354 lines
11 KiB
Rust
354 lines
11 KiB
Rust
// Support code for rustc's built in test runner generator. Currently,
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// none of this is meant for users. It is intended to support the
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// simplest interface possible for representing and running tests
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// while providing a base that other test frameworks may build off of.
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import task::task;
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export test_name;
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export test_fn;
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export default_test_fn;
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export test_desc;
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export test_main;
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export test_result;
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export test_opts;
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export tr_ok;
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export tr_failed;
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export tr_ignored;
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export run_tests_console;
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export run_tests_console_;
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export run_test;
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export filter_tests;
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export parse_opts;
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export test_to_task;
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export default_test_to_task;
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export configure_test_task;
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export joinable;
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native "cdecl" mod rustrt {
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fn sched_threads() -> uint;
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}
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// The name of a test. By convention this follows the rules for rust
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// paths; i.e. it should be a series of identifiers seperated by double
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// colons. This way if some test runner wants to arrange the tests
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// hierarchically it may.
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type test_name = str;
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// A function that runs a test. If the function returns successfully,
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// the test succeeds; if the function fails then the test fails. We
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// may need to come up with a more clever definition of test in order
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// to support isolation of tests into tasks.
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type test_fn<T> = T;
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type default_test_fn = test_fn<fn()>;
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// The definition of a single test. A test runner will run a list of
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// these.
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type test_desc<T> = {
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name: test_name,
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fn: test_fn<T>,
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ignore: bool,
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should_fail: bool
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};
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// The default console test runner. It accepts the command line
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// arguments and a vector of test_descs (generated at compile time).
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fn test_main(args: [str], tests: [test_desc<default_test_fn>]) {
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check (vec::is_not_empty(args));
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let opts =
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alt parse_opts(args) {
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either::left(o) { o }
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either::right(m) { fail m }
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};
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if !run_tests_console(opts, tests) { fail "Some tests failed"; }
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}
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type test_opts = {filter: option::t<str>, run_ignored: bool};
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type opt_res = either::t<test_opts, str>;
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// Parses command line arguments into test options
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fn parse_opts(args: [str]) : vec::is_not_empty(args) -> opt_res {
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let args_ = vec::tail(args);
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let opts = [getopts::optflag("ignored")];
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let match =
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alt getopts::getopts(args_, opts) {
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getopts::success(m) { m }
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getopts::failure(f) { ret either::right(getopts::fail_str(f)) }
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};
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let filter =
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if vec::len(match.free) > 0u {
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option::some(match.free[0])
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} else { option::none };
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let run_ignored = getopts::opt_present(match, "ignored");
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let test_opts = {filter: filter, run_ignored: run_ignored};
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ret either::left(test_opts);
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}
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tag test_result { tr_ok; tr_failed; tr_ignored; }
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type joinable = (task, comm::port<task::task_notification>);
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// To get isolation and concurrency tests have to be run in their own tasks.
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// In cases where test functions are closures it is not ok to just dump them
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// into a task and run them, so this transformation gives the caller a chance
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// to create the test task.
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type test_to_task<T> = fn@(test_fn<T>) -> joinable;
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// A simple console test runner
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fn run_tests_console(opts: test_opts,
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tests: [test_desc<default_test_fn>]) -> bool {
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run_tests_console_(opts, tests, default_test_to_task)
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}
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fn run_tests_console_<T>(opts: test_opts, tests: [test_desc<T>],
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to_task: test_to_task<T>) -> bool {
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type test_state =
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@{out: io::writer,
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use_color: bool,
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mutable total: uint,
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mutable passed: uint,
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mutable failed: uint,
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mutable ignored: uint,
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mutable failures: [test_desc<T>]};
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fn callback<T>(event: testevent<T>, st: test_state) {
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alt event {
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te_filtered(filtered_tests) {
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st.total = vec::len(filtered_tests);
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st.out.write_line(#fmt["\nrunning %u tests", st.total]);
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}
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te_wait(test) { st.out.write_str(#fmt["test %s ... ", test.name]); }
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te_result(test, result) {
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alt result {
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tr_ok. {
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st.passed += 1u;
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write_ok(st.out, st.use_color);
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st.out.write_line("");
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}
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tr_failed. {
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st.failed += 1u;
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write_failed(st.out, st.use_color);
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st.out.write_line("");
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st.failures += [test];
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}
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tr_ignored. {
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st.ignored += 1u;
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write_ignored(st.out, st.use_color);
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st.out.write_line("");
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}
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}
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}
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}
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}
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let st =
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@{out: io::stdout(),
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use_color: use_color(),
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mutable total: 0u,
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mutable passed: 0u,
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mutable failed: 0u,
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mutable ignored: 0u,
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mutable failures: []};
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run_tests(opts, tests, to_task, bind callback(_, st));
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assert (st.passed + st.failed + st.ignored == st.total);
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let success = st.failed == 0u;
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if !success {
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st.out.write_line("\nfailures:");
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for test: test_desc<T> in st.failures {
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let testname = test.name; // Satisfy alias analysis
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st.out.write_line(#fmt[" %s", testname]);
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}
