// Check if it matches!
			errCode := doesPresignV2SignatureMatch(req)
			if errCode != testCase.expected {
				t.Errorf("(%d) expected to get %s, instead got %s", i, niceError(testCase.expected), niceError(errCode))
			}
		} else {
			err = preSignV2(req, accessKey, secretKey, now.Unix()+60)
			if err != nil {
				t.Fatalf("(%d) failed to preSignV2 http request, got %v", i, err)
			}

	for i, testCase := range testCases {
		_, code := doesPolicySignatureMatch(testCase.form)
		if code != testCase.expected {
			t.Errorf("(%d) expected to get %s, instead got %s", i, niceError(testCase.expected), niceError(code))
		}
	}
}

func TestDoesPresignedSignatureMatch(t *testing.T) {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	obj, fsDir, err := prepareFS(ctx)

	check("true", fmt.Sprintf("(*ET)(nil) != error(nil): %v", (*ET)(nil) != error(nil)))

	nilET := (*ET)(nil)
	nilError := error(nil)

	check("false", fmt.Sprintf("nilET == nilError: %v", nilET == nilError))
	check("true", fmt.Sprintf("nilET != nilError: %v", nilET != nilError))
}

func check(want, gotfull string) {
	got := gotfull[strings.Index(gotfull, ": ")+len(": "):]
	if got != want {