public/Automerge-DockerImageVariantsPR.Tests.ps1
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$here = Split-Path -Parent $MyInvocation.MyCommand.Path $sut = (Split-Path -Leaf $MyInvocation.MyCommand.Path) -replace '\.Tests\.', '.' . "$here\$sut" Describe "Automerge-DockerImageVariantsPR" -Tag 'Unit' { BeforeEach { $env:GITHUB_TOKEN = 'foo' $pr = [PSCustomObject]@{ number = 123 base = [pscustomobject]@{ ref = 'master' sha = 'abc0123' repo = [pscustomobject]@{ full_name = 'namespace/project' } } head = [pscustomobject]@{ sha = 'def0123' ref = "mybranch" } html_url = 'https://...' state = 'open' mergeable = $true merged = $false } $commits = [pscustomobject]@{ behind_by = 0 } $checkSuites = [pscustomobject]@{ total_count = 5 check_suites = @( 1..5 | % { [pscustomobject]@{ created_at = Get-Date status = 'completed' conclusion = 'success' } } ) } function git {} Mock git {} function Execute-Command {} Mock Execute-Command { [CmdletBinding(DefaultParameterSetName='Default')] param ( [Parameter(Mandatory,ParameterSetName='Default',Position=0)] [ValidateNotNull()] [object]$Command , [Parameter(ValueFromPipeline,ParameterSetName='Pipeline')] [object]$InputObject ) $Command = if ($InputObject) { $InputObject } else { $Command } Invoke-Command $Command } Mock Invoke-RestMethod { param ( $Method, $Uri ) if ($Uri -eq 'https://api.github.com/repos/namespace/project/pulls/123') { $pr }elseif ($Uri -eq 'https://api.github.com/repos/namespace/project/compare/master...def0123') { $commits }elseif ($Uri -eq 'https://api.github.com/repos/namespace/project/commits/def0123/check-suites') { $checkSuites }elseif ($Uri -eq 'https://api.github.com/repos/namespace/project/pulls/123/merge') { [pscustomobject]@{ sha = 'abcdef0' merged = $true message = 'Pull Request successfully merged' } } } function Start-Sleep {} Mock Start-Sleep {} } It "Errors if PR is not mergeable" { $pr.mergeable = $false { $pr = Automerge-DockerImageVariantsPR -PR $pr -ErrorAction Stop 6>$null } | Should -Throw "Skip merging PR because it is not mergeable" Assert-MockCalled Invoke-RestMethod -Scope It -Times 1 Assert-MockCalled git -Scope It -Times 0 Assert-MockCalled Execute-Command -Scope It -Times 0 Assert-MockCalled Start-Sleep -Scope It -Times 0 } It "Errors if PR check suite failed" { foreach ($c in $checkSuites.check_suites) { $c.conclusion = 'failure' } $checkSuites { $pr = Automerge-DockerImageVariantsPR -PR $pr -ErrorAction Stop 6>$null } | Should -Throw "Check suite failed. Skip merging" Assert-MockCalled Invoke-RestMethod -Scope It -Times 1 Assert-MockCalled git -Scope It -Times 0 Assert-MockCalled Execute-Command -Scope It -Times 0 Assert-MockCalled Start-Sleep -Scope It -Times 0 } It "Rebases if PR head is behind master" { $commits.behind_by = 1 Mock git { if ("$Args" -eq 'push origin mybranch -f') { $commits.behind_by = 0 } } $pr = Automerge-DockerImageVariantsPR -PR $pr 6>$null Assert-MockCalled Invoke-RestMethod -Scope It -Times 5 Assert-MockCalled Execute-Command -Scope It -Times 4 Assert-MockCalled git -Scope It -Times 4 Assert-MockCalled Start-Sleep -Scope It -Times 1 $pr | Should -BeOfType [pscustomobject] } It "Merges PRs" { $pr = Automerge-DockerImageVariantsPR -PR $pr 6>$null Assert-MockCalled Invoke-RestMethod -Scope It -Times 5 Assert-MockCalled git -Scope It -Times 0 Assert-MockCalled Execute-Command -Scope It -Times 0 Assert-MockCalled Start-Sleep -Scope It -Times 0 $pr | Should -BeOfType [pscustomobject] } It "-WhatIf" { $pr = Automerge-DockerImageVariantsPR -PR $pr -WhatIf -ErrorVariable err 6>$null Assert-MockCalled Invoke-RestMethod -Scope It -Times 0 Assert-MockCalled git -Scope It -Times 0 Assert-MockCalled Execute-Command -Scope It -Times 0 Assert-MockCalled Start-Sleep -Scope It -Times 0 $pr | Should -Be $null $err | Should -Be $null } } |