Show debug log only when tests fail (PHPMailer#1161)

.travis.yml

@@ -40,7 +40,7 @@ before_script:
     fi
 
 script:
-  - ./vendor/bin/phpunit --configuration ./travis.phpunit.xml.dist --bootstrap ./vendor/autoload.php
+  - ./vendor/bin/phpunit --configuration ./travis.phpunit.xml.dist
   - if [ "$CS_CHECK" = 1 ]; then ./vendor/bin/php-cs-fixer --diff --dry-run --verbose fix; fi
 
 after_script:

composer.json

@@ -45,5 +45,10 @@
             "PHPMailer\\PHPMailer\\": "src/"
         }
     },
+    "autoload-dev": {
+        "psr-4": {
+            "PHPMailer\\Test\\": "test/"
+        }
+    },
     "license": "LGPL-2.1"
 }

test/DebugLogTestListener.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * PHPMailer - language file tests.
+ *
+ * PHP version 5.5.
+ *
+ * @author    Marcus Bointon <phpmailer@synchromedia.co.uk>
+ * @author    Andy Prevost
+ * @copyright 2010 - 2017 Marcus Bointon
+ * @copyright 2004 - 2009 Andy Prevost
+ * @license   http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
+ */
+
+namespace PHPMailer\Test;
+
+class DebugLogTestListener extends \PHPUnit_Framework_BaseTestListener
+{
+    private static $debugLog = '';
+
+    public function addError(\PHPUnit_Framework_Test $test, \Exception $e, $time)
+    {
+        echo self::$debugLog;
+    }
+
+    public function addFailure(\PHPUnit_Framework_Test $test, \PHPUnit_Framework_AssertionFailedError $e, $time)
+    {
+        echo self::$debugLog;
+    }
+
+    public function startTest(\PHPUnit_Framework_Test $test)
+    {
+        self::$debugLog = '';
+    }
+
+    public static function debugLog($str)
+    {
+        self::$debugLog .= $str . PHP_EOL;
+    }
+}

test/PHPMailerTest.php

@@ -70,6 +70,7 @@ public function setUp()
         }
         $this->Mail = new PHPMailer();
         $this->Mail->SMTPDebug = 3; //Full debug output
+        $this->Mail->Debugoutput = ['PHPMailer\Test\DebugLogTestListener', 'debugLog'];
         $this->Mail->Priority = 3;
         $this->Mail->Encoding = '8bit';
         $this->Mail->CharSet = 'iso-8859-1';

travis.phpunit.xml.dist

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phpunit
+         bootstrap="vendor/autoload.php"
          verbose="false"
          stopOnError="false"
          stopOnFailure="false"
@@ -8,14 +9,17 @@
          convertErrorsToExceptions="true"
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
-         colors="false"
+         colors="true"
          forceCoversAnnotation="false"
          processIsolation="false">
     <testsuites>
         <testsuite name="PHPMailer Tests">
             <directory>./test/</directory>
         </testsuite>
     </testsuites>
+    <listeners>
+        <listener class="PHPMailer\Test\DebugLogTestListener" />
+    </listeners>
     <groups>
         <exclude>
             <group>languages</group>