feat: added tests turn on and turn off/pass

Author: haldanek

lesson_16/objects/objects_app/src/main/java/com/codedifferently/lesson16/KimberleeObject/HeadPhones.java

@@ -28,4 +28,12 @@ public boolean isWireless() {
   public String getBrandsArray() {
     return brands;
   }
+
+  public void turnOn() {
+    isPoweredOn = true;
+  }
+
+  public void turnOff() {
+    isPoweredOn = false;
+  }
 }

lesson_16/objects/objects_app/src/test/java/com/codedifferently/lesson16/KimberleeObjectTest/HeadPhonesTest.java

@@ -42,10 +42,22 @@ public void testDefaultState() {
     assertTrue(headphones.isWireless(), "HeadPhones should be wireless by default.");
     assertArrayEquals(new String[] {"Beats"}, new String[] {"Beats"});
   }
-  // Arrange
 
-  // Act
-
-  // Assert
+  @Test
+  public void testTurnOn() {
+    // Act
+    headphones.turnOn();
+    // Assert
+    assertTrue(headphones.isPoweredOn(), "Headphones should turn on after calling turnOn");
+  }
 
+  @Test
+  public void testTurnOff() {
+    // Arrange
+    headphones.turnOn();
+    // Act
+    headphones.turnOff();
+    // Assert
+    assertFalse(headphones.isPoweredOn(), "Headphones should turn off after calling");
+  }
 }