only 测试
\only tests
如果 Node.js 使用 --test-only 命令行选项启动,则可以通过将 only 选项传给应该运行的测试来跳过除选定子集之外的所有顶层测试。当运行带有 only 选项集的测试时,所有子测试也会运行。测试上下文的 runOnly() 方法可用于在子测试级别实现相同的行为。
\If Node.js is started with the --test-only command-line option, it is
possible to skip all top level tests except for a selected subset by passing
the only option to the tests that should be run. When a test with the only
option set is run, all subtests are also run. The test context's runOnly()
method can be used to implement the same behavior at the subtest level.
// Assume Node.js is run with the --test-only command-line option.
// The 'only' option is set, so this test is run.
test('this test is run', { only: true }, async (t) => {
// Within this test, all subtests are run by default.
await t.test('running subtest');
// The test context can be updated to run subtests with the 'only' option.
t.runOnly(true);
await t.test('this subtest is now skipped');
await t.test('this subtest is run', { only: true });
// Switch the context back to execute all tests.
t.runOnly(false);
await t.test('this subtest is now run');
// Explicitly do not run these tests.
await t.test('skipped subtest 3', { only: false });
await t.test('skipped subtest 4', { skip: true });
});
// The 'only' option is not set, so this test is skipped.
test('this test is not run', () => {
// This code is not run.
throw new Error('fail');
});