Common setup code in Go tests

testwithsetupandteardown.go

func TestDoTheThing(t *testing.T) {
  
  cases := map[string]struct{
    thingArg string
    want bool
  }{
    // Add test cases here.
  }

  SetupTheThing()
  
  for name, tc := range cases {
    t.Run(name, func(t *testing.T) {
      got := DoTheThing(tc.thingArg)
      if diff := cmp.Diff(tc.want, got); diff != "" {
        t.Errorf("Test failed: %s", diff)
      }
    }
  }
  
  TeardownTheThing()
}