Testing RemoteOps.ps1 with Pester

RemoteOps.Tests.ps1

# RemoteOps.Tests.ps1

BeforeAll {
    . $PSScriptRoot\RemoteOps.ps1
    Mock Write-Log {}
    Mock Resolve-FullPath { $Path }
    Mock Get-Content { "Write-Output 'Test Script'" }
}

Describe "RemoteOps - Command Execution" {
    BeforeEach {
        Mock Invoke-Command {
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "Command executed successfully"
            }
        }
    }

    It "Executes a command on a single remote host" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process"
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
    }

    It "Executes a command on multiple remote hosts" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1","Server2" -Command "Get-Service"
        $result.Count | Should -Be 2
        $result[0].ComputerName | Should -Be "Server1"
        $result[1].ComputerName | Should -Be "Server2"
    }

    It "Handles command execution timeout" {
        Mock Invoke-Command { Start-Sleep -Seconds 10 }
        { .\RemoteOps.ps1 -ComputerName "SlowServer" -Command "Get-Process" -Timeout 5 } | Should -Throw "Operation timed out after 5 seconds"
    }

    It "Respects ThrottleLimit parameter" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1","Server2","Server3" -Command "Get-Process" -ThrottleLimit 2
        $result.Count | Should -Be 3
        Should -Invoke Invoke-Command -Times 1 -ParameterFilter { $ThrottleLimit -eq 2 }
    }
}

Describe "RemoteOps - Script Execution" {
    BeforeEach {
        Mock Invoke-Command {
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "Script executed successfully"
            }
        }
        Mock Test-Path { $true }
    }

    It "Executes a script on a remote host" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -ScriptPath "C:\Scripts\Test.ps1"
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
    }

    It "Executes a script with arguments" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -ScriptPath "C:\Scripts\Test.ps1" -ArgumentList @{Param1 = "Value1"; Param2 = "Value2"}
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
        Should -Invoke Invoke-Command -Times 1 -ParameterFilter { $ArgumentList[0].ArgumentList.Param1 -eq "Value1" }
    }

    It "Handles non-existent script file" {
        Mock Test-Path { $false }
        { .\RemoteOps.ps1 -ComputerName "Server1" -ScriptPath "C:\NonExistent.ps1" } | Should -Throw "Script file not found"
    }

    It "Handles relative script paths" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -ScriptPath ".\Test.ps1"
        $result.Status | Should -Be "Success"
        Should -Invoke Resolve-FullPath -Times 1 -ParameterFilter { $Path -eq ".\Test.ps1" }
    }
}

Describe "RemoteOps - Copy Operations" {
    BeforeEach {
        Mock Invoke-Command {
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "File/Directory copied successfully"
            }
        }
        Mock Test-Path { $true }
    }

    It "Copies a single file to a remote host" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Source "C:\LocalFile.txt" -Destination "C:\RemoteFolder"
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
    }

    It "Copies multiple files to a remote host" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Source "C:\File1.txt","C:\File2.txt" -Destination "C:\RemoteFolder"
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
        Should -Invoke Invoke-Command -Times 1 -ParameterFilter { $ArgumentList[0].Source.Count -eq 2 }
    }

    It "Copies a directory to a remote host" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Source "C:\LocalFolder" -Destination "C:\RemoteFolder"
        $result.ComputerName | Should -Be "Server1"
        $result.Status | Should -Be "Success"
    }

    It "Handles non-existent source path" {
        Mock Test-Path { $false }
        { .\RemoteOps.ps1 -ComputerName "Server1" -Source "C:\NonExistent" -Destination "C:\Remote" } | Should -Throw "Cannot find path"
    }

    It "Handles relative source paths" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Source ".\LocalFile.txt" -Destination "C:\RemoteFolder"
        $result.Status | Should -Be "Success"
        Should -Invoke Resolve-FullPath -Times 1 -ParameterFilter { $Path -eq ".\LocalFile.txt" }
    }
}

Describe "RemoteOps - Config File Handling" {
    BeforeEach {
        Mock Invoke-Command {
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "Operation completed"
            }
        }
        Mock Test-Path { $true }
        Mock Get-Content { @("Server1", "Server2", "Server3") }
    }

