Hands-On Software Engineering with Golang

The best of both worlds

At the end of the day, nothing precludes us from combining these two approaches into a hybrid approach that gives us the best of both worlds: the terseness of table-driven tests and the selective targeting of subtests.

To achieve this, we need to define our table-driven specs, just like we did before. Following that, we iterate the spec list and spawn a subtest for each test case. Here's how we could adapt our FizzBuzz tests so that they follow this pattern:

func TestFizzBuzzTableDrivenSubtests(t *testing.T) {
    specs := []struct {
        descr, exp string
        input      int
    }{
        {descr: "evenly divisible by 3", input: 9, exp: "Fizz"},
        {descr: "evenly divisible by 3 and 5", input: 15, exp: "FizzBuzz"},
        {descr: "edge case", input: 0