Merge pull request #9854 from vishal1023/master

AssertEquals 2 Lists ignore order

testing-modules/testing-assertions/pom.xml

@@ -18,11 +18,45 @@
             <artifactId>logback-classic</artifactId>
             <version>1.2.3</version>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.6.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.6.2</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.15.0</version>
+            <version>3.16.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-all</artifactId>
+            <version>1.3</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-collections4</artifactId>
+            <version>4.4</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.22.1</version>
+            </plugin>
+        </plugins>
+    </build>
 </project>

testing-modules/testing-assertions/src/test/java/com/baeldung/listassert/OrderAgnosticListComparisonUnitTest.java

@@ -0,0 +1,54 @@
+package com.baeldung.listassert;
+
+import org.apache.commons.collections4.CollectionUtils;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class OrderAgnosticListComparisonUnitTest {
+
+    private final List<Integer> first = Arrays.asList(1, 3, 4, 6, 8);
+    private final List<Integer> second = Arrays.asList(8, 1, 6, 3, 4);
+    private final List<Integer> third = Arrays.asList(1, 3, 3, 6, 6);
+
+    @Test
+    public void whenTestingForOrderAgnosticEquality_ShouldBeTrue() {
+        assertTrue(first.size() == second.size() && first.containsAll(second) && second.containsAll(first));
+    }
+
+    @Test
+    public void whenTestingForOrderAgnosticEquality_ShouldBeFalse() {
+        assertFalse(first.size() == third.size() && first.containsAll(third) && third.containsAll(first));
+    }
+
+    @Test
+    public void whenTestingForOrderAgnosticEquality_ShouldBeEqual() {
+        MatcherAssert.assertThat(first, Matchers.containsInAnyOrder(second.toArray()));
+    }
+
+    @Test
+    public void whenTestingForOrderAgnosticEquality_ShouldBeTrueIfEqualOtherwiseFalse() {
+        assertTrue(CollectionUtils.isEqualCollection(first, second));
+        assertFalse(CollectionUtils.isEqualCollection(first, third));
+    }
+
+    @Test
+    void whenTestingForOrderAgnosticEqualityBothList_ShouldBeEqual() {
+        assertThat(first).hasSameElementsAs(second);
+    }
+
+    @Test
+    void whenTestingForOrderAgnosticEqualityBothList_ShouldNotBeEqual() {
+        List<String> a = Arrays.asList("a", "a", "b", "c");
+        List<String> b = Arrays.asList("a", "b", "c");
+
+        assertThat(a).hasSameElementsAs(b);
+    }
+}