在JUnit参数化测试中使用枚举的所有值

Question

I've found some examples how to use enum values in JUnit parameterized tests like this:

enum Colors {
  GREEN,
  RED,
  ORANGE
}

@Parameters
public static Collection<Object[]> data() {
  return Arrays.asList(new Object[][] {
    // How to use the complete enum here?
    {Colors.GREEN},
    {Colors.RED},
    {Colors.ORANGE},
  });
}

How can I use the complete enum in the return statement so that the test is run for each value of the enum?

Answer 1

Use the values() method :

Colors[] values = Colors.values();

List<Object[]> data = new ArrayList<>(values.length);
for (Colors color : values) { data.add(new Object[] { color }); }
return data;

Note that by normal convention the enum's name should be Color , not Colors : look at the enums in the standard library.