if err != nil {
		t.Fatal(err)
	}
	// PutObjectPart should succeed even if part already exists. ref: https://github.com/minio/minio/issues/1930
	_, err = objLayer.PutObjectPart(ctx, "bucket1", "mpartObj1", res.UploadID, 1, mustGetPutObjReader(t, bytes.NewReader(fiveMBBytes), 5*humanize.MiByte, md5Hex, ""), opts)

	{
		_, err = obj.PutObject(context.Background(), "bucket", "newPrefix", mustGetPutObjReader(t, bytes.NewBufferString(uploadContent), int64(len(uploadContent)), "", ""), opts)
		if err != nil {
			t.Fatalf("%s: <ERROR> %s", instanceType, err)
		}
		_, err = obj.PutObject(context.Background(), "bucket", "newPrefix2", mustGetPutObjReader(t, bytes.NewBufferString(uploadContent), int64(len(uploadContent)), "", ""), opts)
		if err != nil {

	if err != nil {
		t.Fatal(err)
	}

	oi1, err := obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), length, "", ""), ObjectOptions{})
	if err != nil {
		t.Fatal(err)
	}
	// 2nd version.
	_, _ = rand.Read(data)
	oi2, err := obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), length, "", ""), ObjectOptions{})
	if err != nil {
		t.Fatal(err)
	}

			inputMeta:     map[string]string{"etag": "e2fc714c4727ee9395f324cd2e7f331f", "x-amz-checksum-crc32": "abcd"},
			inputDataSize: int64(len("abcd")),
		},
	}
	for i, testCase := range testCases {
		in := mustGetPutObjReader(t, bytes.NewReader(testCase.inputData), testCase.inputDataSize, testCase.inputMeta["etag"], testCase.inputSHA256)

	if err != nil {
		t.Fatal(err)
	}

	for i, test := range testCases {
		test := test
		t.Run(fmt.Sprintf("case-%d", i), func(t *testing.T) {
			_, err = obj.PutObject(ctx, bucket, object, mustGetPutObjReader(t, bytes.NewReader(data), int64(len(data)), "", ""), ObjectOptions{})
			if err != nil {
				t.Fatalf("Failed to putObject %v", err)
			}

	}
	for _, object := range testObjects {
		md5Bytes := md5.Sum([]byte(object.content))
		_, err = obj.PutObject(context.Background(), object.parentBucket, object.name, mustGetPutObjReader(t, bytes.NewBufferString(object.content),
			int64(len(object.content)), hex.EncodeToString(md5Bytes[:]), ""), ObjectOptions{
			Versioned:   globalBucketVersioningSys.PrefixEnabled(object.parentBucket, object.name),

	}

	// Validate all the test cases.
	for i, testCase := range testCases {
		actualInfo, actualErr := obj.PutObjectPart(context.Background(), testCase.bucketName, testCase.objName, testCase.uploadID, testCase.PartID, mustGetPutObjReader(t, bytes.NewBufferString(testCase.inputReaderData), testCase.inputDataSize, testCase.inputMd5, testCase.inputSHA256), opts)
		// All are test cases above are expected to fail.
		if actualErr != nil && testCase.shouldPass {

	}
	// iterate through the above set of inputs and upload the object.
	for i, input := range putObjectInputs {
		// uploading the object.
		_, err := obj.PutObject(context.Background(), input.bucketName, input.objectName, mustGetPutObjReader(t, bytes.NewReader(input.textData), input.contentLength, input.metaData[""], ""), ObjectOptions{UserDefined: input.metaData})
		// if object upload fails stop the test.
		if err != nil {

func testRemoveBucketHandler(obj ObjectLayer, instanceType, bucketName string, apiRouter http.Handler,
	credentials auth.Credentials, t *testing.T,
) {
	_, err := obj.PutObject(GlobalContext, bucketName, "test-object", mustGetPutObjReader(t, bytes.NewReader([]byte{}), int64(0), "", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"), ObjectOptions{})
	// if object upload fails stop the test.
	if err != nil {

		17 + // ";chunk-signature="
		64 + // e.g. "f2ca1bb6c7e907d06dafe4687e579fce76b37e4e93b7605022da52e6ccc26fd2"
		2 + // CRLF
		chunkDataSize +
		2 // CRLF
}

func mustGetPutObjReader(t TestErrHandler, data io.Reader, size int64, md5hex, sha256hex string) *PutObjReader {
	hr, err := hash.NewReader(context.Background(), data, size, md5hex, sha256hex, size)
	if err != nil {
		t.Fatal(err)
	}