added the first test as part of #10

Author: germanattanasio

src/test/java/com/ibm/watson/developer_cloud/tradeoff_analytics/v1/ProblemTest.java

@@ -0,0 +1,47 @@
+/**
+ * Copyright 2015 IBM Corp. 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.
+ */
+package com.ibm.watson.developer_cloud.tradeoff_analytics.v1;
+
+import java.io.InputStream;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.ibm.watson.developer_cloud.WatsonServiceTest;
+import com.ibm.watson.developer_cloud.tradeoff_analytics.v1.model.Problem;
+import com.ibm.watson.developer_cloud.util.GsonSingleton;
+
+/**
+ * The Class TradeoffAnalyticsTest.
+ */
+public class ProblemTest {
+
+	/**
+	 * Test convert problem to json and vise versa
+	 */
+	@Test
+	public void testJsonProblem() {
+		InputStream in = this.getClass().getClassLoader().getResourceAsStream("problem.json");
+		String problemJson = WatsonServiceTest.getStringFromInputStream(in);
+		Problem problem = GsonSingleton.getGson().fromJson(problemJson, Problem.class);
+		Assert.assertNotNull(problem.getSubject());
+		Assert.assertNotNull(problem.getColumns());
+		Assert.assertNotNull(problem.getOptions());
+		Assert.assertNotNull(problem.getColumns().get(0));
+		Assert.assertNotNull(problem.getOptions().get(0));
+	}
+
+}