Report memory-usage while coverage report generation

Author: staabm

src/Runner/CodeCoverage.php

@@ -9,6 +9,10 @@
  */
 namespace PHPUnit\Runner;
 
+use PHPUnit\Event\Telemetry\MemoryMeter;
+use PHPUnit\Event\Telemetry\MemoryUsage;
+use PHPUnit\Event\Telemetry\SystemMemoryMeter;
+use SebastianBergmann\Timer\ResourceUsageFormatter;
 use function assert;
 use function file_put_contents;
 use function sprintf;
@@ -62,6 +66,16 @@ final class CodeCoverage
     private bool $collecting = false;
     private ?TestCase $test  = null;
     private ?Timer $timer    = null;
+    private ?MemoryUsage $memoryStartUsage = null;
+
+    /**
+     * @var array<string,int>
+     */
+    private const array SIZES = [
+        'GB' => 1073741824,
+        'MB' => 1048576,
+        'KB' => 1024,
+    ];
 
     public static function instance(): self
     {
@@ -448,6 +462,7 @@ private function codeCoverageGenerationStart(Printer $printer, string $format):
         );
 
         $this->timer()->start();
+        $this->memoryStartUsage = $this->memoryMeter()->memoryUsage();
     }
 
     /**
@@ -457,8 +472,9 @@ private function codeCoverageGenerationSucceeded(Printer $printer): void
     {
         $printer->print(
             sprintf(
-                "done [%s]\n",
+                "done [Time: %s, Memory: %s]\n",
                 $this->timer()->stop()->asString(),
+                $this->bytesToString($this->memoryMeter()->memoryUsage()->diff($this->memoryStartUsage)->bytes()),
             ),
         );
     }
@@ -470,8 +486,9 @@ private function codeCoverageGenerationFailed(Printer $printer, CodeCoverageExce
     {
         $printer->print(
             sprintf(
-                "failed [%s]\n%s\n",
+                "failed [Time: %s, Memory: %s]\n%s\n",
                 $this->timer()->stop()->asString(),
+                $this->bytesToString($this->memoryMeter()->memoryUsage()->diff($this->memoryStartUsage)->bytes()),
                 $e->getMessage(),
             ),
         );
@@ -485,4 +502,22 @@ private function timer(): Timer
 
         return $this->timer;
     }
+
+    private function memoryMeter(): MemoryMeter
+    {
+        return new SystemMemoryMeter();
+    }
+
+    private function bytesToString(int $bytes): string
+    {
+        foreach (self::SIZES as $unit => $value) {
+            if ($bytes >= $value) {
+                return sprintf('%.2f %s', $bytes / $value, $unit);
+            }
+        }
+
+        // @codeCoverageIgnoreStart
+        return $bytes . ' byte' . ($bytes !== 1 ? 's' : '');
+        // @codeCoverageIgnoreEnd
+    }
 }