Windows-powershell / PowerShell-master /test /powershell /Language /Scripting /CleanBlockErrorHandling.Tests.ps1
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# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
Describe "Error handling within a single 'Clean' block" -Tag 'CI' {
BeforeAll {
function ErrorInClean {
[CmdletBinding()]
param(
[switch] $ThrowTerminatingError,
[switch] $ErrorActionStop,
[switch] $ThrowException,
[switch] $WriteErrorAPI,
[switch] $WriteErrorCmdlet,
[switch] $MethodInvocationThrowException,
[switch] $ExpressionThrowException
)
End { <# use an empty end block to allow the clean block to actually run #> }
clean {
if ($ThrowTerminatingError) {
$ex = [System.ArgumentException]::new('terminating-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'ThrowTerminatingError:error', 'InvalidArgument', $null)
$PSCmdlet.ThrowTerminatingError($er)
Write-Verbose -Verbose "verbose-message"
}
elseif ($ErrorActionStop) {
Get-Command NonExist -ErrorAction Stop
Write-Verbose -Verbose "verbose-message"
}
elseif ($ThrowException) {
throw 'throw-exception'
Write-Verbose -Verbose "verbose-message"
}
elseif ($WriteErrorAPI) {
$ex = [System.ArgumentException]::new('arg-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'WriteErrorAPI:error', 'InvalidArgument', $null)
$PSCmdlet.WriteError($er)
Write-Verbose -Verbose "verbose-message"
}
elseif ($WriteErrorCmdlet) {
Write-Error 'write-error-cmdlet'
Write-Verbose -Verbose "verbose-message"
}
elseif ($MethodInvocationThrowException) {
## This method call throws exception.
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose "verbose-message"
}
elseif ($ExpressionThrowException) {
1/0 ## throw exception.
Write-Verbose -Verbose "verbose-message"
}
}
}
function ErrorInEnd {
[CmdletBinding()]
param(
[switch] $ThrowTerminatingError,
[switch] $ErrorActionStop,
[switch] $ThrowException,
[switch] $WriteErrorAPI,
[switch] $WriteErrorCmdlet,
[switch] $MethodInvocationThrowException,
[switch] $ExpressionThrowException
)
if ($ThrowTerminatingError) {
$ex = [System.ArgumentException]::new('terminating-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'ThrowTerminatingError:error', 'InvalidArgument', $null)
$PSCmdlet.ThrowTerminatingError($er)
Write-Verbose -Verbose "verbose-message"
}
elseif ($ErrorActionStop) {
Get-Command NonExist -ErrorAction Stop
Write-Verbose -Verbose "verbose-message"
}
elseif ($ThrowException) {
throw 'throw-exception'
Write-Verbose -Verbose "verbose-message"
}
elseif ($WriteErrorAPI) {
$ex = [System.ArgumentException]::new('arg-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'WriteErrorAPI:error', 'InvalidArgument', $null)
$PSCmdlet.WriteError($er)
Write-Verbose -Verbose "verbose-message"
}
elseif ($WriteErrorCmdlet) {
Write-Error 'write-error-cmdlet'
Write-Verbose -Verbose "verbose-message"
}
elseif ($MethodInvocationThrowException) {
## This method call throws exception.
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose "verbose-message"
}
elseif ($ExpressionThrowException) {
1/0 ## throw exception.
Write-Verbose -Verbose "verbose-message"
}
}
function DivideByZeroWrappedInTry {
[CmdletBinding()]
param()
end {}
clean {
try {
1/0
Write-Verbose -Verbose 'clean'
}
catch { Write-Verbose -Verbose $_.Exception.InnerException.GetType().FullName }
}
}
function ArgumentNullWrappedInTry {
[CmdletBinding()]
param()
end {}
clean {
try {
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose 'clean'
}
catch { Write-Verbose -Verbose $_.Exception.InnerException.GetType().FullName }
}
}
function DivideByZeroWithTrap {
[CmdletBinding()]
param()
end {}
clean {
trap {
Write-Verbose -Verbose $_.Exception.GetType().FullName
continue
}
1/0
Write-Verbose -Verbose 'clean'
}
}
function ArgumentNullWithTrap {
[CmdletBinding()]
param()
end {}
clean {
trap {
Write-Verbose -Verbose $_.Exception.GetType().FullName
continue
}
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose 'clean'
}
}
#region Helper
$pwsh = [PowerShell]::Create()
$text = (Get-Command ErrorInClean).ScriptBlock.Ast.Extent.Text
$pwsh.AddScript($text).Invoke()
$pwsh.Commands.Clear()
$text = (Get-Command ErrorInEnd).ScriptBlock.Ast.Extent.Text
$pwsh.AddScript($text).Invoke()
function RunCommand {
param(
[ValidateSet('ErrorInClean', 'ErrorInEnd')]
[string] $Command,
[ValidateSet('ThrowTerminatingError', 'ErrorActionStop', 'ThrowException', 'WriteErrorAPI',
'WriteErrorCmdlet', 'MethodInvocationThrowException', 'ExpressionThrowException')]
[string] $ParamNameToUse,
[ValidateSet('Continue', 'Ignore', 'SilentlyContinue', 'Stop')]
[string] $ErrorAction
)
$pwsh.Commands.Clear()
$pwsh.Streams.ClearStreams()
$pwsh.AddCommand($Command).AddParameter($ParamNameToUse, $true) > $null
if ($ErrorAction) { $pwsh.AddParameter('ErrorAction', $ErrorAction) > $null }
$pwsh.Invoke()
}
function RunScript {
param([string] $Script)
$pwsh.Commands.Clear()
$pwsh.Streams.ClearStreams()
$pwsh.AddScript($Script).Invoke()
}
function GetLastError {
$pwsh.Commands.Clear()
$pwsh.AddCommand('Get-Error').Invoke()
}
function ClearDollarError {
$pwsh.Commands.Clear()
$pwsh.AddScript('$Error.Clear()').Invoke()
}
#endregion
}
AfterAll {
$pwsh.Dispose()
}
It "Terminating error should stop the 'Clean' block execution but should not be propagated up" {
