KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta 
How to use getComparatorBasedObjectAssertions method of org.assertj.core.api.AbstractObjectAssert class
Best Assertj code snippet using org.assertj.core.api.AbstractObjectAssert.getComparatorBasedObjectAssertions
Source:AbstractObjectAssert.java 
...1070 * @see #usingComparatorForType(Comparator, Class)1071 */1072 public <T> SELF returns(T expected, Function<ACTUAL, T> from) {1073 requireNonNull(from, "The given getter method/Function must not be null");1074 Objects objects = getComparatorBasedObjectAssertions(expected.getClass());1075 objects.assertEqual(info, from.apply(actual), expected);1076 return myself;1077 }1078 /**1079 * Verifies that the object under test does not return the given expected value from the given {@link Function},1080 * a typical usage is to pass a method reference to assert object's property.1081 * <p>1082 * Wrapping the given {@link Function} with {@link Assertions#from(Function)} makes the assertion more readable.1083 * <p>1084 * The assertion supports custom comparators, configurable with {@link #usingComparatorForType(Comparator, Class)}.1085 * <p>1086 * Example:1087 * <pre><code class="java"> // from is not mandatory but it makes the assertions more readable1088 * assertThat(frodo).doesNotReturn("Bilbo", from(TolkienCharacter::getName))1089 * .doesNotReturn("Bilbo", TolkienCharacter::getName) // no from :(1090 * .doesNotReturn(null, from(TolkienCharacter::getRace));</code></pre>1091 *1092 * @param expected the value the object under test method's call should not return.1093 * @param from {@link Function} used to acquire the value to test from the object under test. Must not be {@code null}1094 * @param <T> the expected value type the given {@code method} returns.1095 * @return {@code this} assertion object.1096 * @throws NullPointerException if given {@code from} function is null1097 *1098 * @since 3.22.01099 * @see #usingComparatorForType(Comparator, Class)1100 */1101 public <T> SELF doesNotReturn(T expected, Function<ACTUAL, T> from) {1102 requireNonNull(from, "The given getter method/Function must not be null");1103 Objects objects = getComparatorBasedObjectAssertions(expected.getClass());1104 objects.assertNotEqual(info, from.apply(actual), expected);1105 return myself;1106 }1107 private Objects getComparatorBasedObjectAssertions(Class<?> type) {1108 TypeComparators comparatorsByType = getComparatorsByType();1109 if (comparatorsByType.hasComparatorForType(type)) {1110 return new Objects(new ComparatorBasedComparisonStrategy(comparatorsByType.getComparatorForType(type)));1111 }1112 return objects;1113 }1114 /**1115 * Enable using a recursive field by field comparison strategy when calling the chained {@link RecursiveComparisonAssert#isEqualTo(Object) isEqualTo} assertion.1116 * <p>1117 * The detailed documentation is available here: <a href="https://assertj.github.io/doc/#assertj-core-recursive-comparison">https://assertj.github.io/doc/#assertj-core-recursive-comparison</a>.1118 * <p>1119 * Example:1120 * <pre><code class='java'> public class Person {1121 * String name;...
getComparatorBasedObjectAssertions
Using AI Code Generation
1public class AssertJTest {2 public static void main(String[] args) {3 Object o1 = new Object();4 Object o2 = new Object();5 Assertions.assertThat(o1).usingComparator(new Comparator<Object>() {6 public int compare(Object o1, Object o2) {7 return 0;8 }9 }).isEqualTo(o2);10 }11}
getComparatorBasedObjectAssertions
Using AI Code Generation
1public class ComparatorBasedObjectAssertionsTest {2 public void test() {3 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions = Assertions.getComparatorBasedObjectAssertions();4 Assertions.assertThat(comparatorBasedObjectAssertions).isNotNull();5 }6}
getComparatorBasedObjectAssertions
Using AI Code Generation
1import static org.assertj.core.api.Assertions.assertThat;2import static org.assertj.core.api.Assertions.getComparatorBasedObjectAssertions;3import static org.assertj.core.api.Assertions.within;4import static org.assertj.core.api.Assertions.withinPercentage;5import static org.assertj.core.data.Percentage.withPercentage;6import static org.assertj.core.util.Lists.newArrayList;7import static org.junit.Assert.assertEquals;8import java.util.Comparator;9import java.util.List;10import org.assertj.core.api.ComparatorBasedObjectAssertions;11import org.assertj.core.api.ObjectAssert;12import org.assertj.core.data.Percentage;13import org.junit.Test;14public class ComparatorBasedObjectAssertionsTest {15 public void testComparatorBasedObjectAssertions() {16 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions = getComparatorBasedObjectAssertions();17 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions2 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());18 