AU: Common code to parse simple key/value store files
We use a few files, like /etc/lsb-release, that have a simple
key/value store format: each line is a key/value pair and the
key/value are separated by '='. This change make some common code to
parse (and assemble) these files, which is used in one place now but
will be used in another place soon, too.
BUG=None
TEST=attached unittests
Review URL: http://codereview.chromium.org/2105016
diff --git a/simple_key_value_store_unittest.cc b/simple_key_value_store_unittest.cc
new file mode 100644
index 0000000..b8ca384
--- /dev/null
+++ b/simple_key_value_store_unittest.cc
@@ -0,0 +1,45 @@
+// Copyright (c) 2010 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 <map>
+#include <string>
+#include <gtest/gtest.h>
+#include "base/string_util.h"
+#include "update_engine/simple_key_value_store.h"
+
+using std::map;
+using std::string;
+
+namespace chromeos_update_engine {
+
+class SimpleKeyValueStoreTest : public ::testing::Test {};
+
+TEST(SimpleKeyValueStoreTest, SimpleTest) {
+ string blob = "A=B\nC=\n=\nFOO=BAR=BAZ\nBAR=BAX\nMISSING=NEWLINE";
+ map<string, string> parts = simple_key_value_store::ParseString(blob);
+ string combined = simple_key_value_store::AssembleString(parts);
+ map<string, string> combined_parts =
+ simple_key_value_store::ParseString(combined);
+ map<string, string>* maps[] = { &parts, &combined_parts };
+ for (size_t i = 0; i < arraysize(maps); i++) {
+ map<string, string>* test_map = maps[i];
+ EXPECT_EQ(6, test_map->size()) << "i = " << i;
+ EXPECT_EQ("B", (*test_map)["A"]) << "i = " << i;
+ EXPECT_EQ("", (*test_map)["C"]) << "i = " << i;
+ EXPECT_EQ("", (*test_map)[""]) << "i = " << i;
+ EXPECT_EQ("BAR=BAZ", (*test_map)["FOO"]) << "i = " << i;
+ EXPECT_EQ("BAX", (*test_map)["BAR"]) << "i = " << i;
+ EXPECT_EQ("NEWLINE", (*test_map)["MISSING"]) << "i = " << i;
+ }
+}
+
+TEST(SimpleKeyValueStoreTest, EmptyTest) {
+ map<string, string> empty_map = simple_key_value_store::ParseString("");
+ EXPECT_TRUE(empty_map.empty());
+ string str = simple_key_value_store::AssembleString(empty_map);
+ if (!str.empty())
+ EXPECT_EQ("\n", str); // Optionally may end in newline
+}
+
+} // namespace chromeos_update_engine