Add method to extract extent from string

Author: Kapil Borle

Tests/PSScriptAnalyzerTestHelper.psm1

@@ -1,15 +1,21 @@
-Function Get-ExtentText
+Function Get-ExtentTextFromContent
 {
-	Param(
+	    Param(
 	[Microsoft.Windows.PowerShell.ScriptAnalyzer.Generic.CorrectionExtent] $violation,
-	[string] $scriptPath
+	[string] $rawContent
 	)
-	$scriptContent = Get-Content -Path $scriptPath
+	$scriptContent = New-Object -TypeName 'System.Collections.ArrayList'
+	$stringReader = New-Object -TypeName 'System.IO.StringReader' -ArgumentList @($rawContent)
+	while ($stringReader.Peek() -ne -1)
+	{
+		$scriptContent.Add($stringReader.ReadLine()) | Out-Null
+	}
+
 	$typeScriptPos = 'System.Management.Automation.Language.ScriptPosition'
 	$start = New-Object -TypeName $typeScriptPos -ArgumentList @($scriptPath, $violation.StartLineNumber, $violation.StartColumnNumber, $scriptContent[$violation.StartLineNumber - 1])
 	$end = New-Object -TypeName $typeScriptPos -ArgumentList @($scriptPath, $violation.EndLineNumber, $violation.EndColumnNumber, $scriptContent[$violation.EndLineNumber - 1])
 	$extent = New-Object -TypeName 'System.Management.Automation.Language.ScriptExtent' -ArgumentList @($start, $end)
-	return($extent.Text)
+	$extent.Text
 }
 
 Function Test-CorrectionExtent
@@ -21,10 +27,27 @@ Function Test-CorrectionExtent
 		[string] $violationText,
 		[string] $correctionText
 	)
+
+	Test-CorrectionExtentFromContent (Get-Content $violationFilepath -Raw) `
+		$diagnosticRecord `
+		$correctionsCount `
+		$violationText `
+		$correctionText
+}
+
+Function Test-CorrectionExtentFromContent {
+    param(
+        [string] $rawContent,
+        [Microsoft.Windows.PowerShell.ScriptAnalyzer.Generic.DiagnosticRecord] $diagnosticRecord,
+		[int] $correctionsCount,
+        [string] $violationText,
+        [string] $correctionText
+    )
+
 	$corrections = $diagnosticRecord.SuggestedCorrections
 	$corrections.Count | Should Be $correctionsCount
 	$corrections[0].Text | Should Be $correctionText
-	Get-ExtentText $corrections[0] $violationFilepath | `
+	Get-ExtentTextFromContent $corrections[0] $rawContent | `
 		       Should Be $violationText
 }
 
@@ -57,6 +80,7 @@ Function Get-Count
 
 Export-ModuleMember -Function Get-ExtentText
 Export-ModuleMember -Function Test-CorrectionExtent
+Export-ModuleMember -Function Test-CorrectionExtentFromContent
 Export-ModuleMember -Function Test-PSEditionCoreCLR
 Export-ModuleMember -Function Test-PSEditionCoreCLRLinux
 Export-ModuleMember -Function Test-PSVersionV3