## 'ThrowTerminatingException' stops the execution within the 'Clean' block, but the error doesn't get
## propagated out of the 'Clean' block. Instead, the error is written to the 'ErrorOutput' pipe.
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'ThrowTerminatingError'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'terminating-exception'
## 'throw' statement stops the execution within the 'Clean' block by default, but the error doesn't get
## propagated out of the 'Clean' block. Instead, the error is written to the 'ErrorOutput' pipe.
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'ThrowException'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'throw-exception'
## '-ErrorAction Stop' stops the execution within the 'Clean' block, but the error doesn't get propagated
## out of the 'Clean' block. Instead, the error is written to the 'ErrorOutput' pipe.
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'ErrorActionStop'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].FullyQualifiedErrorId | Should -BeExactly 'CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand'
## Turn non-terminating errors into terminating by '-ErrorAction Stop' explicitly.
## Execution within the 'Clean' block should be stopped. The resulted terminating error should not get
## propagated, but instead should be written to 'ErrorOutput' pipe.
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'WriteErrorAPI' -ErrorAction Stop
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'arg-exception'
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'WriteErrorCmdlet' -ErrorAction Stop
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'write-error-cmdlet'
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'MethodInvocationThrowException' -ErrorAction Stop
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
RunCommand -Command 'ErrorInClean' -ParamNameToUse 'ExpressionThrowException' -ErrorAction Stop
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
}
It "Terminating error should set `$? correctly" {
RunScript -Script 'ErrorInClean -ThrowTerminatingError; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -ThrowException; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -ErrorActionStop; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -WriteErrorAPI -ErrorAction Stop; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -WriteErrorCmdlet -ErrorAction Stop; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -MethodInvocationThrowException -ErrorAction Stop; $?' | Should -BeFalse
RunScript -Script 'ErrorInClean -ExpressionThrowException -ErrorAction Stop; $?' | Should -BeFalse
}
It "Track the `$? behavior for non-terminating errors within 'Clean' and 'End' blocks" {
RunScript -Script 'ErrorInClean -WriteErrorAPI; $?' | Should -BeFalse
RunScript -Script 'ErrorInEnd -WriteErrorAPI; $?' | Should -BeFalse
## The 'Write-Error' is specially weird, in that when a command emits error because of 'Write-Error' within it,
## the following '$?' won't reflect '$false', but will be '$true'.
## Frankly, this is counter-intuitive, but it's the existing behavior. The tests below just keeps track of this
## behavior. Feel free to change this test if someone is fixing this seemingly wrong behavior.
RunScript -Script 'ErrorInClean -WriteErrorCmdlet; $?' | Should -BeTrue
RunScript -Script 'ErrorInEnd -WriteErrorCmdlet; $?' | Should -BeTrue
## Similarly, when a command emits error because of a method invocation within it throws an exception,
## the following '$?' won't reflect '$false', but will be '$true'.
## Again, this seems wrong, but it's the existing behavior. The tests below just keeps track of this
## behavior. Feel free to change this test if someone is fixing this seemingly wrong behavior.
RunScript -Script 'ErrorInClean -MethodInvocationThrowException; $?' | Should -BeTrue
RunScript -Script 'ErrorInEnd -MethodInvocationThrowException; $?' | Should -BeTrue
