IgnoreMissedCoverage causes any missed coverage information (for example when a function passed to RunMain calls os.Exit, for example) to be ignored.

RunDir runs the tests in the given directory.

RunMain should be called within a TestMain function to allow subcommands to be run in the testscript context.

RunT is like Run but uses an interface type instead of the concrete *testing.T type to make it possible to use testscript functionality outside of go test.

Env holds the environment to use at the start of a test script invocation.

Params holds parameters for a call to Run.

A Script holds execution state for a single test script.

T holds all the methods of the *testing.T type that are used by testscript.

TestingM is implemented by *testing.M.