diff options
Diffstat (limited to 'Lib/test/test_grammar.py')
| -rw-r--r-- | Lib/test/test_grammar.py | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/Lib/test/test_grammar.py b/Lib/test/test_grammar.py index eff763e..6b326bd 100644 --- a/Lib/test/test_grammar.py +++ b/Lib/test/test_grammar.py @@ -458,7 +458,39 @@ class GrammarTests(unittest.TestCase): check_syntax_error(self, "class foo:return 1") def test_yield(self): + # Allowed as standalone statement + def g(): yield 1 + def g(): yield from () + # Allowed as RHS of assignment + def g(): x = yield 1 + def g(): x = yield from () + # Ordinary yield accepts implicit tuples + def g(): yield 1, 1 + def g(): x = yield 1, 1 + # 'yield from' does not + check_syntax_error(self, "def g(): yield from (), 1") + check_syntax_error(self, "def g(): x = yield from (), 1") + # Requires parentheses as subexpression + def g(): 1, (yield 1) + def g(): 1, (yield from ()) + check_syntax_error(self, "def g(): 1, yield 1") + check_syntax_error(self, "def g(): 1, yield from ()") + # Requires parentheses as call argument + def g(): f((yield 1)) + def g(): f((yield 1), 1) + def g(): f((yield from ())) + def g(): f((yield from ()), 1) + check_syntax_error(self, "def g(): f(yield 1)") + check_syntax_error(self, "def g(): f(yield 1, 1)") + check_syntax_error(self, "def g(): f(yield from ())") + check_syntax_error(self, "def g(): f(yield from (), 1)") + # Not allowed at top level + check_syntax_error(self, "yield") + check_syntax_error(self, "yield from") + # Not allowed at class scope check_syntax_error(self, "class foo:yield 1") + check_syntax_error(self, "class foo:yield from ()") + def test_raise(self): # 'raise' test [',' test] |