1 files changed, 75 insertions, 0 deletions
diff --git a/tests/functional/s/singledispatch/singledispatch_functions.py b/tests/functional/s/singledispatch/singledispatch_functions.py
new file mode 100644
index 000000000..931bfd30d
--- /dev/null
+++ b/tests/functional/s/singledispatch/singledispatch_functions.py
@@ -0,0 +1,75 @@
+# pylint: disable=missing-docstring,import-error,unused-import,assignment-from-no-return
+# pylint: disable=invalid-name, too-few-public-methods
+from UNINFERABLE import uninferable_func
+
+try:
+    from functools import singledispatch
+except ImportError:
+    from singledispatch import singledispatch
+
+my_single_dispatch = singledispatch
+
+
+class FakeSingleDispatch:
+
+    @staticmethod
+    def register(function):
+        return function
+
+    def __call__(self, function):
+        return function
+
+fake_singledispatch_decorator = FakeSingleDispatch()
+
+@singledispatch
+def func(arg):
+    return arg
+
+
+@func.register(str)
+def _(arg):
+    return 42
+
+
+@func.register(float)
+@func.register(int)
+def _(arg):
+    return 42
+
+
+@my_single_dispatch
+def func2(arg):
+    return arg
+
+
+@func2.register(int)
+def _(arg):
+    return 42
+
+
+@singledispatch
+def with_extra_arg(arg, verbose=False):
+    if verbose:
+        print(arg)
+    return arg
+
+
+@with_extra_arg.register(str)
+def _(arg, verbose=False):
+    unused = 42 # [unused-variable]
+    return arg[::-1]
+
+
+@fake_singledispatch_decorator
+def not_single_dispatch(arg): # [unused-argument]
+    return 'not yet implemented'
+
+
+@fake_singledispatch_decorator.register(str)
+def bad_single_dispatch(arg): # [unused-argument]
+    return 42
+
+
+@fake_singledispatch_decorator.register(str)
+def bad_single_dispatch(arg): # [unused-argument, function-redefined]
+    return 24