PHPC-1548: Add tests for empty authSource URI option

Author: alcaeus

tests/manager/manager-ctor-auth_source_error-001.phpt

@@ -0,0 +1,29 @@
+--TEST--
+MongoDB\Driver\Manager::__construct(): empty authSource option causes error
+--FILE--
+<?php
+
+require_once __DIR__ . '/../utils/basic.inc';
+
+$tests = [
+    ['mongodb://[email protected]/?authSource=', []],
+    [null, ['authSource' => '']],
+];
+
+foreach ($tests as $test) {
+    [$uri, $options] = $test;
+
+    echo throws(function() use ($uri, $options) {
+        new MongoDB\Driver\Manager($uri, $options);
+    }, "MongoDB\Driver\Exception\InvalidArgumentException"), "\n";
+}
+
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECT--
+OK: Got MongoDB\Driver\Exception\InvalidArgumentException
+Failed to parse MongoDB URI: 'mongodb://[email protected]/?authSource='. authSource may not be specified as an empty string.
+OK: Got MongoDB\Driver\Exception\InvalidArgumentException
+Failed to parse URI options: authSource may not be specified as an empty string
+===DONE===