clunky, string typing, and subtle dependencies

ugly.go

func TestFoo(t *testing.T) {
	higherLevelCheck(t, someArgs{something})
	higherLevelCheck(t, someArgs{somethingElse})
}

func higherLevelCheck(t *testing.T, someArgs Args) {
	r, err := doSomething(someArgs)
	t.HelperAt("first err nil check")
	assert(t, err, nil)
	t.HelperAt("first value match check")
	assert(t, r.Something, expectedValue)
	z, err = somethingElse(someArgs)
	t.HelperAt("second err nil check")
	assert(t, err, nil)
	if foo(z) {
		t.Fatalf("higher level check failed")
	}
}

func assert(t *testing.T, got, want interface{}) {
	t.Helper()
	if !reflect.DeepEqual(want, got) {
		t.Fatalf("got = %v, want = %v", got, want)
	}
}