test(scoop-status): add minimal test suite

Only one function is tested and only one of its results is tested.

test/Scoop-Status.Tests.ps1

@@ -0,0 +1,61 @@
+# copied from scoop-status.ps1 and modified
+BeforeAll {
+    . "$PSScriptRoot\..\lib\manifest.ps1" # 'manifest' 'parse_json' "install_info"
+    . "$PSScriptRoot\..\lib\versions.ps1" # 'Select-CurrentVersion'
+    . "$PSScriptRoot\..\lib\core.ps1" # 'versiondir'
+    Import-Module "$PSScriptRoot\..\lib\core.ps1" -Function 'versiondir'
+
+    # check if scoop needs updating
+    $currentdir = versiondir 'scoop' 'current'
+    $needs_update = $false
+    $bucket_needs_update = $false
+    $script:network_failure = $false
+    $no_remotes = $args[0] -eq '-l' -or $args[0] -eq '--local'
+    if (!(Get-Command git -ErrorAction SilentlyContinue)) { $no_remotes = $true }
+    $list = @()
+    if (!(Get-FormatData ScoopStatus)) {
+        Update-FormatData "$PSScriptRoot\..\supporting\formats\ScoopTypes.Format.ps1xml"
+    }
+}
+
+# script-level content
+# todo
+Describe -Skip 'Show status and check for new app versions' -Tag 'Scoop' {
+    # scoop-status.ps1 is not structured in a way that makes this easy to test
+    # todo: refactor scoop-status.ps1's loop bodies to functions for easier testing
+    It 'throws when Global or User appdir is empty or does not exist' -Skip {
+
+    }
+}
+
+Describe 'Test-UpdateStatus' -Tag 'Scoop' {
+    BeforeAll {
+        Import-Module "$PSScriptRoot/../libexec/scoop-status.ps1" -Function 'Test-UpdateStatus'
+    }
+    # todo
+    It -Skip 'should return $true if $commits is falsy' {
+
+    }
+    # todo
+    It -Skip 'should return $false if $commits is truthy' {
+
+    }
+    It 'should return $true if "$repopath\.git`" does not exist' {
+        function makeTmpDir {
+            [OutputType([System.IO.DirectoryInfo])]
+            Param ()
+
+            [string] $tmpDirPath = Join-Path $env:TEMP $(New-Guid)
+
+            while (Test-Path $tmpDirPath) {
+                $tmpDirPath = Join-Path $env:TEMP $(New-Guid)
+            }
+
+            [System.IO.DirectoryInfo] $TmpDirInfo = New-Item $tmpDirPath -ItemType Directory
+            return $TmpDirInfo
+
+        }
+        [System.IO.DirectoryInfo] $emptyDir = makeTmpDir
+        Test-UpdateStatus $emptyDir.FullName | Should -Be $true
+    }
+}