Update test_deprecate_nonkeyword_args.py

Fix tests for the deprecate_nonkeyword_args decorator

Author: alexitkes

pandas/tests/util/test_deprecate_nonkeyword_args.py

@@ -20,8 +20,7 @@ def test_two_arguments():
     Check whether no warnings are displayed if `some_func` called with
     two positional arguments
     """
-    with tm.assert_produces_warning(FutureWarning):
-        s = some_func(1, 2)
+    s = some_func(1, 2)
     assert s == 3
 
 
@@ -30,21 +29,29 @@ def test_two_and_two_arguments():
     Check whether no warnings are displayed if `some_func` called with
     two positional arguments and two keyword arguments
     """
-    with tm.assert_produces_warning(FutureWarning):
-        s = some_func(1, 2, c=3, d=4)
-    assert s == 10
+    s = some_func(1, 2, c=3, d=6)
+    assert s == 12
 
 
 def test_two_and_one_arguments():
     """
     Check whether no warnings are displayed if `some_func` called with
     two positional arguments and one keyword argument
     """
-    with tm.assert_produces_warning(FutureWarning):
-        s = some_func(1, 2, d=12)
+    s = some_func(1, 2, d=12)
     assert s == 15
 
 
+def test_three_arguments():
+    """
+    Check whether a warning is displayed if `some_func` called with
+    three positional arguments
+    """
+    with tm.assert_produces_warning(FutureWarning):
+        s = some_func(1, 2, 5)
+    assert s == 8
+
+
 def test_four_arguments():
     """
     Check whether a warning is displayed if `some_func` called with