AmqpConnection: Propagate assertExchange promise

Failures were being ignored.

bin/delta-processor.ts

@@ -18,6 +18,7 @@
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+import * as amqplib from "amqplib";
 import { createAmqpConfig } from '../src/system/AmqpPublisher';
 import { MongoDeltaDao } from '../src/system/db/MongoDeltaDao';
 import { DeltaProcessor } from '../src/system/DeltaProcessor';
@@ -48,7 +49,7 @@ const process_interval_ms = +( process.env.process_interval_ms || 2000 );
 const env                 = process.env.NODE_ENV || 'Unknown Environment';
 const emitter             = new EventEmitter();
 const log                 = new StandardLogger( console, ts_ctr, env );
-const amqp_connection     = new AmqpConnection( amqp_conf, emitter );
+const amqp_connection     = new AmqpConnection( amqplib, amqp_conf, emitter );
 const publisher           = new DeltaPublisher(
     emitter,
     ts_ctr,

src/system/amqp/AmqpConnection.ts

@@ -17,25 +17,23 @@
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
- *
- * Amqp Connection
  */
 import { AmqpConfig } from '../AmqpPublisher';
 import { EventEmitter } from "events";
-import {
-    connect as AmqpConnect,
-    Channel,
-    Connection,
-} from 'amqplib';
-
+import * as amqplib from "amqplib";
 
+/**
+ * Connection to AMQP exchange
+ *
+ * XXX: Needs tests!
+ */
 export class AmqpConnection
 {
     /** The amqp connection */
-    private _conn?: Connection;
+    private _conn?: amqplib.Connection;
 
     /** The amqp channel */
-    private _channel?: Channel;
+    private _channel?: amqplib.Channel;
 
 
     /**
@@ -45,6 +43,7 @@ export class AmqpConnection
      * @param _emitter - event emitter instance
      */
     constructor(
+        private readonly _amqp:    typeof amqplib,
         private readonly _conf:    AmqpConfig,
         private readonly _emitter: EventEmitter,
     ) {}
@@ -55,7 +54,7 @@ export class AmqpConnection
      */
     connect(): Promise<void>
     {
-        return AmqpConnect( this._conf )
+        return this._amqp.connect( this._conf )
             .then( conn =>
             {
                 this._conn = conn;
@@ -72,16 +71,17 @@ export class AmqpConnection
 
                 return this._conn.createChannel();
             } )
-            .then( ( ch: Channel ) =>
+            .then( ( ch: amqplib.Channel ) =>
             {
                 this._channel = ch;
 
-                this._channel.assertExchange(
+                return this._channel.assertExchange(
                     this._conf.exchange,
                     'fanout',
                     { durable: true }
                 );
-            } );
+            } )
+            .then( _ => {} );
     }
 
 
@@ -130,7 +130,7 @@ export class AmqpConnection
      *
      * @return exchange name
      */
-    getAmqpChannel(): Channel | undefined
+    getAmqpChannel(): amqplib.Channel | undefined
     {
         if ( !this._channel )
         {

test/system/amqp/AmqpConnectionTest.ts

@@ -0,0 +1,69 @@
+/**
+ * Tests AmqpConnection
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of liza.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Amqp Connection
+ */
+
+import { AmqpConnection as Sut } from "../../../src/system/amqp/AmqpConnection";
+import { AmqpConfig } from "../../../src/system/AmqpPublisher";
+import { EventEmitter } from "events";
+import * as amqplib from "amqplib";
+
+import { expect, use as chai_use } from 'chai';
+chai_use( require( 'chai-as-promised' ) );
+
+describe( 'AmqpConnection', () =>
+{
+    describe( '#connect', () =>
+    {
+        it( "fails when exchange cannot be asserted", () =>
+        {
+            const expected_err = new Error( "test failure" );
+
+            const mock_channel = <amqplib.Channel>(<unknown>{
+                assertExchange() {
+                    return Promise.reject( expected_err );
+                },
+            });
+
+            const mock_connection = <amqplib.Connection>(<unknown>{
+                once() {},
+
+                createChannel() {
+                    return Promise.resolve( mock_channel );
+                },
+            });
+
+            const mock_amqp = <typeof amqplib>(<unknown>{
+                connect() {
+                    return Promise.resolve( mock_connection );
+                }
+            });
+
+            const emitter = new EventEmitter();
+            const conf    = <AmqpConfig>{};
+            const sut     = new Sut( mock_amqp, conf, emitter );
+
+            return expect( sut.connect() )
+                .to.eventually.be.rejectedWith( expected_err );
+        } );
+    } );
+} );
+