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26 changes: 24 additions & 2 deletions Pester.Tests.ps1
Original file line number Diff line number Diff line change
Expand Up @@ -119,8 +119,8 @@ Describe 'Style rules' {
$pesterRoot = (Get-Module Pester).ModuleBase

$files = @(
Get-ChildItem $pesterRoot -Include *.ps1,*.psm1
Get-ChildItem $pesterRoot\Functions -Include *.ps1,*.psm1 -Recurse
Get-ChildItem $pesterRoot\* -Include *.ps1,*.psm1
Get-ChildItem (Join-Path $pesterRoot 'Functions') -Include *.ps1,*.psm1 -Recurse
)

It 'Pester source files contain no trailing whitespace' {
Expand All @@ -146,6 +146,28 @@ Describe 'Style rules' {
}
}

It 'Spaces are used for indentation in all code files, not tabs' {
$badLines = @(
foreach ($file in $files)
{
$lines = [System.IO.File]::ReadAllLines($file.FullName)
$lineCount = $lines.Count

for ($i = 0; $i -lt $lineCount; $i++)
{
if ($lines[$i] -match '^[ ]*\t|^\t|^\t[ ]*') {
'File: {0}, Line: {1}' -f $file.FullName, ($i + 1)
}
}
}
)

if ($badLines.Count -gt 0)
{
throw "The following $($badLines.Count) lines start with a tab character: `r`n`r`n$($badLines -join "`r`n")"
}
}

It 'Pester Source Files all end with a newline' {
$badFiles = @(
foreach ($file in $files)
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