How to use extracting method of org.assertj.core.api.AbstractObjectAssert class

Best Assertj code snippet using org.assertj.core.api.AbstractObjectAssert.extracting

Source:ObjectAssert_extracting_with_Function_Test.java

...30import org.assertj.core.util.introspection.PropertyOrFieldSupport;31import org.junit.jupiter.api.BeforeEach;32import org.junit.jupiter.api.Test;33/**34 * Tests for <code>{@link ObjectAssert#extracting(Function)}</code>.35 */36class ObjectAssert_extracting_with_Function_Test {37  private Employee luke;38  private static final Function<Employee, String> firstName = employee -> employee.getName().getFirst();39  @BeforeEach40  void setUp() {41    luke = new Employee(2L, new Name("Luke", "Skywalker"), 26);42  }43  @Test44  void should_allow_extracting_a_value_with_the_corresponding_type_using_a_single_lambda() {45    // WHEN46    AbstractObjectAssert<?, String> result = assertThat(luke).extracting(firstName);47    // THEN48    result.isEqualTo("Luke")49          .extracting(String::length).isEqualTo(4);50  }51  @Test52  void should_allow_extracting_a_value_with_the_corresponding_type_using_a_single_method_reference() {53    // WHEN54    AbstractObjectAssert<?, Integer> result = assertThat(luke).extracting(Employee::getAge);55    // THEN56    result.isEqualTo(26)57          .extracting(Integer::longValue).isEqualTo(26L);58  }59  @Test60  void should_rethrow_any_extractor_function_exception() {61    // GIVEN62    RuntimeException explosion = new RuntimeException("boom!");63    Function<Employee, Object> bomb = employee -> {64      throw explosion;65    };66    // WHEN67    Throwable error = catchThrowable(() -> assertThat(luke).extracting(bomb));68    // THEN69    then(error).isSameAs(explosion);70  }71  @Test72  void should_throw_a_NullPointerException_if_the_given_extractor_is_null() {73    // GIVEN74    Function<Employee, Object> extractor = null;75    // WHEN76    Throwable error = catchThrowable(() -> assertThat(luke).extracting(extractor));77    // THEN78    then(error).isInstanceOf(NullPointerException.class)79               .hasMessage(shouldNotBeNull("extractor").create());80  }81  @Test82  void extracting_should_honor_registered_comparator() {83    // GIVEN84    ObjectAssert<Employee> assertion = assertThat(luke).usingComparator(ALWAY_EQUALS);85    // WHEN86    AbstractObjectAssert<?, String> result = assertion.extracting(firstName);87    // THEN88    result.isEqualTo("YODA");89  }90  @Test91  void extracting_should_keep_assertion_state() {92    // GIVEN93    // not all comparators are used but we want to test that they are passed correctly after extracting94    AbstractObjectAssert<?, Employee> assertion = assertThat(luke).as("test description")95                                                                  .withFailMessage("error message")96                                                                  .withRepresentation(UNICODE_REPRESENTATION)97                                                                  .usingComparator(ALWAY_EQUALS)98                                                                  .usingComparatorForFields(ALWAY_EQUALS_STRING, "foo")99                                                                  .usingComparatorForType(ALWAY_EQUALS_STRING, String.class);100    // WHEN101    AbstractObjectAssert<?, ?> result = assertion.extracting(firstName);102    // THEN103    then(result.descriptionText()).isEqualTo("test description");104    then(result.info.overridingErrorMessage()).isEqualTo("error message");105    then(result.info.representation()).isEqualTo(UNICODE_REPRESENTATION);106    then(comparatorsByTypeOf(result).get(String.class)).isSameAs(ALWAY_EQUALS_STRING);107    then(comparatorByPropertyOrFieldOf(result).get("foo")).isSameAs(ALWAY_EQUALS_STRING);108    then(comparatorOf(result).getComparator()).isSameAs(ALWAY_EQUALS);109  }110  private static Objects comparatorOf(AbstractObjectAssert<?, ?> assertion) {111    return (Objects) PropertyOrFieldSupport.EXTRACTION.getValueOf("objects", assertion);112  }113  private static TypeComparators comparatorsByTypeOf(AbstractObjectAssert<?, ?> assertion) {114    return (TypeComparators) PropertyOrFieldSupport.EXTRACTION.getValueOf("comparatorByType", assertion);115  }...

Source:ConstraintViolationAssert.java

...16		super(violation, ConstraintViolationAssert.class);17	}18	public ConstraintViolationAssert<T> constraintIsTypeOfAnnotation(Class<? extends Annotation> typeOfAnnotation)19	{20		extracting("constraintDescriptor")21			.extracting("annotation")22			.as(23				"Checks violation for property path: [%s/%s]. Invalid value: [%s]",24				actual.getPropertyPath(), actual.getRootBeanClass().getSimpleName(),25				actual.getInvalidValue()26			)27			.isInstanceOf(typeOfAnnotation);28		return this;29	}30	public AbstractListAssert<31		?, List<? extends String>,32		String, ObjectAssert<String>33	>34	extractNameOfPropertyPath()35	{36		return Assertions.assertThat(actual.getPropertyPath())37			.extracting("name", String.class);38	}39	/**40	 * Gets the object of actual violation.41	 */42	public ConstraintViolation<T> getViolation()43	{44		return actual;45	}46}...

