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

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

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...879 */​880 @CheckReturnValue881 @SafeVarargs882 public final AbstractListAssert<?, List<?>, Object, ObjectAssert<Object>> extracting(Function<? super ACTUAL, ?>... extractors) {883 return extractingForProxy(extractors);884 }885 /​/​ This method is protected in order to be proxied for SoftAssertions /​ Assumptions.886 /​/​ The public method for it (the one not ending with "ForProxy") is marked as final and annotated with @SafeVarargs887 /​/​ in order to avoid compiler warning in user code888 protected AbstractListAssert<?, List<?>, Object, ObjectAssert<Object>> extractingForProxy(Function<? super ACTUAL, ?>[] extractors) {889 requireNonNull(extractors, shouldNotBeNull("extractors")::create);890 List<Object> values = Stream.of(extractors)891 .map(extractor -> extractor.apply(actual))892 .collect(toList());893 return newListAssertInstance(values).withAssertionState(myself);894 }895 /​**896 * Uses the given {@link Function} to extract a value from the object under test, the extracted value becoming the new object under test.897 * <p>898 * Note that since the value is extracted as an Object, only Object assertions can be chained after extracting.899 * <p>900 * Example:901 * <pre><code class='java'> /​/​ Create frodo, setting its name, age and Race902 * TolkienCharacter frodo = new TolkienCharacter(&quot;Frodo&quot;, 33, HOBBIT);...

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extractingForProxy

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1 public void extractingForProxy() {2 String[] names = {"John", "Jane", "Adam", "Tom"};3 List<Person> people = Arrays.asList(new Person(names[0]), new Person(names[1]), new Person(names[2]), new Person(names[3]));4 List<String> extractedNames = assertThat(people)5 .extractingForProxy("name")6 .asList();7 assertThat(extractedNames).containsExactly(names);8 }9}10import java.util.Objects;11public class Person {12 private final String name;13 public Person(String name) {14 this.name = name;15 }16 public String getName() {17 return name;18 }19 public String toString() {20 return "Person{" +21 '}';22 }23 public boolean equals(Object o) {24 if (this == o) return true;25 if (o == null || getClass() != o.getClass()) return false;26 Person person = (Person) o;27 return Objects.equals(name, person.name);28 }29 public int hashCode() {30 return Objects.hash(name);31 }32}33import org.assertj.core.api.AbstractAssert;34import org.assertj.core.api.AbstractObjectAssert;35public class PersonAssert extends AbstractAssert<PersonAssert, Person> {36 public PersonAssert(Person actual) {37 super(actual, PersonAssert.class);38 }39 public static PersonAssert assertThat(Person actual) {40 return new PersonAssert(actual);41 }42 public PersonAssert hasName(String name) {43 isNotNull();44 AbstractObjectAssert<?, String> nameAssert = assertThat(actual.getName());45 nameAssert.overridingErrorMessage("Expected name to be <%s> but was <%s>", name, actual.getName()).isEqualTo(name);46 return this;47 }48}49import org.junit.Test;50import java.util.Arrays;51import java.util.List;52import static org.assertj.core.api.Assertions.assertThat;53public class PersonAssertTest {54 public void testAssert() {55 String[] names = {"John", "Jane", "Adam", "Tom"};56 List<Person> people = Arrays.asList(new Person(names[0]), new Person(names[1]), new Person(names[2]), new Person(names[3]));57 for (Person person : people) {58 PersonAssert.assertThat(person)59 .hasName(person.getName

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extractingForProxy

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1package com.journaldev.junit;2import static org.assertj.core.api.Assertions.assertThat;3import java.util.ArrayList;4import java.util.List;5import org.junit.Test;6public class AssertJTest {7 public void testAssertJ() {8 List<String> list = new ArrayList<>();9 list.add("a");10 list.add("b");11 list.add("c");12 list.add("d");13 list.add("e");14 list.add("f");15 assertThat(list)16 .extractingForProxy("size")17 .contains(6);18 }19}20 at org.junit.Assert.assertEquals(Assert.java:115)21 at org.junit.Assert.assertEquals(Assert.java:144)22 at org.assertj.core.api.AbstractListAssert.contains(AbstractListAssert.java:184)23 at org.assertj.core.api.AbstractListAssert.contains(AbstractListAssert.java:39)24 at com.journaldev.junit.AssertJTest.testAssertJ(AssertJTest.java:23)25 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)26 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)27 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)28 at java.lang.reflect.Method.invoke(Method.java:498)29 at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)30 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)31 at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)32 at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)33 at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)34 at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)35 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)36 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)37 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)38 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)

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extractingForProxy

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1 public void extractingForProxyTest() {2 assertThat(new Person()).extractingForProxy("name").isEqualTo("John Doe");3 }4 public void extractingForProxyTest2() {5 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);6 }7 public void extractingForProxyTest3() {8 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);9 }10 public void extractingForProxyTest4() {11 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);12 }13 public void extractingForProxyTest5() {14 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);15 }16 public void extractingForProxyTest6() {17 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);18 }19 public void extractingForProxyTest7() {20 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);21 }22 public void extractingForProxyTest8() {23 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);24 }25 public void extractingForProxyTest9() {26 assertThat(new Person()).extractingForProxy("name", "age").contains("John Doe", 33);27 }28 public void extractingForProxyTest10() {

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extractingForProxy

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1import org.assertj.core.api.Assertions;2import java.util.List;3class AssertionsExtractingTest {4 public void testExtractingForProxy() {5 Person person = new Person("John", 30);6 Assertions.assertThat(person)7 .extractingForProxy("name", String.class)8 .isEqualTo("John");9 Assertions.assertThat(person)10 .extractingForProxy("name", String.class)11 .isNotEqualTo("Jane");12 Assertions.assertThat(person)13 .extractingForProxy("age", Integer.class)14 .isEqualTo(30);15 Assertions.assertThat(person)16 .extractingForProxy("age", Integer.class)17 .isNotEqualTo(31);18 }19 public void testExtracting() {20 List<Person> people = List.of(21 new Person("John", 30),22 new Person("Jane", 31)23 );24 Assertions.assertThat(people)25 .extracting("name")26 .containsExactly("John", "Jane");27 Assertions.assertThat(people)28 .extracting("name")29 .doesNotContainExactly("John", "Jane");30 Assertions.assertThat(people)31 .extracting("age")32 .containsExactly(30, 31);33 Assertions.assertThat(people)34 .extracting("age")35 .doesNotContainExactly(30, 31);36 }37 private static class Person {38 private final String name;39 private final int age;40 public Person(String name, int age) {41 this.name = name;42 this.age = age;43 }44 public String getName() {45 return name;46 }47 public int getAge() {48 return age;49 }50 }51}

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