@Test
    public void test2() {
    	System.err.println("test2");
        // Xga܂܂邩
        assertThat(sample, hasItem("a"));

        // Xgab܂܂邩
        assertThat(sample, hasItems("a", "b"));

        // Xg̑SĂ̗vfełȂ
        assertThat(sample, everyItem(is(not("e"))));
    }