The name of the folder that this test will use with @tapjs/fixture!index.TestFixtures#testdir.
By default, it uses a folder name based on the name of the test file
and subtest, within .tap/fixtures in the root of the project.
Create a fixture object for use in a @tapjs/fixture!index.TestFixtures#testdir method.
Create a test directory, optionally filling it up with contents
The testdir will be automatically deleted at the end of the test.
To not delete the directory after the test, use the
saveFixture: true option when creating the test, or specify
--save-fixture on the command line or in the tap configuration.
Optionalcontent: FixtureDirContent
Set whether the fixture should be saved or not
Must be set BEFORE calling @tapjs/fixture!index.TestFixtures#testdir, or it will not have any effect.