source: class CompactHashMapClassTest {
  
      @Test
      public void containsKeyOnNonExistingKey() {
  
target:         CompactHashMapDefaultValues.add("k1", "v1");
          CompactHashMap<String, Object> map = new CompactHashMap<String, Object>();
          Assert.assertFalse(map.containsKey("abcd"));
          Assert.assertFalse(map.containsKey("k1"));
      }
  
  }