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Richard SmithandJon Ross-Perkins
66caff2c26
Instead of crashing when run outside of `bazel`, make the toolchain's `file_test` binary work properly when no test-specific environment variables are set. This makes it a lot easier to run `file_test` under a debugger. There are two main changes here: - Don't crash if `$TEST_TMPDIR` is unset. Instead, fall back to LLVM's temporary directory (typically `$TMPDIR`). We already did this in some places in tests. We now do it in more places. - Don't fall back to a target label of `<target>` in the reproduction commands if `$TEST_TARGET` is unset, because this causes all the tests to fail because their output doesn't match the expected output due to a differing bazel run command. Instead explicitly specify the target from the `FileTestBase`-derived class. Infrastructure for this has been added generally, but only rolled out to the toolchain `file_test` binary for now. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include "testing/base/file_helpers.h"
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#include <gtest/gtest.h>
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#include <cstdlib>
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#include <fstream>
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#include <sstream>
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#include <string>
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#include <system_error>
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namespace Carbon::Testing {
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auto GetTempDirectory() -> std::filesystem::path {
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if (char* tmpdir_env = getenv("TEST_TMPDIR"); tmpdir_env != nullptr) {
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return tmpdir_env;
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} else {
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return std::filesystem::temp_directory_path();
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}
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}
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auto ReadFile(std::filesystem::path path) -> ErrorOr<std::string> {
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std::ifstream file_stream(path);
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if (file_stream.fail()) {
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return Error(llvm::formatv("Error opening file: {0}", path));
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}
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std::stringstream buffer;
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buffer << file_stream.rdbuf();
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if (file_stream.fail()) {
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return Error(llvm::formatv("Error reading file: {0}", path));
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}
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return buffer.str();
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}
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auto WriteTestFile(llvm::StringRef name, llvm::StringRef contents)
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-> ErrorOr<std::filesystem::path> {
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std::filesystem::path test_tmpdir = GetTempDirectory();
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const auto* unit_test = ::testing::UnitTest::GetInstance();
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const auto* test_info = unit_test->current_test_info();
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std::filesystem::path test_file =
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test_tmpdir / llvm::formatv("{0}_{1}_{2}", test_info->test_suite_name(),
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test_info->name(), name)
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.str();
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// Make debugging a bit easier by cleaning up any files from previous runs.
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// This is only necessary when not run in Bazel's test environment.
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std::filesystem::remove(test_file);
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if (std::filesystem::exists(test_file)) {
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return Error(
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llvm::formatv("Unable to remove an existing file: {0}", test_file));
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}
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std::error_code ec;
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llvm::raw_fd_ostream test_file_stream(test_file.string(), ec);
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if (ec) {
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return Error(llvm::formatv("Test file error: {0}", ec.message()));
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}
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test_file_stream << contents;
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return test_file;
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}
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} // namespace Carbon::Testing
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