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}
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st.out.write_str(#fmt["\nresult: "]);
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if success {
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// There's no parallelism at this point so it's safe to use color
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write_ok(st.out, true);
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} else { write_failed(st.out, true); }
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st.out.write_str(#fmt[". %u passed; %u failed; %u ignored\n\n", st.passed,
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st.failed, st.ignored]);
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ret success;
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fn write_ok(out: io::writer, use_color: bool) {
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write_pretty(out, "ok", term::color_green, use_color);
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}
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fn write_failed(out: io::writer, use_color: bool) {
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write_pretty(out, "FAILED", term::color_red, use_color);
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}
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fn write_ignored(out: io::writer, use_color: bool) {
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write_pretty(out, "ignored", term::color_yellow, use_color);
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}
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fn write_pretty(out: io::writer, word: str, color: u8, use_color: bool) {
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if use_color && term::color_supported() {
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term::fg(out.get_buf_writer(), color);
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}
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out.write_str(word);
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if use_color && term::color_supported() {
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term::reset(out.get_buf_writer());
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}
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}
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}
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fn use_color() -> bool { ret get_concurrency() == 1u; }
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tag testevent<T> {
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te_filtered([test_desc<T>]);
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te_wait(test_desc<T>);
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te_result(test_desc<T>, test_result);
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}
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fn run_tests<T>(opts: test_opts, tests: [test_desc<T>],
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to_task: test_to_task<T>,
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callback: fn@(testevent<T>)) {
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let filtered_tests = filter_tests(opts, tests);
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callback(te_filtered(filtered_tests));
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// It's tempting to just spawn all the tests at once but that doesn't
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// provide a great user experience because you might sit waiting for the
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// result of a particular test for an unusually long amount of time.
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let concurrency = get_concurrency();
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log #fmt["using %u test tasks", concurrency];
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let total = vec::len(filtered_tests);
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let run_idx = 0u;
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let wait_idx = 0u;
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let futures = [];
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while wait_idx < total {
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while vec::len(futures) < concurrency && run_idx < total {
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futures += [run_test(filtered_tests[run_idx], to_task)];
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run_idx += 1u;
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}
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let future = futures[0];
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callback(te_wait(future.test));
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let result = future.wait();
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callback(te_result(future.test, result));
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futures = vec::slice(futures, 1u, vec::len(futures));
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wait_idx += 1u;
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}
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}
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fn get_concurrency() -> uint { rustrt::sched_threads() }
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fn filter_tests<T>(opts: test_opts,
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tests: [test_desc<T>]) -> [test_desc<T>] {
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let filtered = tests;
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// Remove tests that don't match the test filter
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filtered = if option::is_none(opts.filter) {
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filtered
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} else {
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let filter_str =
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alt opts.filter {
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option::some(f) { f }
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option::none. { "" }
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};
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fn filter_fn<T>(test: test_desc<T>, filter_str: str) ->
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option::t<test_desc<T>> {
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if str::find(test.name, filter_str) >= 0 {
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ret option::some(test);
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} else { ret option::none; }
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}
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let filter = bind filter_fn(_, filter_str);
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vec::filter_map(filter, filtered)
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};
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// Maybe pull out the ignored test and unignore them
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filtered = if !opts.run_ignored {
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filtered
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} else {
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fn filter<T>(test: test_desc<T>) -> option::t<test_desc<T>> {
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if test.ignore {
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ret option::some({name: test.name,
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fn: test.fn,
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ignore: false,
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should_fail: test.should_fail});
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} else { ret option::none; }
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};
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vec::filter_map(bind filter(_), filtered)
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};
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// Sort the tests alphabetically
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filtered =
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{
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fn lteq<T>(t1: test_desc<T>, t2: test_desc<T>) -> bool {
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str::lteq(t1.name, t2.name)
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}
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sort::merge_sort(bind lteq(_, _), filtered)
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};
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ret filtered;
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}
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type test_future<T> = {test: test_desc<T>, wait: fn@() -> test_result};
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fn run_test<T>(test: test_desc<T>,
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to_task: test_to_task<T>) -> test_future<T> {
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if test.ignore {
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ret {test: test, wait: fn () -> test_result { tr_ignored }};
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}
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let test_task = to_task(test.fn);
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ret {test: test,
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wait:
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bind fn (test_task: joinable, should_fail: bool) -> test_result {
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alt task::join(test_task) {
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task::tr_success. {
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if should_fail { tr_failed }
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else { tr_ok }
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}
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task::tr_failure. {
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if should_fail { tr_ok }
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else { tr_failed }
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}
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}
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}(test_task, test.should_fail)};
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}
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// We need to run our tests in another task in order to trap test failures.
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// This function only works with functions that don't contain closures.
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fn default_test_to_task(&&f: default_test_fn) -> joinable {
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fn run_task(f: default_test_fn) {
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configure_test_task();
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f();
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}
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ret task::spawn_joinable(copy f, run_task);
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}
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// Call from within a test task to make sure it's set up correctly
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fn configure_test_task() {
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// If this task fails we don't want that failure to propagate to the
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// test runner or else we couldn't keep running tests
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task::unsupervise();
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}
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// Local Variables:
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// mode: rust;
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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