exectest

Documentation

Index

• func Command(t test.T, main func()) *exec.Cmd
• func StartWithOutput(t test.T, cmd *exec.Cmd) io.Reader

Functions

func Command

func Command(t test.T, main func()) *exec.Cmd

Command builds an exec.Cmd that will run the given function as an external executable.

This operates by re-running the test executable to run only the current test, and hijacking that test execution to run the main function.

cmd := Command(t, func() { fmt.Println("hello") })
got, err := cmd.Output()
...
fmt.Println(string(got) == "hello\n") // true

func StartWithOutput

func StartWithOutput(t test.T, cmd *exec.Cmd) io.Reader

StartWithOutput starts the given command, and returns an io.Reader that reads from both, its stdout and stderr.

At test end, the system will ensure that the command finished running.