我想测试一个函数是否成功,但是也要在失败时抛出正确的错误。
我写了一个函数Test-URLconnection
,该函数应该测试URL是否可访问,否则将引发错误。
Describe 'Test-URLconnection'{
$Error.Clear()
$countCases = @(
@{'url' = 'www.google.com'}
@{'url' = 'www.facebook.com'}
@{'url' = 'www.bbc.com'}
)
It "The URL status should be confirmed." -TestCases $countCases {
param($url)
if ([bool](test-URLconnection -URL $url -ErrorAction SilentlyContinue)) {
test-URLconnection -URL $url | Should -Be "$url = OK"
}
else {
$Error[0].Exception.Message | Should -Be "$url cannot be accessed."
}
}
}
我希望这两个测试能够通过,因为即使无法通过Invoke-WebRequest
(我在Test-URLconnection
中使用的命令)访问Facebook,它也应该被else语句捕获了。
这是控制台输出:
Describing Test-URLconnection
[+] The URL status should be confirmed. 319ms
[-] The URL status should be confirmed. 278ms
HttpException: www.facebook.com cannot be accessed.
at test-URLconnection<Begin>, <No file>: line 51
at <ScriptBlock>, PATH: line 15
[+] The URL status should be confirmed. 556ms
Tests completed in 1.54s
Tests Passed: 2, Failed: 1, Skipped: 0, Pending: 0, Inconclusive: 0
有人可以在Pester中使用if / else语句吗?
答案 0 :(得分:0)
我遵循Mark Wragg的建议,并使用以下代码创建了单独的上下文来测试错误。
Context "Test cases which fail" {
$Error.Clear()
$countCases = @(
@{'url' = 'www.asdfasf.com'}
@{'url' = 'www.facebook.com'}
)
It "The correct Error message should be thrown" -TestCases $countCases{
param($url)
{ test-URLconnection -URL $url } | Should -Throw -ExceptionType ([System.Web.HttpException])
}
}
一个小提示,我在ExceptionType捕获方面颇为挣扎。请记住将函数包装在花括号中。否则,这对我来说是失败的。