CaptureStderr will execute a provided function and capture anything written to stderr.

CaptureStdout will execute a provided function and capture anything written to stdout.

CopyTestFileToConfigDir copies a file in a relatve `testdata` dir to the caller of this function to the config dir as some target filename with some target FileMode.

CreateConfigFile will create a file in the config dir with the given file name.

GetTestDataDir returns the path to the caller's `testdata` directory.

GetTestFile returns the path to the given fileName in the calling function's `testdata` directory.

PrepareDir prepares a path for use in tests (ensures it exists and ensures the path is concistent).

ReadConfigFile will read the contents of a file in the config dir.

ReadTestFile will read the contents of a file from the `testdata` directory relative to the path of the calling function file.

RemoveConfigFile will remove a file from the config dir with the given file name.

StatConfigFile returns the os.FileInfo for a file in the config dir.

WrapStdin will fill stdin with the lines provided as a variadic list of strings before executing the provided function.

WrapStdinWithDelay will fill stdin with the lines provided, but with a given delay before each write.