ctx_.get(), B_vals, B_dims, 2, &B_raw);
    ASSERT_EQ(errors::OK, s.code()) << s.message();
    B.reset(B_raw);
  }

  float expected_dA[4] = {-.5f, 2.0f, -.5f, 2.0f};
  ASSERT_NO_FATAL_FAILURE(CompareNumericalAndManualGradients(
      MatMulModel, ctx_.get(), {A.get(), B.get()}, 0, expected_dA, 4,
      UseFunction()));
}

TEST_P(GradientCheckerTest, TestMul) {
  AbstractTensorHandlePtr x;
  {

			expectedError: hash.BadDigest{ExpectedMD5: invalidMD5, CalculatedMD5: getMD5Hash(nilBytes)},
		},
		25: {
			bucketName: bucket, objName: object, inputData: fiveMBBytes, inputMeta: invalidMD5Header, inputDataSize: int64(len(fiveMBBytes)), expectedMd5: getMD5Hash(fiveMBBytes),
			expectedError: hash.BadDigest{ExpectedMD5: invalidMD5, CalculatedMD5: getMD5Hash(fiveMBBytes)},

}

// BadDigest - Content-MD5 you specified did not match what we received.
type BadDigest struct {
	ExpectedMD5   string
	CalculatedMD5 string
}

func (e BadDigest) Error() string {
	return "Bad digest: Expected " + e.ExpectedMD5 + " does not match calculated " + e.CalculatedMD5
}

// SizeTooSmall reader size too small
type SizeTooSmall struct {
	Want int64
	Got  int64
}

		t.Errorf("Expected size 4, got %d", r.Size())
	}
	if r.ActualSize() != 4 {
		t.Errorf("Expected size 4, got %d", r.ActualSize())
	}
	expectedMD5, err := hex.DecodeString("e2fc714c4727ee9395f324cd2e7f331f")
	if err != nil {
		t.Fatal(err)
	}
	if !bytes.Equal(r.MD5Current(), expectedMD5) {
		t.Errorf("Expected md5hex \"e2fc714c4727ee9395f324cd2e7f331f\", got %s", hex.EncodeToString(r.MD5Current()))
	}

	MD5, err := hex.DecodeString(md5Hex)
	if err != nil {
		return nil, BadDigest{ // TODO(aead): Return an error that indicates that an invalid ETag has been specified
			ExpectedMD5:   md5Hex,
			CalculatedMD5: "",
		}
	}
	SHA256, err := hex.DecodeString(sha256Hex)
	if err != nil {

		inputReaderData string
		inputMd5        string
		inputSHA256     string
		inputDataSize   int64
		// flag indicating whether the test should pass.
		shouldPass bool
		// expected error output.
		expectedMd5   string
		expectedError error
	}{
		// Test case  1-4.
		// Cases with invalid bucket name.
		{bucketName: ".test", objName: "obj", PartID: 1, expectedError: fmt.Errorf("%s", "Bucket name invalid: .test")},