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Pester.RSpec.ps1
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Pester.RSpec.ps1
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function Find-File {
[CmdletBinding()]
param (
[Parameter(Mandatory = $true)]
[String[]] $Path,
[String[]] $ExcludePath,
[Parameter(Mandatory = $true)]
[string] $Extension
)
$files =
foreach ($p in $Path) {
if ([String]::IsNullOrWhiteSpace($p)) {
continue
}
if ((& $script:SafeCommands['Test-Path'] $p)) {
# This can expand to more than one path when wildcard is used, those paths can be folders or files.
# We want to avoid expanding to paths that are not matching our filters, but also want to ensure that if
# user passes in MyTestFile.ps1 without the .Tests.ps1 it will still run.
# So at this step we look if we expanded the path to more than 1 item and use stricter rules with filtering.
# Or if the file was just a single file, we won't use stricter filtering for files.
# This allows us to use wildcards to get all .Tests.ps1 in the folder and all child folders, which is very useful.
# But prevents a rare scenario where you provide C:\files\*\MyTest.ps1, because in that case only .Tests.ps1 would be included.
$items = & $SafeCommands['Get-Item'] $p
$resolvedToMultipleFiles = $null -ne $items -and 1 -lt @($items).Length
foreach ($item in $items) {
if ($item.PSIsContainer) {
# this is an existing directory search it for tests file
& $SafeCommands['Get-ChildItem'] -Recurse -Path $item -Filter "*$Extension" -File
}
elseif ("FileSystem" -ne $item.PSProvider.Name) {
# item is not a directory and exists but is not a file so we are not interested
}
elseif ($resolvedToMultipleFiles) {
# item was resolved from a wildcarded path only use it if it has test extension
if ($item.FullName -like "*$Extension") {
# add unresolved path to have a note of the original path used to resolve this
& $SafeCommands['Add-Member'] -Name UnresolvedPath -Type NoteProperty -Value $p -InputObject $item
$item
}
}
else {
# this is some file, that was either provided directly, or resolved from wildcarded path as a single item,
# we don't care what type of file it is, or if it has test extension (.Tests.ps1) we should try to run it
# to allow any file that is provided directly to run
if (".ps1" -ne $item.Extension) {
& $SafeCommands['Write-Error'] "Script path '$item' is not a ps1 file." -ErrorAction Stop
}
# add unresolved path to have a note of the original path used to resolve this
& $SafeCommands['Add-Member'] -Name UnresolvedPath -Type NoteProperty -Value $p -InputObject $item
$item
}
}
}
else {
# this is a path that does not exist so let's hope it is
# a wildcarded path that will resolve to some files
& $SafeCommands['Get-ChildItem'] -Recurse -Path $p -Filter "*$Extension" -File
}
}
Filter-Excluded -Files $files -ExcludePath $ExcludePath | & $SafeCommands['Where-Object'] { $_ }
}
function Filter-Excluded ($Files, $ExcludePath) {
if ($null -eq $ExcludePath -or @($ExcludePath).Length -eq 0) {
return @($Files)
}
foreach ($file in @($Files)) {
# normalize backslashes for cross-platform ease of use
$p = $file.FullName -replace "/", "\"
$excluded = $false
foreach ($exclusion in (@($ExcludePath) -replace "/", "\")) {
if ($excluded) {
continue
}
if ($p -like $exclusion) {
$excluded = $true
}
}
if (-not $excluded) {
$file
}
}
}
function Add-RSpecTestObjectProperties {
param ($TestObject)
# adds properties that are specific to RSpec to the result object
# this includes figuring out the result
# formatting the failure message and stacktrace
$discoveryOnly = $PesterPreference.Run.SkipRun.Value
$TestObject.Result = if ($TestObject.Skipped) {
"Skipped"
}
elseif ($TestObject.Passed) {
"Passed"
}
elseif (-not $discoveryOnly -and $TestObject.ShouldRun -and (-not $TestObject.Executed -or -not $TestObject.Passed)) {
"Failed"
}
elseif ($discoveryOnly -and 0 -lt $TestObject.ErrorRecord.Count) {
"Failed"
}
else {
"NotRun"
}
foreach ($e in $TestObject.ErrorRecord) {
$r = ConvertTo-FailureLines $e
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayErrorMessage", [string]($r.Message -join [Environment]::NewLine)))
