webhook tests: Avoid check_webhook for multi messages.

If we're not passing in expected_topic or expected_message
to check_webhook, it's better to just call send_webhook_payload,
since we'll want to explicitly check our messages
anyway.

This preps us to always require those fields for
check_webhook, which can prevent insidious testing no-ops.

zerver/webhooks/bitbucket2/tests.py

@@ -272,7 +272,17 @@ class Bitbucket2HookTests(WebhookTestCase):
         kwargs = {
             "HTTP_X_EVENT_KEY": 'pullrequest:push',
         }
-        self.check_webhook("push_more_than_one_tag", **kwargs)
+
+        self.subscribe(self.test_user, self.STREAM_NAME)
+        payload = self.get_body("push_more_than_one_tag")
+
+        msg = self.send_webhook_payload(
+            self.test_user,
+            self.url,
+            payload,
+            content_type="application/json",
+            **kwargs,
+        )
 
         msg = self.get_second_to_last_message()
         self.assert_stream_message(
@@ -294,7 +304,17 @@ class Bitbucket2HookTests(WebhookTestCase):
         kwargs = {
             "HTTP_X_EVENT_KEY": 'pullrequest:push',
         }
-        self.check_webhook("more_than_one_push_event", **kwargs)
+
+        self.subscribe(self.test_user, self.STREAM_NAME)
+        payload = self.get_body("more_than_one_push_event")
+
+        msg = self.send_webhook_payload(
+            self.test_user,
+            self.url,
+            payload,
+            content_type="application/json",
+            **kwargs,
+        )
 
         msg = self.get_second_to_last_message()
         self.assert_stream_message(
@@ -317,7 +337,17 @@ class Bitbucket2HookTests(WebhookTestCase):
         kwargs = {
             "HTTP_X_EVENT_KEY": 'pullrequest:push',
         }
-        self.check_webhook("more_than_one_push_event", **kwargs)
+
+        self.subscribe(self.test_user, self.STREAM_NAME)
+        payload = self.get_body("more_than_one_push_event")
+
+        msg = self.send_webhook_payload(
+            self.test_user,
+            self.url,
+            payload,
+            content_type="application/json",
+            **kwargs,
+        )
 
         msg = self.get_second_to_last_message()
         self.assert_stream_message(

zerver/webhooks/bitbucket3/tests.py

@@ -68,7 +68,15 @@ class Bitbucket3HookTests(WebhookTestCase):
         branch1_content = """[hypro999](http://139.59.64.214:7990/users/hypro999) pushed to branch branch1. Head is now 3980c2be32a7e23c795741d5dc1a2eecb9b85d6d."""
         master_content = """[hypro999](http://139.59.64.214:7990/users/hypro999) pushed to branch master. Head is now fc43d13cff1abb28631196944ba4fc4ad06a2cf2."""
 
-        self.check_webhook("repo_push_update_multiple_branches")
+        self.subscribe(self.test_user, self.STREAM_NAME)
+        payload = self.get_body("repo_push_update_multiple_branches")
+
+        msg = self.send_webhook_payload(
+            self.test_user,
+            self.url,
+            payload,
+            content_type="application/json",
+        )
 
         msg = self.get_second_to_last_message()
         self.assert_stream_message(

zerver/webhooks/updown/tests.py

@@ -27,7 +27,15 @@ class UpdownHookTests(WebhookTestCase):
         down_content = "Service is `down`. It returned a 500 error at 2016-02-07 13:11:43 UTC."
         up_content = "Service is `up` again after 1 second."
 
-        self.check_webhook("check_multiple_events")
+        self.subscribe(self.test_user, self.STREAM_NAME)
+        payload = self.get_body("check_multiple_events")
+
+        msg = self.send_webhook_payload(
+            self.test_user,
+            self.url,
+            payload,
+            content_type="application/json",
+        )
 
         msg = self.get_second_to_last_message()
         self.assert_stream_message(