unit-testing - 简单的Powershell Pester测试不适用于$ false

Question

我编写了一个非常简单的函数“Check-RegValueExists”，当直接从命令提示符执行时，其工作原理如下

Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "DevicePath"

Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "Devicexxxx"

Check-RegValueExists "HKCU:\Software\Classes\message-facebook-com" "URL Protocol"

输出以下内容

True
False
False

这些都是 正确的结果。

我的瘟疫测试是

Describe 'Check-RegValueExists Tests'{

It "has valid key with valid value" {
        'Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "DevicePath"' | Should Be $true
        } 

It "has invalid key" {
        'Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "Devicexxxx"' | Should Be $false
        } 

It "has empty value" {
        'Check-RegValueExists "HKCU:\Software\Classes\message-facebook-com" "URL Protocol"' | Should Be $false
        } 

}

但是，只有第一个测试通过，而 其他两个通过以下测试，则失败

[-] has invalid key 17ms
   Expected: {False}
   But was:  {Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "Devicexxxx"}
   8:         'Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "Devicexxxx"' | Should Be $false
   at <ScriptBlock>, <No file>: line 8
 [-] has empty value 28ms
   Expected: {False}
   But was:  {Check-RegValueExists "HKCU:\Software\Classes\message-facebook-com" "URL Protocol"}
   12:         'Check-RegValueExists "HKCU:\Software\Classes\message-facebook-com" "URL Protocol"' | Should Be $false
   at <ScriptBlock>, <No file>: line 12

我什至复制并粘贴了第一个测试，并只修改了字符串以确认但仍然失败。是否存在语法错误或其他错误？

Answer 1

您的问题是因为您已将命令包装在单引号中，从而将它们转换为字符串。结果，您正在测试每个字符串是$ true还是$ false，是否将任何值都视为$ true。

您需要这样做:

Describe 'Check-RegValueExists Tests'{

    It "has valid key with valid value" {
        Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "DevicePath" | Should Be $true
    } 

    It "has invalid key" {
        Check-RegValueExists "HKLM:\Software\Microsoft\Windows\CurrentVersion" "Devicexxxx" | Should Be $false
    } 

    It "has empty value" {
        Check-RegValueExists "HKCU:\Software\Classes\message-facebook-com" "URL Protocol" | Should Be $false
    } 
}