fix parsing of null (#184)

Author: kkozik-amplify

hcl2/transformer.py

@@ -343,6 +343,8 @@ def to_tf_inline(self, value: Any) -> str:
             return value
         if isinstance(value, int):
             return str(value)
+        if value is None:
+            return "None"
 
         raise RuntimeError(f"Invalid type to convert to inline HCL: {type(value)}")
 

test/unit/test_hcl2_syntax.py

@@ -164,3 +164,11 @@ def test_e_notation(self):
         for actual, expected in literals.items():
             result = self.load_to_dict(actual)
             self.assertDictEqual(result, expected)
+
+    def test_null(self):
+        identifier = "var = null"
+
+        expected = {"var": None}
+
+        result = self.load_to_dict(identifier)
+        self.assertDictEqual(result, expected)