PowerShell-PowerShell/test/powershell/Language/Scripting/NativeExecution/NativeMinishell.Tests.ps1

# Minishell is a powershell concept.
# It's primare use-case is when somebody executes a scriptblock in the new powershell process.
# The objects are automatically marshelled back to the parent session, so users can avoid custom
# serialization to pass objects between two processes.

Describe 'minishell for native executables' -Tag 'CI' {
	
    BeforeAll {
        $powershell = Join-Path -Path $PsHome -ChildPath "powershell"
    }

    Context 'Streams' {

        It 'gets a hashtable object from minishell' {
            $output = & $powershell { @{'a' = 'b'} }
            ($output | measure).Count | Should Be 1
            ($output.GetType().Name) | Should Be 'Hashtable'
            $output['a'] | Should Be 'b'
        }

        It 'gets the error stream from minishell' {
            $output = & $powershell { Write-Error 'foo' } 2>&1
            ($output | measure).Count | Should Be 1
            ($output.GetType().Name) | Should Be 'ErrorRecord'
            $output.FullyQualifiedErrorId | Should Be 'Microsoft.PowerShell.Commands.WriteErrorException'
        }

        It 'gets the information stream from minishell' {
            $output = & $powershell { Write-Information 'foo' } 6>&1
            ($output.GetType().Name) | Should Be 'InformationRecord'
            $output | Should Be 'foo'
        }
    }

    Context 'native commands lifecycle' {
        It "native | ps | native doesn't block" {
            $first = $true
            & $powershell -command '1..5 | % {Start-Sleep -mill 100; $_}' | %{$_} | & $powershell -command '$input' | % {
                if ($first)
                {
                    $first = $false
                    $firstTime = [datetime]::Now
                }
                $lastTime = [datetime]::Now
            }

            $lastTime - $firstTime | Should BeGreaterThan ([timespan]::new(0, 0, 0, 0, 100)) # 100 milliseconds
        }
    }
}