[compByteArrays] Comparing Two Byte Arrays in Java (#13935)

core-java-modules/core-java-arrays-operations-basic/src/test/java/com/baeldung/array/compare/CompareByteArraysUnitTest.java

@@ -0,0 +1,39 @@
+package com.baeldung.array.compare;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.util.Arrays;
+
+import org.junit.jupiter.api.Test;
+
+public class CompareByteArraysUnitTest {
+    private final static String INPUT = "I am a magic string.";
+    private final static byte[] ARRAY1 = INPUT.getBytes();
+    private final static byte[] ARRAY2 = INPUT.getBytes();
+
+    @Test
+    void whenUsingEqualsSign_thenTwoArraysAreNotEqual() {
+        assertFalse(ARRAY1 == ARRAY2);
+    }
+
+    @Test
+    void whenUsingEquals_thenTwoArraysAreNotEqual() {
+        assertFalse(ARRAY1.equals(ARRAY2));
+    }
+
+    @Test
+    void whenUsingArrayEquals_thenTwoArraysAreEqual() {
+        assertTrue(Arrays.equals(ARRAY1, ARRAY2));
+    }
+
+    @Test
+    void whenComparingStringArrays_thenGetExpectedResult() {
+        String[] strArray1 = new String[] { "Java", "is", "great" };
+        String[] strArray2 = new String[] { "Java", "is", "great" };
+
+        assertFalse(strArray1 == strArray2);
+        assertFalse(strArray1.equals(strArray2));
+        assertTrue(Arrays.equals(strArray1, strArray2));
+    }
+}