@Override @Test public void get() { Integer absentKey = this.size() + 1; String absentValue = String.valueOf(absentKey); // Absent key behavior ImmutableMap<Integer, String> classUnderTest = this.classUnderTest(); Assert.assertNull(classUnderTest.get(absentKey)); Assert.assertFalse(classUnderTest.containsValue(absentValue)); // Still unchanged Assert.assertEquals(this.equalUnifiedMap(), classUnderTest); }