// +build first package slice import "testing" func TestFirst(t *testing.T) { for _, test := range allTests { switch res, ok := First(test.n, test.s); { case !ok: if len(test.out) > 0 { t.Fatalf("First(%d, %s) returned !ok, want ok.", test.n, test.s) } case len(test.out) == 0: t.Fatalf("First(%d, %s) = %s, %t. Expected ok == false", test.n, test.s, res, ok) case res != test.out[0]: t.Fatalf("First(%d, %s) = %s. Want %s.", test.n, test.s, res, test.out[0]) } } }