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How to use describeTo method of org.assertj.core.matcher.AssertionMatcher class

Best Assertj code snippet using org.assertj.core.matcher.AssertionMatcher.describeTo

Source:AssertionMatcher_matches_Test.java

...34    @Test35    public void matcher_should_not_fill_description_when_assertion_passes() {36        Description description = Mockito.mock(Description.class);37        Assertions.assertThat(isZeroMatcher.matches(AssertionMatcher_matches_Test.ZERO)).isTrue();38        isZeroMatcher.describeTo(description);39        Mockito.verifyZeroInteractions(description);40    }41    @Test42    public void matcher_should_fail_when_assertion_fails() {43        Assertions.assertThat(isZeroMatcher.matches(AssertionMatcher_matches_Test.ONE)).isFalse();44    }45    /**46     * {@link Failures#removeAssertJRelatedElementsFromStackTrace} must be set to true47     * in order for this test to pass. It is in {@link this#setUp()}.48     */49    @Test50    public void matcher_should_fill_description_when_assertion_fails() {51        Description description = Mockito.mock(Description.class);52        Assertions.assertThat(isZeroMatcher.matches(AssertionMatcher_matches_Test.ONE)).isFalse();53        isZeroMatcher.describeTo(description);54        Mockito.verify(description).appendText("AssertionError with message: ");55        Mockito.verify(description).appendText(String.format("%nExpecting:%n <1>%nto be equal to:%n <0>%nbut was not."));56        Mockito.verify(description).appendText(String.format("%n%nStacktrace was: "));57        // @format:off58        Mockito.verify(description).appendText(ArgumentMatchers.argThat(new ArgumentMatcher<String>() {59            @Override60            public boolean matches(String s) {61                return (((s.contains(String.format("%nExpecting:%n <1>%nto be equal to:%n <0>%nbut was not."))) && (s.contains("at org.assertj.core.matcher.AssertionMatcher_matches_Test$1.assertion(AssertionMatcher_matches_Test.java:"))) && (s.contains("at org.assertj.core.matcher.AssertionMatcher.matches(AssertionMatcher.java:"))) && (s.contains("at org.assertj.core.matcher.AssertionMatcher_matches_Test.matcher_should_fill_description_when_assertion_fails(AssertionMatcher_matches_Test.java:"));62            }63        }));64        // @format:on65    }66}...

Source:AssertionMatcher.java

...18/**19 * Generic Hamcrest {@link Matcher} that reuses AssertJ assertions.20 * <p>21 * Overriding classes should only implement {@link AssertionMatcher#assertion(Object)} method as  22 * {@link Matcher#matches(Object)} and {@link Matcher#describeTo(Description)} are provided. 23 * <p>24 * If the matcher fails, the description will contain the stacktrace of the first failed assertion.25 * <p>26 * Example with Mockito:27 * <pre><code class='java'> verify(customerRepository).save(argThat(new AssertionMatcher&lt;Customer&gt;() {28 *     &#64;Override29 *     public void assertion(Customer actual) throws AssertionError {30 *       assertThat(actual).hasName(&quot;John&quot;)31 *                         .hasAge(30);32 *     }33 *   })34 * );</code></pre>35 * 36 * @param <T> the type of the object to test37 *38 * @author Tomasz KalkosiÅski39 * @since 2.7.0 / 3.7.040 */41public abstract class AssertionMatcher<T> extends BaseMatcher<T> {42  private AssertionError firstError;43  /**44   * {@inheritDoc}45   */46  @SuppressWarnings("unchecked")47  @Override48  public boolean matches(Object argument) {49    T actual = (T) argument;50    try {51      assertion(actual);52      return true;53    } catch (AssertionError e) {54      firstError = e;55      return false;56    }57  }58  /**59   * Perform the assertions implemented in this method when the {@link AssertionMatcher} is used as an Hamcrest {@link Matcher}.60   *61   * If the matcher fails, the description will contain the stacktrace of the first failed assertion.62   * <p>63   * Example with Mockito:64   * <pre><code class='java'> verify(customerRepository).save(argThat(new AssertionMatcher&lt;Customer&gt;() {65   *     &#64;Override66   *     public void assertion(Customer actual) throws AssertionError {67   *       assertThat(actual).hasName(&quot;John&quot;)68   *                         .hasAge(30);69   *     }70   *   })71   * );</code></pre>72   *73   * @param actual assertion object74   * @throws AssertionError if the assertion object fails assertion75   */76  public abstract void assertion(T actual) throws AssertionError;77  /**78   * {@inheritDoc}79   */80  @Override81  public void describeTo(Description description) {82    if (firstError != null) {83      description.appendText("AssertionError with message: ");84      description.appendText(firstError.getMessage());85      description.appendText(String.format("%n%nStacktrace was: "));86      description.appendText(Throwables.getStackTrace(firstError));87    }88  }89}...

