Failing tests if there are any unsilenced logs

lib/logger.js

@@ -23,6 +23,7 @@ const defaultConfig = {
 };
 
 let messages = {};
+let unsilencedLogs = [];
 let config = {};
 
 const reset = function() {
@@ -31,6 +32,7 @@ const reset = function() {
         messages[messageKey] = [];
     }
     config = Object.assign({}, defaultConfig);
+    unsilencedLogs = [];
 };
 reset();
 
@@ -40,6 +42,7 @@ function log(message) {
     }
 
     console.log(message);
+    unsilencedLogs.push(message);
 }
 
 module.exports = {
@@ -73,6 +76,10 @@ module.exports = {
         return messages;
     },
 
+    getUnsilencedLogs() {
+        return unsilencedLogs;
+    },
+
     quiet(setQuiet = true) {
         config.quiet = setQuiet;
     },

test/_unsilencedLogsCheck.js

@@ -0,0 +1,20 @@
+/*
+ * This file is part of the Symfony Webpack Encore package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+'use strict';
+
+const logger = require('../lib/logger');
+
+afterEach(function() {
+    const unsilencedLogs = logger.getUnsilencedLogs();
+
+    if (unsilencedLogs.length > 0) {
+        this.test.error(new Error(`There were ${unsilencedLogs.length} un-silenced logs messages`));
+    }
+});