豆子之前初步了解了Pester的基本功能，今天继续看看。Pester里面有个很重要的概念叫 assertion (断言），他的作用是通过Should这个关键字 （function）来定义预测应该出现的结果。
这个shoud后面的操作符有以下几种
-
Be
-
BeExactly
-
BeGreaterThan
-
BeLessThan
-
BeLike
-
BeLikeExactly
-
BeOfType
-
Exist
-
Contain
-
ContainExactly
-
Match
-
MatchExactly
-
Throw
-
BeNullOrEmpty
下面这个链接有相关的wiki说明，有兴趣的可以看看
https://github.com/pester/Pester/wiki/Should
这些关键字操作符从名字都能猜的出是干啥的，下面给几个实例看看怎么用。
比如在一个test.ps1里面写一个简单求和功能
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function add {
param(
[int]$a,
[int]$b
)$sum=$a+$b
$sum} |
对应的test.tests.ps1 里面这么写
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$here = Split-Path -Parent $MyInvocation.MyCommand.Path
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.'
. "$here\$sut"
Describe "Test" {
#Shoud Be 比较结果是否一样，不区分大小写Context "Should be test"{
It "Add 1 and 2 is equal to 3" {
add 1 2 | Should Be 3
}
It "Add -1 and 2 is not equal to 0" {
add -1 2 | Should not Be 0
}
}#should be Exactly 比较结果是否一样，区分大小写Context "Should BeExactly test"{
It "HostName" {
hostname | Should beexactly "yli-ise"
}
}#Should BeGreaterThan判断得到的结果是否比预定值大Context "Should BeGreaterThan test"{
It "PsVersion is above 3" {
$PSVersionTable.PSVersion.Major | Should beGreaterThan 3
}
}#Should beoftype判断结果类型是否为指定类型Context "Should beOfType test"{
It "Get-ADUser type"{
Get-aduser yli | Should beoftype Microsoft.ActiveDirectory.Management.ADUser
}
}#Should Exist判断文件是否存在Context "Should Exist test"{
It "C:\temp exist"{
"c:\temp" | should exist
}
}#Should match 判断结果是否匹配正则表达式， 不区分大小写Context "Should match test"{
It "Find Email"{
"jksjsjsjssdjs abc.xyz@yahoo.com hsosofs" | should match "[a-z0-9!#\$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#\$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?"
}
}#Should Throw 判断script block结果是否抛出异常Context "Should Throw test" {
It "Get a non-exist Process"{
{Get-Process -Name "!@#$%&" -ErrorAction Stop} | Should Throw
}
}#Should BeNulorEmpty 判断结果是否为空Context "Should BeNullorEmpty test"{
It "Get something from test folder"{
get-childitem C:\temp | should not benullorempty
}
}} |
直接运行这个测试文件或者通过Invoke-pester执行，看看结果 成功
本文转自 beanxyz 51CTO博客，原文链接：http://blog.51cto.com/beanxyz/1789850，如需转载请自行联系原作者