chore: add a Windows test on long path with git

build.ps1

@@ -16,7 +16,7 @@ Param(
     # Print the build and publish command instead of executing them if set
     [switch] $DryRun = $false,
     # Output debug info for tests: 'empty' (no additional test output), 'debug' (test cmd & stderr outputed), 'verbose' (test cmd, stderr, stdout outputed)
-    [String] $TestsDebug = ''
+    [String] $TestsDebug = 'verbose'
 )
 
 $ErrorActionPreference = 'Stop'

tests/agent.Tests.ps1

@@ -91,6 +91,13 @@ Describe "[$global:IMAGE_NAME] image has correct applications in the PATH" {
         $m.Groups['version'].ToString() | Should -Be "$global:GITLFSVERSION"
     }
 
+    It 'can use git with a long path' {
+        $longPath = 'C:\source\temp\' + ('a' * 260) + '\repo'
+        $repository = 'https://github.com/jenkinsci/pipeline-model-definition-plugin.git'
+        $exitCode, $stdout, $stderr = Run-Program 'docker' "exec $global:CONTAINERNAME $global:CONTAINERSHELL -C `"New-Item -ItemType Directory -Path ${longPath} ; cd ${longPath} ; & git init ; & git remote add origin $repository ; & git fetch origin ; & git checkout master`""
+        $exitCode | Should -Be 0
+    }
+
     It 'does not include jenkins-agent.ps1 (inbound-agent)' {
         $exitCode, $stdout, $stderr = Run-Program 'docker' "exec $global:CONTAINERNAME $global:CONTAINERSHELL -C `"if (Test-Path C:/ProgramData/Jenkins/jenkins-agent.ps1) { exit -1 } else { exit 0 }`""
         $exitCode | Should -Be 0