {3    }4    protected boolean matchesSafely(String item, Description mismatchDescription) {5        boolean matches = item.startsWith(prefix)6        if (!matches) {7            mismatchDescription.appendText("was \"").appendText(item).appendText("\"")8        }9    }10    public void describeTo(Description description) {11        description.appendText("string starting with \"").appendText(prefix).appendText("\"")12    }13}14static Matcher<String> startsWith(String prefix) {15    return new StartsWith(prefix)16}17def "a string starting with a given prefix"() {18    "abc" == startsWith("a")19    "abc" != startsWith("b")20}21def "a string starting with a given prefix"() {22    "abc" == startsWith("a")23    "abc" != startsWith("b")24}25def "a string starting with a given prefix"() {26    "abc" == startsWith("a")27    "abc" != startsWith("b")28}29def "a string starting with a given prefix"() {30    "abc" == startsWith("a")31    "abc" != startsWith("b")32}33def "a string starting with a given prefix"() {34    "abc" == startsWith("a")35    "abc" != startsWith("b")36}37def "a string starting with a given prefix"() {38    "abc" == startsWith("a")39    "abc" != startsWith("b")40}

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
What is the JUnit framework
Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.