Reportgenerator: Generate Report for nodejs code coverage

[jjscaria]

Hello,

I am trying to generate report from cobertura coverage for a nodejs app. But, I am getting the following error:

##[error]Unable to locate executable file: 'dotnet'. Please verify either the file path exists or the file can be found within a directory specified by the PATH environment variable. Also check the file mode to verify the file is executable.

This is on Azure DevOps pipeline
Parameters:

Reports: <path/to>/cobertura-coverage.xml
Target Dir: coveragereport
Report types: HtmlInline_AzurePipelines;Cobertura

Any suggestion on how to fix this?

[danielpalme]

You need .NET Core to be available.
Just chose Hosted VS2017 as build agent type

See #204

[jjscaria]

That worked, thanks!
But, now the build is not showing Code Coverage tab.

Parameters for Publish code coverage:

Coverage tool: Cobertura
Summary file: coveragereport/Cobertura.xml
Report Dir: coveragereport

[jjscaria]

Output:

[command]/usr/bin/dotnet /home/lqscrane/Desktop/vsts-agent-cranetagz/_work/_tasks/reportgenerator_be803a55-9253-4895-a525-be570d86f161/1.0.20/tools/netcoreapp2.0/ReportGenerator.dll -reports:mean/**/**/coverage/cobertura-coverage.xml -targetdir:coveragereport -reporttypes:HtmlInline_AzurePipelines;Cobertura -sourcedirs: -historydir: -plugins: -assemblyfilters:+* -classfilters:+* -filefilters:+* -verbosity:Verbose -tag:54_#54
Loading report '/home/<path/to>/coverage/cobertura-coverage.xml' 1/2
 Preprocessing report
 Initiating parser for Cobertura
Loading report '/home/<path/to>/coverage/cobertura-coverage.xml' 2/2
 Preprocessing report
 Initiating parser for Cobertura
Coverage report parsing took 0.0 seconds
Initializing report builders for report types: HtmlInline_AzurePipelines, Cobertura
Analyzing 0 classes
 Creating summary
  Writing report file 'coveragereport/Cobertura.xml'
  Writing report file 'coveragereport/index.htm'
Report generation took 0.1 seconds

Looks like it is not reading the coverage files correctly.

Cobertura.xml file contents:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE coverage SYSTEM "http://cobertura.sourceforge.net/xml/coverage-04.dtd">
<coverage line-rate="1" branch-rate="1" lines-covered="0" lines-valid="0" branches-covered="0" branches-valid="0" complexity="NaN" version="0" timestamp="1549905609">
  <sources>
    <source>/home/<path/to>/project-src</source>
    <source>/home/<path/to>/project-src</source>
  </sources>
  <packages />
</coverage>

I tried disabling and enabling boards but that didnt work.

[danielpalme]

There are several issues:

• Your _Cobertura_ file is basically empty and does not contain any coverage information. Therefore the report generated by _ReportGenerator_ does not contain any meaningful results.
• To see the _coverage_ tab, you have to publish the coverage files using the _Publish Code Coverage Results_ task (Edit: You already did this)
• Enabling _boards_ should not be necessary any more, but just try it with _board_ enabled first.

[jjscaria]

• The Cobertura file is supposed to be a combination of multiple xmls from ReportGenerator config. The files that are supposed to be combined has all the data in there. Not sure why they are not being combined.
  I also tried to use a single xml to be added to the report, but Cobertura.xml came out just like above with only source dir. Packages block is not getting added to the final xml
• Boards was already enabled/in-use. So, I executed the pipeline after disabling and re-enabling.

[danielpalme]

I don't know why the coverage tab is not visible.

But if you like you can share one of your Cobertura files, then I can check why the output of _ReportGenerator_ is empty.

[jjscaria]

Here is one of them
https://gist.github.com/jjscaria/f6809fe26176ee82d26e2d562a2c2d44

[danielpalme]

Which tool do you use to generate the initial _Coberatura_ files?
The file you posted is invalid.

The <packages> element has to contain a <package> element and the package element should contain the class elements.

See DTD: http://cobertura.sourceforge.net/xml/coverage-04.dtd

[jjscaria]

Im using Jest for code coverage.

[danielpalme]

And _Jest_ seems to use _instanbul_.

See also these issues:
https://github.com/danielpalme/ReportGenerator/issues/192
https://github.com/istanbuljs/istanbuljs/issues/14
https://github.com/istanbuljs/nyc/issues/965

[jjscaria]

Oh ok. I guess I will follow those threads.
Thank you so much for taking the time to help with this issue.

[danielpalme]

The coverage tab will probably show up as soon as the _Cobertura_ file is valid.

[jjscaria]

@danielpalme whats the value for Jacoco report type? I dont see it on ReadMe.

[danielpalme]

@jjscaria
I'm not sure if I understand your question correctly.
ReportGenerator also supports the JaCoCo format and it's mentioned in the readme:
https://github.com/danielpalme/ReportGenerator#file-formats

[danielpalme]

The latest release now supports handling those invalid files:
https://www.nuget.org/packages/ReportGenerator/4.0.12

The Azure DevOps extension is also updated. So your build should work now (it may take some time until the new version is used in your build, version number is: 1.0.21)

[jjscaria]

@danielpalme Report works now. Thank you so much for the update!