Added module to execute arbitrary user defined functions

Author: rjtokenring

appslab_modules/steps/execute_function/__init__.py

@@ -0,0 +1,9 @@
+
+class ExecuteFunction:
+    def __init__(self, function :callable):
+        if function == None:
+            raise ValueError("Function is None")
+        self.function = function
+
+    def process(self, item):
+        return self.function(item)

appslab_modules/steps/execute_function/module_config.yaml

@@ -0,0 +1,2 @@
+name: execute_function
+module_description: "Module that allow the execute of a user defined function."

appslab_modules/steps/execute_function/test_execute_function.py

@@ -0,0 +1,24 @@
+import unittest
+from __init__ import ExecuteFunction
+
+class TestExecuteFunction(unittest.TestCase):
+
+    def test_load_no_function(self):
+        """Test loading with no function."""
+        with self.assertRaises(ValueError):
+            ps = ExecuteFunction(None)
+
+    def test_execute(self):
+        """Test successfull function execution."""
+
+        def my_function(item):
+            return f"Function executed with {item}"
+        
+        input_data = '{"test_key": "test_val"}'
+
+        ps = ExecuteFunction(my_function)
+        out = ps.process(input_data)
+        self.assertEqual(out, my_function(input_data))
+
+if __name__ == '__main__':
+    unittest.main()