    @Test
    public void map1stMatchingTagNames_matching() {

        assertThat(DataProxy.map1stMatchingTagNames(pack, "tag1"), is(pack.tags.getText("tag1")));
        assertThat(DataProxy.map1stMatchingTagNames(pack, "tag2"), is(pack.tags.getText("tag2")));
        assertThat(DataProxy.map1stMatchingTagNames(pack, "tag1,tag2"), is(pack.tags.getText("tag1")));
        assertThat(DataProxy.map1stMatchingTagNames(pack, "tag2,tag1"), is(pack.tags.getText("tag2")));
        assertThat(DataProxy.map1stMatchingTagNames(pack, "tagX,tag1"), is(pack.tags.getText("tag1")));
        assertThat(DataProxy.map1stMatchingTagNames(pack, "tagX,tag2,tag3"), is(pack.tags.getText("tag2")));
    }