diff --git a/tests/serializer/HTMLSerializerTest.php b/tests/serializer/HTMLSerializerTest.php
index 7604c02..fb2bff5 100644
--- a/tests/serializer/HTMLSerializerTest.php
+++ b/tests/serializer/HTMLSerializerTest.php
@@ -164,6 +164,59 @@ public function testEncodingGetSerializedCorrectly() {
}
+ public function testNoRedundantNamespaceDeclarationsAreCreated(): void {
+ $dom = new DOMDocument();
+ $dom->preserveWhiteSpace = false;
+ $dom->loadXML('
+
+
+
+
+
+
+
+
+ ');
+
+ $expected = implode("\n", [
+ '',
+ ' ',
+ ' ',
+ ' ',
+ '
',
+ ' ',
+ ' ',
+ '
',
+ '' . "\n"
+ ]);
+
+ $this->assertSame(
+ $expected,
+ (new HTMLSerializer())->noHtml5Doctype()->serialize($dom)
+ );
+ }
+
+ public function testNoRedundantNamespacesAreCreated(): void {
+ $dom = new DOMDocument();
+ $dom->preserveWhiteSpace = false;
+ $dom->loadXML(
+ '
+
+
+ ');
+
+ $expected = implode("\n", [
+ '',
+ ' ',
+ '' . "\n"
+ ]);
+
+ $this->assertSame(
+ $expected,
+ (new HTMLSerializer())->noHtml5Doctype()->serialize($dom)
+ );
+ }
+
private function createInputDocument(): Document {
return Document::fromString(file_get_contents(__DIR__ . '/../_data/serializer/input.xml'));