Added some test cases

Author: derickr

tests/connect/compression_error-001.phpt

@@ -0,0 +1,18 @@
+--TEST--
+MongoDB\Driver\Manager: Connecting with unsupported compressor
+--SKIPIF--
+<?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
+<?php NEEDS('STANDALONE'); ?>
+--FILE--
+<?php
+require_once __DIR__ . "/../utils/basic.inc";
+
+ini_set('mongodb.debug', 'stdout');
+$manager = new MongoDB\Driver\Manager(STANDALONE, [ 'compressors' => 'zli'] );
+ini_set('mongodb.debug', null);
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECTF--
+%AWARNING > Unsupported compressor: 'zli'%A
+===DONE===

tests/connect/compression_error-002.phpt

@@ -0,0 +1,19 @@
+--TEST--
+MongoDB\Driver\Manager: Connecting with invalid compressor values
+--SKIPIF--
+<?php require __DIR__ . "/../utils/basic-skipif.inc"; ?>
+<?php NEEDS('STANDALONE'); ?>
+--FILE--
+<?php
+require_once __DIR__ . "/../utils/basic.inc";
+
+echo throws(function() {
+    $manager = new MongoDB\Driver\Manager(STANDALONE, [ 'compressors' => "foo\xFEbar"] );
+}, 'MongoDB\Driver\Exception\UnexpectedValueException'), "\n";
+?>
+===DONE===
+<?php exit(0); ?>
+--EXPECTF--
+OK: Got MongoDB\Driver\Exception\UnexpectedValueException
+Detected invalid UTF-8 for fieldname "compressors": %s
+===DONE===