    It "Uses computers from config file" {
        $result = .\RemoteOps.ps1 -ConfigFile "C:\servers.txt" -Command "Get-Process"
        $result.Count | Should -Be 3
        $result[0].ComputerName | Should -Be "Server1"
        $result[1].ComputerName | Should -Be "Server2"
        $result[2].ComputerName | Should -Be "Server3"
    }

    It "Handles non-existent config file" {
        Mock Test-Path { $false }
        { .\RemoteOps.ps1 -ConfigFile "C:\NonExistent.txt" -Command "Get-Process" } | Should -Throw "Config file not found"
    }

    It "Handles empty config file" {
        Mock Get-Content { @() }
        { .\RemoteOps.ps1 -ConfigFile "C:\EmptyConfig.txt" -Command "Get-Process" } | Should -Throw "No valid hosts found in config file"
    }

    It "Handles relative config file path" {
        $result = .\RemoteOps.ps1 -ConfigFile ".\servers.txt" -Command "Get-Process"
        $result.Count | Should -Be 3
        Should -Invoke Resolve-FullPath -Times 1 -ParameterFilter { $Path -eq ".\servers.txt" }
    }
}

Describe "RemoteOps - Error Handling and Edge Cases" {
    BeforeEach {
        Mock Invoke-Command { throw "Remote execution failed" }
    }

    It "Handles remote execution errors" {
        $result = .\RemoteOps.ps1 -ComputerName "FailServer" -Command "Get-Process"
        $result.Status | Should -Be "Error"
        $result.Output | Should -BeLike "*Remote execution failed*"
    }

    It "Handles invalid parameter combinations" {
        { .\RemoteOps.ps1 -ComputerName "Server1" } | Should -Throw "Parameter set cannot be resolved"
    }

    It "Handles invalid ThrottleLimit" {
        { .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process" -ThrottleLimit 0 } | Should -Throw "Cannot validate argument on parameter 'ThrottleLimit'"
    }

    It "Handles invalid Timeout" {
        { .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process" -Timeout 0 } | Should -Throw "Cannot validate argument on parameter 'Timeout'"
    }

    It "Handles missing ComputerName and ConfigFile" {
        { .\RemoteOps.ps1 -Command "Get-Process" } | Should -Throw "No remote hosts specified"
    }
}

Describe "RemoteOps - DryRun Functionality" {
    It "Displays expected operations without executing them" {
        $output = .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process" -DryRun
        $output | Should -BeLike "*would execute command: Get-Process*"
    }

    It "Displays copy operations in dry run mode" {
        $output = .\RemoteOps.ps1 -ComputerName "Server1" -Source "C:\LocalFile.txt" -Destination "C:\RemoteFolder" -DryRun
        $output | Should -BeLike "*Would copy files/directories from C:\LocalFile.txt to C:\RemoteFolder on Server1*"
    }
}

Describe "RemoteOps - Output File Handling" {
    BeforeEach {
        Mock Invoke-Command {
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "Operation completed"
            }
        }
        Mock Export-Csv {}
    }

    It "Exports results to CSV file" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process" -OutputFile "results.csv"
        Should -Invoke Export-Csv -Times 1 -ParameterFilter { $Path -eq "results.csv" }
    }

    It "Handles relative output file path" {
        $result = .\RemoteOps.ps1 -ComputerName "Server1" -Command "Get-Process" -OutputFile ".\results.csv"
        Should -Invoke Resolve-FullPath -Times 1 -ParameterFilter { $Path -eq ".\results.csv" }
    }
}

Describe "RemoteOps - Parallel Execution" {
    It "Executes operations in parallel" {
        Mock Invoke-Command {
            Start-Sleep -Milliseconds 100
            [PSCustomObject]@{
                PSComputerName = $ComputerName
                Status = "Success"
                Output = "Operation completed"
            }
        }

        $start = Get-Date
        $result = .\RemoteOps.ps1 -ComputerName "Server1","Server2","Server3" -Command "Get-Process" -ThrottleLimit 3
        $end = Get-Date

        $duration = ($end - $start).TotalMilliseconds
        $duration | Should -BeLessThan 300
        $result.Count | Should -Be 3
    }
}