[Python-checkins] r54087 - sandbox/trunk/2to3/tests/test_grammar.py

Fri Mar 2 21:29:30 CET 2007

Author: collin.winter
Date: Fri Mar 2 21:29:28 2007
New Revision: 54087
Added:
 sandbox/trunk/2to3/tests/test_grammar.py (contents, props changed)
Log:
Add a test suite for grammar changes.
Added: sandbox/trunk/2to3/tests/test_grammar.py
==============================================================================

--- (empty file)
+++ sandbox/trunk/2to3/tests/test_grammar.py	Fri Mar 2 21:29:28 2007
@@ -0,0 +1,100 @@
+#!/usr/bin/env python2.5
+""" Test suite for Grammar.txt. This is the place to add tests for
+changes to 2to3's grammar, such as those merging the grammars for
+Python 2 and 3. """
+# Author: Collin Winter
+
+# Testing imports
+import support
+if __name__ == '__main__':
+ support.adjust_path()
+
+# Python imports
+import os.path
+
+# Local imports
+import pytree
+from pgen2 import driver
+from pgen2.parse import ParseError
+
+
+grammar_path = os.path.join(os.path.dirname(__file__), "..", "Grammar.txt")
+grammar = driver.load_grammar(grammar_path)
+driver = driver.Driver(grammar, convert=pytree.convert)
+
+class GrammarTest(support.TestCase):
+ def validate(self, code):
+ driver.parse_string(support.reformat(code), debug=True)
+ 
+ def invalid_syntax(self, code):
+ try:
+ self.validate(code)
+ except ParseError:
+ pass
+
+
+# Adapated from Python 3's Lib/test/test_grammar.py:GrammarTests.testFuncdef
+class TestFunctionAnnotations(GrammarTest):
+ def test_1(self):
+ self.validate("""def f(x) -> list: pass""")
+ 
+ def test_2(self):
+ self.validate("""def f(x:int): pass""")
+ 
+ def test_3(self):
+ self.validate("""def f(*x:str): pass""")
+ 
+ def test_4(self):
+ self.validate("""def f(**x:float): pass""")
+ 
+ def test_5(self):
+ self.validate("""def f(x, y:1+2): pass""")
+ 
+ def test_6(self):
+ self.validate("""def f(a, (b:1, c:2, d)): pass""")
+ 
+ def test_7(self):
+ self.validate("""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.validate(s)
+
+
+class TestExcept(GrammarTest):
+ def test_new(self):
+ s = """
+ try:
+ x
+ except E as N:
+ y""" 
+ self.validate(s)
+ 
+ def test_old(self):
+ s = """
+ try:
+ x
+ except E, N:
+ y""" 
+ self.validate(s)
+
+
+# Adapted from Python 3's Lib/test/test_grammar.py:GrammarTests.testAtoms 
+class TestSetLiteral(GrammarTest):
+ def test_1(self):
+ self.validate("""x = {'one'}""")
+ 
+ def test_2(self):
+ self.validate("""x = {'one', 1,}""")
+ 
+ def test_3(self):
+ self.validate("""x = {'one', 'two', 'three'}""")
+ 
+ def test_4(self):
+ self.validate("""x = {2, 3, 4,}""")
+
+
+if __name__ == "__main__":
+ import __main__
+ support.run_all_tests(__main__)
