Question

我想模拟一个.net汇编函数。我试图将.net函数包装在powershell函数中，但Pester仍然调用函数的原始实现---如何修复？这是我的考验：

    Describe "something" {
$result =(.$SomeScript)   <--- get modules loaded in memory 
Context "Happy Path" {
    it "Call mocked method 1x" {
        Mock  MyFunc{ "" }
        $result =$result =(& $SomeScript)

在SomeScript中，我有这样的实现：

function MyFunc($param1, $param2)
{
return [namespace.class]::function($param1, $param2)
}

Answer 1

在加载脚本文件之前，您正在制作Mock。结果是您覆盖模拟的函数。解决方案可以是制作包含这些功能的模块。然后加载模块并模拟模块中的函数。

Answer 2

让我举个例子来说明一下：

首先是你的包装文件：src\Do-Somethin.ps1

Function Get-Foobar() {
    Return "This is a sample text"
}

然后让我们看一下pester文件tests\Do-Something.Tests.ps1

#region HEADER
$here = Split-Path -Parent $MyInvocation.MyCommand.Path
# Keep in mind to adjust `.parent` method based on the directory level of the pester test file. 
$RepoRoot = (Get-Item -Path $here).Parent.FullName
$sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.'
$sut = $sut -replace "\d{2}`_", ''
$suthome = (Get-ChildItem -Path $RepoRoot -Exclude '.\tests\' -Filter $sut -Recurse).FullName

# Skip try loading the source file if it doesn't exists.
If ($suthome.Length -gt 0) {
    . $suthome
}
Else {
    Write-Warning ("Could not find source file {0}" -f $sut)
}
#endregion HEADER

Describe "Do-Something" {
    Context "Mocking part" {
        Mock Get-Foobar {
            "Some mocked text"
        }
        It "Test1" {
            $res = Get-Foobar
            Write-Host $res
            $res | Should Be "Some mocked text"
        }
    }
    Context "without mocking" {
        It "Test2" {
            $res = Get-Foobar
            Write-Host $res 
            $res | Should Be "This is a sample text"
        }
    }
}

然后最后运行Invoke-Pester .\tests。

所以你应该得到以下输出：

Describing Do-Something
   Context Mocking part
Some mocked text
    [+] Test1 81ms
   Context without mocking
This is a sample text
    [+] Test2 105ms
Tests completed in 186ms
Passed: 2 Failed: 0 Skipped: 0 Pending: 0 Inconclusive: 0

Pester没有调用模拟函数 - 我做错了什么？

2 个答案: