Add ProcessExecutor tests

tests/Composer/Test/Util/ProcessExecutorTest.php

@@ -0,0 +1,46 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Test\Util;
+
+use Composer\Util\ProcessExecutor;
+use Composer\Test\TestCase;
+
+class ProcessExecutorTest extends TestCase
+{
+    public function testExecuteCapturesOutput()
+    {
+        $process = new ProcessExecutor;
+        $process->execute('echo foo', $output);
+        $this->assertEquals("foo".PHP_EOL, $output);
+    }
+
+    public function testExecuteOutputsIfNotCaptured()
+    {
+        $process = new ProcessExecutor;
+        ob_start();
+        $process->execute('echo foo');
+        $output = ob_get_clean();
+        $this->assertEquals("foo".PHP_EOL, $output);
+    }
+
+    public function testSplitLines()
+    {
+        $process = new ProcessExecutor;
+        $this->assertEquals(array(), $process->splitLines(''));
+        $this->assertEquals(array(), $process->splitLines(null));
+        $this->assertEquals(array('foo'), $process->splitLines('foo'));
+        $this->assertEquals(array('foo', 'bar'), $process->splitLines("foo\nbar"));
+        $this->assertEquals(array('foo', 'bar'), $process->splitLines("foo\r\nbar"));
+        $this->assertEquals(array('foo', 'bar', ''), $process->splitLines("foo\r\nbar\n"));
+    }
+}