Fix cycle dependency for repeated field not collected by gc (#3399)

1 files changed, 23 insertions, 0 deletions

diff --git a/php/tests/map_field_test.php b/php/tests/map_field_test.php
index 120b1bde..cffa2526 100644
--- a/php/tests/map_field_test.php
+++ b/php/tests/map_field_test.php
@@ -417,6 +417,29 @@ class MapFieldTest extends PHPUnit_Framework_TestCase {
         $this->assertSame(1, $arr[0]->getA());
 
         $this->assertEquals(1, count($arr));
+
+        // Test foreach.
+        $arr = new MapField(GPBType::INT32,
+            GPBType::MESSAGE, TestMessage_Sub::class);
+        for ($i = 0; $i < 3; $i++) {
+          $arr[$i] = new TestMessage_Sub();;
+          $arr[$i]->setA($i);
+        }
+        $i = 0;
+        $key_test = [];
+        $value_test = [];
+        foreach ($arr as $key => $val) {
+          $key_test[] = $key;
+          $value_test[] = $val->getA();
+          $i++;
+        }
+        $this->assertTrue(isset($key_test['0']));
+        $this->assertTrue(isset($key_test['1']));
+        $this->assertTrue(isset($key_test['2']));
+        $this->assertTrue(isset($value_test['0']));
+        $this->assertTrue(isset($value_test['1']));
+        $this->assertTrue(isset($value_test['2']));
+        $this->assertSame(3, $i);
     }
 
     #########################################################