public function testFormulateWithFormula() {
		$path = $this->_testPath . '/library_test_plugin';
		mkdir($path);
		mkdir($path . '/config');
		file_put_contents(
			$path . '/config/library_test_plugin.json',
			json_encode(array(
				'name' => 'library_test_plugin',
				'version' => '1.0',
				'summary' => 'something',
				'sources' => array(
					'phar' => 'http://somewhere.com/download/library_test_plugin.phar.gz'
				)
			))
		);

		$result = $this->library->formulate($path);
		$this->assertTrue($result);

		$result = file_exists($path . '/config/library_test_plugin.json');
		$this->assertTrue($result);
	}