add test boilerplate

test/has_duplicates/has_duplicates.test.py

@@ -0,0 +1,6 @@
+import types,functools
+from pytape import test
+from has_duplicates import has_duplicates
+def has_duplicates(t):
+    t.true(isinstance(has_duplicates, (types.BuiltinFunctionType, types.FunctionType, functools.partial)),'has_duplicates is a function')
+test('Testing has_duplicates',has_duplicates_test)