Public/TestHelpers/Test.ErrorLogs.Tests.ps1
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#Requires -Version 5.0 #Requires -Modules @{ ModuleName="Pester"; ModuleVersion="4.10.1" } $ErrorActionPreference = "Stop"; Set-StrictMode -Version 'Latest' $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.ps1', '.psm1' $module = Import-Module "$PSScriptRoot\$sut" -Force -PassThru Describe 'CheckEventViewerForErrors' -Tags 'Unit' { $moduleName = $module.Name $fakeSource = 'NonExistentSource' $logName = 'Application' $logSource = 'Pester' $commandToMock = 'Get-EventLog' It 'returns $false when there are no entries found for the source' { # Arrange $expected = $true Mock ` -ModuleName $moduleName ` -CommandName $commandToMock ` -MockWith { New-Object System.Exception } # Act [bool] $actual = CheckEventViewerForErrors ` -logName $logName ` -logSource $fakeSource ` -dateGreaterThanFilter $(Get-Date) # Assert Assert-MockCalled -ModuleName $moduleName -CommandName $commandToMock $actual | Should Be $expected } It 'returns $false when there are entries for the source but no errors' { # Arrange $expected = $false Mock ` -ModuleName $moduleName ` -CommandName $commandToMock ` -MockWith { return @{ TimeGenerated = Get-Date; EntryType = 'Information' } } # Act [bool] $actual = CheckEventViewerForErrors ` -logName $logName ` -logSource $logSource ` -dateGreaterThanFilter (Get-Date).AddDays(-1) # Assert Assert-MockCalled -ModuleName $moduleName -CommandName $commandToMock $actual | Should Be $expected } It 'returns $true when there are error entries for the source' { # Arrange $expected = $true Mock ` -ModuleName $moduleName ` -CommandName $commandToMock ` -MockWith { return @{ TimeGenerated = Get-Date; EntryType = 'Error' } } # Act [bool] $actual = CheckEventViewerForErrors ` -logName $logName ` -logSource $logSource ` -dateGreaterThanFilter (Get-Date).AddDays(-1) # Assert Assert-MockCalled -ModuleName $moduleName -CommandName $commandToMock $actual | Should Be $expected } } Describe 'CheckEventViewerForErrors' -Tags 'Integration' { BeforeEach { $logSource = "Pester" if ($null -eq (Get-EventLog -LogName Application -Source $logSource -ErrorAction SilentlyContinue)) { New-EventLog -Source $logSource -LogName Application } } It 'returns $false when there are no entries found' { # Arrange [bool] $expected = $false # Act [bool] $actual = CheckEventViewerForErrors -logSource 'NonExistentSource' -dateGreaterThanFilter (Get-Date) # Assert $actual | Should Be $expected } It 'returns $true when there are entries for the source but no errors' { # Arrange [bool] $expected = $true Write-EventLog -LogName Application -Source $logSource -Message 'Log for test' -EntryType Information -EventId 0 # Act [bool] $actual = CheckEventViewerForErrors -logSource $logSource -dateGreaterThanFilter (Get-Date) # Assert $actual | Should Be $expected } It 'returns $false when there are error entries for the source' { # Arrange [bool] $expected = $true Write-EventLog -LogName Application -Source $logSource -Message 'Log for test' -EntryType Error -EventId 0 # Act [bool] $actual = CheckEventViewerForErrors -logSource $logSource -dateGreaterThanFilter (Get-Date) # Assert $actual | Should Be $expected } } |