1 files changed, 244 insertions, 0 deletions
diff --git a/tests/functional/a/arguments.py b/tests/functional/a/arguments.py
new file mode 100644
index 000000000..816208d29
--- /dev/null
+++ b/tests/functional/a/arguments.py
@@ -0,0 +1,244 @@
+# pylint: disable=too-few-public-methods, no-absolute-import,missing-docstring,import-error,wrong-import-position
+# pylint: disable=wrong-import-order, useless-object-inheritance,unnecessary-lambda
+
+def decorator(fun):
+    """Decorator"""
+    return fun
+
+
+class DemoClass(object):
+    """Test class for method invocations."""
+
+    @staticmethod
+    def static_method(arg):
+        """static method."""
+        return arg + arg
+
+    @classmethod
+    def class_method(cls, arg):
+        """class method"""
+        return arg + arg
+
+    def method(self, arg):
+        """method."""
+        return (self, arg)
+
+    @decorator
+    def decorated_method(self, arg):
+        """decorated method."""
+        return (self, arg)
+
+
+def function_1_arg(first_argument):
+    """one argument function"""
+    return first_argument
+
+def function_3_args(first_argument, second_argument, third_argument):
+    """three arguments function"""
+    return first_argument, second_argument, third_argument
+
+def function_default_arg(one=1, two=2):
+    """fonction with default value"""
+    return two, one
+
+
+function_1_arg(420)
+function_1_arg()  # [no-value-for-parameter]
+function_1_arg(1337, 347)  # [too-many-function-args]
+
+function_3_args(420, 789)  # [no-value-for-parameter]
+# +1:[no-value-for-parameter,no-value-for-parameter,no-value-for-parameter]
+function_3_args()
+function_3_args(1337, 347, 456)
+function_3_args('bab', 'bebe', None, 5.6)  # [too-many-function-args]
+
+function_default_arg(1, two=5)
+function_default_arg(two=5)
+
+function_1_arg(bob=4)  # [unexpected-keyword-arg,no-value-for-parameter]
+function_default_arg(1, 4, coin="hello")  # [unexpected-keyword-arg]
+
+function_default_arg(1, one=5)  # [redundant-keyword-arg]
+
+# Remaining tests are for coverage of correct names in messages.
+LAMBDA = lambda arg: 1
+
+LAMBDA()  # [no-value-for-parameter]
+
+def method_tests():
+    """Method invocations."""
+    demo = DemoClass()
+    demo.static_method()  # [no-value-for-parameter]
+    DemoClass.static_method()  # [no-value-for-parameter]
+
+    demo.class_method()  # [no-value-for-parameter]
+    DemoClass.class_method()  # [no-value-for-parameter]
+
+    demo.method()  # [no-value-for-parameter]
+    DemoClass.method(demo)  # [no-value-for-parameter]
+
+    demo.decorated_method()  # [no-value-for-parameter]
+    DemoClass.decorated_method(demo)  # [no-value-for-parameter]
+
+# Test a regression (issue #234)
+import sys
+
+class Text(object):
+    """ Regression """
+
+    if sys.version_info > (3,):
+        def __new__(cls):
+            """ empty """
+            return object.__new__(cls)
+    else:
+        def __new__(cls):
+            """ empty """
+            return object.__new__(cls)
+
+Text()
+
+class TestStaticMethod(object):
+
+    @staticmethod
+    def test(first, second=None, **kwargs):
+        return first, second, kwargs
+
+    def func(self):
+        self.test(42)
+        self.test(42, second=34)
+        self.test(42, 42)
+        self.test() # [no-value-for-parameter]
+        self.test(42, 42, 42) # [too-many-function-args]
+
+
+class TypeCheckConstructor(object):
+    def __init__(self, first, second):
+        self.first = first
+        self.second = second
+    def test(self):
+        type(self)(1, 2, 3) # [too-many-function-args]
+        # +1: [no-value-for-parameter,no-value-for-parameter]
+        type(self)()
+        type(self)(1, lala=2) # [no-value-for-parameter,unexpected-keyword-arg]
+        type(self)(1, 2)
+        type(self)(first=1, second=2)
+
+
+class Test(object):
+    """ lambda needs Test instance as first argument """
+    lam = lambda self, icon: (self, icon)
+
+    def test(self):
+        self.lam(42)
+        self.lam() # [no-value-for-parameter]
+        self.lam(1, 2, 3) # [too-many-function-args]
+
+Test().lam() # [no-value-for-parameter]
+
+# Don't emit a redundant-keyword-arg for this example,
+# it's perfectly valid
+
+class Issue642(object):
+    attr = 0
+    def __str__(self):
+        return "{self.attr}".format(self=self)
+
+# These should not emit anything regarding the number of arguments,
+# since they have something invalid.
+from ala_bala_portocola import unknown
+
+# pylint: disable=not-a-mapping,not-an-iterable
+
+function_1_arg(*unknown)
+function_1_arg(1, *2)
+function_1_arg(1, 2, 3, **unknown)
+function_1_arg(4, 5, **1)
+function_1_arg(5, 6, **{unknown: 1})
+function_1_arg(**{object: 1})
+function_1_arg(**{1: 2})
+
+def no_context_but_redefined(*args):
+    args = [1]
+    #+1: [no-value-for-parameter, no-value-for-parameter]
+    expect_three(*list(args))
+
+def no_context_one_elem(*args):
+    expect_three(args) # [no-value-for-parameter, no-value-for-parameter]
+
+# Don't emit no-value-for-parameter for this, since we
+# don't have the context at our disposal.
+def expect_three(one, two, three):
+    return one + two + three
+
+
+def no_context(*args):
+    expect_three(*args)
+
+def no_context_two(*args):
+    expect_three(*list(args))
+
+def no_context_three(*args):
+    expect_three(*set(args))
+
+def compare_prices(arg):
+    return set((arg, ))
+
+def find_problems2(prob_dates):
+    for fff in range(10):
+        prob_dates |= compare_prices(fff)
+
+
+from collections import namedtuple
+
+
+def namedtuple_replace_issue_1036():
+    cls = namedtuple('cls', 'a b c')
+    new_instance = cls(1, 2, 3)._replace(
+        a=24,
+        b=24,
+        c=42
+    )
+    # +1:[unexpected-keyword-arg,unexpected-keyword-arg]
+    new_bad_instance = cls(1, 2, 3)._replace(d=24, e=32)
+    return new_instance, new_bad_instance
+
+
+from functools import partial
+
+def some_func(first, second, third):
+    return first + second + third
+
+
+partial(some_func, 1, 2)(3)
+partial(some_func, third=1, second=2)(3)
+partial(some_func, 1, third=2)(second=3)
+partial(some_func, 1)(1)  # [no-value-for-parameter]
+partial(some_func, 1)(third=1)  # [no-value-for-parameter]
+partial(some_func, 1, 2)(third=1, fourth=4)  # [unexpected-keyword-arg]
+
+
+def mutation_decorator(fun):
+    """Decorator that changes a function's signature."""
+    def wrapper(*args, do_something=True, **kwargs):
+        if do_something:
+            return fun(*args, **kwargs)
+
+        return None
+
+    return wrapper
+
+
+@mutation_decorator
+def mutated_function(arg):
+    return arg
+
+
+mutated_function(do_something=False)
+mutated_function()
+
+
+def func(one, two, three):
+    return one + two + three
+
+
+CALL = lambda *args: func(*args)