## Again, when a command emits error because of an expression within it throws an exception,
## the following '$?' won't reflect '$false', but will be '$true'.
## This seems wrong, but it's the existing behavior. The tests below just keeps track of this
## behavior. Feel free to change this test if someone is fixing this seemingly wrong behavior.
RunScript -Script 'ErrorInClean -ExpressionThrowException; $?' | Should -BeTrue
RunScript -Script 'ErrorInEnd -ExpressionThrowException; $?' | Should -BeTrue
}
It "Non-terminating error within 'Clean' block should act based on ErrorActionPreference: <ParamName> - Continue" -TestCases @(
@{ ParamName = 'WriteErrorAPI'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'arg-exception' } }
@{ ParamName = 'WriteErrorCmdlet'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'write-error-cmdlet' } }
@{ ParamName = 'MethodInvocationThrowException'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
) {
param($ParamName, $AssertScript)
RunCommand -Command 'ErrorInClean' -ParamNameToUse $ParamName
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
& $AssertScript $pwsh.Streams.Error[0]
}
It "Non-terminating error within 'End' block should act based on ErrorActionPreference: <ParamName> - Continue" -TestCases @(
@{ ParamName = 'WriteErrorAPI'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'arg-exception' } }
@{ ParamName = 'WriteErrorCmdlet'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'write-error-cmdlet' } }
@{ ParamName = 'MethodInvocationThrowException'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
) {
param($ParamName, $AssertScript)
RunCommand -Command 'ErrorInEnd' -ParamNameToUse $ParamName
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
& $AssertScript $pwsh.Streams.Error[0]
}
It "Non-terminating error within 'Clean' block should act based on ErrorActionPreference: <ParamName> - <Action>" -TestCases @(
### When error action is 'Ignore', non-terminating errors emitted by 'WriteErrorAPI' and 'WriteErrorCmdlet' are not captured in $Error,
### but non-terminating errors emitted by method exception or expression exception are captured in $Error.
### This inconsistency is surprising, but it's the existing behavior -- same in other named blocks.
@{ ParamName = 'WriteErrorAPI'; Action = 'Ignore'; AssertScript = $null }
@{ ParamName = 'WriteErrorCmdlet'; Action = 'Ignore'; AssertScript = $null }
@{ ParamName = 'MethodInvocationThrowException'; Action = 'Ignore'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; Action = 'Ignore'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
@{ ParamName = 'WriteErrorAPI'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'arg-exception' } }
@{ ParamName = 'WriteErrorCmdlet'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'write-error-cmdlet' } }
@{ ParamName = 'MethodInvocationThrowException'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
) {
param($ParamName, $Action, $AssertScript)
ClearDollarError
RunCommand -Command 'ErrorInClean' -ParamNameToUse $ParamName -ErrorAction $Action
$pwsh.Streams.Error.Count | Should -Be 0
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$lastErr = GetLastError
if ($null -eq $AssertScript) {
$lastErr | Should -BeNullOrEmpty
} else {
$lastErr | Should -Not -BeNullOrEmpty
& $AssertScript $lastErr
}
}
### These tests are targeting 'End' block but with the same settings as the ones right above.
### They are used as a comparison to prove the consistent behavior in 'End' and 'Clean'.
It "Non-terminating error within 'End' block should act based on ErrorActionPreference: <ParamName> - <Action>" -TestCases @(
@{ ParamName = 'WriteErrorAPI'; Action = 'Ignore'; AssertScript = $null }
@{ ParamName = 'WriteErrorCmdlet'; Action = 'Ignore'; AssertScript = $null }
@{ ParamName = 'MethodInvocationThrowException'; Action = 'Ignore'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; Action = 'Ignore'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
@{ ParamName = 'WriteErrorAPI'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'arg-exception' } }
@{ ParamName = 'WriteErrorCmdlet'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.Message | Should -BeExactly 'write-error-cmdlet' } }
@{ ParamName = 'MethodInvocationThrowException'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.ArgumentNullException' } }
@{ ParamName = 'ExpressionThrowException'; Action = 'SilentlyContinue'; AssertScript = { param($err) $err.Exception.InnerException | Should -BeOfType 'System.DivideByZeroException' } }
) {
param($ParamName, $Action, $AssertScript)
ClearDollarError
RunCommand -Command 'ErrorInEnd' -ParamNameToUse $ParamName -ErrorAction $Action
$pwsh.Streams.Error.Count | Should -Be 0
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$lastErr = GetLastError
if ($null -eq $AssertScript) {
$lastErr | Should -BeNullOrEmpty
} else {
$lastErr | Should -Not -BeNullOrEmpty
& $AssertScript $lastErr
}
}
It "'try/catch' and 'trap' should turn general exception thrown from method/expression into terminating error within 'Clean' block. ErrorAction: <ErrorAction>" -TestCases @(
@{ ErrorAction = 'Continue' }
@{ ErrorAction = 'Ignore' }
@{ ErrorAction = 'SilentlyContinue' }
) {
param($ErrorAction)
$verbose = DivideByZeroWrappedInTry -ErrorAction $ErrorAction 4>&1
$verbose.Count | Should -Be 1
$verbose.Message | Should -BeExactly 'System.DivideByZeroException'
$verbose = ArgumentNullWrappedInTry -ErrorAction $ErrorAction 4>&1
$verbose.Count | Should -Be 1
$verbose.Message | Should -BeExactly 'System.ArgumentNullException'
$verbose = DivideByZeroWithTrap -ErrorAction $ErrorAction 4>&1
$verbose.Count | Should -Be 2
$verbose[0].Message | Should -BeExactly 'System.DivideByZeroException'
$verbose[1].Message | Should -BeExactly 'clean'
$verbose = ArgumentNullWithTrap -ErrorAction $ErrorAction 4>&1
$verbose.Count | Should -Be 2
$verbose[0].Message | Should -BeExactly 'System.ArgumentNullException'
$verbose[1].Message | Should -BeExactly 'clean'
}
It "'try/catch' and 'trap' outside the command should NOT affect general exception thrown from method/expression in the 'Clean' block" {
## The catch block should not run
RunScript -Script "try { ErrorInClean -MethodInvocationThrowException } catch { Write-Debug -Debug 'caught-something' }"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Debug.Count | Should -Be 0
## The catch block should not run
RunScript -Script "try { ErrorInClean -ExpressionThrowException } catch { Write-Debug -Debug 'caught-something' }"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Debug.Count | Should -Be 0
## The trap block should not run
RunScript -Script "trap { Write-Debug -Debug 'caught-something'; continue } ErrorInClean -MethodInvocationThrowException"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Debug.Count | Should -Be 0
## The trap block should not run
RunScript -Script "trap { Write-Debug -Debug 'caught-something'; continue } ErrorInClean -ExpressionThrowException"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Debug.Count | Should -Be 0
}
It "'try/catch' and 'trap' outside the command should NOT affect 'throw' statement in the 'Clean' block. ErrorAction: <ErrorAction>" -TestCases @(
@{ ErrorAction = 'Ignore' }
@{ ErrorAction = 'SilentlyContinue' }
) {
param ($ErrorAction)
