add additional initialization tests

Author: ibalosh

src/test/java/base/BaseTest.java

@@ -58,6 +58,10 @@ public ApiClient getDefaultApiClient() {
         return Postmark.getApiClient(defaultApiToken);
     }
 
+    public ApiClient getDefaultApiClientCustomUrl() {
+        return Postmark.getApiClient(defaultApiToken, true, Postmark.DEFAULTS.API_URL.value);
+    }
+
     public AccountApiClient getDefaultAccountApiClient() {
         return Postmark.getAccountApiClient(defaultAccountToken);
     }

src/test/java/integration/BounceTest.java

@@ -24,7 +24,7 @@
  */
 public class BounceTest extends BaseTest {
 
-    ApiClient client = getDefaultApiClient();
+    ApiClient client = getDefaultApiClientCustomUrl();
 
     @Test
     void deliveryStats() throws PostmarkException, IOException {

src/test/java/unit/PostmarkTest.java

@@ -2,6 +2,11 @@
 
 import base.BaseTest;
 import com.wildbit.java.postmark.Postmark;
+import com.wildbit.java.postmark.client.AccountApiClient;
+import com.wildbit.java.postmark.client.ApiClient;
+import com.wildbit.java.postmark.client.Parameters;
+import com.wildbit.java.postmark.client.data.model.bounces.Bounces;
+import com.wildbit.java.postmark.client.exception.PostmarkException;
 import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
@@ -27,6 +32,18 @@ void getApiClientSecure() {
         assertNotNull(Postmark.getApiClient(apiToken, true));
     }
 
+    @Test
+    void getApiClientCustomBaseUrl() throws IOException, PostmarkException {
+        ApiClient client = Postmark.getApiClient(apiToken, true, "example.com");
+        assertEquals(client.getBaseUrl(), "example.com");
+    }
+
+    @Test
+    void getApiClientCustomUrl() throws IOException, PostmarkException {
+        ApiClient client = Postmark.getApiClient(apiToken, true, "example.com");
+        assertEquals(client.getEndpointUrl("/test"), "example.com/test");
+    }
+
     @Test
     void getAccountApiClient() {
         assertNotNull(Postmark.getAccountApiClient(apiToken));
@@ -36,4 +53,16 @@ void getAccountApiClient() {
     void getAccountApiClientSecure() {
         assertNotNull(Postmark.getAccountApiClient(apiToken,true));
     }
+
+    @Test
+    void getAccountApiClientCustomBaseUrl() throws IOException, PostmarkException {
+        AccountApiClient client = Postmark.getAccountApiClient(apiToken, true, "example.com");
+        assertEquals(client.getBaseUrl(), "example.com");
+    }
+
+    @Test
+    void getAccountApiClientCustomUrl()throws IOException, PostmarkException {
+        AccountApiClient client = Postmark.getAccountApiClient(apiToken, true, "example.com");
+        assertEquals(client.getEndpointUrl("/test"), "example.com/test");
+    }
 }