Add a test to make sure the webhook payload is correct

This uses the responses library to intercept the request so we can
confirm that the body content is exactly as expected.

tests/test_resources.py

@@ -28,14 +28,19 @@
 #
 # =================================================================
 
+import json
 import unittest
 import os
 
+import responses
+from responses.matchers import urlencoded_params_matcher
+
 from init import App
 from models import (DB, Resource, Run, load_data, Recipient)
 from healthcheck import run_test_resource
-from notifications import _parse_webhook_location
+from notifications import _parse_webhook_location, do_webhook
 from resourceauth import ResourceAuth
+import result
 
 TEST_DIR = os.path.dirname(os.path.abspath(__file__))
 
@@ -133,6 +138,66 @@ def testWebhookNotifications(self):
             except Exception as err:
                 self.assertFalse(success, str(err))
 
+    @responses.activate
+    def testWebhookPayload(self):
+
+        # create a report from scratch as as local fixture for
+
+        recipient = Recipient.query.filter(Recipient.channel==Recipient.TYPE_WEBHOOK).first()
+
+        resource = recipient.resources[0]
+
+        resource_result = result.ResourceResult(resource)
+        resource_result.start()
+
+        probe = resource.probe_vars[0]
+        probe_result = result.ProbeResult(None, probe)
+        probe_result.start()
+
+        check = probe.check_vars[0]
+        check_result = result.CheckResult(
+            check=None,
+            check_vars=check,
+            success=False,
+            message='Failed'
+        )
+        check_result.start()
+        check_result.stop()
+
+        probe_result.add_result(check_result)
+        probe_result.stop()
+
+        resource_result.add_result(probe_result)
+        resource_result.stop()
+
+        run = Run(resource=resource, result=resource_result)
+
+        # Build up the expected payload being sent ot the webhook
+
+        expected_payload = {
+            'ghc.result': 'Broken',
+            'ghc.resource.url': resource.url,
+            'ghc.resource.title': resource.title,
+            'ghc.resource.type': resource.resource_type,
+            'ghc.resource.view': f'http://host/resource/{resource.identifier}',
+            'ghc.run.message': 'Failed',
+            'ghc.run.report': json.dumps(resource_result.get_report(), sort_keys=True),
+        }
+
+        responses.add(
+            method=responses.POST,
+            url='https://localhost/webhook',
+            match=[urlencoded_params_matcher(expected_payload)]
+        )
+
+        do_webhook(
+            config=App.get_config(),
+            resource=resource,
+            run=run,
+            status_changed=None,  # unused in do_webhook
+            result='Broken'
+        )
+
     def testSetGetResoureAuth(self):
         # Test set/get auth for any Resource, tests en/decrypt
         resource = Resource.query.first()