PowerShell · TravisEz13 · Jan 15, 2026 · Jan 14, 2026 · Jan 14, 2026 · Jan 14, 2026
@@ -0,0 +1,104 @@
+# Copyright (c) Microsoft Corporation.
+# Licensed under the MIT License.
+
+Describe "Packaging Module Functions" {
+    BeforeAll {
+        Import-Module $PSScriptRoot/../../build.psm1 -Force
+        Import-Module $PSScriptRoot/../../tools/packaging/packaging.psm1 -Force
+    }
+
+    Context "Test-IsPreview function" {
+        It "Should return True for preview versions" {
+            Test-IsPreview -Version "7.6.0-preview.6" | Should -Be $true
+            Test-IsPreview -Version "7.5.0-rc.1" | Should -Be $true
+            Test-IsPreview -Version "7.4.0-preview.1" | Should -Be $true
+        }
+
+        It "Should return False for stable versions" {
+            Test-IsPreview -Version "7.6.0" | Should -Be $false
+            Test-IsPreview -Version "7.5.0" | Should -Be $false
+            Test-IsPreview -Version "7.4.13" | Should -Be $false
+        }
+
+        It "Should return False for LTS builds regardless of version string" {
+            Test-IsPreview -Version "7.6.0-preview.6" -IsLTS | Should -Be $false
+            Test-IsPreview -Version "7.4.0-rc.1" -IsLTS | Should -Be $false
+            Test-IsPreview -Version "7.5.0" -IsLTS | Should -Be $false
+        }
+    }
+
+    Context "Get-MacOSPackageId function" {
+        It "Should return preview identifier when -IsPreview is specified" {
+            $result = Get-MacOSPackageId -IsPreview
+            $result | Should -Be "com.microsoft.powershell-preview"
+        }
+
+        It "Should return stable identifier when -IsPreview is not specified" {
+            $result = Get-MacOSPackageId
+            $result | Should -Be "com.microsoft.powershell"
+        }
+    }
+
+    Context "macOS preview package identifier detection" {
+        It "Should correctly detect preview from version string for preview builds" {
+            # Simulate the logic used in New-MacOSPackage
+            $Version = "7.6.0-preview.6"
+            $LTS = $false
+            $Name = "powershell"  # Preview builds use "powershell" not "powershell-preview"
+
+            $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+            $pkgIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
+
+            $IsPreview | Should -Be $true -Because "Version string contains preview marker"
+            $pkgIdentifier | Should -Be "com.microsoft.powershell-preview" -Because "Preview builds should use preview identifier"
+        }
+
+        It "Should correctly detect stable from version string for stable builds" {
+            # Simulate the logic used in New-MacOSPackage
+            $Version = "7.6.0"
+            $LTS = $false
+            $Name = "powershell"
+
+            $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+            $pkgIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
+
+            $IsPreview | Should -Be $false -Because "Version string does not contain preview marker"
+            $pkgIdentifier | Should -Be "com.microsoft.powershell" -Because "Stable builds should use stable identifier"
+        }
+
+        It "Should treat LTS builds as stable even with preview version string" {
+            # Simulate the logic used in New-MacOSPackage
+            $Version = "7.4.0-preview.1"
+            $LTS = $true
+            $Name = "powershell-lts"
+
+            $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+            $pkgIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
+
+            $IsPreview | Should -Be $false -Because "LTS flag takes precedence over version string"
+            $pkgIdentifier | Should -Be "com.microsoft.powershell" -Because "LTS builds should use stable identifier"
+        }
+
+        It "Should NOT use package name for preview detection" {
+            # This test verifies the fix for issue #26673
+            # The bug was using ($Name -like '*-preview') which always returned false
+            # because preview builds use Name="powershell" not "powershell-preview"
+
+            $Version = "7.6.0-preview.6"
+            $LTS = $false
+            $Name = "powershell"  # This is what preview builds actually use
+
+            # The INCORRECT logic would have been: $Name -like '*-preview'
+            $incorrectCheck = $Name -like '*-preview'
+            $incorrectCheck | Should -Be $false -Because "Preview package names are 'powershell' not 'powershell-preview'"
+
+            # The CORRECT logic uses Test-IsPreview with Version
+            $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+            $IsPreview | Should -Be $true -Because "Version string correctly identifies preview builds"
+
+            # Verify the correct identifier is generated
+            $pkgIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
+            $pkgIdentifier | Should -Be "com.microsoft.powershell-preview" -Because "Preview builds must use preview identifier"
+        }
+    }
+}
@@ -1371,6 +1371,7 @@ function New-UnixPackage {
                         AppsFolder = $AppsFolder
                         HostArchitecture = $HostArchitecture
                         CurrentLocation = $CurrentLocation
+                        LTS = $LTS
                     }
 
                     try {
@@ -1984,7 +1985,9 @@ function New-MacOSPackage
         [Parameter(Mandatory)]
         [string]$HostArchitecture,
 
-        [string]$CurrentLocation = (Get-Location)
+        [string]$CurrentLocation = (Get-Location),
+
+        [switch]$LTS
     )
 
     Write-Log "Creating macOS package using pkgbuild and productbuild..."
@@ -2060,7 +2063,8 @@ function New-MacOSPackage
         }
 
         # Build the component package using pkgbuild
-        $pkgIdentifier = Get-MacOSPackageId -IsPreview:($Name -like '*-preview')
+        $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+        $pkgIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
 
         if ($PSCmdlet.ShouldProcess("Build component package with pkgbuild")) {
             Write-Log "Running pkgbuild to create component package..."
@@ -2085,7 +2089,7 @@ function New-MacOSPackage
             -OutputDirectory $CurrentLocation `
             -HostArchitecture $HostArchitecture `
             -PackageIdentifier $pkgIdentifier `
-            -IsPreview:($Name -like '*-preview')
+            -IsPreview:$IsPreview
 
         return $distributionPackage
     }