Move two generic string split functions from sync API to their own API in base/string_split.

base/string_split_unittest.cc

Index: base/string_split_unittest.cc
===================================================================
--- base/string_split_unittest.cc	(revision 0)
+++ base/string_split_unittest.cc	(revision 0)
@@ -0,0 +1,120 @@
+// Copyright (c) 2009 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.
+
+#include "base/string_split.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+class SplitStringIntoKeyValuesTest : public testing::Test {
+ protected:
+  std::string key;
+  std::vector<std::string> values;
+};
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyInputMultipleValues) {
+  EXPECT_FALSE(SplitStringIntoKeyValues("",     // Empty input
+                                        '\t',   // Key separators
+                                        &key, &values));
+  EXPECT_TRUE(key.empty());
+  EXPECT_TRUE(values.empty());
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyValueInputMultipleValues) {
+  EXPECT_FALSE(SplitStringIntoKeyValues("key_with_no_value\t",
+                                        '\t',  // Key separators
+                                        &key, &values));
+  EXPECT_EQ("key_with_no_value", key);
+  EXPECT_TRUE(values.empty());
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyKeyInputMultipleValues) {
+  EXPECT_TRUE(SplitStringIntoKeyValues("\tvalue for empty key",
+                                       '\t',  // Key separators
+                                       &key, &values));
+  EXPECT_TRUE(key.empty());
+  ASSERT_EQ(1, values.size());
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, KeyWithMultipleValues) {
+  EXPECT_TRUE(SplitStringIntoKeyValues("key1\tvalue1,   value2   value3",
+                                       '\t',  // Key separators
+                                       &key, &values));
+  EXPECT_EQ("key1", key);
+  ASSERT_EQ(1, values.size());
+  EXPECT_EQ("value1,   value2   value3", values[0]);
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyInputSingleValue) {
+  EXPECT_FALSE(SplitStringIntoKeyValues("",     // Empty input
+                                        '\t',   // Key separators
+                                        &key, &values));
+  EXPECT_TRUE(key.empty());
+  EXPECT_TRUE(values.empty());
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyValueInputSingleValue) {
+  EXPECT_FALSE(SplitStringIntoKeyValues("key_with_no_value\t",
+                                        '\t',  // Key separators
+                                        &key, &values));
+  EXPECT_EQ("key_with_no_value", key);
+  EXPECT_TRUE(values.empty());
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, EmptyKeyInputSingleValue) {
+  EXPECT_TRUE(SplitStringIntoKeyValues("\tvalue for empty key",
+                                       '\t',  // Key separators
+                                       &key, &values));
+  EXPECT_TRUE(key.empty());
+  ASSERT_EQ(1, values.size());
+  EXPECT_EQ("value for empty key", values[0]);
+}
+
+TEST_F(SplitStringIntoKeyValuesTest, KeyWithSingleValue) {
+  EXPECT_TRUE(SplitStringIntoKeyValues("key1\tvalue1,   value2   value3",
+                                       '\t',  // Key separators
+                                       &key, &values));
+  EXPECT_EQ("key1", key);
+  ASSERT_EQ(1, values.size());
+  EXPECT_EQ("value1,   value2   value3", values[0]);
+}
+
+class SplitStringIntoKeyValuePairsTest : public testing::Test {
+ protected:
+  std::vector<std::pair<std::string, std::string> > kv_pairs;
+};
+
+TEST_F(SplitStringIntoKeyValuePairsTest, DISABLED_EmptyString) {
+  EXPECT_TRUE(SplitStringIntoKeyValuePairs("",
+                                           ':',   // Key-value delimiters
+                                           ',',   // Key-value pair delims
+                                           &kv_pairs));
+  EXPECT_TRUE(kv_pairs.empty());
+}
+
+TEST_F(SplitStringIntoKeyValuePairsTest, EmptySecondValue) {
+  EXPECT_FALSE(SplitStringIntoKeyValuePairs("key1:value1 , key2:",
+                                            ':',   // Key-value delimiters
+                                            ',',   // Key-value pair delims
+                                            &kv_pairs));
+  ASSERT_EQ(2, kv_pairs.size());
+  EXPECT_EQ("key1", kv_pairs[0].first);
+  EXPECT_EQ("value1", kv_pairs[0].second);
+  EXPECT_EQ("key2", kv_pairs[1].first);
+  EXPECT_EQ("", kv_pairs[1].second);
+}
+
+TEST_F(SplitStringIntoKeyValuePairsTest, DelimiterInValue) {
+  EXPECT_TRUE(SplitStringIntoKeyValuePairs("key1:va:ue1 , key2:value2",
+                                           ':',   // Key-value delimiters
+                                           ',',   // Key-value pair delims
+                                           &kv_pairs));
+  ASSERT_EQ(2, kv_pairs.size());
+  EXPECT_EQ("key1", kv_pairs[0].first);
+  EXPECT_EQ("va:ue1", kv_pairs[0].second);
+  EXPECT_EQ("key2", kv_pairs[1].first);
+  EXPECT_EQ("value2", kv_pairs[1].second);
+}
+
+}  // namespace base