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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/extension_function_histogram_value.h"
#include <map>
#include <set>
#include <string>
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/path_service.h"
#include "base/strings/stringprintf.h"
#include "base/test/metrics/histogram_enum_reader.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace extensions {
TEST(ExtensionFunctionHistogramValueTest, CheckEnums) {
std::optional<base::HistogramEnumEntryMap> enums = base::ReadEnumFromEnumsXml(
"ExtensionFunctions", /*subdirectory=*/"extensions");
ASSERT_TRUE(enums);
// The number of enums in the histogram entry should be equal to the number of
// enums in the C++ file.
EXPECT_EQ(enums->size(), functions::ENUM_BOUNDARY);
base::FilePath src_root;
ASSERT_TRUE(base::PathService::Get(base::DIR_SRC_TEST_DATA_ROOT, &src_root));
base::FilePath function_histogram_value =
src_root.AppendASCII("extensions")
.AppendASCII("browser")
.AppendASCII("extension_function_histogram_value.h");
ASSERT_TRUE(base::PathExists(function_histogram_value));
std::string file_contents;
ASSERT_TRUE(base::ReadFileToString(function_histogram_value, &file_contents));
for (const auto& entry : *enums) {
// Check that the C++ file has a definition equal to the histogram file.
// For now, we do this in a simple, but reasonably effective, manner:
// expecting to find the string " ENTRY = <value>" somewhere in the file.
// Notes:
// - We prepend a space here (" ENTRY =" instead of "ENTRY =") so that
// it also enforces updating the entry if you rename it to
// `DELETED_FOO_METHOD`.
// - This doesn't work with multi-line declarations in the enum file. It's
// not (yet) worth making it smart enough to deal with that.
std::string expected_string =
base::StringPrintf(" %s = %d", entry.second.c_str(), entry.first);
EXPECT_TRUE(file_contents.contains(expected_string))
<< "Failed to find entry " << entry.second << " with value "
<< entry.first;
}
}
} // namespace extensions
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