Return file in valid case

tests/LoaderTest.php

@@ -0,0 +1,47 @@
+<?php
+namespace Ely\TempMailBuster;
+
+class LoaderTest extends \PHPUnit_Framework_TestCase
+{
+    public function testGetPaths()
+    {
+        $this->assertTrue(is_array(Loader::getPaths()));
+    }
+
+    public function testLoad()
+    {
+        $this->assertTrue(is_array(Loader::load()));
+    }
+
+    public function testLoadExceptionWrongPaths()
+    {
+        $this->expectException('Exception');
+        LoaderWithWrongPaths::load();
+    }
+
+    public function testLoadExceptionInvalidJson()
+    {
+        $this->expectException('Exception');
+        LoaderWithInvalidJson::load();
+    }
+}
+
+class LoaderWithWrongPaths extends Loader
+{
+    public static function getPaths()
+    {
+        return [
+            __DIR__ . '/virtual_reality.json',
+        ];
+    }
+}
+
+class LoaderWithInvalidJson extends Loader
+{
+    public static function getPaths()
+    {
+        return [
+            __DIR__ . '/LoaderTest.php',
+        ];
+    }
+}