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// Copyright 2015 Google Inc. All Rights Reserved.
// 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include "cobalt/layout_tests/test_parser.h"
#include "base/file_path.h"
#include "base/file_util.h"
#include "base/optional.h"
#include "base/path_service.h"
#include "base/string_number_conversions.h"
#include "base/string_util.h"
#include "cobalt/base/cobalt_paths.h"
namespace cobalt {
namespace layout_tests {
std::ostream& operator<<(std::ostream& out, const TestInfo& test_info) {
return out << test_info.base_file_path.value();
namespace {
// Returns the relative path to Cobalt layout tests. This can be appended
// to either base::DIR_SOURCE_ROOT to get the input directory or
// base::DIR_COBALT_TEST_OUT to get the output directory.
FilePath GetDirSourceRootRelativePath() {
return FilePath(FILE_PATH_LITERAL("cobalt"))
GURL GetURLFromBaseFilePath(const FilePath& base_file_path) {
return GURL("file:///" + GetDirSourceRootRelativePath().value() + "/" +
} // namespace
namespace {
base::optional<TestInfo> ParseLayoutTestCaseLine(
const FilePath& top_level, const std::string& line_string) {
// Split the line up by commas, of which there may be none.
std::vector<std::string> test_case_tokens;
Tokenize(line_string, ",", &test_case_tokens);
if (test_case_tokens.empty() || test_case_tokens.size() > 2) {
return base::nullopt;
// Extract the test case file path as the first element before a comma, if
// there is one. The test case file path can optionally be postfixed by a
// colon and a viewport resolution.
std::vector<std::string> file_path_tokens;
Tokenize(test_case_tokens[0], ":", &file_path_tokens);
base::optional<math::Size> viewport_size;
if (file_path_tokens.size() > 1) {
DCHECK_EQ(2, file_path_tokens.size());
// If there is a colon, the string that comes after the colon contains the
// explicitly specified resolution in pixels, formatted as 'width x height'.
std::vector<std::string> resolution_tokens;
Tokenize(file_path_tokens[1], "x", &resolution_tokens);
if (resolution_tokens.size() == 2) {
int width, height;
base::StringToInt(resolution_tokens[0], &width);
base::StringToInt(resolution_tokens[1], &height);
viewport_size.emplace(width, height);
std::string base_file_path_string;
TrimWhitespaceASCII(file_path_tokens[0], TRIM_ALL, &base_file_path_string);
if (base_file_path_string.empty()) {
return base::nullopt;
FilePath base_file_path(top_level.Append(base_file_path_string));
if (test_case_tokens.size() == 1) {
// If there is no comma, determine the URL from the file path.
return TestInfo(base_file_path, GetURLFromBaseFilePath(base_file_path),
} else {
// If there is a comma, the string that comes after it contains the
// explicitly specified URL. Extract that and use it as the test URL.
DCHECK_EQ(2, test_case_tokens.size());
std::string url_string;
TrimWhitespaceASCII(test_case_tokens[1], TRIM_ALL, &url_string);
if (url_string.empty()) {
return base::nullopt;
return TestInfo(base_file_path, GURL(url_string), viewport_size);
} // namespace
std::vector<TestInfo> EnumerateLayoutTests(const std::string& top_level) {
FilePath test_dir(GetTestInputRootDirectory().Append(top_level));
FilePath layout_tests_list_file(
std::string layout_test_list_string;
if (!file_util::ReadFileToString(layout_tests_list_file,
&layout_test_list_string)) {
DLOG(ERROR) << "Could not open '" << layout_tests_list_file.value() << "'.";
return std::vector<TestInfo>();
} else {
// Tokenize the file contents into lines, and then read each line one by
// one as the name of the test file.
std::vector<std::string> line_tokens;
Tokenize(layout_test_list_string, "\n\r", &line_tokens);
std::vector<TestInfo> test_info_list;
for (std::vector<std::string>::const_iterator iter = line_tokens.begin();
iter != line_tokens.end(); ++iter) {
base::optional<TestInfo> parsed_test_info =
ParseLayoutTestCaseLine(FilePath(top_level), *iter);
if (!parsed_test_info) {
DLOG(WARNING) << "Ignoring invalid test case line: " << iter->c_str();
} else {
return test_info_list;
} // namespace layout_tests
} // namespace cobalt