Chapters/unit-testing-your-code/snippets.ps1
|
# to run the demos, you'll need to copy and paste each bit into the correct location. # or, use the StepX sample code folders and invoke Pester from there # simple function to test function Get-FileContents { [CmdletBinding()] Param( [Parameter(Mandatory=$True, ValueFromPipeline=$True)] [string[]]$Path ) PROCESS { foreach ($folder in $path) { Write-Verbose "Path is $folder" $segments = $folder -split "\\" $last = $segments[-1] Write-Verbose "Last path is $last" $filename = Join-Path $folder $last $filename += ".txt" Get-Content $filename } #foreach folder } #process } # basic tests file from New-Fixture $here = Split-Path -Parent $MyInvocation.MyCommand.Path $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' . "$here\$sut" Describe "Get-FileContents" { It "does something useful" { $true | Should Be $false } } # step 2 $here = Split-Path -Parent $MyInvocation.MyCommand.Path $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' . "$here\$sut" Describe "Get-FileContents" { MkDir TESTDRIVE:\Part1 MkDir TESTDRIVE\Part1\Part2 MkDir TESTDRIVE:\Part1\Part3 "sample" | Out-File TESTDRIVE:\Part1\Part2\Part2.txt "sample" | Out-File TESTDRIVE:\Part1\Part3\Part3.txt "sample" | Out-File TESTDRIVE:\Part1\Part1.txt It "does something useful" { $true | Should Be $false } } # basic test $here = Split-Path -Parent $MyInvocation.MyCommand.Path $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' . "$here\$sut" Describe "Get-FileContents" { MkDir TESTDRIVE:\Part1 MkDir TESTDRIVE\Part1\Part2 MkDir TESTDRIVE:\Part1\Part3 "sample" | Out-File TESTDRIVE:\Part1\Part2\Part2.txt "sample" | Out-File TESTDRIVE:\Part1\Part3\Part3.txt "sample" | Out-File TESTDRIVE:\Part1\Part1.txt It "reads part2.txt" { Get-FileContents -Path TESTDRIVE:\Part1\Part2 | Should Be "sample" } } # from within folder... Invoke-Pester # expand test... $here = Split-Path -Parent $MyInvocation.MyCommand.Path $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' . "$here\$sut" Describe "Get-FileContents" { MkDir TESTDRIVE:\Part1 MkDir TESTDRIVE:\Part1\Part2 MkDir TESTDRIVE:\Part1\Part3 "sample" | Out-File TESTDRIVE:\Part1\Part2\Part2.txt "sample" | Out-File TESTDRIVE:\Part1\Part3\Part3.txt "sample" | Out-File TESTDRIVE:\Part1\Part1.txt It "reads part2.txt" { Get-FileContents -Path TESTDRIVE:\Part1\Part2 | Should Be "sample" } It "reads part3.txt with fwd slashes" { Get-FileContents -PATH TESTDRIVE:/Part1/Part3 | Should Be "sample" } It "reads 3 files from the pipeline" { $results = "TESTDRIVE:\part1", "TESTDRIVE:\part1\part2", "TESTDRIVE:\part1\part3" | Get-FileContents $results.Count | Should Be 3 } } # and try it Invoke-Pester |