Test/Pester.3.3.8/tools/Functions/Context.ps1
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function Context { <# .SYNOPSIS Provides logical grouping of It blocks within a single Describe block. Any Mocks defined inside a Context are removed at the end of the Context scope, as are any files or folders added to the TestDrive during the Context block's execution. Any BeforeEach or AfterEach blocks defined inside a Context also only apply to tests within that Context . .PARAMETER Name The name of the Context. This is a phrase describing a set of tests within a describe. .PARAMETER Fixture Script that is executed. This may include setup specific to the context and one or more It blocks that validate the expected outcomes. .EXAMPLE function Add-Numbers($a, $b) { return $a + $b } Describe "Add-Numbers" { Context "when root does not exist" { It "..." { ... } } Context "when root does exist" { It "..." { ... } It "..." { ... } It "..." { ... } } } .LINK Describe It BeforeEach AfterEach about_Should about_Mocking about_TestDrive #> param( [Parameter(Mandatory = $true)] [string] $Name, [ValidateNotNull()] [ScriptBlock] $Fixture = $(Throw "No test script block is provided. (Have you put the open curly brace on the next line?)") ) Assert-DescribeInProgress -CommandName Context $Pester.EnterContext($Name ) $TestDriveContent = Get-TestDriveChildItem $Pester.CurrentContext | Write-Context try { Add-SetupAndTeardown -ScriptBlock $Fixture Invoke-TestGroupSetupBlocks -Scope $pester.Scope do { $null = & $Fixture } until ($true) } catch { $firstStackTraceLine = $_.InvocationInfo.PositionMessage.Trim() -split '\r?\n' | Select-Object -First 1 $Pester.AddTestResult('Error occurred in Context block', "Failed", $null, $_.Exception.Message, $firstStackTraceLine) $Pester.TestResult[-1] | Write-PesterResult } finally { Invoke-TestGroupTeardownBlocks -Scope $pester.Scope } Clear-SetupAndTeardown Clear-TestDrive -Exclude ($TestDriveContent | select -ExpandProperty FullName) Exit-MockScope $Pester.LeaveContext() } |