def assertExpr(self, text, result):
self.stdin = StringIO(text)
want = "Result: %d" % int(result)
compiler.init(inp=self.stdin, out=self.stdout, err=self.stderr)
compiler.compile()
output = self.stdout.getvalue().split("\n")[-2]
self.assertEqual(output, want)
def test_match(self):
inp = StringIO('mo')
compiler.init(inp=inp, out=self.stdout, err=self.stderr)
self.assertEqual(compiler.Peek, 'm')
compiler.match('m')
self.assertEqual(compiler.Peek, 'o')
with self.assertRaises(SystemExit):
compiler.match('n')
self.assertEqual(self.stderr.getvalue(), "\n'n' expected.\n")
def test_get_word(self):
inp = StringIO('ab1')
compiler.init(inp=inp, out=self.stdout, err=self.stderr)
self.assertEqual(compiler.get_word(), 'a')
self.assertEqual(compiler.get_word(), 'b')
with self.assertRaises(SystemExit):
compiler.get_word()
self.assertEqual(self.stderr.getvalue(), "\n'Word' expected.\n")
def test_get_number(self):
inp = StringIO('12z')
compiler.init(inp=inp, out=self.stdout, err=self.stderr)
self.assertEqual(compiler.get_number(), '1')
self.assertEqual(compiler.get_number(), '2')
with self.assertRaises(SystemExit):
compiler.get_number()
self.assertEqual(self.stderr.getvalue(), "\n'Number' expected.\n")
def test_emitln(self):
compiler.init(inp=StringIO(), out=self.stdout, err=self.stderr)
compiler.emitln('123')
self.assertEqual(self.stdout.getvalue(), "123\n")
def test_emit(self):
compiler.init(inp=StringIO(), out=self.stdout, err=self.stderr)
compiler.emit('abc')
self.assertEqual(self.stdout.getvalue(), 'abc')
def test_get_char(self):
inp = StringIO('abc')
compiler.init(inp=inp, out=self.stdout, err=self.stderr)
self.assertEqual(compiler.get_char(), 'a')
self.assertEqual(compiler.get_char(), 'b')
self.assertEqual(compiler.get_char(), 'c')
def test_expected(self):
compiler.init(inp=StringIO(), out=self.stdout, err=self.stderr)
with self.assertRaises(SystemExit):
compiler.expected('better')
self.assertEqual(self.stderr.getvalue(), "\n'better' expected.\n")
def test_error(self):
compiler.init(inp=StringIO(), out=self.stdout, err=self.stderr)
compiler.error('whoops')
self.assertEqual(self.stderr.getvalue(), "\nwhoops\n")
self.assertEqual(self.stdout.getvalue(), "")
def test_abort(self):
compiler.init(inp=StringIO(), out=self.stdout, err=self.stderr)
with self.assertRaises(SystemExit):
compiler.abort('hello')
self.assertEqual(self.stderr.getvalue(), "\nhello\n")
self.assertEqual(self.stdout.getvalue(), "")