Formatting pester output to HTML document results in 'ClassID' cannot be found exception

[ChrisLynchHPE]

I just updated pester, Format-Pester and PScribo (versions are noted below) on my Windows 10 1703 system to the current versions posted in PowerShellGallery, and when using Format-Pester to output HTML results, the exception is generated:

[PS] C:\temp\pester> Format-Pester -PesterResult $Results -Path .\ -Format HTML
The property 'ClassId' cannot be found on this object. Verify that the property exists.
At line:247 char:17
+ ...             [ref] $null = $tocBuilder.AppendFormat('<h1 class="{0}">{ ...
+                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], PropertyNotFoundException
    + FullyQualifiedErrorId : PropertyNotFoundStrict

[PS] C:\temp\pester> $error[0] | fl * -force


PSMessageDetails      :
Exception             : System.Management.Automation.PropertyNotFoundException: The property 'ClassId' cannot be found
                        on this object. Verify that the property exists.
                           at System.Management.Automation.Language.PSGetMemberBinder.GetAdaptedValue(Object obj,
                        String member)
                           at CallSite.Target(Closure , CallSite , Object )
                           at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0)
                           at System.Management.Automation.Interpreter.DynamicInstruction`2.Run(InterpretedFrame frame)
                           at
                        System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame
                        frame)
TargetObject          :
CategoryInfo          : NotSpecified: (:) [], PropertyNotFoundException
FullyQualifiedErrorId : PropertyNotFoundStrict
ErrorDetails          :
InvocationInfo        : System.Management.Automation.InvocationInfo
ScriptStackTrace      : at OutHtmlTOC<Process>, <No file>: line 247
                        at OutHtml<Process>, <No file>: line 70
                        at Export-Document<Process>, <No file>: line 60
                        at Format-Pester, C:\Program
                        Files\WindowsPowerShell\Modules\Format-Pester\1.5.1\Public\Format-Pester.ps1: line 719
                        at <ScriptBlock>, <No file>: line 1
PipelineIterationInfo : {}

My pester test is just a very simple test that I wanted to validate nested contexts in a pester test run:

#pester nested context test with 4.0.3


describe "Nested Context Test with Pester 4.0.3" {

    context "Context #1" {

        it "will test foo" {

            'foo' | should be foo

        }

        context "nested contex 1" {

            it "will test foo again" {

                'foo' | should not be foo

            }

        }

    }
    
}

Output from Get-Module and $PSVersionTable:

[PS] C:\temp\pester> get-module

ModuleType Version    Name                                ExportedCommands
---------- -------    ----                                ----------------
Binary     1.0.0.0    CimCmdlets                          {Export-BinaryMiLog, Get-CimAssociatedInstance, Get-CimCla...
Script     1.5.1      Format-Pester                       Format-Pester
Manifest   3.1.0.0    Microsoft.PowerShell.Management     {Add-Computer, Add-Content, Checkpoint-Computer, Clear-Con...
Manifest   3.0.0.0    Microsoft.PowerShell.Security       {ConvertFrom-SecureString, ConvertTo-SecureString, Get-Acl...
Manifest   3.1.0.0    Microsoft.PowerShell.Utility        {Add-Member, Add-Type, Clear-Variable, Compare-Object...}
Manifest   3.0.0.0    Microsoft.WSMan.Management          {Connect-WSMan, Disable-WSManCredSSP, Disconnect-WSMan, En...
Script     4.0.3      pester                              {AfterAll, AfterEach, AfterEachFeature, AfterEachScenario...}
Script     0.7.17.75  pscribo                             {BlankLine, Document, DocumentOption, Export-Document...}
Script     1.0.0.13   PSReadline                          {Get-PSReadlineKeyHandler, Get-PSReadlineOption, Remove-PS...

[PS] C:\temp\pester> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      5.1.15063.413
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.15063.413
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

I even commented out the nested context section, and I still get the same exception above. Any ideas?

[it-praktyk]

@ChrisLynchHPE , thank you for your feedback. We will investigate it soon.

[it-praktyk]

PS >Invoke-Pester Desktop:\foo.test.ps1 -Quiet -PassThru | format-pester -DumpPScriboObject -Language en-us | select -ExpandProperty TOC

Id                    Number Level Name
--                    ------ ----- ----
RESULTSSUMMARY        1          0 Results summary
DETAILSFORFAILEDTESTS 2          0 Details for failed tests
DETAILSFORPASSEDTESTS 3          0 Details for passed tests


PS >Invoke-Pester Desktop:\foo.test.ps1 -Quiet -PassThru | format-pester -DumpPScriboObject -Language en-us | select -ExpandProperty SECTIONS

Id                                   Name                     Type
--                                   ----                     ----
7dbd5eec-1cc0-4707-bb6f-e82497f9804c Table of Contents        PScribo.TOC
RESULTSSUMMARY                       Results summary          PScribo.Section
DETAILSFORFAILEDTESTS                Details for failed tests PScribo.Section
DETAILSFORPASSEDTESTS                Details for passed tests PScribo.Section

[it-praktyk]

@ChrisLynchHPE , my first impression is that issue exits in the PScribo module. To investigate it I need to update Format-Pester - I've found errors in assigning parameters to 'DumpPScriboObjectParamSet' .

I hope that I'll finish it before Monday.

As I see even if error is displayed html file is generated correctly.

[it-praktyk]

It looks like resolved by iainbrighton/PScribo@9ab6faf .

CC: @iainbrighton

[iainbrighton]

@it-praktyk @equelin If that branch solves your issue, do I need to publish it to the PSGallery?

[it-praktyk]

I'll confirm it tonight.

[it-praktyk]

@iainbrighton, I tested Format-Pester with PScribo after iainbrighton/PScribo@9ab6faf. I can confirm that the issue reported by @ChrisLynchHPE is resolved - thank you.
I'm not sure an impact - even with displayed error messages html files were generated correctly (?). It's your decision about publishing the newer version of PScribo.

[it-praktyk]

@iainbrighton, do you have any plans to publish updated PScribo module soon? Thx.

[iainbrighton]

@it-praktyk I'll try and publish the dev branch to the Gallery later today or tomorrow 😄.

[it-praktyk]

Based on the README.md of PScribo it was corrected in the version 0.7.18.