Ubuntu 怎样安装phpunit

安装方法：

pear upgrade PEAR
sudo pear channel-discover pear.phpunit.de
sudo pear install --alldeps phpunit/PHPUnitpear help
pear install phpunit/PHPUnit_Selenium
pear list phpunit

目标程序 ：Demo.php
<?php
class Demo {
public function sum($a,$b) {
return $a+$b;
}
public function subtract($a,$b){
return $a-$b;
}
}

用例程序 : DemoTest.php
<?php
require ('./Demo.php');

class DemoTest extends PHPUnit_Framework_TestCase {
public function testSum() {
$demo = new Demo();
$this->assertEquals(4,$demo->sum(2,2));
$this->assertNotEquals(2,$demo->sum(3,1));
}
}