assertThat(map.size(), is(1));
        assertThat(map.remove("dummy"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPutAll() throws Exception {
        final Map<String, String> m = new HashMap<String, String>();
        m.put("three", "3");
        m.put("four", "4");
        map.putAll(m);
        assertThat(map.get("THREE"), is("3"));

        assertThat(m.get("2"), is(nullValue()));
        assertThat(m.getAt(0), is("d"));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPutAll() throws Exception {
        Map<String, String> m = new HashMap<String, String>();
        m.put("3", "test3");
        m.put("4", "test4");
        map.putAll(m);
        assertThat(map.get("3"), is("test3"));