Add test coverage for Mustache.php 2.0

Update legacy tests for new codebase.

test/Mustache/Test/Loader/ArrayLoaderTest.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace Mustache\Test\Loader;
+
+use Mustache\Loader\ArrayLoader;
+
+/**
+ * @group unit
+ */
+class ArrayLoaderTest extends \PHPUnit_Framework_TestCase {
+	public function testConstructor() {
+		$loader = new ArrayLoader(array(
+			'foo' => 'bar'
+		));
+
+		$this->assertEquals('bar', $loader->load('foo'));
+	}
+
+	public function testSetAndLoadTemplates() {
+		$loader = new ArrayLoader(array(
+			'foo' => 'bar'
+		));
+		$this->assertEquals('bar', $loader->load('foo'));
+
+		$loader->setTemplate('baz', 'qux');
+		$this->assertEquals('qux', $loader->load('baz'));
+
+		$loader->setTemplates(array(
+			'foo' => 'FOO',
+			'baz' => 'BAZ',
+		));
+		$this->assertEquals('FOO', $loader->load('foo'));
+		$this->assertEquals('BAZ', $loader->load('baz'));
+	}
+
+	/**
+	 * @expectedException \InvalidArgumentException
+	 */
+	public function testMissingTemplatesThrowExceptions() {
+		$loader = new ArrayLoader;
+		$loader->load('not_a_real_template');
+	}
+}