def setUp(self):
self.lexer = Lexer()
class TestLexer(unittest.TestCase):
def setUp(self):
self.lexer = Lexer()
def testEmptyInputSetsCursorToEOF(self):
self.lexer.parse('')
self.assertEqual(self.lexer.c, EOF)
def testDoesReset(self):
c, cursor, string = self.lexer.c, self.lexer.cursor, self.lexer.string
self.lexer.parse('')
self.lexer._reset()
self.assertEqual(c, self.lexer.c)
self.assertEqual(cursor, self.lexer.cursor)
self.assertEqual(string, self.lexer.string)
def testCursorIsPrimed(self):
self.lexer.parse("foo")
self.assertEqual(self.lexer.c, 'f')
def testCanConsume(self):
self.lexer.parse("foo")
self.lexer.consume()
self.assertEqual(self.lexer.c, 'o')
self.assertEqual(self.lexer.cursor, 1)
def testCanReachEOF(self):
self.lexer.parse("f")
self.lexer.consume()
self.assertEqual(self.lexer.c, EOF)
def testPassingInJunk(self):
self.assertRaises(TypeError, self.lexer.parse, 100)
self.assertRaises(TypeError, self.lexer.parse, [])