From 60a6d6a1254ed756126144c9215931858f34f651 Mon Sep 17 00:00:00 2001
From: alerickson <25858831+alerickson@users.noreply.github.com>
Date: Mon, 31 Jul 2023 19:16:37 -0700
Subject: [PATCH 1/3] Set prerelease variable default value to Prerelease param
 value

---
 src/code/UpdatePSResource.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/code/UpdatePSResource.cs b/src/code/UpdatePSResource.cs
index 9790e63f3..8456464c1 100644
--- a/src/code/UpdatePSResource.cs
+++ b/src/code/UpdatePSResource.cs
@@ -257,7 +257,7 @@ private string[] ProcessPackageNames(
             VersionType versionType,
             out bool latestInstalledIsPrerelease)
         {
-            latestInstalledIsPrerelease = false;
+            latestInstalledIsPrerelease = Prerelease;
 
             namesToProcess = Utils.ProcessNameWildcards(
                 pkgNames: namesToProcess,

From aee03563220e021db5446b4e6162565b1ad6a6c2 Mon Sep 17 00:00:00 2001
From: alerickson <25858831+alerickson@users.noreply.github.com>
Date: Mon, 31 Jul 2023 19:38:55 -0700
Subject: [PATCH 2/3] Change how prerelease is validated

---
 src/code/UpdatePSResource.cs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/code/UpdatePSResource.cs b/src/code/UpdatePSResource.cs
index 8456464c1..cc981cdb4 100644
--- a/src/code/UpdatePSResource.cs
+++ b/src/code/UpdatePSResource.cs
@@ -199,7 +199,7 @@ protected override void ProcessRecord()
                 nugetVersion: nugetVersion,
                 versionType: versionType,
                 versionString: Version,
-                prerelease: latestInstalledIsPrerelease,
+                prerelease: latestInstalledIsPrerelease || Prerelease,
                 repository: Repository,
                 acceptLicense: AcceptLicense,
                 quiet: Quiet,
@@ -257,7 +257,7 @@ private string[] ProcessPackageNames(
             VersionType versionType,
             out bool latestInstalledIsPrerelease)
         {
-            latestInstalledIsPrerelease = Prerelease;
+            latestInstalledIsPrerelease = false;
 
             namesToProcess = Utils.ProcessNameWildcards(
                 pkgNames: namesToProcess,
@@ -331,7 +331,7 @@ private string[] ProcessPackageNames(
                 nugetVersion: nuGetVersion,
                 versionType: versionType,
                 version: Version,
-                prerelease: latestInstalledIsPrerelease,
+                prerelease: latestInstalledIsPrerelease || Prerelease,
                 tag: null,
                 repository: Repository,
                 includeDependencies: !SkipDependencyCheck))

From b2f62802c9bb2ec65f39ba08cdfb87e5bed6e81c Mon Sep 17 00:00:00 2001
From: alerickson <25858831+alerickson@users.noreply.github.com>
Date: Mon, 31 Jul 2023 22:51:34 -0700
Subject: [PATCH 3/3] Add test

---
 .../UpdatePSResourceV2Tests.ps1                | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/test/UpdatePSResourceTests/UpdatePSResourceV2Tests.ps1 b/test/UpdatePSResourceTests/UpdatePSResourceV2Tests.ps1
index 4bc2683f4..0141e3e30 100644
--- a/test/UpdatePSResourceTests/UpdatePSResourceV2Tests.ps1
+++ b/test/UpdatePSResourceTests/UpdatePSResourceV2Tests.ps1
@@ -172,6 +172,24 @@ Describe 'Test HTTP Update-PSResource for V2 Server Protocol' -tags 'CI' {
         $isPkgUpdated | Should -Be $true
     }
 
+    It "Update resource to explicit prerelease version using NuGet syntax" {
+        Install-PSResource -Name $testModuleName -Version "1.0.0.0" -Repository $PSGalleryName -TrustRepository
+        Update-PSResource -Name $testModuleName -Version "[5.2.5-alpha001]" -Prerelease -Repository $PSGalleryName -TrustRepository
+        $res = Get-InstalledPSResource -Name $testModuleName
+        $res | Should -Not -BeNullOrEmpty
+        $isPkgUpdated = $false
+        foreach ($pkg in $res)
+        {
+            if ([System.Version]$pkg.Version -eq [System.Version]"5.2.5")
+            {
+                $pkg.Prerelease | Should -Be "alpha001"
+                $isPkgUpdated = $true
+            }
+        }
+
+        $isPkgUpdated | Should -Be $true
+    }
+
     It "Update prerelease version to a higher prerelease version not using -Prerelease parameter" {
         Install-PSResource -Name $testModuleName3 -Version "0.0.99-beta1" -Repository $PSGalleryName -TrustRepository
         Update-PSResource -Name $testModuleName3 -Repository $PSGalleryName -TrustRepository