public function testMapUnmap() {
		$testApp = Libraries::get(true, 'resources') . '/tmp/tests/test_app';
		mkdir($testApp, 0777, true);
		Libraries::add('test_app', array('path' => $testApp));

		mkdir($testApp. '/lib', 0777);
		mkdir($testApp. '/_patch', 0777);

		file_put_contents($testApp . '/lib/LibTest.php',
		"<?php namespace test_app\\lib;\n
			class LibTest{ public function testMe() {
				return 'core class';
			}}"
		);

		file_put_contents($testApp . '/_patch/PatchedLibTest.php',
		"<?php namespace test_app\\lib;\n
			class LibTest{ public function testMe() {
				return 'patched class';
			}}"
		);

		$expected = $result = Libraries::realPath($testApp . '/lib/LibTest.php');
		$result = Libraries::path('test_app\\lib\\LibTest');

		$this->assertEqual($expected, $result);

		Libraries::map(array(
			'test_app\\lib\\LibTest' => $testApp . '/_patch/PatchedLibTest.php'
		));

		$expected = $result = Libraries::realPath($testApp . '/_patch/PatchedLibTest.php');
		$result = Libraries::path('test_app\\lib\\LibTest');

		Libraries::unmap(array('test_app\\lib\\LibTest'));

		$expected = $result = Libraries::realPath($testApp . '/lib/LibTest.php');
		$result = Libraries::path('test_app\\lib\\LibTest');

		$this->assertEqual($expected, $result);

		Libraries::map(array(
			'test_app\\lib\\LibTest' => $testApp . '/_patch/PatchedLibTest.php'
		));
		Libraries::unmap('test_app\\lib\\LibTest');

		$expected = $result = Libraries::realPath($testApp . '/lib/LibTest.php');
		$result = Libraries::path('test_app\\lib\\LibTest');

		Libraries::map(array(
			'test_app\\lib\\LibTest' => $testApp . '/_patch/PatchedLibTest.php'
		));

		$object = new \test_app\lib\LibTest();

		$result = $object->testMe();
		$this->assertEqual('patched class', $result);

		$this->_cleanUp();
	}