FixStacktraceLanguage

src/Pester.Runtime.ps1

@@ -58,6 +58,59 @@ $flags = [System.Reflection.BindingFlags]'Instance,NonPublic'
 $script:SessionStateInternalProperty = [System.Management.Automation.SessionState].GetProperty('Internal', $flags)
 $script:ScriptBlockSessionStateInternalProperty = [System.Management.Automation.ScriptBlock].GetProperty('SessionStateInternal', $flags)
 $script:ScriptBlockSessionStateProperty = [System.Management.Automation.ScriptBlock].GetProperty("SessionState", $flags)
+# function for extracting StacktraceSystemLanguage
+function Get-StackTraceLanguageFallBack {
+    param(
+        [Parameter(Mandatory = $true)]
+        [string]$StackTrace
+    )
+    $StackTraceLanguage = [PSCustomObject]@{
+        At   = "at"
+        Line = "line"
+    }
+    $Regex = "(?<At>.*)\s(?<ScriptBlockOrFunction>\<\w+\>),\s(?<FileName>\<.+\>)\s*:\s(?<Line>\w+)\s(?<LineNumber>\w+)\z"
+    if ($StackTrace -match $Regex) {
+        $StackTraceLanguage.At = $Matches["At"]
+        $StackTraceLanguage.Line = $Matches["Line"]
+    }
+    Return $StackTraceLanguage
+}
+
+function Get-StackTraceLanguage {
+    #Full fallback scenario to the solution of PR #2276 in case of error
+    try {
+        if ($PSVersionTable.PSVersion.Major -ge 5) {
+            if ($PSVersionTable.PSVersion.Major -gt 5) {
+                $StackTraceRessourceName = 'System.Management.Automation.resources.DebuggerStrings'
+            }
+            else {
+                $StackTraceRessourceName = 'DebuggerStrings'
+            }
+            $R = [System.Resources.ResourceManager]::new($StackTraceRessourceName, [System.Reflection.Assembly]::GetAssembly([System.Management.Automation.Breakpoint]))
+            $Result = $r.GetString('StackTraceFormat') -match '^(?<At>.*) \{0\}, \{1\}: (?<Line>.*) \{2\}$'
+            if (!($Result)) {
+                throw 'StackTraceFormat in a unknown format'
+            }
+            else {
+                $StackTraceLanguage = [PSCustomObject]@{
+                    At   = $Matches["At"]
+                    Line = $Matches["Line"]
+                }
+            }
+        }
+        else {
+            #Prior to version 5 there are no ressources in the Assembly available (System.Management.Automation)
+            throw 'Fallback for PSVersion 3/4'
+        }
+    }
+    catch {
+        #Call Fallbackfunction
+        $StackTraceLanguage = Get-StackTraceLanguageFallBack -StackTrace $($PSItem.ScriptStackTrace)
+    }
+    Return $StackTraceLanguage
+}
+#defining script variable
+$script:StackTraceLanguage = Get-StackTraceLanguage
 
 if (notDefined PesterPreference) {
     $PesterPreference = [PesterConfiguration]::Default

src/functions/Output.ps1

@@ -529,13 +529,13 @@ function ConvertTo-FailureLines {
         else {
             # omit the lines internal to Pester
             if ((GetPesterOS) -ne 'Windows') {
-                [String]$isPesterFunction = '^at .*, .*/Pester.psm1: line [0-9]*$'
-                [String]$isShould = '^at (Should<End>|Invoke-Assertion), .*/Pester.psm1: line [0-9]*$'
+                [String]$isPesterFunction = '^{0}.*, .*/Pester.psm1: {1} [0-9]*$' -f $script:StackTraceLanguage.At, $script:StackTraceLanguage.Line
+                [String]$isShould = '^{0} (Should<End>|Invoke-Assertion), .*/Pester.psm1: {1} [0-9]*$' -f $script:StackTraceLanguage.At, $script:StackTraceLanguage.Line
                 # [String]$pattern6 = '^at <ScriptBlock>, (<No file>|.*/Pester.psm1): line [0-9]*$'
             }
             else {
-                [String]$isPesterFunction = '^at .*, .*\\Pester.psm1: line [0-9]*$'
-                [String]$isShould = '^at (Should<End>|Invoke-Assertion), .*\\Pester.psm1: line [0-9]*$'
+                [String]$isPesterFunction = '^{0} .*, .*\\Pester.psm1: {1} [0-9]*$' -f $script:StackTraceLanguage.At, $script:StackTraceLanguage.Line
+                [String]$isShould = '^{0} (Should<End>|Invoke-Assertion), .*\\Pester.psm1: {1} [0-9]*$' -f $script:StackTraceLanguage.At, $script:StackTraceLanguage.Line
             }
 
             # PESTER_BUILD

src/functions/assertions/PesterThrow.ps1

@@ -153,7 +153,7 @@ function Get-DoValuesMatch($ActualValue, $ExpectedValue) {
 function Get-ExceptionLineInfo($info) {
     # $info.PositionMessage has a leading blank line that we need to account for in PowerShell 2.0
     $positionMessage = $info.PositionMessage -split '\r?\n' -match '\S' -join [System.Environment]::NewLine
-    return ($positionMessage -replace "^At ", "from ")
+    return ($positionMessage -replace "^$($script:StackTraceLanguage.At) ", "from ")
 }
 
 function ShouldThrowFailureMessage {