TestNG: More than one @DataProvider for one @Test

Question

I\'m using TestNG for Eclipse.

Is it possible to give two data providers step by step to the same test-function?

I co

Answer 1

    @DataProvider
    public Object[][] combinedDataProvider() {
        return Stream.of(dp1(), dp2())
                .flatMap(Arrays::stream)
                .toArray(Object[][]::new);
    }

Answer 2

Please refer to this answer:

TestNG using multiple DataProviders with single Test method

It is much cleaner and will work for more complex things.

Maybe someone will need it too, I rewrote this method public static T[] concatAll(T[] first, T[]... rest) in a different way:

public static Object[] concat(Object[] first, Object[] second) {
    Object[] result = ArrayUtils.addAll(first, second);
    return result;
}

Answer 3

No, but nothing stops you from merging these two data providers into one and specifying that one as your data provider:

public Object[][] dp1() {
  return new Object[][] {
      new Object[] { "a", "b" },
      new Object[] { "c", "d" },
  };
}

public Object[][] dp2() {
  return new Object[][] {
      new Object[] { "e", "f" },
      new Object[] { "g", "h" },
  };
}

@DataProvider
public Object[][] dp() {
  List<Object[]> result = Lists.newArrayList();
  result.addAll(Arrays.asList(dp1()));
  result.addAll(Arrays.asList(dp2()));
  return result.toArray(new Object[result.size()][]);
}

@Test(dataProvider = "dp")
public void f(String a, String b) {
  System.out.println("f " + a + " " + b);
}

Answer 4

Yes,

You can write @Test(dataProvider="name_of_first_dataprovider,name_of_second_dataprovider")