updated error handling to provide http status on exception

src/main/java/com/postmarkapp/postmark/client/HttpClientErrorHandler.java

@@ -25,22 +25,22 @@ public HttpClientErrorHandler(DataHandler dataHandler) {
      *
      * @throws java.io.IOException in case invalid HTTP response is returned.
      */
-    public PostmarkException throwErrorBasedOnStatusCode(Integer statusCode, String message) throws IOException {
+    public PostmarkHttpException throwErrorBasedOnStatusCode(Integer statusCode, String message) throws IOException {
         switch (statusCode) {
             case 401:
-                return new InvalidAPIKeyException(postmarkErrorFromResponse(message));
+                return new InvalidAPIKeyException(postmarkErrorFromResponse(message), statusCode);
 
             case 408:
-                return new TimeoutException(message);
+                return new TimeoutException(message, statusCode);
 
             case 422:
-                return new InvalidMessageException(postmarkErrorFromResponse(message));
+                return new InvalidMessageException(postmarkErrorFromResponse(message), statusCode);
 
             case 500:
-                return new InternalServerException(message);
+                return new InternalServerException(message, statusCode);
 
             default:
-                return new UnknownException(message);
+                return new UnknownException(message, statusCode);
 
         }
     }

src/main/java/com/postmarkapp/postmark/client/exception/InternalServerException.java

@@ -4,8 +4,8 @@
  * Group of classes that identifies main Postmark API exceptions.
  */
 
-public class InternalServerException extends PostmarkException {
-    public InternalServerException(String message) {
-        super(message);
+public class InternalServerException extends PostmarkHttpException {
+    public InternalServerException(String message, Integer statusCode) {
+        super(message, statusCode);
     }
 }

src/main/java/com/postmarkapp/postmark/client/exception/InvalidAPIKeyException.java

@@ -5,8 +5,8 @@
 /**
  * Group of classes that identifies main Postmark API exceptions.
  */
-public class InvalidAPIKeyException extends PostmarkException {
-    public InvalidAPIKeyException(PostmarkError error) {
-        super(error.getMessage(), error.getErrorCode());
+public class InvalidAPIKeyException extends PostmarkHttpException {
+    public InvalidAPIKeyException(PostmarkError error, Integer statusCode) {
+        super(error.getMessage(), error.getErrorCode(), statusCode);
     }
 }

src/main/java/com/postmarkapp/postmark/client/exception/InvalidMessageException.java

@@ -6,9 +6,9 @@
  * Group of classes that identifies main Postmark API exceptions.
  */
 
-public class InvalidMessageException extends PostmarkException {
-    public InvalidMessageException(PostmarkError error) {
-        super(error.getMessage(), error.getErrorCode());
+public class InvalidMessageException extends PostmarkHttpException {
+    public InvalidMessageException(PostmarkError error, Integer statusCode) {
+        super(error.getMessage(), error.getErrorCode(), statusCode);
     }
 }
 

src/main/java/com/postmarkapp/postmark/client/exception/PostmarkHttpException.java

@@ -0,0 +1,22 @@
+package com.postmarkapp.postmark.client.exception;
+
+import com.postmarkapp.postmark.client.data.model.PostmarkError;
+
+/**
+ * Group of classes that identifies main Postmark API exceptions.
+ */
+
+public class PostmarkHttpException extends PostmarkException {
+    private Integer statusCode;
+    public Integer getStatusCode() {
+        return statusCode;
+    }
+    public PostmarkHttpException(String message, Integer statusCode) {
+        super(message);
+        this.statusCode = statusCode;
+    }
+    public PostmarkHttpException(String message, Integer errorCode, Integer statusCode) {
+        super(message, errorCode);
+        this.statusCode = statusCode;
+    }
+}

src/main/java/com/postmarkapp/postmark/client/exception/TimeoutException.java

@@ -4,8 +4,8 @@
  * Group of classes that identifies main Postmark API exceptions.
  */
 