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions3 = comparatorBasedObjectAssertions.usingComparator(Comparator.naturalOrder());19 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions4 = comparatorBasedObjectAssertions.usingDefaultComparator();20 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions5 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());21 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions6 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());22 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions7 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());23 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions8 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());24 ComparatorBasedObjectAssertions comparatorBasedObjectAssertions9 = comparatorBasedObjectAssertions.withComparator(Comparator.naturalOrder());
getComparatorBasedObjectAssertions
Using AI Code Generation
1public AbstractObjectAssert<?, T> getComparatorBasedObjectAssertions(Comparator<? super T> comparator)2package org.kodejava.example.assertj;3import org.assertj.core.api.Assertions;4import org.assertj.core.api.ComparableAssert;5import java.util.Comparator;6public class AbstractObjectAssertDemo {7 public static void main(String[] args) {8 Assertions.assertThat("Hello").usingComparator(9 new Comparator<String>() {10 public int compare(String o1, String o2) {11 return o1.length() - o2.length();12 }13 });14 assertion.isEqualTo("Hello");15 }16}17Share on Skype (Opens in new window)
getComparatorBasedObjectAssertions
Using AI Code Generation
1public class AssertJExample {2 public static void main(String[] args) {3 List<Integer> list = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5, 6));4 Comparator<Integer> comparator = (o1, o2) -> o1 % 2 - o2 % 2;5 AbstractObjectAssert<?, List<Integer>> objectAssert = Assertions.getComparatorBasedObjectAssertions(list, comparator);6 objectAssert.isEqualTo(Arrays.asList(2, 4, 6, 1, 3, 5));7 }8}9at org.assertj.core.api.AbstractObjectAssert.isEqualTo(AbstractObjectAssert.java:80)10at org.assertj.core.api.AbstractObjectAssert.isEqualTo(AbstractObjectAssert.java:74)11at org.assertj.core.api.AbstractObjectAssert.isEqualTo(AbstractObjectAssert.java:37)12at AssertJExample.main(AssertJExample.java:27)
getComparatorBasedObjectAssertions
Using AI Code Generation
1import org.junit.Test;2import static org.assertj.core.api.Assertions.*;3public class AssertjAssertionsTest {4 public void test() {5 assertThat("test").isEqualTo("test");6 }7}
getComparatorBasedObjectAssertions
Using AI Code Generation
1public void testGetComparatorBasedObjectAssertions() {2 Object o1 = new Object();3 Object o2 = new Object();4 Comparator<Object> comparator = new Comparator<Object>() {5 public int compare(Object o1, Object o2) {6 return 0;7 }8 };9 AbstractObjectAssert<?, ?> objectAssert = Assertions.assertThat(o1);10 AbstractObjectAssert<?, ?> objectAssert2 = objectAssert.usingComparator(comparator);11 objectAssert2.isEqualTo(o2);12}13 at org.assertj.core.api.AbstractObjectAssert.isEqualTo(AbstractObjectAssert.java:145)14 at org.assertj.core.api.AbstractObjectAssert.isEqualTo(AbstractObjectAssert.java:141)15 at com.baeldung.assertj.objectasserts.ObjectAssertsIntegrationTest.testGetComparatorBasedObjectAssertions(ObjectAssertsIntegrationTest.java:69)
Automation Testing Tutorials
Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.
LambdaTest Learning Hubs:
- JUnit Tutorial
- TestNG Tutorial
- Webdriver Tutorial
- WebDriverIO Tutorial
- Protractor Tutorial
- Selenium 4 Tutorial
- Jenkins Tutorial
- NUnit Tutorial
- Jest Tutorial
- Playwright Tutorial
- Cypress Tutorial
- PyTest Tutorial
YouTube
You could also refer to video tutorials over LambdaTest YouTube channel to get step by step demonstration from industry experts.
Run Assertj automation tests on LambdaTest cloud grid
Perform automation testing on 3000+ real desktop and mobile devices online.
Most used method in AbstractObjectAssert
- AbstractObjectAssert
- isEqualToIgnoringNullFields
- isEqualToComparingOnlyGivenFields
- isEqualToIgnoringGivenFields
- hasNoNullFieldsOrProperties
- hasAllNullFieldsOrProperties
- hasNoNullFieldsOrPropertiesExcept
- hasAllNullFieldsOrPropertiesExcept
- isEqualToComparingFieldByField
- getComparatorsByType
- compare
- usingComparatorForFields
- usingComparatorForType
- getName
- hasFieldOrProperty
- hasFieldOrPropertyWithValue
- hasOnlyFields
- extracting
- extractingForProxy
- Home
- Address
- isEqualToComparingFieldByFieldRecursively
- returns
- doesNotReturn
- getComparatorBasedObjectAssertions
- usingRecursiveComparison
- usingRecursiveAssertion
- newObjectAssert
Try LambdaTest Now !!
Get 100 minutes of automation test minutes FREE!!
Was this article helpful?
