1 files changed, 100 insertions, 0 deletions
diff --git a/gson/src/test/java/org/onap/policy/common/gson/internal/MethodDeserializerTest.java b/gson/src/test/java/org/onap/policy/common/gson/internal/MethodDeserializerTest.java
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+/*
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.common.gson.internal;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonNull;
+import com.google.gson.JsonObject;
+import java.util.List;
+import org.junit.Test;
+import org.onap.policy.common.gson.JacksonExclusionStrategy;
+import org.onap.policy.common.gson.internal.DataAdapterFactory.Data;
+import org.onap.policy.common.gson.internal.MethodDeserializer;
+
+public class MethodDeserializerTest {
+    private static final String PROP_NAME = "text";
+    private static final String METHOD_NAME = "setText";
+    private static final String INITIAL_VALUE = "initial value";
+    private static final String NEW_VALUE = "new value";
+
+    private static DataAdapterFactory dataAdapter = new DataAdapterFactory();
+
+    private static Gson gson = new GsonBuilder().registerTypeAdapterFactory(dataAdapter)
+                    .setExclusionStrategies(new JacksonExclusionStrategy()).create();
+
+    private MethodDeserializer deser;
+
+    private String text;
+
+    private List<Data> listField;
+
+    @Test
+    public void testGetFromTree() throws Exception {
+        deser = new MethodDeserializer(gson, MethodDeserializerTest.class.getDeclaredMethod(METHOD_NAME, String.class));
+
+        // non-existent value - should not overwrite
+        text = INITIAL_VALUE;
+        JsonObject json = new JsonObject();
+        deser.getFromTree(json, this);
+        assertEquals(INITIAL_VALUE, text);
+
+        // null value - should not overwrite
+        text = INITIAL_VALUE;
+        json.add(PROP_NAME, JsonNull.INSTANCE);
+        deser.getFromTree(json, this);
+        assertEquals(INITIAL_VALUE, text);
+
+        // has a value - should store it
+        text = INITIAL_VALUE;
+        json.addProperty(PROP_NAME, NEW_VALUE);
+        deser.getFromTree(json, this);
+        assertEquals(NEW_VALUE, text);
+
+        /*
+         * check list field
+         */
+        deser = new MethodDeserializer(gson, MethodDeserializerTest.class.getDeclaredMethod("setTheList", List.class));
+
+        json = new JsonObject();
+        json.add("theList", DataAdapterFactory.makeArray());
+
+        dataAdapter.reset();
+        listField = null;
+        deser.getFromTree(json, this);
+
+        assertTrue(dataAdapter.isDataRead());
+        assertNotNull(listField);
+        assertEquals(DataAdapterFactory.makeList().toString(), listField.toString());
+    }
+
+    protected void setText(String text) {
+        this.text = text;
+    }
+
+    protected void setTheList(List<Data> lst) {
+        listField = lst;
+    }
+}