## 'throw' statement should be suppressed by 'Ignore' or 'SilentlyContinue' within a 'Clean' block,
## even if the command is wrapped in try/catch.
RunScript -Script "try { ErrorInClean -ThrowException -ErrorAction $ErrorAction } catch { Write-Debug -Debug 'caught-something' }"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
## Nothing written to error stream
$pwsh.Streams.Error.Count | Should -Be 0
## Nothing written to debug stream
$pwsh.Streams.Debug.Count | Should -Be 0
## The suppressed 'throw' exception is kept in '$Error'
$err = GetLastError
$err | Should -Not -BeNullOrEmpty
$err.FullyQualifiedErrorId | Should -BeExactly 'throw-exception'
## 'throw' statement should be suppressed by 'Ignore' or 'SilentlyContinue' within a 'Clean' block,
## even if the command is accompanied by 'trap'.
RunScript -Script "trap { Write-Debug -Debug 'caught-something'; continue } ErrorInClean -ThrowException -ErrorAction $ErrorAction"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'verbose-message'
## Nothing written to error stream
$pwsh.Streams.Error.Count | Should -Be 0
## Nothing written to debug stream
$pwsh.Streams.Debug.Count | Should -Be 0
## The suppressed 'throw' exception is kept in '$Error'
$err = GetLastError
$err | Should -Not -BeNullOrEmpty
$err.FullyQualifiedErrorId | Should -BeExactly 'throw-exception'
}
It "Error out-variable should work for the 'Clean' block" {
## Terminating errors thrown from 'Clean' block are captured and written to the error pipe.
## Here we redirect the error pipe to discard the error stream, so the error doesn't pollute
## the test output.
ErrorInClean -ThrowTerminatingError -ErrorVariable err 2>&1 > $null
$err.Count | Should -Be 1
$err[0].Message | Should -BeExactly 'terminating-exception'
## $err.Count is 3 in this case. It's the same for other named blocks too.
## This looks like an existing bug because $err.Count should be 1 since only 1 error happened.
## Opened issue https://github.com/PowerShell/PowerShell/issues/15739
ErrorInClean -ErrorActionStop -ErrorVariable err 2>&1 > $null
$err[0] | Should -BeOfType 'System.Management.Automation.ActionPreferenceStopException'
## $err.Count is 2 in this case. It's the same for other named blocks too.
## Similarly, this looks like an existing bug and $err.Count should be 1.
## This is tracked by the same issue above.
ErrorInClean -ThrowException -ErrorVariable err 2>&1 > $null
$err[0].Exception.Message | Should -BeExactly 'throw-exception'
ErrorInClean -WriteErrorAPI -ErrorVariable err *>&1 > $null
$err.Count | Should -Be 1
$err[0].Exception.Message | Should -BeExactly 'arg-exception'
ErrorInClean -WriteErrorCmdlet -ErrorVariable err *>&1 > $null
$err.Count | Should -Be 1
$err[0].Exception.Message | Should -BeExactly 'write-error-cmdlet'
ErrorInClean -MethodInvocationThrowException -ErrorVariable err *>&1 > $null
$err.Count | Should -Be 1
$err[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
ErrorInClean -ExpressionThrowException -ErrorVariable err *>&1 > $null
$err.Count | Should -Be 1
$err[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
}
}
Describe "Multiple errors from 'Clean' and another named block" -Tag 'CI' {
BeforeAll {
function MultipleErrors {
[CmdletBinding()]
param(
[ValidateSet('ThrowTerminatingError', 'ErrorActionStop', 'ThrowException', 'WriteErrorAPI',
'WriteErrorCmdlet', 'MethodInvocationThrowException', 'ExpressionThrowException')]
[Parameter(Mandatory)]
[string] $ErrorFromEndBlock,
[ValidateSet('ThrowTerminatingError', 'ErrorActionStop', 'ThrowException', 'WriteErrorAPI',
'WriteErrorCmdlet', 'MethodInvocationThrowException', 'ExpressionThrowException')]
[Parameter(Mandatory)]
[string] $ErrorFromCleanBlock
)
End {
switch ($ErrorFromEndBlock) {
'ThrowTerminatingError' {
$ex = [System.ArgumentException]::new('end-terminating-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'ThrowTerminatingError:end-error', 'InvalidArgument', $null)
$PSCmdlet.ThrowTerminatingError($er)
Write-Verbose -Verbose "end-verbose-message"
}
'ErrorActionStop' {
Get-Command NonExistEnd -ErrorAction Stop
Write-Verbose -Verbose "end-verbose-message"
}
'ThrowException' {
throw 'end-throw-exception'
Write-Verbose -Verbose "end-verbose-message"
}
'WriteErrorAPI' {
$ex = [System.ArgumentException]::new('end-arg-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'WriteErrorAPI:end-error', 'InvalidArgument', $null)
$PSCmdlet.WriteError($er)
Write-Verbose -Verbose "end-verbose-message"
}
'WriteErrorCmdlet' {
Write-Error 'end-write-error-cmdlet'
Write-Verbose -Verbose "end-verbose-message"
