Add test for https://github.com/friendica/friendica/issues/10473#issuecomment-907749093

tests/src/Network/HTTPClientTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Friendica\Test\src\Network;
+
+use Friendica\DI;
+use Friendica\Test\DiceHttpMockHandlerTrait;
+use Friendica\Test\MockedTest;
+use GuzzleHttp\Handler\MockHandler;
+use GuzzleHttp\Psr7\Response;
+
+class HTTPClientTest extends MockedTest
+{
+	use DiceHttpMockHandlerTrait;
+
+	protected function setUp(): void
+	{
+		parent::setUp();
+
+		$this->setupHttpMockHandler();
+	}
+
+	/**
+	 * Test for issue https://github.com/friendica/friendica/issues/10473#issuecomment-907749093
+	 */
+	public function testInvalidURI()
+	{
+		$this->httpRequestHandler->setHandler(new MockHandler([
+			new Response(301, ['Location' => 'https:///']),
+		]));
+
+		$httpClient = DI::httpClient();
+		$httpClient->get('https:///');
+
+		self::assertEquals(1,1);
+	}
+}