<?php
/**
 * implementation of a very basic unit testing class
 */
abstract class UnitTest {

	/**
	 *
	 * check the value is true
	 * @param mixed $expr
	 */
	 public function assertTrue($expr) {
		if (!$expr) {
			$this->_printAssertResult("{$expr} - assertTrue failed!");
		}
	}

	/**
	 *
	 * check the value is false
	 * @param mixed $expr
	 */
	 public function assertFalse($expr) {
		if ($expr) {
			$this->_printAssertResult("{$expr} - assertFalse failed!");
		}
	}

	/**
	 *
	 * check the two values are equal
	 * @param mixed $expr1
	 * @param mixed $expr2
	 */
	public function assertEquals($expr1, $expr2) {
		if ($expr1 != $expr2) {
			$this->_printAssertResult("{$expr1} not equals {$expr2}");
		}
	}

	/**
	 *
	 * check the two values are equal and have the same type
	 * @param mixed $expr1
	 * @param mixed $expr2
	 */
	public function assertEqualsStrict($expr1, $expr2) {
		if ($expr1 !== $expr2) {
			$this->_printAssertResult("{$expr1} not equals {$expr2}");
		}
	}

	/**
	 *
	 * execute the tests in the extending class.
	 * All testing method should start with "test" (lowercase)
	 */
	public function run() {
		echo '---- Starting the Test (',date('d.m.Y H:i:s'),') -----', "\r\n";

		// read all methods, and execute tests
		$methods_list = get_class_methods($this);
		if (!empty($methods_list)) {
			foreach ($methods_list as $method) {
				if (preg_match('%^test%', $method)) {
					echo 'testing ', preg_replace('%^test%', '', $method), "\r\n";
					$this->$method();
				}
			}
		}
	}

	/** ************ PROTECTED SECTION *************** **/

	/**
	 *
	 * print assertion result
	 * @param string $message
	 */
	protected function _printAssertResult($message) {
		echo "{$message}\n";
	}

}