From fafdaa522ff2a3888dfceb0ab56911c4f8cdf48d Mon Sep 17 00:00:00 2001
From: Bob Arnson <bob@firegiant.com>
Date: Wed, 21 Jan 2026 21:20:40 -0500
Subject: Allow patched package to be uninstalled.

Normally, a patched package is detected as superseded and therefore a
normal uninstall takes no action. This change looks for applied patches
and allows a normal uninstall to remove the package.

Fixes https://github.com/wixtoolset/issues/issues/6350
---
 .../BundleAv1_0_1/BundleAv1_0_1.wixproj            | 19 +++++++++++++++++
 .../BundleAv1_0_1/BundleAv1_0_1.wxs                | 12 +++++++++++
 .../PatchAMinor/PatchAMinor.wixproj                | 12 +++++++++++
 .../SlipstreamTests/PatchAMinor/PatchAMinor.wxs    | 23 +++++++++++++++++++++
 .../burn/WixToolsetTest.BurnE2E/SlipstreamTests.cs | 24 +++++++++++++++++++++-
 5 files changed, 89 insertions(+), 1 deletion(-)
 create mode 100644 src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wixproj
 create mode 100644 src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wxs
 create mode 100644 src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wixproj
 create mode 100644 src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wxs

(limited to 'src/test/burn')

diff --git a/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wixproj b/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wixproj
new file mode 100644
index 00000000..ac9cf71e
--- /dev/null
+++ b/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wixproj
@@ -0,0 +1,19 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+  <PropertyGroup>
+    <OutputType>Bundle</OutputType>
+    <UpgradeCode>{62C28DAF-A13E-4F55-ACA1-FB843630789C}</UpgradeCode>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="..\..\Templates\Bundle.wxs" Link="Bundle.wxs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\PackageAv1\PackageAv1.wixproj" />
+    <ProjectReference Include="..\PatchAMinor\PatchAMinor.wixproj" />
+    <ProjectReference Include="..\..\TestBA\TestBAWixlib\testbawixlib.wixproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="WixToolset.BootstrapperApplications.wixext" />
+    <PackageReference Include="WixToolset.NetFx.wixext" />
+  </ItemGroup>
+</Project>
diff --git a/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wxs b/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wxs
new file mode 100644
index 00000000..a14383d3
--- /dev/null
+++ b/src/test/burn/TestData/SlipstreamTests/BundleAv1_0_1/BundleAv1_0_1.wxs
@@ -0,0 +1,12 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+  <Fragment>    
+    <PackageGroup Id="BundlePackages">
+      <MsiPackage Id="PackageA" SourceFile="$(var.PackageAv1.TargetPath)" Compressed="no">
+        <SlipstreamMsp Id="PatchAMinor" />
+      </MsiPackage>
+      <MspPackage Id="PatchAMinor" SourceFile="$(var.PatchAMinor.TargetPath)" Compressed="no" />
+    </PackageGroup>
+  </Fragment>
+</Wix>
diff --git a/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wixproj b/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wixproj
new file mode 100644
index 00000000..3deb2263
--- /dev/null
+++ b/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wixproj
@@ -0,0 +1,12 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+<Project Sdk="WixToolset.Sdk">
+  <PropertyGroup>
+    <OutputType>Patch</OutputType>
+    <TargetExt>.msp</TargetExt>
+    <SuppressSpecificWarnings>1079</SuppressSpecificWarnings>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\PackageAv1\PackageAv1.wixproj" />
+    <ProjectReference Include="..\PackageAv1_0_1\PackageAv1_0_1.wixproj" />
+  </ItemGroup>
+</Project>
diff --git a/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wxs b/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wxs
new file mode 100644
index 00000000..0f4abd2b
--- /dev/null
+++ b/src/test/burn/TestData/SlipstreamTests/PatchAMinor/PatchAMinor.wxs
@@ -0,0 +1,23 @@
+<!-- Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information. -->
+
+<?ifndef TestVersion?>
+<?define TestVersion = 1.0.0.0?>
+<?endif?>
+
+<Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
+    <Patch AllowRemoval="yes" Classification="Update" Description="Patch A minor upgrade in test $(var.TestGroupName)" DisplayName="$(var.TestGroupName) - Patch A minor upgrade" Manufacturer="Example Corporation" MinorUpdateTargetRTM="yes">
+        <Media Id="100" Cabinet="PatchA" EmbedCab="yes">
+            <PatchBaseline
+              Id="PatchA"
+              BaselineFile="$(var.PackageAv1.TargetDir)$(var.PackageAv1.TargetName).wixpdb"
+              UpdateFile="$(var.PackageAv1_0_1.TargetDir)$(var.PackageAv1_0_1.TargetName).wixpdb"
+            />
+        </Media>
+
+        <PatchFamily Id="A" Version="$(var.TestVersion)" Supersede="yes">
+          <ComponentRef Id="RegistryComponent" />
+          <PropertyRef Id="TestVersion" />
+          <PropertyRef Id="ProductVersion" />
+        </PatchFamily>
+    </Patch>
+</Wix>
diff --git a/src/test/burn/WixToolsetTest.BurnE2E/SlipstreamTests.cs b/src/test/burn/WixToolsetTest.BurnE2E/SlipstreamTests.cs
index d07e80f1..d4cf447d 100644
--- a/src/test/burn/WixToolsetTest.BurnE2E/SlipstreamTests.cs
+++ b/src/test/burn/WixToolsetTest.BurnE2E/SlipstreamTests.cs
@@ -18,7 +18,7 @@ namespace WixToolsetTest.BurnE2E
         private const string V101 = "1.0.1.0";
 
         [RuntimeFact]
-        public void CanInstallBundleWithSlipstreamedPatchThenRemoveIt()
+        public void CanInstallBundleWithSlipstreamedSmallUpdatePatchThenRemoveIt()
         {
             var testRegistryValue = "PackageA";
 
@@ -39,6 +39,28 @@ namespace WixToolsetTest.BurnE2E
             packageAv1.VerifyTestRegistryRootDeleted();
         }
 
+        [RuntimeFact]
+        public void CanInstallBundleWithSlipstreamedMinorUpgradePatchThenRemoveIt()
+        {
+            var testRegistryValue = "PackageA";
+
+            var packageAv1 = this.CreatePackageInstaller("PackageAv1");
+            var bundleA = this.CreateBundleInstaller("BundleAv1_0_1");
+
+            var packageAv1SourceCodeInstalled = packageAv1.GetInstalledFilePath("Package.wxs");
+            Assert.False(File.Exists(packageAv1SourceCodeInstalled), $"PackageAv1 payload should not be there on test start: {packageAv1SourceCodeInstalled}");
+
+            bundleA.Install();
+            bundleA.VerifyRegisteredAndInPackageCache();
+            Assert.True(File.Exists(packageAv1SourceCodeInstalled), String.Concat("Should have found PackageAv1 payload installed at: ", packageAv1SourceCodeInstalled));
+            packageAv1.VerifyTestRegistryValue(testRegistryValue, V101);
+
+            bundleA.Uninstall();
+            bundleA.VerifyUnregisteredAndRemovedFromPackageCache();
+            Assert.False(File.Exists(packageAv1SourceCodeInstalled), String.Concat("PackageAv1 payload should have been removed by uninstall from: ", packageAv1SourceCodeInstalled));
+            packageAv1.VerifyTestRegistryRootDeleted();
+        }
+
         /// <summary>
         /// BundleA installs PackageA with slipstreamed PatchA.
         /// BundleOnlyPatchA is installed which contains PatchA (which should be a no-op).
-- 
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