我有一个专门处理异常并忽略它的实用程序函数,但是当用Pester测试时,测试失败,显示已经捕获和处理的异常。我错过了什么,或者这是Pester中的错误?
此代码重现了该问题:
function Test-FSPath {
[cmdletbinding()]
param([string]$FileSystemPath)
if([string]::IsNullOrWhiteSpace($FileSystemPath)) { return $false }
$result = $false
try {
if(Test-Path $FileSystemPath) {
Write-Debug "Verifying that $FileSystemPath is a file system path"
$item = Get-Item $FileSystemPath -ErrorAction Ignore
$result = ($item -ne $null) -and $($item.PSProvider.Name -eq 'FileSystem')
}
} catch {
# Path pattern that Test-Path / Get-Item can't handle
Write-Debug "Ignoring exception $($_.Exception.Message)"
}
return ($result -or ([System.IO.Directory]::Exists($FileSystemPath)) -or ([System.IO.File]::Exists($FileSystemPath)))
}
Describe 'Test' {
Context Test-FSPath {
It 'returns true for a path not supported by PowerShell Test-Path' {
$absPath = "$env:TEMP\temp-file[weird-chars.txt"
[System.IO.File]::WriteAllText($absPath, 'Hello world')
$result = Test-FSPath $absPath -Debug
$result | Should -Be $true
Write-Host "`$result = $result"
Remove-Item $absPath
}
}
}
预期结果:测试通过
实际结果:测试失败:
[-] returns true for a path not supported by PowerShell Test-Path 2.62s
WildcardPatternException: The specified wildcard character pattern is not valid: temp-file[weird-chars.txt
ParameterBindingException: Cannot retrieve the dynamic parameters for the cmdlet. The specified wildcard character pattern is not valid: temp-file[weird-chars.txt
答案 0 :(得分:1)
您看到的异常不是来自您的函数,而是来自您使用Remove-Item
,这会导致错误尝试删除错误路径(也不存在) 。你应该删除它,因为你永远不会想到要创建项目。
或者,或者(如评论中所述)使用TestDrive:然后您不必担心清理(似乎需要使用$Testdrive
支持的路径。)< / p>
It 'returns true for a path not supported by PowerShell Test-Path' {
$absPath = "$env:TEMP\temp-file[weird-chars.txt"
[System.IO.File]::WriteAllText($absPath, 'Hello world')
$result = Test-FSPath $absPath
$result | Should -Be $true
}
顺便说一句,我通常倾向于在It
之外执行执行类型的东西,而只是在里面测试结果。当我开始为你的代码执行此操作时,它向我显示测试正在通过,因为错误随后转移到Context
块中。这就是我的意思(此示例也通过$testdrive
变量使用TestDrive:):
Describe 'Test' {
Context Test-FSPath {
$absPath = "$testdrive\temp-file[weird-chars.txt"
[System.IO.File]::WriteAllText($absPath, 'Hello world')
$result = Test-FSPath $absPath
It 'returns true for a path not supported by PowerShell Test-Path' {
$result | Should -Be $true
}
}
}