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayStackTrace", [string]($r.Trace -join [Environment]::NewLine)))
}
}
function Add-RSpecBlockObjectProperties ($BlockObject) {
foreach ($e in $BlockObject.ErrorRecord) {
$r = ConvertTo-FailureLines $e
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayErrorMessage", [string]($r.Message -join [Environment]::NewLine)))
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayStackTrace", [string]($r.Trace -join [Environment]::NewLine)))
}
}
function PostProcess-RspecTestRun ($TestRun) {
$discoveryOnly = $PesterPreference.Run.SkipRun.Value
Fold-Run $Run -OnTest {
param($t)
## decorate
# we already added the RSpec properties as part of the plugin
### summarize
$TestRun.Tests.Add($t)
switch ($t.Result) {
"NotRun" {
$null = $TestRun.NotRun.Add($t)
}
"Passed" {
$null = $TestRun.Passed.Add($t)
}
"Failed" {
$null = $TestRun.Failed.Add($t)
}
"Skipped" {
$null = $TestRun.Skipped.Add($t)
}
default { throw "Result $($t.Result) is not supported." }
}
} -OnBlock {
param ($b)
## decorate
# we already processed errors in the plugin step to make the available for reporting
$b.Result = if ($b.Skip) {
"Skipped"
}
elseif ($b.Passed) {
"Passed"
}
elseif (-not $discoveryOnly -and $b.ShouldRun -and (-not $b.Executed -or -not $b.Passed)) {
"Failed"
}
elseif ($discoveryOnly -and 0 -lt $b.ErrorRecord.Count) {
"Failed"
}
else {
"NotRun"
}
## sumamrize
# a block that has errors would write into failed blocks so we can report them
# later we can filter this to only report errors from AfterAll
if (0 -lt $b.ErrorRecord.Count) {
$TestRun.FailedBlocks.Add($b)
}
} -OnContainer {
param ($b)
## decorate
# here we add result
$b.result = if ($b.Skipped) {
"Skipped"
}
elseif ($b.Passed) {
"Passed"
}
elseif (0 -lt $b.ErrorRecord.Count) {
"Failed"
}
elseif (-not $discoveryOnly -and $b.ShouldRun -and (-not $b.Executed -or -not $b.Passed)) {
"Failed"
}
else {
"NotRun"
}
foreach ($e in $b.ErrorRecord) {
$r = ConvertTo-FailureLines $e
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayErrorMessage", [string]($r.Message -join [Environment]::NewLine)))
$e.PSObject.Properties.Add([Pester.Factory]::CreateNoteProperty("DisplayStackTrace", [string]($r.Trace -join [Environment]::NewLine)))
}
## summarize
if (0 -lt $b.ErrorRecord.Count) {
$TestRun.FailedContainers.Add($b)
}
$TestRun.Duration += $b.Duration
$TestRun.UserDuration += $b.UserDuration
$TestRun.FrameworkDuration += $b.FrameworkDuration
$TestRun.DiscoveryDuration += $b.DiscoveryDuration
}
$TestRun.PassedCount = $TestRun.Passed.Count
$TestRun.FailedCount = $TestRun.Failed.Count
$TestRun.SkippedCount = $TestRun.Skipped.Count
$TestRun.NotRunCount = $TestRun.NotRun.Count
$TestRun.TotalCount = $TestRun.Tests.Count
$TestRun.FailedBlocksCount = $TestRun.FailedBlocks.Count
$TestRun.FailedContainersCount = $TestRun.FailedContainers.Count
$TestRun.Result = if (0 -lt ($TestRun.FailedCount + $TestRun.FailedBlocksCount + $TestRun.FailedContainersCount)) {
"Failed"
}
else {
"Passed"
}
}
function Get-RSpecObjectDecoratorPlugin () {
New-PluginObject -Name "RSpecObjectDecoratorPlugin" `
-EachTestTeardownEnd {
param ($Context)
# TODO: consider moving this into the core if those results are just what we need, but look first at Gherkin and how many of those results are RSpec specific and how many are Gherkin specific
#TODO: also this is a plugin because it needs to run before the error processing kicks in, this mixes concerns here imho, and needs to be revisited, because the error writing logic is now dependent on this plugin
Add-RSpecTestObjectProperties $Context.Test
} -EachBlockTeardownEnd {
param($Context)
#TODO: also this is a plugin because it needs to run before the error processing kicks in (to be able to report correctly formatted errors on scrren in case teardown failure), this mixes concerns here imho, and needs to be revisited, because the error writing logic is now dependent on this plugin
Add-RSpecBlockObjectProperties $Context.Block
}
}
function New-PesterConfiguration {
<#
.SYNOPSIS
Creates a new PesterConfiguration object for advanced configuration of Invoke-Pester.