extracting

Using AI Code Generation

1assertThat("foo").isEqualTo("foo");2assertThat("foo").isEqualTo("foo");3assertThat("foo").isEqualTo("foo");4assertThat("foo").isEqualTo("foo");5assertThat("foo").isEqualTo("foo");6assertThat("foo").isEqualTo("foo");7assertThat("foo").isEqualTo("foo");8assertThat("foo").isEqualTo("foo");9assertThat("foo").isEqualTo("foo");10assertThat("foo").isEqualTo("foo");11assertThat("foo").isEqualTo("foo");12assertThat("foo").isEqualTo("foo");13assertThat("foo").isEqualTo("foo");14assertThat("foo").isEqualTo("foo");15assertThat("foo").isEqualTo("foo");16assertThat("

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2import org.assertj.core.api.Assertions;3public class 1 {4    public static void main(String[] args) {5        AbstractObjectAssert<?, ?> abstractObjectAssert = Assertions.assertThat("test");6        abstractObjectAssert.extracting("length").isEqualTo(4);7    }8}9import org.assertj.core.api.Assertions;10public class 2 {11    public static void main(String[] args) {12        Assertions.assertThat("test").extracting("length").isEqualTo(4);13    }14}15import org.assertj.core.api.ObjectAssert;16import org.assertj.core.api.Assertions;17public class 3 {18    public static void main(String[] args) {19        ObjectAssert<String> objectAssert = Assertions.assertThat("test");20        objectAssert.extracting("length").isEqualTo(4);21    }22}23import org.assertj.core.api.StringAssert;24import org.assertj.core.api.Assertions;25public class 4 {26    public static void main(String[] args) {27        StringAssert stringAssert = Assertions.assertThat("test");28        stringAssert.extracting("length").isEqualTo(4);29    }30}31import org.assertj.core.api.AbstractAssert;32import org.assertj.core.api.Assertions;33public class 5 {34    public static void main(String[] args) {35        AbstractAssert<?, ?> abstractAssert = Assertions.assertThat("test");36        abstractAssert.extracting("length").isEqualTo(4);37    }38}39import org.assertj.core.api.AbstractCharSequenceAssert;40import org.assertj.core.api.Assertions;41public class 6 {42    public static void main(String[] args) {43        AbstractCharSequenceAssert<?, ?> abstractCharSequenceAssert = Assertions.assertThat("test");44        abstractCharSequenceAssert.extracting("length").isEqualTo(4);45    }46}47import org.assertj.core.api.AbstractStringAssert;48import org.assertj.core.api.Assertions;49public class 7 {

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2import org.assertj.core.api.Assertions;3class Test {4    public static void main(String[] args) {5        String str = "Hello World";6        Assertions.assertThat(str).extracting("length").isEqualTo(11);7    }8}

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2import org.assertj.core.api.Assertions;3public class ObjectAssertExample {4    public static void main(String[] args) {5        AbstractObjectAssert<?, ?> abstractObjectAssert = Assertions.assertThat("abc");6        abstractObjectAssert.extracting("length").isEqualTo(3);7    }8}9import org.assertj.core.api.AbstractAssert;10import org.assertj.core.api.Assertions;11public class AssertExample {12    public static void main(String[] args) {13        AbstractAssert<?, ?> abstractAssert = Assertions.assertThat("abc");14        abstractAssert.extracting("length").isEqualTo(3);15    }16}

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2public class AssertJAssertThatExample {3    public static void main(String[] args) {4        String actual = "Hello World";5        AbstractObjectAssert<?, String> stringAbstractObjectAssert = assertThat(actual);6        stringAbstractObjectAssert.isEqualTo("Hello World");7        stringAbstractObjectAssert.isNotEqualTo("Hello");8        stringAbstractObjectAssert.isNotNull();9        stringAbstractObjectAssert.startsWith("Hello");10        stringAbstractObjectAssert.endsWith("World");11        stringAbstractObjectAssert.contains("World");12        stringAbstractObjectAssert.doesNotContain("Universe");13    }14}

extracting

Using AI Code Generation

1public class AssertJExtractingMethod {2    public static void main(String[] args) {3        List<String> list = Arrays.asList("Geeks", "for", "Geeks");4        Assertions.assertThat(list).extracting("length").contains(4, 3, 5);5    }6}

extracting

Using AI Code Generation

1import java.util.List;2import java.util.ArrayList;3import org.assertj.core.api.Assertions;4public class 1 {5    public static void main(String[] args) {6        List<People> people = new ArrayList<>();7        people.add(new People("John", 25));8        people.add(new People("Alex", 30));9        people.add(new People("Mike", 40));10        Assertions.assertThat(people)11                .extracting("name")12                .contains("Alex", "Mike");13    }14}

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2import org.junit.Test;3import static org.assertj.core.api.Assertions.assertThat;4public class Test1 {5    public void test1() {6        assertThat(new Person("John", 35))7                .extracting("name")8                .isEqualTo("John");9    }10}11	at org.junit.Assert.assertEquals(Assert.java:115)12	at org.junit.Assert.assertEquals(Assert.java:144)13	at Test1.test1(Test1.java:10)

extracting

Using AI Code Generation

1import org.assertj.core.api.AbstractObjectAssert;2import org.assertj.core.api.Assertions.*;3class ExtractingMethod {4    public static void main(String[] args) {5        Person person = new Person("John", "Doe");6        String lastName = assertThat(person).extracting("lastName").toString();7        System.out.println("Last Name: " + lastName);8    }9}10class Person {11    private String firstName;12    private String lastName;13    public Person(String firstName, String lastName) {14        this.firstName = firstName;15        this.lastName = lastName;16    }17    public String getFirstName() {18        return firstName;19    }20    public String getLastName() {21        return lastName;22    }23}

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