Fix test case

Author: tylerlong

.travis.yml

@@ -1,5 +1,4 @@
 language: java
 
 jdk:
-    - openjdk8
-    - openjdk12
+    - openjdk14

src/test/java/com/ringcentral/DictionaryTest.java

@@ -2,12 +2,11 @@
 
 import com.ringcentral.definitions.GetCountryInfoDictionaryResponse;
 import com.ringcentral.definitions.GetCountryListResponse;
+import org.junit.Assert;
 import org.junit.Test;
 
 import java.io.IOException;
 
-import static org.junit.Assert.assertTrue;
-
 public class DictionaryTest {
     @Test
     public void testGetCountry() throws IOException, RestException {
@@ -24,7 +23,7 @@ public void testGetCountry() throws IOException, RestException {
         );
 
         GetCountryInfoDictionaryResponse c = rc.restapi().dictionary().country("46").get();
-        assertEquals("China", c.name);
+        Assert.assertEquals("China", c.name);
 
         rc.revoke();
     }
@@ -44,7 +43,7 @@ public void testListCountry() throws IOException, RestException {
         );
 
         GetCountryListResponse r = rc.restapi().dictionary().country().list();
-        assertTrue(r.records.length > 0);
+        Assert.assertTrue(r.records.length > 0);
 
         rc.revoke();
     }

src/test/java/com/ringcentral/IVRContentTest.java

@@ -6,14 +6,13 @@
 import com.ringcentral.definitions.PromptInfo;
 import okhttp3.Request;
 import okhttp3.Response;
+import org.junit.Assert;
 import org.junit.Test;
 
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Paths;
 
-import static org.junit.Assert.assertNotNull;
-
 public class IVRContentTest {
     @Test
     public void downloadIVRPromptContent() throws IOException, RestException {
@@ -31,8 +30,8 @@ public void downloadIVRPromptContent() throws IOException, RestException {
 
         IVRPrompts ivrPrompts = rc.restapi().account().ivrprompts().list();
         PromptInfo promptInfo = rc.restapi().account().ivrprompts(ivrPrompts.records[0].id).get();
-        assertNotNull(promptInfo.id);
-        assertEquals(promptInfo.id, ivrPrompts.records[0].id);
+        Assert.assertNotNull(promptInfo.id);
+        Assert.assertEquals(promptInfo.id, ivrPrompts.records[0].id);
 
 //        ResponseBody responseBody = rc.get("/restapi/v1.0/account/~/ivr-prompts/"+ promptInfo.id + "/content");
 //        byte[] bytes = responseBody.bytes();
@@ -95,7 +94,7 @@ public void afterHttpCall(Response response, Request request) {
 
         IVRPrompts ivrPrompts = rc.restapi().account().ivrprompts().list();
         PromptInfo promptInfo = rc.restapi().account().ivrprompts(ivrPrompts.records[0].id).get();
-        assertNotNull(promptInfo.id);
+        Assert.assertNotNull(promptInfo.id);
 
 //        PromptInfo promptInfo = rc.restapi().account().ivrprompts().put(new CreateIvrPromptRequest()
 //            .name("Uploaded via API")