.DESCRIPTION
The New-PesterConfiguration function creates a new PesterConfiguration-object
to enable advanced configurations for runnings tests using Invoke-Pester.
Without parameters, the function generates a configuration-object with default
options. The returned PesterConfiguration-object can be modified to suit your
requirements.
Calling New-PesterConfiguration is equivalent to calling [PesterConfiguration]::Default which was used in early versions of Pester 5.
Sections and options:
```
Run:
Path: Directories to be searched for tests, paths directly to test files, or combination of both.
Default value: @('.')
ExcludePath: Directories or files to be excluded from the run.
Default value: @()
ScriptBlock: ScriptBlocks containing tests to be executed.
Default value: @()
Container: ContainerInfo objects containing tests to be executed.
Default value: @()
TestExtension: Filter used to identify test files.
Default value: '.Tests.ps1'
Exit: Exit with non-zero exit code when the test run fails. When used together with Throw, throwing an exception is preferred.
Default value: $false
Throw: Throw an exception when test run fails. When used together with Exit, throwing an exception is preferred.
Default value: $false
PassThru: Return result object to the pipeline after finishing the test run.
Default value: $false
SkipRun: Runs the discovery phase but skips run. Use it with PassThru to get object populated with all tests.
Default value: $false
Filter:
Tag: Tags of Describe, Context or It to be run.
Default value: @()
ExcludeTag: Tags of Describe, Context or It to be excluded from the run.
Default value: @()
Line: Filter by file and scriptblock start line, useful to run parsed tests programatically to avoid problems with expanded names. Example: 'C:\tests\file1.Tests.ps1:37'
Default value: @()
ExcludeLine: Exclude by file and scriptblock start line, takes precedence over Line.
Default value: @()
FullName: Full name of test with -like wildcards, joined by dot. Example: '*.describe Get-Item.test1'
Default value: @()
CodeCoverage:
Enabled: Enable CodeCoverage.
Default value: $false
OutputFormat: Format to use for code coverage report. Possible values: JaCoCo, CoverageGutters
Default value: 'JaCoCo'
OutputPath: Path relative to the current directory where code coverage report is saved.
Default value: 'coverage.xml'
OutputEncoding: Encoding of the output file.
Default value: 'UTF8'
Path: Directories or files to be used for codecoverage, by default the Path(s) from general settings are used, unless overridden here.
Default value: @()
ExcludeTests: Exclude tests from code coverage. This uses the TestFilter from general configuration.
Default value: $true
RecursePaths: Will recurse through directories in the Path option.
Default value: $true
CoveragePercentTarget: Target percent of code coverage that you want to achieve, default 75%.
Default value: 75
UseBreakpoints: EXPERIMENTAL: When false, use Profiler based tracer to do CodeCoverage instead of using breakpoints.
Default value: $true
SingleHitBreakpoints: Remove breakpoint when it is hit.
Default value: $true
TestResult:
Enabled: Enable TestResult.
Default value: $false
OutputFormat: Format to use for test result report. Possible values: NUnitXml, NUnit2.5 or JUnitXml
Default value: 'NUnitXml'
OutputPath: Path relative to the current directory where test result report is saved.
Default value: 'testResults.xml'
OutputEncoding: Encoding of the output file.
Default value: 'UTF8'
TestSuiteName: Set the name assigned to the root 'test-suite' element.
Default value: 'Pester'
Should:
ErrorAction: Controls if Should throws on error. Use 'Stop' to throw on error, or 'Continue' to fail at the end of the test.
Default value: 'Stop'
Debug:
ShowFullErrors: Show full errors including Pester internal stack. This property is deprecated, and if set to true it will override Output.StackTraceVerbosity to 'Full'.
Default value: $false
WriteDebugMessages: Write Debug messages to screen.
Default value: $false
WriteDebugMessagesFrom: Write Debug messages from a given source, WriteDebugMessages must be set to true for this to work. You can use like wildcards to get messages from multiple sources, as well as * to get everything.
Default value: @('Discovery', 'Skip', 'Mock', 'CodeCoverage')
ShowNavigationMarkers: Write paths after every block and test, for easy navigation in VSCode.
