// credentials are necessary to sign the HTTP request.
	if err = newTestConfig(globalMinioDefaultRegion, obj); err != nil {
		t.Fatalf("Unable to initialize server config. %s", err)
	}

	defer removeRoots(fsDirs)

	z := obj.(*erasureServerPools)
	er := z.serverPools[0].sets[0]

	// Create "bucket"
	err = obj.MakeBucket(ctx, "bucket", MakeBucketOptions{})
	if err != nil {
		t.Fatal(err)
	}

		formattedDisks = z.serverPools[0].GetDisks(0)()
	}

	// Success.
	return objLayer, formattedDisks, nil
}

// removeRoots - Cleans up initialized directories during tests.
func removeRoots(roots []string) {
	for _, root := range roots {
		os.RemoveAll(root)
	}
}

// creates a bucket for the tests and returns the bucket name.

	defer cancel()

	obj, disks, err := prepareErasure16(ctx)
	if err != nil {
		t.Fatalf("Prepare Erasure backend failed - %v", err)
	}
	setObjectLayer(obj)
	defer obj.Shutdown(context.Background())
	defer removeRoots(disks)

	type tamperKind int
	const (
		noTamper tamperKind = iota
		deletePart
		corruptPart
	)

	timeSentinel := time.Unix(1, 0).UTC()
	threeNanoSecs := time.Unix(3, 0).UTC()

}

func TestDoesPolicySignatureMatch(t *testing.T) {
	_, fsDir, err := prepareFS(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	defer removeRoots([]string{fsDir})

	credentialTemplate := "%s/%s/%s/s3/aws4_request"
	now := UTCNow()
	accessKey := globalActiveCred.AccessKey

	testCases := []struct {
		form     http.Header
		expected APIErrorCode
	}{