public void testGet() throws Exception {
        assertThat(map.get("ONE"), is("1"));
        assertThat(map.get("One"), is("1"));
        assertThat(map.get("hoge"), is(nullValue()));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testPut() throws Exception {
        assertThat(map.put("One", "11"), is("1"));
        assertThat(map.get("one"), is("11"));
    }

    /**
     * @throws Exception