diff options
Diffstat (limited to 'gson/src/test/java/org/onap/policy/common/gson/internal/FieldDeserializerTest.java')
-rw-r--r-- | gson/src/test/java/org/onap/policy/common/gson/internal/FieldDeserializerTest.java | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/gson/src/test/java/org/onap/policy/common/gson/internal/FieldDeserializerTest.java b/gson/src/test/java/org/onap/policy/common/gson/internal/FieldDeserializerTest.java new file mode 100644 index 00000000..62bab231 --- /dev/null +++ b/gson/src/test/java/org/onap/policy/common/gson/internal/FieldDeserializerTest.java @@ -0,0 +1,109 @@ +/* + * ============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.assertj.core.api.Assertions.assertThatThrownBy; +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.assertTrue; + +import com.google.gson.Gson; +import com.google.gson.GsonBuilder; +import com.google.gson.JsonElement; +import com.google.gson.JsonNull; +import com.google.gson.JsonObject; +import com.google.gson.JsonParseException; +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.FieldDeserializer; + +public class FieldDeserializerTest { + private static final String TEXT_FIELD_NAME = "text"; + private static final String LIST_FIELD_NAME = "listField"; + 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 FieldDeserializer deser; + + private String text; + + private List<Data> listField; + + @Test + public void testGetFromTree() throws Exception { + deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(TEXT_FIELD_NAME)); + + JsonObject json = new JsonObject(); + + // no value in tree - text remains unchanged + text = INITIAL_VALUE; + deser.getFromTree(json, this); + assertEquals(text, INITIAL_VALUE); + + // null value in tree - text remains unchanged + json.add(TEXT_FIELD_NAME, JsonNull.INSTANCE); + deser.getFromTree(json, this); + assertEquals(text, INITIAL_VALUE); + + // now assign a value - text should be changed now + json.addProperty(TEXT_FIELD_NAME, NEW_VALUE); + + deser.getFromTree(json, this); + assertEquals(text, NEW_VALUE); + + /* + * check list field + */ + deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(LIST_FIELD_NAME)); + + json.add(LIST_FIELD_NAME, DataAdapterFactory.makeArray()); + + dataAdapter.reset(); + listField = null; + deser.getFromTree(json, this); + + assertTrue(dataAdapter.isDataRead()); + assertEquals(DataAdapterFactory.makeList().toString(), listField.toString()); + } + + @Test + public void testGetFromTree_SetEx() throws Exception { + deser = new FieldDeserializer(gson, FieldDeserializerTest.class.getDeclaredField(TEXT_FIELD_NAME)) { + @Override + public Object fromJsonTree(JsonElement tree) { + // return an int, which won't fit in a String - cause an exception + return 10; + } + }; + + JsonObject json = new JsonObject(); + json.addProperty(TEXT_FIELD_NAME, NEW_VALUE); + + assertThatThrownBy(() -> deser.getFromTree(json, this)).isInstanceOf(JsonParseException.class) + .hasMessage(FieldDeserializer.SET_ERR + FieldDeserializerTest.class.getName() + ".text"); + } +} |