}
'MethodInvocationThrowException' {
## This method call throws exception.
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose "end-verbose-message"
}
'ExpressionThrowException' {
1/0 ## throw exception.
Write-Verbose -Verbose "end-verbose-message"
}
}
}
clean {
switch ($ErrorFromCleanBlock) {
'ThrowTerminatingError' {
$ex = [System.ArgumentException]::new('clean-terminating-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'ThrowTerminatingError:clean-error', 'InvalidArgument', $null)
$PSCmdlet.ThrowTerminatingError($er)
Write-Verbose -Verbose "clean-verbose-message"
}
'ErrorActionStop' {
Get-Command NonExistClean -ErrorAction Stop
Write-Verbose -Verbose "clean-verbose-message"
}
'ThrowException' {
throw 'clean-throw-exception'
Write-Verbose -Verbose "clean-verbose-message"
}
'WriteErrorAPI' {
$ex = [System.ArgumentException]::new('clean-arg-exception')
$er = [System.Management.Automation.ErrorRecord]::new($ex, 'WriteErrorAPI:clean-error', 'InvalidArgument', $null)
$PSCmdlet.WriteError($er)
Write-Verbose -Verbose "clean-verbose-message"
}
'WriteErrorCmdlet' {
Write-Error 'clean-write-error-cmdlet'
Write-Verbose -Verbose "clean-verbose-message"
}
'MethodInvocationThrowException' {
## This method call throws exception.
$iss = [initialsessionstate]::Create()
$iss.ImportPSModule($null)
Write-Verbose -Verbose "clean-verbose-message"
}
'ExpressionThrowException' {
1/0 ## throw exception.
Write-Verbose -Verbose "clean-verbose-message"
}
}
}
}
#region Helper
$pwsh = [PowerShell]::Create()
$text = (Get-Command MultipleErrors).ScriptBlock.Ast.Extent.Text
$pwsh.AddScript($text).Invoke()
function RunCommand {
param(
[ValidateSet('MultipleErrors')]
[string] $Command,
[ValidateSet('ThrowTerminatingError', 'ErrorActionStop', 'ThrowException', 'WriteErrorAPI',
'WriteErrorCmdlet', 'MethodInvocationThrowException', 'ExpressionThrowException')]
[string] $ErrorFromEndBlock,
[ValidateSet('ThrowTerminatingError', 'ErrorActionStop', 'ThrowException', 'WriteErrorAPI',
'WriteErrorCmdlet', 'MethodInvocationThrowException', 'ExpressionThrowException')]
[string] $ErrorFromCleanBlock,
[ValidateSet('Continue', 'Ignore', 'SilentlyContinue', 'Stop')]
[string] $ErrorAction
)
$pwsh.Commands.Clear()
$pwsh.Streams.ClearStreams()
$pwsh.AddCommand($Command) > $null
$pwsh.AddParameter('ErrorFromEndBlock', $ErrorFromEndBlock) > $null
$pwsh.AddParameter('ErrorFromCleanBlock', $ErrorFromCleanBlock) > $null
if ($ErrorAction) { $pwsh.AddParameter('ErrorAction', $ErrorAction) > $null }
$pwsh.Invoke()
}
function RunScript {
param([string] $Script)
$pwsh.Commands.Clear()
$pwsh.Streams.ClearStreams()
$pwsh.AddScript($Script).Invoke()
}
function GetLastError {
$pwsh.Commands.Clear()
$pwsh.AddCommand('Get-Error').Invoke()
}
function GetAllErrors {
$pwsh.Commands.Clear()
$pwsh.AddScript('$Error').Invoke()
}
function ClearDollarError {
$pwsh.Commands.Clear()
$pwsh.AddScript('$Error.Clear()').Invoke()
}
#endregion
}
AfterAll {
$pwsh.Dispose()
}
It "Terminating errors from both 'End' (ThrowTerminatingError) and 'Clean' (ThrowTerminatingError) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowTerminatingError' -ErrorFromCleanBlock 'ThrowTerminatingError'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.CmdletInvocationException'
$failure.Exception.InnerException.InnerException | Should -BeOfType 'System.ArgumentException'
$failure.Exception.InnerException.InnerException.Message | Should -BeExactly 'end-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception | Should -BeOfType 'System.ArgumentException'
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-terminating-exception'
}
It "Terminating errors from both 'End' (ErrorActionStop) and 'Clean' (ThrowTerminatingError) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ErrorActionStop' -ErrorFromCleanBlock 'ThrowTerminatingError'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.ActionPreferenceStopException'
$failure.Exception.InnerException.Message | should -BeLike "*'NonExistEnd'*"
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception | Should -BeOfType 'System.ArgumentException'
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-terminating-exception'
}
It "Terminating errors from both 'End' (ThrowException) and 'Clean' (ThrowTerminatingError) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'ThrowTerminatingError'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception | Should -BeOfType 'System.ArgumentException'
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-terminating-exception'
}
It "Terminating errors from both 'End' (ThrowTerminatingError) and 'Clean' (ErrorActionStop) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowTerminatingError' -ErrorFromCleanBlock 'ErrorActionStop'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.CmdletInvocationException'
$failure.Exception.InnerException.InnerException | Should -BeOfType 'System.ArgumentException'
$failure.Exception.InnerException.InnerException.Message | Should -BeExactly 'end-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].FullyQualifiedErrorId | Should -BeExactly 'CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand'
$pwsh.Streams.Error[0].Exception.Message | Should -BeLike "*'NonExistClean'*"
}
It "Terminating errors from both 'End' (ErrorActionStop) and 'Clean' (ErrorActionStop) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ErrorActionStop' -ErrorFromCleanBlock 'ErrorActionStop'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.ActionPreferenceStopException'
$failure.Exception.InnerException.Message | should -BeLike "*'NonExistEnd'*"
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].FullyQualifiedErrorId | Should -BeExactly 'CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand'
