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// Copyright 2015 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 "chromeos-dbus-bindings/test_utils.h"
#include <string>
#include <vector>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <base/logging.h>
#include <chromeos/process.h>
#include <gtest/gtest.h>
using std::string;
using std::vector;
namespace {
// Return the diff between the texts |a| and |b|.
string GetUnifiedDiff(const string& a, const string& b) {
base::FilePath path_a, path_b;
if (!base::CreateTemporaryFile(&path_a) ||
!base::CreateTemporaryFile(&path_b)) {
return "Error creating temporary file";
}
WriteFile(path_a, a.data(), a.size());
WriteFile(path_b, b.data(), b.size());
chromeos::ProcessImpl proc;
proc.AddArg("diff");
proc.AddArg("-u");
proc.AddArg(path_a.value());
proc.AddArg(path_b.value());
proc.SetSearchPath(true);
proc.RedirectUsingPipe(STDOUT_FILENO, false);
proc.Start();
int fd = proc.GetPipe(STDOUT_FILENO);
vector<char> buffer(32 * 1024);
string output;
while (true) {
int rc = read(fd, buffer.data(), buffer.size());
if (rc < 0) {
PLOG(ERROR) << "Reading from diff.";
break;
} else if (rc == 0) {
break;
} else {
output.append(buffer.data(), rc);
}
}
proc.Wait();
base::DeleteFile(path_a, false);
base::DeleteFile(path_b, false);
return output;
}
} // namespace
namespace chromeos_dbus_bindings {
namespace test_utils {
void ExpectTextContained(const tracked_objects::Location& from_here,
const string& expected_str,
const string& expected_expr,
const string& actual_str,
const string& actual_expr) {
if (string::npos != actual_str.find(expected_str))
return;
ADD_FAILURE_AT(from_here.file_name(), from_here.line_number())
<< "Expected to find " << expected_expr << " within " << actual_expr
<< ".\nHere is the diff:\n"
<< GetUnifiedDiff(expected_str, actual_str);
}
} // namespace test_utils
} // namespace chromeos_dbus_bindings
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