[cpp] JSON utility

This patch is part of a series of patches that enable showing an address
input form. This patch adds a rapidjson dependency and a wrapper.

git-svn-id: http://libaddressinput.googlecode.com/svn/trunk@155 38ededc0-08b8-5190-f2ac-b31f878777ad

1 files changed, 112 insertions, 0 deletions

diff --git a/cpp/test/util/json_test.cc b/cpp/test/util/json_test.cc
new file mode 100644
index 0000000..b701ef1
--- /dev/null
+++ b/cpp/test/util/json_test.cc
@@ -0,0 +1,112 @@
+// Copyright (C) 2013 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "util/json.h"
+
+#include <string>
+
+#include <gtest/gtest.h>
+
+namespace {
+
+using i18n::addressinput::Json;
+
+TEST(JsonTest, EmptyStringIsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject(std::string()));
+}
+
+TEST(JsonTest, EmptyDictionaryContainsNoKeys) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{}"));
+  EXPECT_FALSE(json.HasStringValueForKey("key"));
+  EXPECT_FALSE(json.HasStringValueForKey(std::string()));
+}
+
+TEST(JsonTest, InvalidJsonIsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject("{"));
+}
+
+TEST(JsonTest, OneKeyIsValid) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"key\": \"value\"}"));
+  ASSERT_TRUE(json.HasStringValueForKey("key"));
+  EXPECT_EQ("value", json.GetStringValueForKey("key"));
+}
+
+TEST(JsonTest, EmptyStringKeyIsNotInObject) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"key\": \"value\"}"));
+  EXPECT_FALSE(json.HasStringValueForKey(std::string()));
+}
+
+TEST(JsonTest, EmptyKeyIsValid) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"\": \"value\"}"));
+  ASSERT_TRUE(json.HasStringValueForKey(std::string()));
+  EXPECT_EQ("value", json.GetStringValueForKey(std::string()));
+}
+
+TEST(JsonTest, EmptyValueIsValid) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"key\": \"\"}"));
+  ASSERT_TRUE(json.HasStringValueForKey("key"));
+  EXPECT_TRUE(json.GetStringValueForKey("key").empty());
+}
+
+TEST(JsonTest, Utf8EncodingIsValid) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"key\": \"Ü\"}"));
+  ASSERT_TRUE(json.HasStringValueForKey("key"));
+  EXPECT_EQ("Ü", json.GetStringValueForKey("key"));
+}
+
+TEST(JsonTest, InvalidUtf8IsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject("{\"key\": \"\xC3\x28\"}"));
+}
+
+TEST(JsonTest, NullInMiddleIsNotValid) {
+  Json json;
+  static const char kJson[] = "{\"key\": \"val\0ue\"}";
+  EXPECT_FALSE(json.ParseObject(std::string(kJson, sizeof kJson - 1)));
+}
+
+TEST(JsonTest, TwoKeysAreValid) {
+  Json json;
+  ASSERT_TRUE(json.ParseObject("{\"key1\": \"value1\", \"key2\": \"value2\"}"));
+  ASSERT_TRUE(json.HasStringValueForKey("key1"));
+  EXPECT_EQ("value1", json.GetStringValueForKey("key1"));
+
+  ASSERT_TRUE(json.HasStringValueForKey("key2"));
+  EXPECT_EQ("value2", json.GetStringValueForKey("key2"));
+}
+
+TEST(JsonTest, ListIsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject("[]"));
+}
+
+TEST(JsonTest, StringIsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject("\"value\""));
+}
+
+TEST(JsonTest, NumberIsNotValid) {
+  Json json;
+  EXPECT_FALSE(json.ParseObject("3"));
+}
+
+}  // namespace