tests for constant tuple caching

tests/run/tuple_constants.pyx

+
+cimport cython
+
+module_level_tuple = (1,2,3)
+
+def return_module_level_tuple():
+    """
+    >>> return_module_level_tuple()
+    (1, 2, 3)
+    """
+    return module_level_tuple
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_empty_tuple():
+    """
+    >>> return_empty_tuple()
+    ()
+    """
+    return ()
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_constant_tuple1():
+    """
+    >>> return_constant_tuple1()
+    (1,)
+    """
+    return (1,)
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_folded_tuple():
+    """
+    >>> return_folded_tuple()
+    (1, 2, 3)
+    """
+    return (1, 1+1, 1+1+1)
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_nested_tuple():
+    """
+    >>> return_nested_tuple()
+    (1, (2, 3), (3, (4, 5)))
+    """
+    return (1, (2, 3), (3, (4, 5)))
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def constant_tuple1():
+    """
+    >>> constant_tuple1()
+    (1,)
+    """
+    tuple1 = (1,)
+    return tuple1
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_constant_tuple2():
+    """
+    >>> return_constant_tuple2()
+    (1, 2)
+    """
+    return (1,2)
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_constant_tuple_strings():
+    """
+    >>> return_constant_tuple_strings()
+    ('tuple_1', 'bc', 'tuple_2')
+    """
+    return ('tuple_1', 'bc', 'tuple_2')
+
+@cython.test_assert_path_exists("//TupleNode",
+                                "//TupleNode[@is_literal = true]")
+@cython.test_fail_if_path_exists("//TupleNode[@is_literal = false]")
+def return_constant_tuples_string_types():
+    """
+    >>> a,b,c = return_constant_tuples_string_types()
+    >>> a is b
+    False
+    >>> a is c
+    False
+    >>> b is c
+    False
+    """
+    return ('a', 'bc'), (u'a', u'bc'), (b'a', b'bc')
+
+@cython.test_assert_path_exists("//ReturnStatNode//TupleNode",
+                                "//ReturnStatNode//TupleNode[@is_literal = false]")
+@cython.test_fail_if_path_exists("//ReturnStatNode//TupleNode[@is_literal = true]")
+def return_nonconstant_tuple():
+    """
+    >>> return_nonconstant_tuple()
+    ('a', 1, 'd')
+    """
+    a = eval("1")
+    return ('a', a, 'd')