From 1d615e25b651937f236fc4366f9bfe90063cd349 Mon Sep 17 00:00:00 2001
From: gruebel <anton.gruebel@gmail.com>
Date: Mon, 4 Nov 2019 21:31:04 +0100
Subject: [PATCH] Add events.delete_event_bus

---
 IMPLEMENTATION_COVERAGE.md       |  4 ++--
 moto/events/models.py            |  8 +++++++
 moto/events/responses.py         |  7 +++++++
 tests/test_events/test_events.py | 36 +++++++++++++++++++++++++++++++-
 4 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/IMPLEMENTATION_COVERAGE.md b/IMPLEMENTATION_COVERAGE.md
index 6c1cb503b..66c269f8d 100644
--- a/IMPLEMENTATION_COVERAGE.md
+++ b/IMPLEMENTATION_COVERAGE.md
@@ -2713,12 +2713,12 @@
 - [ ] upgrade_elasticsearch_domain
 
 ## events
-54% implemented
+58% implemented
 - [ ] activate_event_source
 - [X] create_event_bus
 - [ ] create_partner_event_source
 - [ ] deactivate_event_source
-- [ ] delete_event_bus
+- [X] delete_event_bus
 - [ ] delete_partner_event_source
 - [X] delete_rule
 - [X] describe_event_bus
diff --git a/moto/events/models.py b/moto/events/models.py
index 4e9ba0da2..be4153b9f 100644
--- a/moto/events/models.py
+++ b/moto/events/models.py
@@ -354,6 +354,14 @@ class EventsBackend(BaseBackend):
 
         return list(self.event_buses.values())
 
+    def delete_event_bus(self, name):
+        if name == "default":
+            raise JsonRESTError(
+                "ValidationException", "Cannot delete event bus default."
+            )
+
+        self.event_buses.pop(name, None)
+
 
 available_regions = boto3.session.Session().get_available_regions("events")
 events_backends = {region: EventsBackend(region) for region in available_regions}
diff --git a/moto/events/responses.py b/moto/events/responses.py
index dc1615b3c..98a33218a 100644
--- a/moto/events/responses.py
+++ b/moto/events/responses.py
@@ -296,3 +296,10 @@ class EventsHandler(BaseResponse):
             response.append(event_bus_response)
 
         return json.dumps({"EventBuses": response}), self.response_headers
+
+    def delete_event_bus(self):
+        name = self._get_param("Name")
+
+        self.events_backend.delete_event_bus(name)
+
+        return "", self.response_headers
diff --git a/tests/test_events/test_events.py b/tests/test_events/test_events.py
index 5a2cb4f5d..506d66c07 100644
--- a/tests/test_events/test_events.py
+++ b/tests/test_events/test_events.py
@@ -283,7 +283,7 @@ def test_create_event_bus():
 @mock_events
 def test_create_event_bus_errors():
     client = boto3.client("events", "us-east-1")
-    response = client.create_event_bus(Name="test-bus")
+    client.create_event_bus(Name="test-bus")
 
     client.create_event_bus.when.called_with(Name="test-bus").should.throw(
         ClientError, "Event bus test-bus already exists."
@@ -415,3 +415,37 @@ def test_list_event_buses():
             },
         ]
     )
+
+
+@mock_events
+def test_delete_event_bus():
+    client = boto3.client("events", "us-east-1")
+    client.create_event_bus(Name="test-bus")
+
+    response = client.list_event_buses()
+    response["EventBuses"].should.have.length_of(2)
+
+    client.delete_event_bus(Name="test-bus")
+
+    response = client.list_event_buses()
+    response["EventBuses"].should.have.length_of(1)
+    response["EventBuses"].should.equal(
+        [
+            {
+                "Name": "default",
+                "Arn": "arn:aws:events:us-east-1:123456789012:event-bus/default",
+            }
+        ]
+    )
+
+    # deleting non existing event bus should be successful
+    client.delete_event_bus(Name="non-existing")
+
+
+@mock_events
+def test_delete_event_bus_errors():
+    client = boto3.client("events", "us-east-1")
+
+    client.delete_event_bus.when.called_with(Name="default").should.throw(
+        ClientError, "Cannot delete event bus default."
+    )