Test possible stream conflicts

Author: natanfelles

tests/Streams/FilterStreamTest.php

@@ -0,0 +1,30 @@
+<?php
+/*
+ * This file is part of Aplus Framework CLI Library.
+ *
+ * (c) Natan Felles <natanfelles@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Tests\CLI\Streams;
+
+use Framework\CLI\Streams\Stderr;
+use Framework\CLI\Streams\Stdout;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * @runTestsInSeparateProcesses
+ */
+final class FilterStreamTest extends TestCase
+{
+    public function testConflicts() : void
+    {
+        Stderr::init();
+        Stdout::init();
+        \fwrite(\STDERR, 'err');
+        \fwrite(\STDOUT, 'out');
+        self::assertSame('err', Stderr::getContents());
+        self::assertSame('out', Stdout::getContents());
+    }
+}