PHPUnit Pocket Guide

Chapter 17. PHPUnit for PHP 4

There is a release series of PHPUnit that works with PHP 4 and does not require PHP 5. Due to PHP 4's limited object model, PHPUnit for PHP 4 is not a complete port of JUnit as PHPUnit for PHP 5 is. It also lacks certain features of PHP-Unit for PHP 5, such as code-coverage analysis.

The PHPUnit release series for PHP 4 has its own PEAR package named PHPUnit (instead of PHPUnit2). This is because incompatible branches of PEAR packages (such as PHPUnit 1.X for PHP 4 and PHPUnit 2.X for PHP 5) have to be maintained in separate packages.

The following command line shows how to install PHPUnit for PHP 4 using the PEAR Installer:

$ pear install PHPUnit

A test-case class that is used with PHPUnit for PHP 4 is similar to one that is used with PHPUnit for PHP 5. The essential difference is that a PHP4 test class extends PHPUnit_ TestCase (which itself extends PHPUnit_Assert, the class that provides the assertion methods).

Example 28 shows a version of the ArrayTest test case that can be used with PHPUnit for PHP 4.

Example 28. Writing a test case for PHPUnit 1.x

<?php
require_once 'PHPUnit/TestCase.php';

class ArrayTest extends PHPUnit_TestCase {
	var $_fixture;

  function setUp( ) {
		$this->_fixture = Array( );
	}

  function testNewArrayIsEmpty( ) { 
		$this->assertEquals(0, sizeof($this->_fixture)); 
	}

  function testArrayContainsAnElement( ) {    
		$this->_fixture[] = 'Element'; 
		$this->assertEquals(1, sizeof($this->_fixture));
	}
}
?>

PHPUnit for PHP 4 does not provide a TextUI ...