"""Test suite for 2to3's parser and grammar files. This is the place to add tests for changes to 2to3's grammar, such as those merging the grammars for Python 2 and 3. In addition to specific tests for parts of the grammar we've changed, we also make sure we can parse the test_grammar.py files from both Python 2 and Python 3. """ #from . import support #from .support import driver #from test.support import verbose from textwrap import dedent from jedi.parser import Parser, load_grammar, ParseError import pytest from test.helpers import TestCase #from lib2to3.pygram import python_symbols as syms def parse(code, version='3.4'): code = dedent(code) + "\n\n" grammar = load_grammar(version=version) return Parser(grammar, code, 'file_input').get_parsed_node() class TestDriver(TestCase): def test_formfeed(self): s = """print 1\n\x0Cprint 2\n""" t = parse(s, '2.7') self.assertEqual(t.children[0].children[0].type, 'print_stmt') self.assertEqual(t.children[1].children[0].type, 'print_stmt') s = """1\n\x0C\x0C2\n""" t = parse(s, '2.7') class GrammarTest(TestCase): def invalid_syntax(self, code, **kwargs): try: parse(code, **kwargs) except ParseError: pass else: raise AssertionError("Syntax shouldn't have been valid") class TestMatrixMultiplication(GrammarTest): @pytest.mark.skipif('sys.version_info[0] < 3.5') def test_matrix_multiplication_operator(self): parse("a @ b") parse("a @= b") class TestYieldFrom(GrammarTest): def test_yield_from(self): parse("yield from x") parse("(yield from x) + y") self.invalid_syntax("yield from") class TestAsyncAwait(GrammarTest): @pytest.mark.skipif('sys.version_info[0] < 3.5') def test_await_expr(self): parse("""async def foo(): await x """) parse("""async def foo(): def foo(): pass def foo(): pass await x """) parse("""async def foo(): return await a""") parse("""def foo(): def foo(): pass async def foo(): await x """) self.invalid_syntax("await x") self.invalid_syntax("""def foo(): await x""") self.invalid_syntax("""def foo(): def foo(): pass async def foo(): pass await x """) @pytest.mark.skipif('sys.version_info[0] < 3.5') def test_async_var(self): parse("""async = 1""") parse("""await = 1""") parse("""def async(): pass""") @pytest.mark.skipif('sys.version_info[0] < 3.5') def test_async_with(self): parse("""async def foo(): async for a in b: pass""") self.invalid_syntax("""def foo(): async for a in b: pass""") @pytest.mark.skipif('sys.version_info[0] < 3.5') def test_async_for(self): parse("""async def foo(): async with a: pass""") self.invalid_syntax("""def foo(): async with a: pass""") class TestRaiseChanges(GrammarTest): def test_2x_style_1(self): parse("raise") def test_2x_style_2(self): parse("raise E, V", version='2.7') def test_2x_style_3(self): parse("raise E, V, T", version='2.7') def test_2x_style_invalid_1(self): self.invalid_syntax("raise E, V, T, Z", version='2.7') def test_3x_style(self): parse("raise E1 from E2") def test_3x_style_invalid_1(self): self.invalid_syntax("raise E, V from E1") def test_3x_style_invalid_2(self): self.invalid_syntax("raise E from E1, E2") def test_3x_style_invalid_3(self): self.invalid_syntax("raise from E1, E2") def test_3x_style_invalid_4(self): self.invalid_syntax("raise E from") # Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testFuncdef class TestFunctionAnnotations(GrammarTest): def test_1(self): parse("""def f(x) -> list: pass""") def test_2(self): parse("""def f(x:int): pass""") def test_3(self): parse("""def f(*x:str): pass""") def test_4(self): parse("""def f(**x:float): pass""") def test_5(self): parse("""def f(x, y:1+2): pass""") def test_6(self): self.invalid_syntax("""def f(a, (b:1, c:2, d)): pass""") def test_7(self): self.invalid_syntax("""def f(a, (b:1, c:2, d), e:3=4, f=5, *g:6): pass""") def test_8(self): s = """def f(a, (b:1, c:2, d), e:3=4, f=5, *g:6, h:7, i=8, j:9=10, **k:11) -> 12: pass""" self.invalid_syntax(s) class TestExcept(GrammarTest): def test_new(self): s = """ try: x except E as N: y""" parse(s) def test_old(self): s = """ try: x except E, N: y""" parse(s, version='2.7') # Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testAtoms class TestSetLiteral(GrammarTest): def test_1(self): parse("""x = {'one'}""") def test_2(self): parse("""x = {'one', 1,}""") def test_3(self): parse("""x = {'one', 'two', 'three'}""") def test_4(self): parse("""x = {2, 3, 4,}""") class TestNumericLiterals(GrammarTest): def test_new_octal_notation(self): parse("""0o7777777777777""") self.invalid_syntax("""0o7324528887""") def test_new_binary_notation(self): parse("""0b101010""") self.invalid_syntax("""0b0101021""") class TestClassDef(GrammarTest): def test_new_syntax(self): parse("class B(t=7): pass") parse("class B(t, *args): pass") parse("class B(t, **kwargs): pass") parse("class B(t, *args, **kwargs): pass") parse("class B(t, y=9, *args, **kwargs): pass") class TestParserIdempotency(TestCase): """A cut-down version of pytree_idempotency.py.""" def test_extended_unpacking(self): parse("a, *b, c = x\n") parse("[*a, b] = x\n") parse("(z, *y, w) = m\n") parse("for *z, m in d: pass\n") class TestLiterals(GrammarTest): def test_multiline_bytes_literals(self): s = """ md5test(b"\xaa" * 80, (b"Test Using Larger Than Block-Size Key " b"and Larger Than One Block-Size Data"), "6f630fad67cda0ee1fb1f562db3aa53e") """ parse(s) def test_multiline_bytes_tripquote_literals(self): s = ''' b""" """ ''' parse(s) def test_multiline_str_literals(self): s = """ md5test("\xaa" * 80, ("Test Using Larger Than Block-Size Key " "and Larger Than One Block-Size Data"), "6f630fad67cda0ee1fb1f562db3aa53e") """ parse(s)