add WeakMapExporter (#4)

Author: JanTvrdik

src/InternalObjectExporter/WeakMapExporter.php

@@ -0,0 +1,32 @@
+<?php declare(strict_types = 1);
+
+namespace ShipMonk\MemoryScanner\InternalObjectExporter;
+
+use ShipMonk\MemoryScanner\InternalObjectExporter;
+use WeakMap;
+
+/**
+ * @implements InternalObjectExporter<WeakMap<object, mixed>>
+ */
+final class WeakMapExporter implements InternalObjectExporter
+{
+
+    public function getClassName(): string
+    {
+        return WeakMap::class;
+    }
+
+    public function getProperties(object $object): array
+    {
+        $values = [];
+
+        foreach ($object as $value) {
+            $values[] = $value;
+        }
+
+        return [
+            'values' => $values,
+        ];
+    }
+
+}

src/MemoryScanner.php

@@ -8,6 +8,7 @@
 use ShipMonk\MemoryScanner\InternalObjectExporter\ReflectionFiberExporter;
 use ShipMonk\MemoryScanner\InternalObjectExporter\ReflectionFunctionExporter;
 use ShipMonk\MemoryScanner\InternalObjectExporter\ReflectionGeneratorExporter;
+use ShipMonk\MemoryScanner\InternalObjectExporter\WeakMapExporter;
 use ShipMonk\MemoryScanner\MemoryRootsProvider\AutoloadMemoryRootsProvider;
 use ShipMonk\MemoryScanner\MemoryRootsProvider\ClassLikeMemoryRootsProvider;
 use ShipMonk\MemoryScanner\MemoryRootsProvider\ConstantMemoryRootsProvider;
@@ -74,6 +75,7 @@ public static function create(): self
         $memoryScanner->registerInternalObjectExporter(new ReflectionFiberExporter());
         $memoryScanner->registerInternalObjectExporter(new ReflectionFunctionExporter());
         $memoryScanner->registerInternalObjectExporter(new ReflectionGeneratorExporter());
+        $memoryScanner->registerInternalObjectExporter(new WeakMapExporter());
 
         return $memoryScanner;
     }

tests/InternalObjectExporter/WeakMapExporterTest.php

@@ -0,0 +1,23 @@
+<?php declare(strict_types = 1);
+
+namespace ShipMonkTests\MemoryScanner\InternalObjectExporter;
+
+use ShipMonk\MemoryScanner\InternalObjectExporter\WeakMapExporter;
+use ShipMonkTests\MemoryScanner\MemoryScannerTestCase;
+use stdClass;
+use WeakMap;
+
+class WeakMapExporterTest extends MemoryScannerTestCase
+{
+
+    public function testGetProperties(): void
+    {
+        $object = new stdClass();
+        $weakMap = new WeakMap();
+        $weakMap[$object] = 1;
+
+        $exporter = new WeakMapExporter();
+        self::assertSame(['values' => [1]], $exporter->getProperties($weakMap));
+    }
+
+}