scannertest

README

Package scannertest provides helpers for automated testing of scanners/lexers/tokenizers.

Documentation

Index

• func TestStates(name string, src io.Reader, scanner Interface) error
• type Interface

Functions

func TestStates

func TestStates(name string, src io.Reader, scanner Interface) error

TestStates reads golex definitions from src, assuming they come from name. The test uses the computed DFA to synthesize test inputs for the scanner.

Types

type Interface

type Interface interface {
	// Init initializes the scanner with src, which is assumed to come from name.
	Init(name string, src []byte) error
	// Rune returns any rune for class c and indicated if the class is valid.
	Rune(c byte) (r rune, ok bool)
	// Scan scans the source set by Init and returns and error if the source does
	// not start with a valid token.
	Scan() error
}

Interface wraps methods of the tested scanner/lexer/tokenizer.