Add support for specifying mutability when parsing a configuration

tests/json/test_json.py

@@ -15,6 +15,7 @@
 from src.jcloud_config_parser.json import JSONConfiguration
 from src.jcloud_config_parser.exceptions import JSONObjectSyntaxError, JSONValueSyntaxError, JSONStringSyntaxError, JSONArraySyntaxError, EscapeSequenceSyntaxError
 from src.jcloud_config_parser import set_mutability
+from src.jcloud_config_parser.parse.json import JSONString
 
 def test_json_configuration():
     # Test valid JSON configuration parsing
@@ -224,7 +225,7 @@ def test_json_configuration():
         pass
 
 def test_mutability():
-    config = JSONConfiguration(mutable=False)
+    config = JSONConfiguration(mutable = False)
     try:
         config.key = 'value'
         assert False, 'Expected TypeError'
@@ -243,4 +244,27 @@ def test_mutability():
         del config.key
         assert False, 'Expected TypeError'
     except TypeError:
-        pass
+        pass
+
+    configuration = '{"key": "value"}'
+    config = JSONConfiguration.from_string(configuration)
+    config.key1 = JSONString("value1")
+    
+    set_mutability(config, False)
+
+    try:
+        config.key2 = JSONString('value2')
+        assert False, 'Expected TypeError'
+    except TypeError:
+        pass
+
+    config = JSONConfiguration.from_string(configuration, mutable = False)
+
+    try:
+        config.key1 = JSONString('value1')
+        assert False, 'Expected TypeError'
+    except TypeError:
+        pass
+
+    set_mutability(config, True)
+    config.key2 = JSONString('value2')