Default value: $false
ReturnRawResultObject: Returns unfiltered result object, this is for development only. Do not rely on this object for additional properties, non-public properties will be renamed without previous notice.
Default value: $false
Output:
Verbosity: The verbosity of output, options are None, Normal, Detailed and Diagnostic.
Default value: 'Normal'
StackTraceVerbosity: The verbosity of stacktrace output, options are None, FirstLine, Filtered and Full.
Default value: 'Filtered'
CIFormat: The CI format of error output in build logs, options are None, Auto, AzureDevops and GithubActions.
Default value: 'Auto'
TestDrive:
Enabled: Enable TestDrive.
Default value: $true
TestRegistry:
Enabled: Enable TestRegistry.
Default value: $true
```
.PARAMETER Hashtable
Override the default values for the options defined in the provided dictionary/hashtable.
See Description in this help or inspect a PesterConfiguration-object to learn about the schema and
available options.
.EXAMPLE
```powershell
$config = New-PesterConfiguration
$config.Run.PassThru = $true
Invoke-Pester -Configuration $config
```
Creates a default PesterConfiguration-object and changes the Run.PassThru option
to return the result object after the test run. The configuration object is
provided to Invoke-Pester to alter the default behaviour.
.EXAMPLE
```powershell
$MyOptions = @{
Run = @{ # Run configuration.
PassThru = $true # Return result object after finishing the test run.
}
Filter = @{ # Filter configuration
Tag = "Core","Integration" # Run only Describe/Context/It-blocks with 'Core' or 'Integration' tags
}
}
$config = New-PesterConfiguration -Hashtable $MyOptions
Invoke-Pester -Configuration $config
```
A hashtable is created with custom options and passed to the New-PesterConfiguration to merge
with the default configuration. The options in the hashtable will override the default values.
The configuration object is then provided to Invoke-Pester to begin the test run using
the new configuration.
.LINK
https://pester.dev/docs/commands/New-PesterConfiguration
.LINK
https://pester.dev/docs/usage/Configuration
.LINK
https://pester.dev/docs/commands/Invoke-Pester
#>
[CmdletBinding()]
param(
[System.Collections.IDictionary] $Hashtable
)
if ($PSBoundParameters.ContainsKey('Hashtable')) {
[PesterConfiguration]$Hashtable
}
else {
[PesterConfiguration]::Default
}
}
function Remove-RSpecNonPublicProperties ($run) {
# $runProperties = @(
# 'Configuration'
# 'Containers'
# 'ExecutedAt'
# 'FailedBlocksCount'
# 'FailedCount'
# 'NotRunCount'
# 'PassedCount'
# 'PSBoundParameters'
# 'Result'
# 'SkippedCount'
# 'TotalCount'
# 'Duration'
# )
# $containerProperties = @(
# 'Blocks'
# 'Content'
# 'ErrorRecord'
# 'Executed'
# 'ExecutedAt'
# 'FailedCount'
# 'NotRunCount'
# 'PassedCount'
# 'Result'
# 'ShouldRun'
# 'Skip'
# 'SkippedCount'
# 'Duration'
# 'Type' # needed because of nunit export path expansion
# 'TotalCount'
# )
# $blockProperties = @(
# 'Blocks'
# 'ErrorRecord'
# 'Executed'
# 'ExecutedAt'
# 'FailedCount'
# 'Name'
# 'NotRunCount'
# 'PassedCount'
# 'Path'
# 'Result'
# 'ScriptBlock'
# 'ShouldRun'
# 'Skip'
# 'SkippedCount'
# 'StandardOutput'
# 'Tag'
# 'Tests'
# 'Duration'
# 'TotalCount'
# )
# $testProperties = @(
# 'Data'
# 'ErrorRecord'
# 'Executed'
# 'ExecutedAt'
# 'ExpandedName'
# 'Id' # needed because of grouping of data driven tests in nunit export
# 'Name'
# 'Path'
# 'Result'
# 'ScriptBlock'
# 'ShouldRun'
# 'Skip'
# 'Skipped'
# 'StandardOutput'
# 'Tag'
# 'Duration'
# )
Fold-Run $run -OnRun {
param($i)
# $ps = $i.PsObject.Properties.Name
# foreach ($p in $ps) {
# if ($p -like 'Plugin*') {
# $i.PsObject.Properties.Remove($p)
# }
# }
$i.PluginConfiguration = $null
$i.PluginData = $null
$i.Plugins = $null
} -OnContainer {
param($i)
# $ps = $i.PsObject.Properties.Name
# foreach ($p in $ps) {
# if ($p -like 'Own*') {
# $i.PsObject.Properties.Remove($p)
# }
# }
# $i.FrameworkData = $null
# $i.PluginConfiguration = $null
# $i.PluginData = $null
# $i.Plugins = $null
} -OnBlock {
param($i)
# $ps = $i.PsObject.Properties.Name
# foreach ($p in $ps) {
# if ($p -eq 'FrameworkData' -or $p -like 'Own*' -or $p -like 'Plugin*') {
# $i.PsObject.Properties.Remove($p)
# }
# }
$i.FrameworkData = $null
$i.PluginData = $null
} -OnTest {
param($i)
# $ps = $i.PsObject.Properties.Name
# foreach ($p in $ps) {
# if ($p -eq 'FrameworkData' -or $p -like 'Plugin*') {
# $i.PsObject.Properties.Remove($p)
# }
# }
$i.FrameworkData = $null
$i.PluginData = $null
}
}
function New-PesterContainer {
<#
.SYNOPSIS
Generates ContainerInfo-objects used as for Invoke-Pester -Container
.DESCRIPTION
Pester 5 supports running tests files and scriptblocks using parameter-input.
