add test

tests/ChunkFileFactoryTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace Recca0120\Upload\Tests;
+
+use Mockery as m;
+use PHPUnit\Framework\TestCase;
+use Recca0120\Upload\ChunkFileFactory;
+
+class ChunkFileFactoryTest extends TestCase
+{
+    protected function tearDown()
+    {
+        parent::tearDown();
+        m::close();
+    }
+
+    public function testCreate()
+    {
+        $chunkFileFactory = new ChunkFileFactory(
+            $files = m::mock('Recca0120\Upload\Filesystem')
+        );
+
+        $files->shouldReceive('mimeType')->once()->andReturn('text/plain');
+
+        $this->assertInstanceOf('Recca0120\Upload\ChunkFile', $chunkFileFactory->create('foo.php', 'foo.chunksPath', 'foo.storagePath', 'foo.token'));
+    }
+}