Ensure getRawJsonObject returns data for constructed webhooks (#1946)

* construct fake response during webhook parsing

* formatting

src/main/java/com/stripe/net/Webhook.java

@@ -9,6 +9,7 @@
 import java.security.NoSuchAlgorithmException;
 import java.time.Clock;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import javax.crypto.Mac;
 import javax.crypto.spec.SecretKeySpec;
@@ -72,6 +73,13 @@ public static Event constructEvent(
         StripeObject.deserializeStripeObject(
             payload, Event.class, ApiResource.getGlobalResponseGetter());
     Signature.verifyHeader(payload, sigHeader, secret, tolerance, clock);
+    // StripeObjects source their raw JSON object from their last response, but constructed webhooks
+    // don't have that
+    // in order to make the raw object available on parsed events, we fake the response.
+    if (event.getLastResponse() == null) {
+      event.setLastResponse(
+          new StripeResponse(200, HttpHeaders.of(Collections.emptyMap()), payload));
+    }
 
     return event;
   }

src/test/java/com/stripe/net/WebhookTest.java

@@ -1,5 +1,6 @@
 package com.stripe.net;
 
+import static org.junit.Assert.assertNotNull;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 import static org.junit.jupiter.api.Assertions.assertTrue;
@@ -325,4 +326,13 @@ public void testStripeClientConstructEventWithTolerance()
 
     Mockito.verify(responseGetter).request(Mockito.any(), Mockito.any());
   }
+
+  @Test
+  public void testConstructEventWithRawJson()
+      throws StripeException, NoSuchAlgorithmException, InvalidKeyException {
+
+    final Event event = Webhook.constructEvent(payload, generateSigHeader(), secret);
+
+    assertNotNull(event.getRawJsonObject());
+  }
 }