To use this feature, Invoke-Pester expects one or more ContainerInfo-objects
created using this funciton, that specify test containers in the form of paths
to the test files or scriptblocks containing the tests directly.
A optional Data-dictionary can be provided to supply the containers with any
required parameter-values. This is useful in when tests are generated dynamically
based on parameter-input. This method enables complex test-solutions while being
able to re-use a lot of test-code.
.PARAMETER Path
Specifies one or more paths to files containing tests. The value is a path\file
name or name pattern. Wildcards are permitted.
.PARAMETER ScriptBlock
Specifies one or more scriptblocks containing tests.
.PARAMETER Data
Allows a dictionary to be provided with parameter-values that should be used during
execution of the test containers defined in Path or ScriptBlock.
.EXAMPLE
```powershell
$container = New-PesterContainer -Path 'CodingStyle.Tests.ps1' -Data @{ File = "Get-Emoji.ps1" }
Invoke-Pester -Container $container
```
This example runs Pester using a generated ContainerInfo-object referencing a file and
required parameters that's provided to the test-file during execution.
.EXAMPLE
```powershell
$sb = {
Describe 'Testing New-PesterContainer' {
It 'Useless test' {
"foo" | Should -Not -Be "bar"
}
}
}
$container = New-PesterContainer -ScriptBlock $sb
Invoke-Pester -Container $container
```
This example runs Pester agianst a scriptblock. New-PesterContainer is used to genreated
the requried ContainerInfo-object that enables us to do this directly.
.LINK
https://pester.dev/docs/commands/New-PesterContainer
.LINK
https://pester.dev/docs/commands/Invoke-Pester
.LINK
https://pester.dev/docs/usage/data-driven-tests
#>
[CmdletBinding(DefaultParameterSetName = "Path")]
param(
[Parameter(Mandatory, ParameterSetName = "Path")]
[String[]] $Path,
[Parameter(Mandatory, ParameterSetName = "ScriptBlock")]
[ScriptBlock[]] $ScriptBlock,
[Collections.IDictionary[]] $Data
)
# it seems that when I don't assign $Data to $dt here the foreach does not always work in 5.1 :/ some vooodo
$dt = $Data
# expand to ContainerInfo user can provide multiple sets of data, but ContainerInfo can hold only one
# to keep the internal logic simple.
$kind = $PSCmdlet.ParameterSetName
if ('ScriptBlock' -eq $kind) {
# the @() is significant here, it will make it iterate even if there are no data
# which allows scriptblocks without data to run
foreach ($d in @($dt)) {
foreach ($sb in $ScriptBlock) {
New-BlockContainerObject -ScriptBlock $sb -Data $d
}
}
}
if ("Path" -eq $kind) {
# the @() is significant here, it will make it iterate even if there are no data
# which allows files without data to run
foreach ($d in @($dt)) {
foreach ($p in $Path) {
# resolve the path we are given in the same way we would resolve -Path on Invoke-Pester
$files = @(Find-File -Path $p -ExcludePath $PesterPreference.Run.ExcludePath.Value -Extension $PesterPreference.Run.TestExtension.Value)
foreach ($file in $files) {
New-BlockContainerObject -File $file -Data $d
}
}
}
}
}