source: class BubbleCacheTest {
  
      private BubbleCache bubbleCacheUnderTest;
  
      @Test
      public void testAddBubble() {
  
target:         // Setup
          final String key = "key";
          final BubbleMessage bubbleMessage = mock(BubbleMessage.class);
  
          // Run the test
          bubbleCacheUnderTest.addBubble(key, bubbleMessage);
  
          // Verify the results
          assertEquals(bubbleCacheUnderTest.getBubble(key).get(), bubbleMessage);
      }
  
  }