Parameterized Test with two Arguments in JUnit 5 jupiter

Question

How can I write a parameterized test with two arguments in JUnit 5 jupiter? The following does not work (compile error):

@ParameterizedTest @ValueSource(strings = { "a", "b", "foo" }) @ValueSource(ints = { 1, 2, 3 }) public void test(String arg1, int arg2) {...} 

Answer 1

Here are two possibilities to achieve these multi argument test method calls.

The first (testParameters) uses a CsvSource to which you provide a comma separated list (the delimiter is configurable) and the type casting is done automatically to your test method parameters.

The second (testParametersFromMethod) uses a method (provideParameters) to provide the needed data.

@ParameterizedTest @CsvSource({"a,1", "b,2", "foo,3"}) public void testParameters(String name, int value) {     System.out.println("csv data " + name + " value " + value); }  @ParameterizedTest @MethodSource("provideParameters") public void testParametersFromMethod(String name, int value) {     System.out.println("method data " + name + " value " + value); }  private static Stream<Arguments> provideParameters() {     return Stream.of(             Arguments.of("a", 1),             Arguments.of("b", 2),             Arguments.of("foo", 3)     ); } 

The output of these test methods are:

Running ParameterTest csv data a value 1 csv data b value 2 csv data foo value 3 method data a value 1 method data b value 2 method data foo value 3