[refactor] Split up a large (5k lines) unit-test into multiple files.

content/child/webcrypto/test/test_helpers.h

Index: content/child/webcrypto/test/test_helpers.h
diff --git a/content/child/webcrypto/test/test_helpers.h b/content/child/webcrypto/test/test_helpers.h
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_CHILD_WEBCRYPTO_TEST_TEST_HELPERS_H_
+#define CONTENT_CHILD_WEBCRYPTO_TEST_TEST_HELPERS_H_
+
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/platform/WebCryptoAlgorithm.h"
+#include "third_party/WebKit/public/platform/WebCryptoKey.h"
+
+#define EXPECT_BYTES_EQ(expected, actual) \
+  EXPECT_EQ(CryptoData(expected), CryptoData(actual))
+
+#define EXPECT_BYTES_EQ_HEX(expected_hex, actual_bytes) \
+  EXPECT_BYTES_EQ(HexStringToBytes(expected_hex), actual_bytes)
+
+namespace base {
+class DictionaryValue;
+class ListValue;
+class Value;
+}
+
+namespace blink {
+class WebCryptoAlgorithm;
+}
+
+namespace content {
+
+namespace webcrypto {
+
+class Status;
+class CryptoData;
+
+// These functions are used by GTEST to support EXPECT_EQ() for
+// webcrypto::Status and webcrypto::CryptoData
+
+void PrintTo(const Status& status, ::std::ostream* os);
+bool operator==(const Status& a, const Status& b);
+bool operator!=(const Status& a, const Status& b);
+
+void PrintTo(const CryptoData& data, ::std::ostream* os);
+bool operator==(const CryptoData& a, const CryptoData& b);
+bool operator!=(const CryptoData& a, const CryptoData& b);
+
+// TODO(eroman): For Linux builds using system NSS, AES-GCM and RSA-OAEP, and
+// RSA key import are a runtime dependency.
+bool SupportsAesGcm();
+bool SupportsRsaOaep();
+bool SupportsRsaPrivateKeyImport();
+
+blink::WebCryptoAlgorithm CreateRsaHashedKeyGenAlgorithm(
+    blink::WebCryptoAlgorithmId algorithm_id,
+    const blink::WebCryptoAlgorithmId hash_id,
+    unsigned int modulus_length,
+    const std::vector<uint8_t>& public_exponent);
+
+// Returns a slightly modified version of the input vector.
+//
+//  - For non-empty inputs a single bit is inverted.
+//  - For empty inputs, a byte is added.
+std::vector<uint8_t> Corrupted(const std::vector<uint8_t>& input);
+
+std::vector<uint8_t> HexStringToBytes(const std::string& hex);
+
+std::vector<uint8_t> MakeJsonVector(const std::string& json_string);
+std::vector<uint8_t> MakeJsonVector(const base::DictionaryValue& dict);
+
+// ----------------------------------------------------------------
+// Helpers for working with JSON data files for test expectations.
+// ----------------------------------------------------------------
+
+// Reads a file in "src/content/test/data/webcrypto" to a base::Value.
+// The file must be JSON, however it can also include C++ style comments.
+::testing::AssertionResult ReadJsonTestFile(const char* test_file_name,
+                                            scoped_ptr<base::Value>* value);
+// Same as ReadJsonTestFile(), but returns the value as a List.
+::testing::AssertionResult ReadJsonTestFileToList(
+    const char* test_file_name,
+    scoped_ptr<base::ListValue>* list);
+
+// Reads a string property from the dictionary with path |property_name|
+// (which can include periods for nested dictionaries). Interprets the
+// string as a hex encoded string and converts it to a bytes list.
+//
+// Returns empty vector on failure.
+std::vector<uint8_t> GetBytesFromHexString(base::DictionaryValue* dict,
+                                           const char* property_name);
+
+// Reads a string property with path "property_name" and converts it to a
+// WebCryptoAlgorith. Returns null algorithm on failure.