$pwsh.Streams.Error[0].Exception.Message | Should -BeLike "*'NonExistClean'*"
}
It "Terminating errors from both 'End' (ThrowException) and 'Clean' (ErrorActionStop) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'ErrorActionStop'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].FullyQualifiedErrorId | Should -BeExactly 'CommandNotFoundException,Microsoft.PowerShell.Commands.GetCommandCommand'
$pwsh.Streams.Error[0].Exception.Message | Should -BeLike "*'NonExistClean'*"
}
It "Terminating errors from both 'End' (ThrowTerminatingError) and 'Clean' (ThrowException) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowTerminatingError' -ErrorFromCleanBlock 'ThrowException'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.CmdletInvocationException'
$failure.Exception.InnerException.InnerException | Should -BeOfType 'System.ArgumentException'
$failure.Exception.InnerException.InnerException.Message | Should -BeExactly 'end-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-throw-exception'
}
It "Terminating errors from both 'End' (ErrorActionStop) and 'Clean' (ThrowException) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ErrorActionStop' -ErrorFromCleanBlock 'ThrowException'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException | Should -BeOfType 'System.Management.Automation.ActionPreferenceStopException'
$failure.Exception.InnerException.Message | should -BeLike "*'NonExistEnd'*"
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-throw-exception'
}
It "Terminating errors from both 'End' (ThrowException) and 'Clean' (ThrowException) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'ThrowException'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-throw-exception'
}
It "Terminating errors from both 'End' (ThrowException) and 'Clean' (ThrowException) with ErrorAction '<ErrorAction>' should work properly" -TestCases @(
@{ ErrorAction = 'Ignore' }
@{ ErrorAction = 'SilentlyContinue' }
) {
param($ErrorAction)
ClearDollarError
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'ThrowException' -ErrorAction $ErrorAction
$pwsh.Streams.Error.Count | Should -Be 0
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1] | Should -BeExactly 'clean-verbose-message'
$ers = GetAllErrors
$ers.Count | Should -Be 2
$ers[0].Exception.Message | Should -BeExactly 'clean-throw-exception'
$ers[1].Exception.Message | Should -BeExactly 'end-throw-exception'
}
It "Non-terminating error from 'End' (WriteErrorAPI) and terminating error from 'Clean' (ThrowTerminatingError) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorAPI' -ErrorFromCleanBlock 'ThrowTerminatingError'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-arg-exception'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorAPI) and terminating error from 'Clean' (ErrorActionStop) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorAPI' -ErrorFromCleanBlock 'ErrorActionStop'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-arg-exception'
$pwsh.Streams.Error[1].Exception.Message | Should -BeLike "*'NonExistClean'*"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorAPI) and terminating error from 'Clean' (ThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorAPI' -ErrorFromCleanBlock 'ThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-arg-exception'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorCmdlet) and terminating error from 'Clean' (ThrowTerminatingError) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorCmdlet' -ErrorFromCleanBlock 'ThrowTerminatingError'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-write-error-cmdlet'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorCmdlet) and terminating error from 'Clean' (ErrorActionStop) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorCmdlet' -ErrorFromCleanBlock 'ErrorActionStop'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-write-error-cmdlet'
$pwsh.Streams.Error[1].Exception.Message | Should -BeLike "*'NonExistClean'*"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorCmdlet) and terminating error from 'Clean' (ThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorCmdlet' -ErrorFromCleanBlock 'ThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-write-error-cmdlet'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (MethodInvocationThrowException) and terminating error from 'Clean' (ThrowTerminatingError) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'MethodInvocationThrowException' -ErrorFromCleanBlock 'ThrowTerminatingError'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (MethodInvocationThrowException) and terminating error from 'Clean' (ErrorActionStop) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'MethodInvocationThrowException' -ErrorFromCleanBlock 'ErrorActionStop'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeLike "*'NonExistClean'*"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (MethodInvocationThrowException) and terminating error from 'Clean' (ThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'MethodInvocationThrowException' -ErrorFromCleanBlock 'ThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (ExpressionThrowException) and terminating error from 'Clean' (ThrowTerminatingError) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ExpressionThrowException' -ErrorFromCleanBlock 'ThrowTerminatingError'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-terminating-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (ExpressionThrowException) and terminating error from 'Clean' (ErrorActionStop) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ExpressionThrowException' -ErrorFromCleanBlock 'ErrorActionStop'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeLike "*'NonExistClean'*"
