AU: Bzip2 utility functions that mirror Gzip utility functions.

src/platform/update_engine/zip_unittest.cc

+// Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <string.h>
+#include <unistd.h>
+#include <string>
+#include <vector>
+#include <gtest/gtest.h>
+#include "update_engine/bzip.h"
+#include "update_engine/gzip.h"
+#include "update_engine/test_utils.h"
+#include "update_engine/utils.h"
+
+using std::string;
+using std::vector;
+
+namespace chromeos_update_engine {
+
+template <typename T>
+class ZipTest : public ::testing::Test {
+ public:
+  bool ZipDecompress(const std::vector<char>& in,
+                     std::vector<char>* out) const = 0;
+  bool ZipCompress(const std::vector<char>& in,
+                   std::vector<char>* out) const = 0;
+  bool ZipCompressString(const std::string& str,
+                         std::vector<char>* out) const = 0;
+  bool ZipDecompressString(const std::string& str,
+                           std::vector<char>* out) const = 0;
+};
+
+class GzipTest {};
+
+template <>
+class ZipTest<GzipTest> : public ::testing::Test {
+ public:
+  bool ZipDecompress(const std::vector<char>& in,
+                     std::vector<char>* out) const {
+    return GzipDecompress(in, out);
+  }
+  bool ZipCompress(const std::vector<char>& in,
+                   std::vector<char>* out) const {
+    return GzipCompress(in, out);
+  }
+  bool ZipCompressString(const std::string& str,
+                         std::vector<char>* out) const {
+    return GzipCompressString(str, out);
+  }
+  bool ZipDecompressString(const std::string& str,
+                           std::vector<char>* out) const {
+    return GzipDecompressString(str, out);
+  }
+};
+
+class BzipTest {};
+
+template <>
+class ZipTest<BzipTest> : public ::testing::Test {
+ public:
+  bool ZipDecompress(const std::vector<char>& in,
+                     std::vector<char>* out) const {
+    return BzipDecompress(in, out);
+  }
+  bool ZipCompress(const std::vector<char>& in,
+                   std::vector<char>* out) const {
+    return BzipCompress(in, out);
+  }
+  bool ZipCompressString(const std::string& str,
+                         std::vector<char>* out) const {
+    return BzipCompressString(str, out);
+  }
+  bool ZipDecompressString(const std::string& str,
+                           std::vector<char>* out) const {
+    return BzipDecompressString(str, out);
+  }
+};
+
+typedef ::testing::Types<GzipTest, BzipTest>
+    ZipTestTypes;
+TYPED_TEST_CASE(ZipTest, ZipTestTypes);
+
+
+
+TYPED_TEST(ZipTest, SimpleTest) {
+  string in("this should compress well xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+            "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+            "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+            "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+            "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+            "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
+  vector<char> out;
+  EXPECT_TRUE(this->ZipCompressString(in, &out));
+  EXPECT_LT(out.size(), in.size());
+  EXPECT_GT(out.size(), 0);
+  vector<char> decompressed;
+  EXPECT_TRUE(this->ZipDecompress(out, &decompressed));
+  EXPECT_EQ(in.size(), decompressed.size());
+  EXPECT_TRUE(!memcmp(in.data(), &decompressed[0], in.size()));
+}
+
+TYPED_TEST(ZipTest, PoorCompressionTest) {
+  string in(reinterpret_cast<const char*>(kRandomString),
+            sizeof(kRandomString));
+  vector<char> out;
+  EXPECT_TRUE(this->ZipCompressString(in, &out));
+  EXPECT_GT(out.size(), in.size());
+  string out_string(&out[0], out.size());
+  vector<char> decompressed;
+  EXPECT_TRUE(this->ZipDecompressString(out_string, &decompressed));
+  EXPECT_EQ(in.size(), decompressed.size());
+  EXPECT_TRUE(!memcmp(in.data(), &decompressed[0], in.size()));
+}
+
+TYPED_TEST(ZipTest, MalformedZipTest) {
+  string in(reinterpret_cast<const char*>(kRandomString),
+            sizeof(kRandomString));
+  vector<char> out;
+  EXPECT_FALSE(this->ZipDecompressString(in, &out));
+}
+
+TYPED_TEST(ZipTest, EmptyInputsTest) {
+  string in;
+  vector<char> out;
+  EXPECT_TRUE(this->ZipDecompressString(in, &out));
+  EXPECT_EQ(0, out.size());
+
+  EXPECT_TRUE(this->ZipCompressString(in, &out));
+  EXPECT_EQ(0, out.size());
+}
+
+}  // namespace chromeos_update_engine