Table Driven Tests

This is an example, a trivial example, to the test driven testing in golang.

func TestSumExampleInGo(t *testing.T) {
    var tests = []struct {
        first  int
        second int
        result int
    }{
        {2, 2, 4},
        {3, 2, 5},
    }

    for _, test := range tests {
        realSum := test.first + test.second
        if realSum != test.result {
            t.Error("wrong sum calculation")
        }
    }
}

Same thing using subtests

This is another way to test, introduced in Go 1.7.

func TestSumExampleInGo(t *testing.T) {
    var tests = []struct {
    first int
    second int
    result int
    }{
        {2, 2, 4},
        {3, 2, 5},
    }

    t.Run("say something", func(t *testing.T) {
        for _, test := range tests {
            realSum := test.first + test.second
            if realSum != test.result {    
                t.Error("wrong sum calculation")
            }
        }
    });
}