describeTo

Using AI Code Generation

1import org.assertj.core.matcher.AssertionMatcher;2import org.junit.Test;3import java.util.ArrayList;4import java.util.Collection;5import java.util.List;6import static org.assertj.core.api.Assertions.assertThat;7import static org.assertj.core.api.Assertions.assertThatExceptionOfType;8import static org.assertj.core.api.Assertions.assertThatThrownBy;9public class AssertJTest {10    public void testAssertJ(){11        List<String> list = new ArrayList<>();12        list.add("one");13        list.add("two");14        list.add("three");15        assertThat(list).hasSize(3)16                .contains("one", "two")17                .doesNotContain("four")18                .allMatch(s -> s.length() > 2)19                .noneMatch(s -> s.length() > 4);20        assertThatExceptionOfType(RuntimeException.class)21                .isThrownBy(() -> { throw new RuntimeException("boom!"); })22                .withMessage("boom!")23                .withNoCause();24        assertThatThrownBy(() -> { throw new RuntimeException("boom!"); })25                .isInstanceOf(RuntimeException.class)26                .hasMessage("boom!")27                .hasNoCause();28        assertThat(list).extracting(String::length).contains(3, 4, 5);29        assertThat(list).extracting("length").contains(3, 4, 5);30        assertThat(list).extracting("length", Integer.class).contains(3, 4, 5);31        assertThat(list).filteredOn(s -> s.length() > 3).contains("three");32        assertThat(list).filteredOn("length", 5).contains("three");33        assertThat(list).filteredOn("length", in(3, 5)).contains("one", "three");34        assertThat(list).flatExtracting(String::chars).contains(1, 2, 3);35        assertThat(list).flatExtracting("chars").contains(1, 2, 3);36        assertThat(list).flatExtracting("chars", Integer.class).contains(1, 2, 3);37    }38    private static AssertionMatcher<Integer> in(final int... values) {39        return new AssertionMatcher<Integer>() {40            public void assertion(Integer actual) {41                assertThat(values).contains(actual);42            }43        };44    }45}

describeTo

Using AI Code Generation

1import org.assertj.core.matcher.AssertionMatcher;2import org.hamcrest.Description;3import org.hamcrest.Matcher;4import org.junit.Test;5import static org.hamcrest.MatcherAssert.assertThat;6import static org.hamcrest.Matchers.is;7import static org.hamcrest.Matchers.not;8import static org.hamcrest.Matchers.startsWith;9public class AssertionMatcherTest {10    public void testAssertionMatcher() {11        AssertionMatcher<Integer> assertionMatcher = new AssertionMatcher<Integer>() {12            public void assertion(Integer actual) {13                assertThat(actual, startsWith(1));14            }15        };16        assertThat(12, assertionMatcher);17        assertThat(2, not(assertionMatcher));18    }19}20import org.hamcrest.BaseMatcher;21import org.hamcrest.Description;22import org.hamcrest.Matcher;23import org.junit.Test;24import static org.hamcrest.MatcherAssert.assertThat;25import static org.hamcrest.Matchers.is;26import static org.hamcrest.Matchers.not;27import static org.hamcrest.Matchers.startsWith;28public class BaseMatcherTest {29    public void testBaseMatcher() {30        BaseMatcher<Integer> baseMatcher = new BaseMatcher<Integer>() {31            public void describeTo(Description description) {32                description.appendText("starts with 1");33            }34            public boolean matches(Object item) {35                return item.toString().startsWith("1");36            }37        };38        assertThat(12, is(baseMatcher));39        assertThat(2, is(not(baseMatcher)));40    }41}42import org.hamcrest.Description;43import org.hamcrest.TypeSafeMatcher;44import org.junit.Test;45import static org.hamcrest.MatcherAssert.assertThat;46import static org.hamcrest.Matchers.is;47import static org.hamcrest.Matchers.not;48import static org.hamcrest.Matchers.startsWith;49public class TypeSafeMatcherTest {50    public void testTypeSafeMatcher() {51        TypeSafeMatcher<Integer> typeSafeMatcher = new TypeSafeMatcher<Integer>() {52            public void describeTo(Description description) {53                description.appendText("starts with 1");54            }55            protected boolean matchesSafely(Integer item) {56                return item.toString().startsWith("1");57            }58        };59        assertThat(12, is(typeSafeMatcher));60        assertThat(2, is(not(typeSafeMatcher)));61    }62}63import org.hamcrest.SelfDes

