tests: test a custom JsonDeserializer::class_name_heuristic

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/tests/sav/test_json_deserialization_heuristic.res b/tests/sav/test_json_deserialization_heuristic.res
new file mode 100644 (file)
index 0000000..6ab6917
--- /dev/null
+++ b/tests/sav/test_json_deserialization_heuristic.res
@@ -0,0 +1,9 @@
+# JSON: {"__class": "MyData", "data": "some data"}
+# Nit: <MyData some data>
+
+# JSON: {"data": "some other data"}
+# Nit: <MyData some other data>
+
+# JSON: {"error": "some error message"}
+# Nit: <MyError some error message>
+

diff --git a/tests/test_json_deserialization_heuristic.nit b/tests/test_json_deserialization_heuristic.nit
new file mode 100644 (file)
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+++ b/tests/test_json_deserialization_heuristic.nit
@@ -0,0 +1,64 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import json::serialization
+import json::static
+
+class MyData
+       serialize
+
+       var data: String
+
+       redef fun to_s do return "<MyData {data}>"
+end
+
+class MyError
+       serialize
+
+       var error: String
+
+       redef fun to_s do return "<MyError {error}>"
+end
+
+class MyJsonDeserializer
+       super JsonDeserializer
+
+       redef fun class_name_heuristic(json_object)
+       do
+               if json_object.keys.has("error") then return "MyError"
+               if json_object.keys.has("data") then return "MyData"
+               return null
+       end
+end
+
+var tests = new Array[String]
+
+# Object with meta data, does not need the heuristic
+tests.add """
+{"__class": "MyData", "data": "some data"}"""
+
+# Objects without meta data
+tests.add """
+{"data": "some other data"}"""
+tests.add """
+{"error": "some error message"}"""
+
+for o in tests do
+       var deserializer = new MyJsonDeserializer(o)
+       var deserialized = deserializer.deserialize
+
+       print "# JSON: {o}"
+       if deserializer.errors.not_empty then print "# Errors: '{deserializer.errors.join("', '")}'"
+       print "# Nit: {deserialized or else "null"}\n"
+end