Fixes syntax of Prometheus logger and adds a test

Author: moebrowne

src/Log/Prometheus.php

@@ -87,7 +87,7 @@ public function onPhpbuEnd(Event\App\End $event)
         $this->write('# HELP phpbu_backup_success Whether or not the backup succeeded' . PHP_EOL);
         $this->write('# TYPE phpbu_backup_success gauge' . PHP_EOL);
         foreach ($event->getResult()->getBackups() as $backupResult) {
-            $this->write('phpbu_backup_success{name="' . $backupResult->getName() . '} ' . (int)$backupResult->allOk() . PHP_EOL);
+            $this->write('phpbu_backup_success{name="' . $backupResult->getName() . '"} ' . (int)$backupResult->allOk() . PHP_EOL);
         }
 
         $this->write(PHP_EOL);
@@ -96,23 +96,23 @@ public function onPhpbuEnd(Event\App\End $event)
         $this->write('# TYPE phpbu_backup_duration gauge' . PHP_EOL);
         foreach ($this->backupStats as $backupName => $backupStats) {
             $duration = $this->backupStats[$backupName]['timeEnd'] - $this->backupStats[$backupName]['timeStart'];
-            $this->write('phpbu_backup_duration{name="' . $backupName . '} ' . $duration . PHP_EOL);
+            $this->write('phpbu_backup_duration{name="' . $backupName . '"} ' . $duration . PHP_EOL);
         }
 
         $this->write(PHP_EOL);
 
         $this->write('# HELP phpbu_backup_last_run The unix timestamp of the last run' . PHP_EOL);
         $this->write('# TYPE phpbu_backup_last_run counter' . PHP_EOL);
         foreach ($this->backupStats as $backupName => $backupStats) {
-            $this->write('phpbu_backup_last_run{name="' . $backupName . '} ' . (int)$this->backupStats[$backupName]['lastRun'] . PHP_EOL);
+            $this->write('phpbu_backup_last_run{name="' . $backupName . '"} ' . (int)$this->backupStats[$backupName]['lastRun'] . PHP_EOL);
         }
 
         $this->write(PHP_EOL);
 
         $this->write('# HELP phpbu_backup_size The size of the last successful backup' . PHP_EOL);
         $this->write('# TYPE phpbu_backup_size gauge' . PHP_EOL);
         foreach ($this->backupStats as $backupName => $backupStats) {
-            $this->write('phpbu_backup_size{name="' . $backupName . '} ' . $this->backupStats[$backupName]['size'] . PHP_EOL);
+            $this->write('phpbu_backup_size{name="' . $backupName . '"} ' . $this->backupStats[$backupName]['size'] . PHP_EOL);
         }
 
     }

tests/phpbu/Log/PrometheusTest.php

@@ -0,0 +1,98 @@
+<?php
+namespace phpbu\App\Log;
+
+use phpbu\App\Configuration\Backup;
+
+/**
+ * Json Test
+ *
+ * @package    phpbu
+ * @subpackage tests
+ * @author     MoeBrowne
+ * @license    https://opensource.org/licenses/MIT The MIT License (MIT)
+ * @since      Class available since Release 6.0.0
+ */
+class PrometheusTest extends \PHPUnit\Framework\TestCase
+{
+
+    /**
+     * Tests Prometheus::onBackupEnd
+     */
+    public function testOutput()
+    {
+        // result mock
+        $result = $this->getResultMock();
+
+        // config mock
+        $backupConf = $this->createMock(Backup::class);
+        $backupConf->method('getName')->willReturn('backupName');
+
+        // backup start event mock
+        $backupStartEvent = $this->createMock(\phpbu\App\Event\Backup\Start::class);
+        $backupStartEvent->method('getConfiguration')->willReturn($backupConf);
+
+        // backup end event mock
+        $backupEndEvent = $this->createMock(\phpbu\App\Event\Backup\End::class);
+        $backupEndEvent->method('getConfiguration')->willReturn($backupConf);
+
+        // phpbu end event mock
+        $phpbuEndEvent = $this->createMock(\phpbu\App\Event\App\End::class);
+        $phpbuEndEvent->method('getResult')->willReturn($result);
+
+        $prometheus = new Prometheus();
+        $prometheus->setup(['target' => 'php://output']);
+
+        $prometheus->onBackupStart($backupStartEvent);
+        $prometheus->onBackupEnd($backupEndEvent);
+
+        ob_flush();
+        ob_start();
+        $prometheus->onPhpbuEnd($phpbuEndEvent);
+        $output = ob_get_clean();
+
+        $this->assertStringContainsString('phpbu_backup_success{name="foo"} 0', $output);
+        $this->assertStringContainsString('phpbu_backup_duration{name="backupName"} ', $output);
+        $this->assertStringContainsString('phpbu_backup_last_run{name="backupName"} ', $output);
+        $this->assertStringContainsString('phpbu_backup_size{name="backupName"} ', $output);
+    }
+
+    /**
+     * Create a app result mock
+     *
+     * @return \phpbu\App\Result
+     */
+    protected function getResultMock()
+    {
+        $result = $this->createMock(\phpbu\App\Result::class);
+        $result->method('started')->willReturn(microtime(true));
+        $result->method('allOk')->willReturn(true);
+        $result->method('getErrors')->willReturn([new \Exception('foo bar')]);
+        $result->method('getBackups')->willReturn([$this->getBackupResultMock()]);
+        $result->method('backupsFailedCount')->willReturn(0);
+        $result->method('errorCount')->willReturn(1);
+
+        return $result;
+    }
+
+    /**
+     * Create a backup result mock
+     *
+     * @return \phpbu\App\Result\Backup
+     */
+    protected function getBackupResultMock()
+    {
+        $backup = $this->createMock(\phpbu\App\Result\Backup::class);
+        $backup->method('getName')->willReturn('foo');
+        $backup->method('wasSuccessful')->willReturn(true);
+        $backup->method('checkCount')->willReturn(0);
+        $backup->method('checkCountFailed')->willReturn(0);
+        $backup->method('syncCount')->willReturn(0);
+        $backup->method('syncCountSkipped')->willReturn(0);
+        $backup->method('syncCountFailed')->willReturn(0);
+        $backup->method('cleanupCount')->willReturn(0);
+        $backup->method('cleanupCountSkipped')->willReturn(0);
+        $backup->method('cleanupCountFailed')->willReturn(0);
+
+        return $backup;
+    }
+}