powershellpester

Pester 'It' or 'Context' array iteration

Pester 5.6.1 Powershell 7.4.5

Here's the deal. I have data that I am loading in the BeforeDiscovery. I can reference all the variables within at the Run stage...no problem there. Even the string arrays. What I cannot do...is loop over the string arrays. It just completely ignores them: enter image description here

The roles are definately there -> enter image description here

But it completely ignores the tests...it WILL break at tests that do not reference an array: enter image description here

Solution

  • All variables used with -ForEach has to be available in Discovery-phase, not just the source $account. Use a BeforeDiscovery-block inside the Describe to make $roles available. E.g.

    $c = New-PesterConfiguration
$c.Run.ScriptBlock = {
    BeforeDiscovery {
        $account = @{
            'name' = 'one'
            'roles' = @('web', 'db')
        }, @{
            'name'  = 'two'
            'roles' = @('app', 'file')
        }
    }
    Describe 'Account <name>' -ForEach $account {
        BeforeDiscovery {
            [string[]]$serverroles = $_.roles
        }
        Context 'Has role <_>' -ForEach $serverroles {
            It 'Test 1' {
                1 | Should -Be 1
            }
        }
    }
}
$c.Output.Verbosity = 'Detailed'
$c.Run.PassThru = $true
$r = Invoke-Pester -Configuration $c

# Output
Starting discovery in 1 files.
Discovery found 4 tests in 26ms.
Running tests.
Describing Account one
 Context Has role web
   [+] Test 1 6ms (1ms|4ms)
 Context Has role db
   [+] Test 1 3ms (1ms|1ms)

Describing Account two
 Context Has role app
   [+] Test 1 3ms (1ms|2ms)
 Context Has role file
   [+] Test 1 2ms (1ms|1ms)
Tests completed in 153ms
Tests Passed: 4, Failed: 0, Skipped: 0, Inconclusive: 0, NotRun: 0