Preview: test_hyperparser.py
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/opt/alt/python37/lib64/python3.7/idlelib/idle_test/test_hyperparser.py
"Test hyperparser, coverage 98%."
from idlelib.hyperparser import HyperParser
import unittest
from test.support import requires
from tkinter import Tk, Text
from idlelib.editor import EditorWindow
class DummyEditwin:
def __init__(self, text):
self.text = text
self.indentwidth = 8
self.tabwidth = 8
self.prompt_last_line = '>>>'
self.num_context_lines = 50, 500, 1000
_build_char_in_string_func = EditorWindow._build_char_in_string_func
is_char_in_string = EditorWindow.is_char_in_string
class HyperParserTest(unittest.TestCase):
code = (
'"""This is a module docstring"""\n'
'# this line is a comment\n'
'x = "this is a string"\n'
"y = 'this is also a string'\n"
'l = [i for i in range(10)]\n'
'm = [py*py for # comment\n'
' py in l]\n'
'x.__len__\n'
"z = ((r'asdf')+('a')))\n"
'[x for x in\n'
'for = False\n'
'cliché = "this is a string with unicode, what a cliché"'
)
@classmethod
def setUpClass(cls):
requires('gui')
cls.root = Tk()
cls.root.withdraw()
cls.text = Text(cls.root)
cls.editwin = DummyEditwin(cls.text)
@classmethod
def tearDownClass(cls):
del cls.text, cls.editwin
cls.root.destroy()
del cls.root
def setUp(self):
self.text.insert('insert', self.code)
def tearDown(self):
self.text.delete('1.0', 'end')
self.editwin.prompt_last_line = '>>>'
def get_parser(self, index):
"""
Return a parser object with index at 'index'
"""
return HyperParser(self.editwin, index)
def test_init(self):
"""
test corner cases in the init method
"""
with self.assertRaises(ValueError) as ve:
self.text.tag_add('console', '1.0', '1.end')
p = self.get_parser('1.5')
self.assertIn('precedes', str(ve.exception))
# test without ps1
self.editwin.prompt_last_line = ''
# number of lines lesser than 50
p = self.get_parser('end')
self.assertEqual(p.rawtext, self.text.get('1.0', 'end'))
# number of lines greater than 50
self.text.insert('end', self.text.get('1.0', 'end')*4)
p = self.get_parser('54.5')
def test_is_in_string(self):
get = self.get_parser
p = get('1.0')
self.assertFalse(p.is_in_string())
p = get('1.4')
self.assertTrue(p.is_in_string())
p = get('2.3')
self.assertFalse(p.is_in_string())
p = get('3.3')
self.assertFalse(p.is_in_string())
p = get('3.7')
self.assertTrue(p.is_in_string())
p = get('4.6')
self.assertTrue(p.is_in_string())
p = get('12.54')
self.assertTrue(p.is_in_string())
def test_is_in_code(self):
get = self.get_parser
p = get('1.0')
self.assertTrue(p.is_in_code())
p = get('1.1')
self.assertFalse(p.is_in_code())
p = get('2.5')
self.assertFalse(p.is_in_code())
p = get('3.4')
self.assertTrue(p.is_in_code())
p = get('3.6')
self.assertFalse(p.is_in_code())
p = get('4.14')
self.assertFalse(p.is_in_code())
def test_get_surrounding_bracket(self):
get = self.get_parser
def without_mustclose(parser):
# a utility function to get surrounding bracket
# with mustclose=False
return parser.get_surrounding_brackets(mustclose=False)
def with_mustclose(parser):
# a utility function to get surrounding bracket
# with mustclose=True
return parser.get_surrounding_brackets(mustclose=True)
p = get('3.2')
self.assertIsNone(with_mustclose(p))
self.assertIsNone(without_mustclose(p))
p = get('5.6')
self.assertTupleEqual(without_mustclose(p), ('5.4', '5.25'))
self.assertTupleEqual(without_mustclose(p), with_mustclose(p))
p = get('5.23')
self.assertTupleEqual(without_mustclose(p), ('5.21', '5.24'))
self.assertTupleEqual(without_mustclose(p), with_mustclose(p))
p = get('6.15')
self.assertTupleEqual(without_mustclose(p), ('6.4', '6.end'))
self.assertIsNone(with_mustclose(p))
p = get('9.end')
self.assertIsNone(with_mustclose(p))