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Non-terminating error from 'End' (ExpressionThrowException) and terminating error from 'Clean' (ThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ExpressionThrowException' -ErrorFromCleanBlock 'ThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-throw-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'end-verbose-message'
}
It "Terminating error from 'End' (ThrowException) and non-terminating error from 'Clean' (WriteErrorAPI) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'WriteErrorAPI'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-arg-exception'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'clean-verbose-message'
}
It "Terminating error from 'End' (ThrowException) and non-terminating error from 'Clean' (WriteErrorCmdlet) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'WriteErrorCmdlet'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'clean-write-error-cmdlet'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'clean-verbose-message'
}
It "Terminating error from 'End' (ThrowException) and non-terminating error from 'Clean' (MethodInvocationThrowException) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'MethodInvocationThrowException'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'clean-verbose-message'
}
It "Terminating error from 'End' (ThrowException) and non-terminating error from 'Clean' (ExpressionThrowException) should work properly" {
$failure = $null
try {
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'ThrowException' -ErrorFromCleanBlock 'ExpressionThrowException'
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | should -BeExactly 'end-throw-exception'
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Verbose[0] | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorAPI) and non-terminating error from 'Clean' (WriteErrorCmdlet) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorAPI' -ErrorFromCleanBlock 'WriteErrorCmdlet'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-arg-exception'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-write-error-cmdlet'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorAPI) and non-terminating error from 'Clean' (MethodInvocationThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorAPI' -ErrorFromCleanBlock 'MethodInvocationThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-arg-exception'
$pwsh.Streams.Error[1].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorCmdlet) and non-terminating error from 'Clean' (WriteErrorAPI) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorCmdlet' -ErrorFromCleanBlock 'WriteErrorAPI'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-write-error-cmdlet'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-arg-exception'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (WriteErrorCmdlet) and non-terminating error from 'Clean' (ExpressionThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'WriteErrorCmdlet' -ErrorFromCleanBlock 'ExpressionThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'end-write-error-cmdlet'
$pwsh.Streams.Error[1].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (MethodInvocationThrowException) and non-terminating error from 'Clean' (WriteErrorCmdlet) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'MethodInvocationThrowException' -ErrorFromCleanBlock 'WriteErrorCmdlet'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'clean-write-error-cmdlet'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
It "Non-terminating error from 'End' (MethodInvocationThrowException) and non-terminating error from 'Clean' (ExpressionThrowException) should work properly" {
## No exception should be thrown
RunCommand -Command 'MultipleErrors' -ErrorFromEndBlock 'MethodInvocationThrowException' -ErrorFromCleanBlock 'ExpressionThrowException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.InnerException | Should -BeOfType 'System.ArgumentNullException'
$pwsh.Streams.Error[1].Exception.InnerException | Should -BeOfType 'System.DivideByZeroException'
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'end-verbose-message'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'clean-verbose-message'
}
}
Describe "Error handling within a pipeline (multiple commands with 'Clean' block)" -Tag 'CI' {
BeforeAll {
function test1 {
param([switch] $EmitErrorInProcess)
process {
if ($EmitErrorInProcess) {
throw 'test1-process'
}
Write-Output 'process-obj'
}
clean {
throw 'test1-clean'
Write-Verbose -Verbose 'test1-clean-verbose'
}
}
function test2 {
param([switch] $EmitErrorInProcess)
process {
if ($EmitErrorInProcess) {
throw 'test2-process'
}
Write-Verbose -Verbose $_
}
clean {
throw 'test2-clean'
Write-Verbose -Verbose 'test2-clean-verbose'
}
}
function test-1 {
param([switch] $EmitException)
process { 'output' }
clean {
if ($EmitException) {
throw 'test-1-clean-exception'
}
Write-Verbose -Verbose 'test-1-clean'
}
}
function test-2 {
param([switch] $EmitException)
process { $_ }
clean {
if ($EmitException) {
throw 'test-2-clean-exception'
}
Write-Verbose -Verbose 'test-2-clean'
}
}
function test-3 {
param([switch] $EmitException)
process { Write-Warning $_ }
clean {
if ($EmitException) {
throw 'test-3-clean-exception'
}
Write-Verbose -Verbose 'test-3-clean'
}
}
#region Helper
$pwsh = [PowerShell]::Create()
$text = (Get-Command test1, test2, test-1, test-2, test-3).ScriptBlock.Ast.Extent.Text
$pwsh.AddScript($text -join "`n").Invoke()
function RunScript {
param([string] $Script)
$pwsh.Commands.Clear()
$pwsh.Streams.ClearStreams()
$pwsh.AddScript($Script).Invoke()
}
#endregion
}
It "Errors from multiple 'Clean' blocks should work properly" {
## No exception should be thrown
RunScript -Script "test1 | test2"
