PHP單元測試工具PHPUnit初體驗(yàn)
z33 <newbdez33 at gmail.com>
2005.10.27
今天接到了個(gè)任務(wù)，需要對數(shù)字進(jìn)行計(jì)算，因?yàn)樯婕暗秸麛?shù)，小數(shù)，和科學(xué)計(jì)數(shù)法等很多條件，所以人工測試非常麻煩，于是想到了PHP的單元測試工具PHPUnit，所以寫個(gè)文檔備查。
看了PHPUnit的文檔之后基本有了一些了解，
http://pear./manual/en/packages.php.phpunit.intro.php
工作流程如下：
1.設(shè)計(jì)你的class/API
2.創(chuàng)建測試程序集
3.實(shí)現(xiàn)class/API
4.運(yùn)行測試
5.修正測試失敗或錯(cuò)誤，回到第4步。
我們來舉個(gè)例子：
下面是你要測試的class，其中formatn函數(shù)一個(gè)取任意數(shù)字的5位有效數(shù)字的函數(shù)。
| 代碼: |
----------format_number.php-----------
class fo {
function fo() {
}
function formatn($num) {
$num = rtrim($num,"0");
$pos = strpos($num,".");
$num = str_replace(".","",$num);
$count1 = strlen($num);
$num = ltrim($num,"0");
$count2 = strlen($num);
$zeroc = $count1 - $count2;
$num = substr($num,0,6);
$num = round($num/10);
//$num = str_pad($num, 5, "0");
if ($pos !== false) {
$num = str_pad($num, (strlen($num)+$zeroc), "0", STR_PAD_LEFT);
$dotl = substr($num,0,$pos);
$dotr = substr($num,$pos);
$num = $dotl.".".$dotr;
}
return $num;
}
} |
接著創(chuàng)建TestCase，繼承自PHPUnit_TestCase
| 代碼: |
----------testcase.php-----------
<?php
require_once ‘format_number.php‘;
require_once ‘PHPUnit.php‘;
class foTest extends PHPUnit_TestCase {
//這個(gè)成員變量是存放要測試的類引用
var $abc;
//構(gòu)造函數(shù)
function foTest($name) {
$this->PHPUnit_TestCase($name);
}
//new一個(gè)要測試的類為成員變量abc賦值
function setUp() {
$this->abc = new fo;
}
//unset要測試的類
function tearDown() {
unset($this->abc);
}
//自定義的testcase
function testFormatn1() {
//調(diào)用要測試的類的方法，結(jié)果放到$result變量
$result = $this->abc->formatn("100.234");
//期望結(jié)果
$expected = "100.23";
//判斷是否相等，這里使用assertTrue方法來判斷布而值是否為true。
$this->assertTrue($result == $expected);
}
function testFormatn2() {
$result = $this->abc->formatn("0.100234");
$expected = "0.10023";
$this->assertTrue($result == $expected);
}
function testFormatn3() {
$result = $this->abc->formatn("0.100235");
$expected = "0.10024";
$this->assertTrue($result == $expected);
}
function testFormatn4() {
$result = $this->abc->formatn("0.000100235");
$expected = "0.00010024";
$this->assertTrue($result == $expected);
}
function testFormatn5() {
$result = $this->abc->formatn("0.000100232");
$expected = "0.00010023";
$this->assertTrue($result == $expected);
}
function testFormatn6() {
$result = $this->abc->formatn("1343");
$expected = "1343";
$this->assertTrue($result == $expected);
}
function testFormatn7() {
$result = $this->abc->formatn("1343.01");
$expected = "1343";
$this->assertTrue($result == $expected);
}
function testFormatn8() {
$result = $this->abc->formatn("1343.05");
$expected = "1343.1";
$this->assertTrue($result == $expected);
}
function testFormatn9() {
$result = $this->abc->formatn("0");
$expected = "0";
$this->assertTrue($result == $expected);
}
function testFormatn10() {
$result = $this->abc->formatn("105.2342");
$expected = "105.23";
$this->assertTrue($result == $expected);
}
function testFormatn11() {
$result = $this->abc->formatn("105.2375");
$expected = "105.24";
$this->assertTrue($result == $expected);
}
function testFormatn12() {
$result = $this->abc->formatn("0.000523751");
$expected = "0.00052375";
$this->assertTrue($result == $expected);
}
function testFormatn13() {
$result = $this->abc->formatn("0.000523755");
$expected = "0.00052376";
$this->assertTrue($result == $expected);
}
} |
最后還需要一個(gè)運(yùn)行測試的程序
| 代碼: |
----------runtest.php-----------
<?php
require_once ‘testcase.php‘;
require_once ‘PHPUnit.php‘;
$suite = new PHPUnit_TestSuite("foTest");
$result = PHPUnit::run($suite);
echo $result->toString();
?> |
現(xiàn)在就可以通過命令行運(yùn)行這個(gè)testcase
php runtest.php
得到結(jié)果如下：
| 代碼: |
TestCase foTest->testFormatn1() passed
TestCase foTest->testFormatn2() passed
TestCase foTest->testFormatn3() passed
TestCase foTest->testFormatn4() passed
TestCase foTest->testFormatn5() passed
TestCase foTest->testFormatn7() passed
TestCase foTest->testFormatn8() passed
TestCase foTest->testFormatn9() passed
TestCase foTest->testFormatn10() passed
TestCase foTest->testFormatn11() passed
TestCase foTest->testFormatn12() passed
TestCase foTest->testFormatn13() passed
TestCase foTest->testFormatn6() failed: expected TRUE, actual FALSE |
其中testFormatn6的測試失敗，
我們就可以去檢查一下我們的代碼在什么地方出問題了。
補(bǔ)充一點(diǎn)
也可以把a(bǔ)ssertTrue方法換assertEquals，如下：
| 代碼: |
function testFormatn6() {
$result = $this->abc->formatn("1343");
$expected = "1343";
$this->assertEquals($expected, $result);
}
|
如果失敗得到對應(yīng)的結(jié)果會(huì)直觀一些（可以顯示錯(cuò)誤的結(jié)果）：
| 代碼: |
TestCase foTest->testFormatn8() failed: expected 1343 , actual 134.
|
|
