Modify tests for arguments-differ

This commit modifies the tests of arguments-differ output messages based on different error messages.
It is part one of the issue pylint-dev#3536

tests/functional/a/arguments_differ.py

@@ -3,13 +3,13 @@
 
 class Parent(object):
 
-    def test(self):
+    def test(self, arg: bool):
         pass
 
 
 class Child(Parent):
 
-    def test(self, arg): # [arguments-differ]
+    def test(self, arg: int): #[arguments-differ]
         pass
 
 
@@ -27,7 +27,7 @@ def test(self, arg=None): # [arguments-differ]
 class Classmethod(object):
 
     @classmethod
-    def func(cls, data):
+    def func(cls, data: str):
         return data
 
     @classmethod
@@ -56,20 +56,20 @@ def fromkeys(cls, arg, arg1):
 
 class Varargs(object):
 
-    def has_kwargs(self, arg, **kwargs):
+    def has_kwargs(self, arg: bool, **kwargs):
         pass
 
-    def no_kwargs(self, args):
+    def no_kwargs(self, args: bool):
         pass
 
 
 class VarargsChild(Varargs):
 
-    def has_kwargs(self, arg): # [arguments-differ]
-        "Not okay to lose capabilities."
+    def has_kwargs(self, arg: int): #[arguments-differ, arguments-differ]
+        "Not okay to lose capabilities. Also, type has changed."
 
-    def no_kwargs(self, arg, **kwargs): # [arguments-differ]
-        "Not okay to add extra capabilities."
+    def no_kwargs(self, arg: bool, **kwargs): # [arguments-differ]
+        "Addition of kwargs does not violate LSP, but first argument's name has changed."
 
 
 class Super(object):
@@ -111,14 +111,14 @@ def method(self, param='abc'):
 class Staticmethod(object):
 
     @staticmethod
-    def func(data):
+    def func(data: int):
         return data
 
 
 class StaticmethodChild(Staticmethod):
 
     @classmethod
-    def func(cls, data):
+    def func(cls, data: str):
         return data
 
 
@@ -169,7 +169,7 @@ def test(self, *args):
 
 class SecondChangesArgs(FirstHasArgs):
 
-    def test(self, first, second, *args): # [arguments-differ]
+    def test(self, first: int, second: int, *args): # [arguments-differ]
         pass
 
 
@@ -213,23 +213,25 @@ def mixed(self, first, *args, third, **kwargs):
 
 class HasSpecialMethod(object):
 
-    def __getitem__(self, key):
+    def __getitem__(self, key: int):
         return key
 
 
 class OverridesSpecialMethod(HasSpecialMethod):
 
-    def __getitem__(self, cheie):
+    def __getitem__(self, cheie: int): #[arguments-differ]
         return cheie + 1
 
 
 class ParentClass(object):
 
-    def meth(self, arg, arg1):
+    def meth(self, arg: str, arg1: str):
         raise NotImplementedError
 
 
 class ChildClass(ParentClass):
 
-    def meth(self, _arg, dummy):
+    def meth(self, _arg: str, dummy: str):
+        # no error here, "dummy" and "_" are being ignored if
+        # spotted in a variable name (declared in dummy_parameter_regex)
         pass

tests/functional/a/arguments_differ.txt

@@ -1,6 +1,8 @@
-arguments-differ:12:4:Child.test:Parameters differ from overridden 'test' method
-arguments-differ:23:4:ChildDefaults.test:Parameters differ from overridden 'test' method
-arguments-differ:41:4:ClassmethodChild.func:Parameters differ from overridden 'func' method
-arguments-differ:68:4:VarargsChild.has_kwargs:Parameters differ from overridden 'has_kwargs' method
-arguments-differ:71:4:VarargsChild.no_kwargs:Parameters differ from overridden 'no_kwargs' method
-arguments-differ:172:4:SecondChangesArgs.test:Parameters differ from overridden 'test' method
+arguments-differ:12:4:Child.test:Parameter 'arg' was of type 'bool' and is now of type 'int' in overridden 'Child.test' method
+arguments-differ:23:4:ChildDefaults.test:Number of parameters has changed in overridden 'ChildDefaults.test' method
+arguments-differ:41:4:ClassmethodChild.func:Number of parameters has changed in overridden 'ClassmethodChild.func' method
+arguments-differ:68:4:VarargsChild.has_kwargs:Parameter 'arg' was of type 'bool' and is now of type 'int' in overridden 'VarargsChild.has_kwargs' method
+arguments-differ:68:4:VarargsChild.has_kwargs:Variadics removed in overridden 'VarargsChild.has_kwargs' method
+arguments-differ:71:4:VarargsChild.no_kwargs:Parameter 'args' has been renamed in overridden 'VarargsChild.no_kwargs' method
+arguments-differ:172:4:SecondChangesArgs.test:Number of parameters has changed in overridden 'SecondChangesArgs.test' method
+arguments-differ:222:4:OverridesSpecialMethod.__getitem__:Parameter 'key' has been renamed in overridden 'OverridesSpecialMethod.__getitem__' method