PowerShell · TravisEz13 · Jan 15, 2026 · Jan 14, 2026 · Jan 14, 2026 · Jan 14, 2026
@@ -0,0 +1,77 @@
+# 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
+        }
+
+        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
+        }
+
+        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 "7.5.0" -IsLTS | Should -Be $false
+        }
+    }
+
+    Context "Get-MacOSPackageId function" {
+        It "Should return preview identifier when -IsPreview is specified" {
+            Get-MacOSPackageId -IsPreview | Should -Be "com.microsoft.powershell-preview"
+        }
+
+        It "Should return stable identifier when -IsPreview is not specified" {
+            Get-MacOSPackageId | Should -Be "com.microsoft.powershell"
+        }
+    }
+
+    Context "Get-MacOSPackageIdentifierInfo function (New-MacOSPackage logic)" {
+        It "Should detect preview builds and return preview identifier" {
+            $result = Get-MacOSPackageIdentifierInfo -Version "7.6.0-preview.6" -LTS:$false
+
+            $result.IsPreview | Should -Be $true
+            $result.PackageIdentifier | Should -Be "com.microsoft.powershell-preview"
+        }
+
+        It "Should detect stable builds and return stable identifier" {
+            $result = Get-MacOSPackageIdentifierInfo -Version "7.6.0" -LTS:$false
+
+            $result.IsPreview | Should -Be $false
+            $result.PackageIdentifier | Should -Be "com.microsoft.powershell"
+        }
+
+        It "Should treat LTS builds as stable even with preview version string" {
+            $result = Get-MacOSPackageIdentifierInfo -Version "7.4.0-preview.1" -LTS:$true
+
+            $result.IsPreview | Should -Be $false
+            $result.PackageIdentifier | Should -Be "com.microsoft.powershell"
+        }
+
+        It "Should NOT use package name for preview detection (bug fix verification)" {
+            # This test verifies the fix for issue #26673
+            # The bug was using ($Name -like '*-preview') which always returned false
+            # because preview builds use Name="powershell" not "powershell-preview"
+
+            $Version = "7.6.0-preview.6"
+            $Name = "powershell"  # Preview builds use "powershell" not "powershell-preview"
+
+            # The INCORRECT logic (the bug): $Name -like '*-preview'
+            $incorrectCheck = $Name -like '*-preview'
+            $incorrectCheck | Should -Be $false -Because "Package name is 'powershell' not 'powershell-preview'"
+
+            # The CORRECT logic (the fix): uses version string
+            $result = Get-MacOSPackageIdentifierInfo -Version $Version -LTS:$false
+            $result.IsPreview | Should -Be $true -Because "Version string correctly identifies preview"
+            $result.PackageIdentifier | Should -Be "com.microsoft.powershell-preview"
+        }
+    }
+}
@@ -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..."
@@ -2059,8 +2062,10 @@ function New-MacOSPackage
             Copy-Item -Path "$AppsFolder/*" -Destination $appsInPkg -Recurse -Force
         }
 
-        # Build the component package using pkgbuild
-        $pkgIdentifier = Get-MacOSPackageId -IsPreview:($Name -like '*-preview')
+        # Get package identifier info based on version and LTS flag
+        $packageInfo = Get-MacOSPackageIdentifierInfo -Version $Version -LTS:$LTS
+        $IsPreview = $packageInfo.IsPreview
+        $pkgIdentifier = $packageInfo.PackageIdentifier
 
         if ($PSCmdlet.ShouldProcess("Build component package with pkgbuild")) {
             Write-Log "Running pkgbuild to create component package..."
@@ -2085,7 +2090,7 @@ function New-MacOSPackage
             -OutputDirectory $CurrentLocation `
             -HostArchitecture $HostArchitecture `
             -PackageIdentifier $pkgIdentifier `
-            -IsPreview:($Name -like '*-preview')
+            -IsPreview:$IsPreview
 
         return $distributionPackage
     }
@@ -2309,6 +2314,40 @@ function Get-MacOSPackageId
     }
 }
 
+<#
+    .SYNOPSIS
+        Determines the package identifier and preview status for macOS packages.
+    .DESCRIPTION
+        This function determines if a package is a preview build based on the version string
+        and LTS flag, then returns the appropriate package identifier.
+    .PARAMETER Version
+        The version string (e.g., "7.6.0-preview.6" or "7.6.0")
+    .PARAMETER LTS
+        Whether this is an LTS build
+    .OUTPUTS
+        Hashtable with IsPreview (boolean) and PackageIdentifier (string) properties
+    .EXAMPLE
+        Get-MacOSPackageIdentifierInfo -Version "7.6.0-preview.6" -LTS:$false
+        Returns @{ IsPreview = $true; PackageIdentifier = "com.microsoft.powershell-preview" }
+#>
+function Get-MacOSPackageIdentifierInfo
+{
+    param(
+        [Parameter(Mandatory)]
+        [string]$Version,
+
+        [switch]$LTS
+    )
+
+    $IsPreview = Test-IsPreview -Version $Version -IsLTS:$LTS
+    $PackageIdentifier = Get-MacOSPackageId -IsPreview:$IsPreview
+
+    return @{
+        IsPreview = $IsPreview
+        PackageIdentifier = $PackageIdentifier
+    }
+}
+
 # Dynamically build macOS launcher application.
 function New-MacOSLauncher
 {