[init-boolean-array] Initializing a Boolean Array in Java (#12813)

core-java-modules/core-java-arrays-operations-basic/src/test/java/com/baeldung/array/initbooleanarray/InitBooleanArrayUnitTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.array.initbooleanarray;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.assertArrayEquals;
+
+public class InitBooleanArrayUnitTest {
+    @Test
+    void whenInitPrimitiveBooleanArray_shouldGetExpectedArray() {
+        boolean[] expected = { false, false, false, false, false };
+        boolean[] myArray = new boolean[5];
+        assertArrayEquals(expected, myArray);
+    }
+
+    @Test
+    void whenInitPrimitiveBooleanArrayAndUseArrayFill_shouldGetExpectedArray() {
+        boolean[] expected = { true, true, true, true, true };
+        boolean[] myArray = new boolean[5];
+        Arrays.fill(myArray, true);
+        assertArrayEquals(expected, myArray);
+    }
+
+    @Test
+    void whenInitBooleanArray_shouldGetExpectedArray() {
+        Boolean[] expectedAllNull = { null, null, null, null, null };
+        Boolean[] myNullArray = new Boolean[5];
+        assertArrayEquals(expectedAllNull, myNullArray);
+
+        Boolean[] expectedAllFalse = { false, false, false, false, false };
+        Boolean[] myFalseArray = new Boolean[5];
+        Arrays.fill(myFalseArray, false);
+        assertArrayEquals(expectedAllFalse, myFalseArray);
+
+        Boolean[] expectedAllTrue = { true, true, true, true, true };
+        Boolean[] myTrueArray = new Boolean[5];
+        Arrays.fill(myTrueArray, true);
+        assertArrayEquals(expectedAllTrue, myTrueArray);
+    }
+}