Add a class to parse answer json.

components/omnibox/suggestion_answer_unittest.cc

+// 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.
+
+#include "components/omnibox/suggestion_answer.h"
+
+#include "base/strings/string16.h"
+#include "base/strings/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+TEST(SuggestionAnswerTest, CopiesAreEqual) {
+  SuggestionAnswer answer1;
+  SuggestionAnswer answer2(answer1);
+  EXPECT_EQ(answer1, answer2);
+}
+
+TEST(SuggestionAnswerTest, EmptyAnswerIsInvalid) {
+  SuggestionAnswer answer;
+  EXPECT_FALSE(answer.is_valid());
+}
+
+TEST(SuggestionAnswerTest, EmptyJsonIsInvalid) {
+  std::string json = "";
+  SuggestionAnswer answer;
+  EXPECT_FALSE(SuggestionAnswer::ParseAnswer(json, &answer));
+  EXPECT_FALSE(answer.is_valid());
+}
+
+TEST(SuggestionAnswerTest, MalformedJsonIsInvalid) {
+  std::string json = "} malformed json {";
+  SuggestionAnswer answer;
+  EXPECT_FALSE(SuggestionAnswer::ParseAnswer(json, &answer));
+  EXPECT_FALSE(answer.is_valid());
+}
+
+TEST(SuggestionAnswerTest, ExactlyTwoLinesRequired) {
+  std::string json =
+      "{ 'l': ["
+      "  { 'il': { 't': [{ 't': 'text', 'tt': 8 }] } }, "
+      "] }";
+  SuggestionAnswer answer;
+  EXPECT_FALSE(SuggestionAnswer::ParseAnswer(json, &answer));
+  EXPECT_FALSE(answer.is_valid());
+
+  json =
+      "{ 'l': ["
+      "  { 'il': { 't': [{ 't': 'text', 'tt': 8 }] } }, "
+      "  { 'il': { 't': [{ 't': 'other text', 'tt': 5 }] } }"
+      "] }";
+  EXPECT_FALSE(SuggestionAnswer::ParseAnswer(json, &answer));
+  EXPECT_FALSE(answer.is_valid());
+
+  json =
+      "{ 'l': ["
+      "  { 'il': { 't': [{ 't': 'text', 'tt': 8 }] } }, "
+      "  { 'il': { 't': [{ 't': 'other text', 'tt': 5 }] } }"
+      "  { 'il': { 't': [{ 't': 'yet more text', 'tt': 13 }] } }"
+      "] }";
+  EXPECT_FALSE(SuggestionAnswer::ParseAnswer(json, &answer));
+  EXPECT_FALSE(answer.is_valid());
+}