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-rw-r--r--php/tests/encode_decode_test.php7
1 files changed, 7 insertions, 0 deletions
diff --git a/php/tests/encode_decode_test.php b/php/tests/encode_decode_test.php
index 4dca922b..4512c871 100644
--- a/php/tests/encode_decode_test.php
+++ b/php/tests/encode_decode_test.php
@@ -466,6 +466,13 @@ class EncodeDecodeTest extends TestBase
$m->mergeFromString($from);
$to = $m->serializeToString();
$this->assertSame(bin2hex($from), bin2hex($to));
+
+ $m = new TestMessage();
+ $from = hex2bin('F80601');
+ $m->mergeFromString($from);
+ $m->discardUnknownFields();
+ $to = $m->serializeToString();
+ $this->assertSame("", bin2hex($to));
}
public function testJsonEncode()