## Exceptions thrown from 'throw' statement are not propagated up, but instead written to the error stream.
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'test1-clean'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'test2-clean'
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'process-obj'
}
It "ErrorAction should be honored by 'Clean' blocks" {
try {
RunScript -Script '$ErrorActionPreference = "SilentlyContinue"'
## No exception should be thrown.
RunScript -Script "test1 | test2"
## The exception from 'throw' statement should be suppressed by 'SilentlyContinue'.
$pwsh.Streams.Error.Count | Should -Be 0
$pwsh.Streams.Verbose.Count | Should -Be 3
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'process-obj'
$pwsh.Streams.Verbose[1].Message | Should -BeExactly 'test1-clean-verbose'
$pwsh.Streams.Verbose[2].Message | Should -BeExactly 'test2-clean-verbose'
}
finally {
## Revert error action back to 'Continue'
RunScript -Script '$ErrorActionPreference = "Continue"'
}
}
It "Errors from 'Clean' blocks should work properly when another named block emits error" {
$failure = $null
try {
RunScript -Script "test1 | test2 -EmitErrorInProcess"
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | Should -BeExactly 'test2-process'
$pwsh.Streams.Verbose.Count | Should -Be 0
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'test1-clean'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'test2-clean'
}
It "The 'Clean' block should not run when the none of other named blocks from the same command get to run" {
$failure = $null
try {
RunScript -Script "test1 -EmitErrorInProcess | test2"
} catch {
$failure = $_
}
$failure | Should -Not -BeNullOrEmpty
$failure.Exception | Should -BeOfType 'System.Management.Automation.MethodInvocationException'
$failure.Exception.InnerException.Message | Should -BeExactly 'test1-process'
## Only the 'Clean' block from 'test1' will run.
## The 'Clean' block from 'test2' won't run because none of the other blocks from 'test2' gets to run
## due to the terminating exception thrown from 'test1.Process'.
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'test1-clean'
}
It "Exception from the 'Clean' block at <Position> should not affect other 'Clean' blocks" -TestCases @(
@{ Position = 'beginning-of-pipeline'; Script = 'test-1 -EmitException | test-2 | test-3'; ExceptionMessage = 'test-1-clean-exception'; VerboseMessages = @('test-2-clean', 'test-3-clean') }
@{ Position = 'middle-of-pipeline'; Script = 'test-1 | test-2 -EmitException | test-3'; ExceptionMessage = 'test-2-clean-exception'; VerboseMessages = @('test-1-clean', 'test-3-clean') }
@{ Position = 'end-of-pipeline'; Script = 'test-1 | test-2 | test-3 -EmitException'; ExceptionMessage = 'test-3-clean-exception'; VerboseMessages = @('test-1-clean', 'test-2-clean') }
) {
param($Script, $ExceptionMessage, $VerboseMessages)
RunScript -Script $Script
$pwsh.Streams.Error.Count | Should -Be 1
$pwsh.Streams.Verbose.Count | Should -Be 2
$pwsh.Streams.Warning.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly $ExceptionMessage
$pwsh.Streams.Verbose[0].Message | Should -BeExactly $VerboseMessages[0]
$pwsh.Streams.Verbose[1].Message | Should -BeExactly $VerboseMessages[1]
$pwsh.Streams.Warning[0].Message | Should -BeExactly 'output'
}
It "Multiple exceptions from 'Clean' blocks should not affect other 'Clean' blocks" {
RunScript -Script 'test-1 -EmitException | test-2 | test-3 -EmitException'
$pwsh.Streams.Error.Count | Should -Be 2
$pwsh.Streams.Verbose.Count | Should -Be 1
$pwsh.Streams.Warning.Count | Should -Be 1
$pwsh.Streams.Error[0].Exception.Message | Should -BeExactly 'test-1-clean-exception'
$pwsh.Streams.Error[1].Exception.Message | Should -BeExactly 'test-3-clean-exception'
$pwsh.Streams.Verbose[0].Message | Should -BeExactly 'test-2-clean'
$pwsh.Streams.Warning[0].Message | Should -BeExactly 'output'
}
}