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Replace checkpoint file atomically ECFLOW-1925
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| /* | ||
| * Copyright 2023- ECMWF. | ||
| * | ||
| * This software is licensed under the terms of the Apache Licence version 2.0 | ||
| * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. | ||
| * In applying this licence, ECMWF does not waive the privileges and immunities | ||
| * granted to it by virtue of its status as an intergovernmental organisation | ||
| * nor does it submit to any jurisdiction. | ||
| */ | ||
|
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| #include <fstream> | ||
| #include <iostream> | ||
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| #include <boost/test/unit_test.hpp> | ||
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| #include "CheckPtSaver.hpp" | ||
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| // TODO: Move the following trace_*_function to a common test module/library | ||
| static void trace_test() { | ||
| std::cout << "..." << boost::unit_test::framework::current_test_case().full_name() << "\n"; | ||
| } | ||
|
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| /** | ||
| * A self cleaning test file, useful to automate test data storage/cleanup, with automatic generation of file names. | ||
| */ | ||
| class TestFile { | ||
| public: | ||
| /** | ||
| * Create a handle for a 'non-existent' data file | ||
| */ | ||
| explicit TestFile(const std::string& basename) : absolute_path_(TestFile::unique_absolute_path(basename)) {} | ||
|
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| /** | ||
| * Create a handle for a data file, with the given content | ||
| */ | ||
| TestFile(const std::string& basename, const std::string& content) | ||
| : absolute_path_(TestFile::unique_absolute_path(basename)) { | ||
| f_store(absolute_path_.string(), content); | ||
| } | ||
| ~TestFile() { fs::remove(absolute_path_); } | ||
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| [[nodiscard]] const fs::path& path() const { return absolute_path_; } | ||
| [[nodiscard]] std::string load() const { return f_load(absolute_path_); } | ||
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| static fs::path unique_absolute_path(const std::string& basename) { | ||
| return fs::absolute(fs::unique_path(basename)); | ||
| } | ||
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| private: | ||
| static void f_store(const fs::path& outfile, const std::string& data) { | ||
| std::ofstream ofs(outfile.string()); | ||
| ofs << data; | ||
| } | ||
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| static std::string f_load(const fs::path& infile) { | ||
| std::ifstream ifs(infile.string()); | ||
| std::string buffer((std::istreambuf_iterator<char>(ifs)), std::istreambuf_iterator<char>()); | ||
| return buffer; | ||
| } | ||
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| private: | ||
| fs::path absolute_path_; | ||
| }; | ||
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| void handle_store(const fs::path& temporary) { | ||
| std::ofstream ofs(temporary.string()); | ||
| ofs << "2"; | ||
| }; | ||
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| BOOST_AUTO_TEST_SUITE(TestServer) | ||
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| BOOST_AUTO_TEST_CASE(test_checkpt_store_successful_case0) { | ||
| trace_test(); | ||
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| // Case 0: neither current and backup exist | ||
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| TestFile current("current_%%%%-%%%%-%%%%"); // Important: no actual file is created | ||
| TestFile backup("backup_%%%%-%%%%-%%%%"); // Important: no actual file is created | ||
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| CheckPtSaver::storeWithBackup(current.path(), backup.path(), handle_store); | ||
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| BOOST_CHECK_EQUAL(current.load(), "2"); | ||
| BOOST_CHECK(!fs::exists(backup.path())); | ||
| } | ||
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| BOOST_AUTO_TEST_CASE(test_checkpt_store_successful_case1) { | ||
| trace_test(); | ||
|
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| // Case 1: current and backup both exist and are non-empty | ||
|
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| TestFile current("current_%%%%-%%%%-%%%%", "1"); | ||
| TestFile backup("backup_%%%%-%%%%-%%%%", "X"); | ||
|
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| CheckPtSaver::storeWithBackup(current.path(), backup.path(), handle_store); | ||
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| BOOST_CHECK_EQUAL(current.load(), "2"); | ||
| BOOST_CHECK_EQUAL(backup.load(), "1"); | ||
| } | ||
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| BOOST_AUTO_TEST_CASE(test_checkpt_store_successful_case2) { | ||
| trace_test(); | ||
|
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| // Case 2: current and backup both exist, and current is empty | ||
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| TestFile current("current_%%%%-%%%%-%%%%", ""); // Important: file is created empty | ||
| TestFile backup("backup_%%%%-%%%%-%%%%", "X"); | ||
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| CheckPtSaver::storeWithBackup(current.path(), backup.path(), handle_store); | ||
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| BOOST_CHECK_EQUAL(current.load(), "2"); | ||
| BOOST_CHECK_EQUAL(backup.load(), "X"); | ||
| } | ||
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| BOOST_AUTO_TEST_CASE(test_checkpt_store_successful_case3) { | ||
| trace_test(); | ||
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| // Case 3: current exists, but no backup is available | ||
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| TestFile current("current_%%%%-%%%%-%%%%", "1"); | ||
| TestFile backup("backup_%%%%-%%%%-%%%%"); // Important: no actual file is created | ||
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| CheckPtSaver::storeWithBackup(current.path(), backup.path(), handle_store); | ||
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| BOOST_CHECK_EQUAL(current.load(), "2"); | ||
| BOOST_CHECK_EQUAL(backup.load(), "1"); | ||
| } | ||
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| BOOST_AUTO_TEST_SUITE_END() |