@Test
public void testFromReader() {

    StringReader r = new StringReader("A,B" + System.lineSeparator()
            + "1,2" + System.lineSeparator()
            + "3,4");
    DataFrame df = new CsvLoader().load(r);
    new DataFrameAsserts(df, "A", "B")
            .expectHeight(2)
            .expectRow(0, "1", "2")
            .expectRow(1, "3", "4");
}