-public class TimeoutException extends PostmarkException {
-    public TimeoutException(String message) {
-        super(message);
+public class TimeoutException extends PostmarkHttpException {
+    public TimeoutException(String message, Integer statusCode) {
+        super(message, statusCode);
     }
 }

src/main/java/com/postmarkapp/postmark/client/exception/UnknownException.java

@@ -4,9 +4,9 @@
  * Group of classes that identifies main Postmark API exceptions.
  */
 
-public class UnknownException extends PostmarkException {
-    public UnknownException(String message) {
-        super(message);
+public class UnknownException extends PostmarkHttpException {
+    public UnknownException(String message, Integer statusCode) {
+        super(message, statusCode);
     }
 
 }

src/test/java/unit/client/HttpClientErrorHandlerTest.java

@@ -0,0 +1,80 @@
+package unit.client;
+
+import com.postmarkapp.postmark.client.HttpClientErrorHandler;
+import com.postmarkapp.postmark.client.data.parser.DataHandler;
+import com.postmarkapp.postmark.client.exception.*;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+
+
+public class HttpClientErrorHandlerTest {
+
+    String getStringHashMap() {
+
+        return "{\n" +
+                "  \"ErrorCode\" : \"10\",\n" +
+                "  \"Message\" : \"ErrorMessage\"\n" +
+                "}";
+    }
+
+    @Test
+    void throw401error() throws IOException, PostmarkException {
+        int statusCode = 401;
+        HttpClientErrorHandler errorHandler = new HttpClientErrorHandler(new DataHandler(false));
+        InvalidAPIKeyException exception = (InvalidAPIKeyException) errorHandler.throwErrorBasedOnStatusCode(statusCode, getStringHashMap());
+
+        assertEquals(exception.getErrorCode(),10);
+        assertEquals(exception.getMessage(),"ErrorMessage");
+        assertEquals(exception.getStatusCode(), statusCode);
+    }
+
+    @Test
+    void throw408error() throws IOException, PostmarkException {
+        int statusCode = 408;
+        HttpClientErrorHandler errorHandler = new HttpClientErrorHandler(new DataHandler(false));
+        TimeoutException exception = (TimeoutException) errorHandler.throwErrorBasedOnStatusCode(statusCode, "message");
+
+        assertEquals(exception.getErrorCode(),null);
+        assertEquals(exception.getMessage(),"message");
+        assertEquals(exception.getStatusCode(), statusCode);
+    }
+
+    @Test
+    void throw422error() throws IOException, PostmarkException {
+        int statusCode = 422;
+        HttpClientErrorHandler errorHandler = new HttpClientErrorHandler(new DataHandler(false));
+        InvalidMessageException exception = (InvalidMessageException) errorHandler.throwErrorBasedOnStatusCode(statusCode, getStringHashMap());
+
+        assertEquals(exception.getErrorCode(),10);
+        assertEquals(exception.getMessage(),"ErrorMessage");
+        assertEquals(exception.getStatusCode(), statusCode);
+    }
+
+    @Test
+    void throw500error() throws IOException, PostmarkException {
+        int statusCode = 500;
+        HttpClientErrorHandler errorHandler = new HttpClientErrorHandler(new DataHandler(false));
+        InternalServerException exception = (InternalServerException) errorHandler.throwErrorBasedOnStatusCode(statusCode, "message");
+
+        assertEquals(exception.getErrorCode(),null);
+        assertEquals(exception.getMessage(),"message");
+        assertEquals(exception.getStatusCode(), statusCode);
+    }
+
+    @Test
+    void throw501error() throws IOException, PostmarkException {
+        int statusCode = 501;
+        HttpClientErrorHandler errorHandler = new HttpClientErrorHandler(new DataHandler(false));
+        UnknownException exception = (UnknownException) errorHandler.throwErrorBasedOnStatusCode(statusCode, "message");
+
+        assertEquals(exception.getErrorCode(),null);
+        assertEquals(exception.getMessage(),"message");
+        assertEquals(exception.getStatusCode(), statusCode);
+    }
+
+}