[TASK] Restructure tests/ folder.

Move unit tests to tests/unit/. Get the old still working UnitTests
into a working state again.
Updated composer.json with required-dev packages.
Create a new folder tests/acceptance for Behat functional/acceptance
testing. Add a first Feature draft of a Behat functional test for
local login.

tests/unit/UploadTest.php

@@ -0,0 +1,31 @@
+<?php
+/**
+ * this file contains tests for the uploader
+ *
+ * @package test.util
+ */
+
+use PHPUnit\Framework\TestCase;
+
+/** required, it is the file under test */
+require_once('include/attach.php');
+
+/**
+ * TestCase for the uploader
+ *
+ * @author ken restivo
+ * @package test.util
+ */
+class UploadTest extends TestCase {
+	public function testFileNameMutipleDots() {
+		$multidots = "foo.bar.baz.0.1.3.ogg";
+		$this->assertEquals("audio/ogg", z_mime_content_type($multidots));
+		$this->assertNotEquals("application/octet-stream", z_mime_content_type($multidots));
+	}
+
+	public function testFileNameOneDot() {
+		$multidots = "foo.ogg";
+		$this->assertEquals("audio/ogg", z_mime_content_type($multidots));
+		$this->assertNotEquals("application/octet-stream", z_mime_content_type($multidots));
+	}
+}