@Test
public void testConcat_Array() {

    Series<String> s1 = Series.forData("m", "n");
    Series<String> s2 = Series.forData("a", "b");
    Series<String> s3 = Series.forData("d");
    Series<String> c = SeriesConcat.concat(s1, s2, s3);
    new SeriesAsserts(c).expectData("m", "n", "a", "b", "d");
}