Fix testGetProxyUri

Changed the implementation for getProxyUri with
fd1d85365c

If proxy is already null then we don't ask for proxyuserpwd. Test
failed because we expected getSystemValue to be called once with
proxyuserpwd

Signed-off-by: Daniel Kesselberg <mail@danielkesselberg.de>

tests/lib/Http/Client/ClientTest.php

@@ -49,11 +49,6 @@ class ClientTest extends \Test\TestCase {
 			->method('getSystemValue')
 			->with('proxy', null)
 			->willReturn(null);
-		$this->config
-			->expects($this->at(1))
-			->method('getSystemValue')
-			->with('proxyuserpwd', null)
-			->willReturn(null);
 		$this->assertNull(self::invokePrivate($this->client, 'getProxyUri'));
 	}
 
@@ -269,7 +264,7 @@ class ClientTest extends \Test\TestCase {
 
 	public function testSetDefaultOptionsWithNotInstalled(): void {
 		$this->config
-			->expects($this->at(2))
+			->expects($this->at(1))
 			->method('getSystemValue')
 			->with('installed', false)
 			->willReturn(false);