Provide easy way to override BASE_URL to allow functional application testing

src/main/java/com/plivo/api/Plivo.java

@@ -8,10 +8,18 @@ public class Plivo {
    * Initializes the global {@link PlivoClient} instance
    */
   public static synchronized PlivoClient init(String authId, String authToken) {
-    instance = new PlivoClient(authId, authToken);
+    return init(authId, authToken, PlivoClient.BASE_URL);
+  }
+
+  /**
+   * Initializes the global {@link PlivoClient} instance
+   */
+  public static synchronized PlivoClient init(String authId, String authToken, String baseUrl) {
+    instance = new PlivoClient(authId, authToken, baseUrl);
     return instance;
   }
 
+
   /**
    * Initializes the global {@link PlivoClient} instance, taking the authId and authToken from
    * environment variables called PLIVO_AUTH_ID and PLIVO_AUTH_TOKEN.

src/main/java/com/plivo/api/PlivoClient.java

@@ -100,7 +100,18 @@ public void serialize(Enum value, JsonGenerator gen, SerializerProvider provider
   private PlivoAPIService apiService = null;
 
   public PlivoClient(String authId, String authToken) {
-    this(authId, authToken, new Builder());
+    this(authId, authToken, BASE_URL, new Builder());
+  }
+
+  public PlivoClient(String authId, String authToken, String baseUrl) {
+    this(authId, authToken, baseUrl, new Builder());
+  }
+
+  /**
+  * Constructor left for backward compatibility
+  */
+  public PlivoClient(String authId, String authToken, OkHttpClient.Builder httpClientBuilder) {
+    this(authId, authToken, BASE_URL, httpClientBuilder);
   }
 
   /**
@@ -117,7 +128,7 @@ public PlivoClient(String authId, String authToken) {
    * @param authToken
    * @param httpClientBuilder
    */
-  public PlivoClient(String authId, String authToken, OkHttpClient.Builder httpClientBuilder) {
+  public PlivoClient(String authId, String authToken, String baseUrl, OkHttpClient.Builder httpClientBuilder) {
     if (!(Utils.isAccountIdValid(authId) || Utils.isSubaccountIdValid(authId))) {
       throw new IllegalArgumentException("invalid account ID");
     }
@@ -159,7 +170,7 @@ public PlivoClient(String authId, String authToken, OkHttpClient.Builder httpCli
 
      retrofit = new Retrofit.Builder()
       .client(httpClient)
-      .baseUrl(BASE_URL)
+      .baseUrl(baseUrl)
       .addConverterFactory(JacksonConverterFactory.create(objectMapper))
       .build();
 

src/main/java/com/plivo/api/models/call/actions/CallRecordCreator.java

@@ -3,6 +3,7 @@
 import com.plivo.api.PlivoClient;
 import com.plivo.api.exceptions.PlivoRestException;
 import com.plivo.api.models.base.Creator;
+
 import java.io.IOException;
 
 public class CallRecordCreator extends Creator<CallRecordCreateResponse> {

src/main/java/com/plivo/api/models/conference/ConferenceRecordCreator.java

@@ -4,9 +4,10 @@
 import com.plivo.api.PlivoClient;
 import com.plivo.api.exceptions.PlivoRestException;
 import com.plivo.api.models.base.Creator;
-import java.io.IOException;
 import retrofit2.Call;
 
+import java.io.IOException;
+
 public class ConferenceRecordCreator extends Creator<ConferenceRecordCreateResponse> {
 
   @JsonIgnore

src/test/java/com/plivo/api/BaseTest.java

@@ -78,7 +78,6 @@ protected void assertRequest(String method, String format, Map<String, String> p
   public void setUp() throws Exception {
     server = new MockWebServer();
     server.start();
-
     PlivoClient.BASE_URL = server.url("/").toString();
     Plivo.init(authId, authToken);
     Plivo.getClient().setTesting(true);

src/test/java/com/plivo/api/CallTest.java

@@ -1,18 +1,15 @@
 package com.plivo.api;
 
-import static junit.framework.TestCase.assertEquals;
-
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.plivo.api.models.call.Call;
 import com.plivo.api.models.call.LiveCall;
 import com.squareup.okhttp.mockwebserver.RecordedRequest;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-import java.util.Map;
 import org.junit.Test;
 
+import java.util.*;
+
+import static junit.framework.TestCase.assertEquals;
+
 public class CallTest extends BaseTest {
 
   final ObjectMapper objectMapper = new ObjectMapper();