describeTo

Using AI Code Generation

1import org.junit.Test;2import org.junit.runner.RunWith;3import org.mockito.junit.MockitoJUnitRunner;4import org.assertj.core.matcher.AssertionMatcher;5import static org.assertj.core.api.Assertions.assertThat;6import static org.mockito.Mockito.mock;7public class 1 {8    public void test() {9        AssertionMatcher<Object> assertionMatcher = new AssertionMatcher<Object>() {10            public void assertion(Object o) {11                assertThat(o).isEqualTo("test");12            }13        };14        assertThat(assertionMatcher).describedAs("test").matches("test");15    }16}17	at org.junit.Assert.assertEquals(Assert.java:115)18	at org.junit.Assert.assertEquals(Assert.java:144)19	at org.assertj.core.matcher.AssertionMatcher.matches(AssertionMatcher.java:34)20	at org.assertj.core.matcher.AssertionMatcher.matches(AssertionMatcher.java:1)21	at org.assertj.core.api.AbstractAssert.matches(AbstractAssert.java:87)22	at 1.test(1.java:20)23AssertionMatcher.matches() method is called from Abstract

describeTo

Using AI Code Generation

1package org.junit;2import org.junit.runner.RunWith;3import org.junit.runners.Parameterized;4import org.junit.runners.Parameterized.Parameters;5import org.junit.runners.Parameterized.Parameter;6import static org.assertj.core.api.Assertions.assertThat;7import static org.assertj.core.api.Assertions.assertThatExceptionOfType;8import static org.assertj.core.api.Assertions.catchThrowable;9import static org.assertj.core.api.Assertions.fail;10import static org.assertj.core.api.Assertions.failBecauseExceptionWasNotThrown;11import static org.assertj.core.api.Assertions.failBecauseExceptionWasNotThrown;12import stati

describeTo

Using AI Code Generation

1import org.assertj.core.matcher.AssertionMatcher;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThat;4public class AssertionMatcherTest {5    public void testAssertionMatcher() {6        assertThat("Java", new AssertionMatcher<String>() {7            public void assertion(String s) throws AssertionError {8                assertThat(s).startsWith("J").endsWith("a");9            }10        });11    }12}

describeTo

Using AI Code Generation

1import org.assertj.core.matcher.AssertionMatcher;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThat;4public class AssertJTest {5    public void testAssertJ() {6        assertThat("Hello World").matches(new AssertionMatcher<String>() {7            public void assertion(String s) {8                assertThat(s).isEqualToIgnoringCase("Hello World");9            }10        });11    }12}13import org.assertj.core.matcher.AssertionMatcher;14import org.junit.Test;15import static org.assertj.core.api.Assertions.assertThat;16public class AssertJTest {17    public void testAssertJ() {18        assertThat("Hello World").matches(new AssertionMatcher<String>() {19            public void assertion(String s) {20                assertThat(s).isEqualToIgnoringCase("Hello World");21            }22        });23    }24}25import org.assertj.core.matcher.AssertionMatcher;26import org.junit.Test;27import static org.assertj.core.api.Assertions.assertThat;28public class AssertJTest {29    public void testAssertJ() {30        assertThat("Hello World").matches(new AssertionMatcher<String>() {31            public void assertion(String s) {32                assertThat(s).isEqualToIgnoringCase("Hello World");33            }34        });35    }36}

describeTo

Using AI Code Generation

1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.matcher.AssertionMatcher.*;3import static org.mockito.Mockito.*;4import java.util.*;5import org.junit.Test;6import org.mockito.Mockito;7import org.mockito.Mockito.*;

describeTo

Using AI Code Generation

1import java.util.*;2import static org.assertj.core.api.Assertions.assertThat;3import static org.assertj.core.matcher.AssertionMatcher.*;4import static org.assertj.core.api.Assertions.*;5import org.assertj.core.matcher.AssertionMatcher;6public class AssertionMatcherExample {7   public static void main(String[] args) {8      List<String> list = new ArrayList<>();9      list.add("hello");10      list.add("world");11      assertThat(list, hasSize(2));12      assertThat(list, contains("hello", "world"));13      assertThat(list, contains(assertion(s -> s.length() > 3, "length > 3")));14      assertThat(list, contains(assertion(s -> s.length() > 10, "length > 10")));15   }16}

describeTo

Using AI Code Generation

1import org.junit.*;2import org.junit.runner.*;3import org.junit.runners.*;4import static org.assertj.core.api.Assertions.*;5@RunWith(JUnit4.class)6public class Test1 {7   public void test1() {8      AssertionMatcher<String> assertionMatcher = new AssertionMatcher<String>() {9         public void assertion(String s) {10            assertThat(s).isEqualTo("Hello World");11         }12      };13      assertThat("Hello World").matches(assertionMatcher);14   }15}16OK (1 test)

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