self.assertIsNone(without_mustclose(p))
def test_get_expression(self):
get = self.get_parser
p = get('4.2')
self.assertEqual(p.get_expression(), 'y ')
p = get('4.7')
with self.assertRaises(ValueError) as ve:
p.get_expression()
self.assertIn('is inside a code', str(ve.exception))
p = get('5.25')
self.assertEqual(p.get_expression(), 'range(10)')
p = get('6.7')
self.assertEqual(p.get_expression(), 'py')
p = get('6.8')
self.assertEqual(p.get_expression(), '')
p = get('7.9')
self.assertEqual(p.get_expression(), 'py')
p = get('8.end')
self.assertEqual(p.get_expression(), 'x.__len__')
p = get('9.13')
self.assertEqual(p.get_expression(), "r'asdf'")
p = get('9.17')
with self.assertRaises(ValueError) as ve:
p.get_expression()
self.assertIn('is inside a code', str(ve.exception))
p = get('10.0')
self.assertEqual(p.get_expression(), '')
p = get('10.6')
self.assertEqual(p.get_expression(), '')
p = get('10.11')
self.assertEqual(p.get_expression(), '')
p = get('11.3')
self.assertEqual(p.get_expression(), '')
p = get('11.11')
self.assertEqual(p.get_expression(), 'False')
p = get('12.6')
self.assertEqual(p.get_expression(), 'cliché')
def test_eat_identifier(self):
def is_valid_id(candidate):
result = HyperParser._eat_identifier(candidate, 0, len(candidate))
if result == len(candidate):
return True
elif result == 0:
return False
else:
err_msg = "Unexpected result: {} (expected 0 or {}".format(
result, len(candidate)
)
raise Exception(err_msg)
# invalid first character which is valid elsewhere in an identifier
self.assertFalse(is_valid_id('2notid'))
# ASCII-only valid identifiers
self.assertTrue(is_valid_id('valid_id'))
self.assertTrue(is_valid_id('_valid_id'))
self.assertTrue(is_valid_id('valid_id_'))
self.assertTrue(is_valid_id('_2valid_id'))
# keywords which should be "eaten"
self.assertTrue(is_valid_id('True'))
self.assertTrue(is_valid_id('False'))
self.assertTrue(is_valid_id('None'))
# keywords which should not be "eaten"
self.assertFalse(is_valid_id('for'))
self.assertFalse(is_valid_id('import'))
self.assertFalse(is_valid_id('return'))
# valid unicode identifiers
self.assertTrue(is_valid_id('cliche'))
self.assertTrue(is_valid_id('cliché'))
self.assertTrue(is_valid_id('a٢'))
# invalid unicode identifiers
self.assertFalse(is_valid_id('2a'))
self.assertFalse(is_valid_id('٢a'))
self.assertFalse(is_valid_id('a²'))
# valid identifier after "punctuation"
self.assertEqual(HyperParser._eat_identifier('+ var', 0, 5), len('var'))
self.assertEqual(HyperParser._eat_identifier('+var', 0, 4), len('var'))
self.assertEqual(HyperParser._eat_identifier('.var', 0, 4), len('var'))
# invalid identifiers
self.assertFalse(is_valid_id('+'))
self.assertFalse(is_valid_id(' '))
self.assertFalse(is_valid_id(':'))
self.assertFalse(is_valid_id('?'))
self.assertFalse(is_valid_id('^'))
self.assertFalse(is_valid_id('\\'))
self.assertFalse(is_valid_id('"'))
self.assertFalse(is_valid_id('"a string"'))
def test_eat_identifier_various_lengths(self):
eat_id = HyperParser._eat_identifier
for length in range(1, 21):
self.assertEqual(eat_id('a' * length, 0, length), length)
self.assertEqual(eat_id('é' * length, 0, length), length)
self.assertEqual(eat_id('a' + '2' * (length - 1), 0, length), length)
self.assertEqual(eat_id('é' + '2' * (length - 1), 0, length), length)
self.assertEqual(eat_id('é' + 'a' * (length - 1), 0, length), length)
self.assertEqual(eat_id('é' * (length - 1) + 'a', 0, length), length)
self.assertEqual(eat_id('+' * length, 0, length), 0)
self.assertEqual(eat_id('2' + 'a' * (length - 1), 0, length), 0)
self.assertEqual(eat_id('2' + 'é' * (length - 1), 0, length), 0)
if __name__ == '__main__':
unittest.main(verbosity=2)
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