fix(events): imported EventBus does not correctly register source acc…

…ount (#13481)

Parses the event bus arn to give the account and region to the underlying Resource.

fixes #13469


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-events/lib/event-bus.ts

@@ -282,7 +282,11 @@ class ImportedEventBus extends EventBusBase {
  public readonly eventBusPolicy: string;
  public readonly eventSourceName?: string;
  constructor(scope: Construct, id: string, attrs: EventBusAttributes) {
- super(scope, id);
+ const arnParts = Stack.of(scope).parseArn(attrs.eventBusArn);
+ super(scope, id, {
+ account: arnParts.account,
+ region: arnParts.region,
+ });
 
  this.eventBusArn = attrs.eventBusArn;
  this.eventBusName = attrs.eventBusName;

packages/@aws-cdk/aws-events/test/test.event-bus.ts

@@ -1,6 +1,6 @@
 import { expect, haveResource } from '@aws-cdk/assert';
 import * as iam from '@aws-cdk/aws-iam';
-import { Aws, CfnResource, Stack } from '@aws-cdk/core';
+import { Aws, CfnResource, Stack, Arn } from '@aws-cdk/core';
 import { Test } from 'nodeunit';
 import { EventBus } from '../lib';
 
@@ -55,6 +55,65 @@ export = {
  test.done();
  },
 
+ 'imported event bus'(test: Test) {
+ const stack = new Stack();
+
+ const eventBus = new EventBus(stack, 'Bus');
+
+ const importEB = EventBus.fromEventBusArn(stack, 'ImportBus', eventBus.eventBusArn);
+
+ // WHEN
+ new CfnResource(stack, 'Res', {
+ type: 'Test::Resource',
+ properties: {
+ EventBusArn1: eventBus.eventBusArn,
+ EventBusArn2: importEB.eventBusArn,
+ },
+ });
+
+ expect(stack).to(haveResource('Test::Resource', {
+ EventBusArn1: { 'Fn::GetAtt': ['BusEA82B648', 'Arn'] },
+ EventBusArn2: { 'Fn::GetAtt': ['BusEA82B648', 'Arn'] },
+ }));
+
+ test.done();
+ },
+
+ 'same account imported event bus has right resource env'(test: Test) {
+ const stack = new Stack();
+
+ const eventBus = new EventBus(stack, 'Bus');
+
+ const importEB = EventBus.fromEventBusArn(stack, 'ImportBus', eventBus.eventBusArn);
+
+ // WHEN
+ test.deepEqual(stack.resolve(importEB.env.account), { 'Fn::Select': [4, { 'Fn::Split': [':', { 'Fn::GetAtt': ['BusEA82B648', 'Arn'] }] }] });
+ test.deepEqual(stack.resolve(importEB.env.region), { 'Fn::Select': [3, { 'Fn::Split': [':', { 'Fn::GetAtt': ['BusEA82B648', 'Arn'] }] }] });
+
+ test.done();
+ },
+
+ 'cross account imported event bus has right resource env'(test: Test) {
+ const stack = new Stack();
+
+ const arnParts = {
+ resource: 'bus',
+ service: 'events',
+ account: 'myAccount',
+ region: 'us-west-1',
+ };
+
+ const arn = Arn.format(arnParts, stack);
+
+ const importEB = EventBus.fromEventBusArn(stack, 'ImportBus', arn);
+
+ // WHEN
+ test.deepEqual(importEB.env.account, arnParts.account);
+ test.deepEqual(importEB.env.region, arnParts.region);
+
+ test.done();
+ },
+
  'can get bus name'(test: Test) {
  // GIVEN
  const stack = new Stack();