+blink::WebCryptoAlgorithm GetDigestAlgorithm(base::DictionaryValue* dict,
+                                             const char* property_name);
+
+// Returns true if any of the vectors in the input list have identical content.
+// Dumb O(n^2) implementation but should be fast enough for the input sizes that
+// are used.
+bool CopiesExist(const std::vector<std::vector<uint8_t> >& bufs);
+
+blink::WebCryptoAlgorithm CreateAesKeyGenAlgorithm(
+    blink::WebCryptoAlgorithmId aes_alg_id,
+    unsigned short length);
+
+// The following key pair is comprised of the SPKI (public key) and PKCS#8
+// (private key) representations of the key pair provided in Example 1 of the
+// NIST test vectors at
+// ftp://ftp.rsa.com/pub/rsalabs/tmp/pkcs1v15sign-vectors.txt
+extern const unsigned int kModulusLengthBits;
+extern const char* const kPublicKeySpkiDerHex;
+extern const char* const kPrivateKeyPkcs8DerHex;
+
+// The modulus and exponent (in hex) of kPublicKeySpkiDerHex
+extern const char* const kPublicKeyModulusHex;
+extern const char* const kPublicKeyExponentHex;
+
+blink::WebCryptoKey ImportSecretKeyFromRaw(
+    const std::vector<uint8_t>& key_raw,
+    const blink::WebCryptoAlgorithm& algorithm,
+    blink::WebCryptoKeyUsageMask usage);
+
+void ImportRsaKeyPair(const std::vector<uint8_t>& spki_der,
+                      const std::vector<uint8_t>& pkcs8_der,
+                      const blink::WebCryptoAlgorithm& algorithm,
+                      bool extractable,
+                      blink::WebCryptoKeyUsageMask public_key_usage_mask,
+                      blink::WebCryptoKeyUsageMask private_key_usage_mask,
+                      blink::WebCryptoKey* public_key,
+                      blink::WebCryptoKey* private_key);
+
+Status ImportKeyJwkFromDict(const base::DictionaryValue& dict,
+                            const blink::WebCryptoAlgorithm& algorithm,
+                            bool extractable,
+                            blink::WebCryptoKeyUsageMask usage_mask,
+                            blink::WebCryptoKey* key);
+
+// Parses a vector of JSON into a dictionary.
+scoped_ptr<base::DictionaryValue> GetJwkDictionary(
+    const std::vector<uint8_t>& json);
+
+// Verifies the input dictionary contains the expected values. Exact matches are
+// required on the fields examined.
+::testing::AssertionResult VerifyJwk(
+    const scoped_ptr<base::DictionaryValue>& dict,
+    const std::string& kty_expected,
+    const std::string& alg_expected,
+    blink::WebCryptoKeyUsageMask use_mask_expected);
+
+::testing::AssertionResult VerifySecretJwk(
+    const std::vector<uint8_t>& json,
+    const std::string& alg_expected,
+    const std::string& k_expected_hex,
+    blink::WebCryptoKeyUsageMask use_mask_expected);
+
+// Verifies that the JSON in the input vector contains the provided
+// expected values. Exact matches are required on the fields examined.
+::testing::AssertionResult VerifyPublicJwk(
+    const std::vector<uint8_t>& json,
+    const std::string& alg_expected,
+    const std::string& n_expected_hex,
+    const std::string& e_expected_hex,
+    blink::WebCryptoKeyUsageMask use_mask_expected);
+
+// Helper that tests importing ane exporting of symmetric keys as JWK.
+void ImportExportJwkSymmetricKey(
+    int key_len_bits,
+    const blink::WebCryptoAlgorithm& import_algorithm,
+    blink::WebCryptoKeyUsageMask usages,
+    const std::string& jwk_alg);
+
+}  // namespace webcrypto
+
+}  // namesapce content
+
+#endif  // CONTENT_CHILD_WEBCRYPTO_TEST_TEST_HELPERS_H_