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test: add duplicate detection tests for issue #4131
Added 5 unit tests to verify the duplicate detection logic works correctly: - Package.GetHash() returns same value for identical packages - Package.GetHash() returns different values for different packages - Package.GetHash() differs for same package from different managers - Simulation test showing how multiple UpdateAll() calls are handled Tests mock the UAC waiting scenario where operations remain in queue, verifying that the duplicate detection prevents creating multiple operations for the same package (Manager + Source + PackageID).
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‎src/UniGetUI.PackageEngine.Serializable.Tests/TestDuplicateUpdateDetection.cs‎

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using NSubstitute;
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using UniGetUI.Interface.Enums;
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using UniGetUI.PackageEngine.Interfaces;
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using UniGetUI.PackageEngine.PackageClasses;
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namespace UniGetUI.PackageEngine.Tests;
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/// <summary>
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/// Tests for duplicate detection in update operations (Issue #4131).
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/// These tests verify the logic used in AppOperationHelper.UpdateAll() and UpdateAllForManager()
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/// to prevent multiple update operations for the same package from being queued simultaneously.
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/// </summary>
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public class TestDuplicateUpdateDetection
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{
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/// <summary>
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/// Test that verifies Package.GetHash() returns the same value for identical packages.
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/// This is the core mechanism used to detect duplicate operations in the queue.
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///
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/// Background: Issue #4131 - When unattended updates trigger repeatedly while UAC prompts
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/// are pending, UpdateAll() was creating dozens of duplicate operations for the same package.
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/// The fix uses GetHash() to check if an operation for a package already exists in the queue.
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/// </summary>
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[Fact]
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public void GetHash_ShouldReturnSameValue_ForIdenticalPackages()
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{
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// Arrange - Create mock manager and source
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// Note: We use the same instances to ensure consistent hashing
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var mockManager = Substitute.For<IPackageManager>();
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mockManager.Name.Returns("TestManager");
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var mockSource = Substitute.For<IManagerSource>();
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mockSource.Name.Returns("TestSource");
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// Create two package instances with identical identity (same manager, source, and ID)
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var package1 = new Package(
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name: "TestPackage",
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id: "test.package.id",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager
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);
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var package2 = new Package(
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name: "TestPackage",
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id: "test.package.id",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager
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);
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// Act - Get hash for both packages
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long hash1 = package1.GetHash();
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long hash2 = package2.GetHash();
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// Assert - Hashes must be equal for the duplicate detection to work
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Assert.Equal(hash1, hash2);
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}
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/// <summary>
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/// Test that verifies Package.GetHash() returns different values for different packages.
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/// This ensures the duplicate detection doesn't falsely match unrelated packages.
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/// </summary>
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[Fact]
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public void GetHash_ShouldReturnDifferentValues_ForDifferentPackages()
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{
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// Arrange
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var mockManager = Substitute.For<IPackageManager>();
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mockManager.Name.Returns("TestManager");
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var mockSource = Substitute.For<IManagerSource>();
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mockSource.Name.Returns("TestSource");
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// Create packages with different IDs
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var package1 = new Package(
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name: "TestPackage1",
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id: "test.package.one",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager
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);
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var package2 = new Package(
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name: "TestPackage2",
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id: "test.package.two",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager
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);
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// Act
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long hash1 = package1.GetHash();
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long hash2 = package2.GetHash();
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// Assert - Hashes must be different so we don't skip legitimate different packages
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Assert.NotEqual(hash1, hash2);
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}
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/// <summary>
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/// Test that verifies packages from different managers have different hashes.
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/// The duplicate detection must consider the package manager as part of identity.
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/// </summary>
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[Fact]
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public void GetHash_ShouldDiffer_ForSamePackageFromDifferentManagers()
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{
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// Arrange - Create two different managers
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var mockManager1 = Substitute.For<IPackageManager>();
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mockManager1.Name.Returns("WinGet");
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var mockManager2 = Substitute.For<IPackageManager>();
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mockManager2.Name.Returns("Chocolatey");
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var mockSource = Substitute.For<IManagerSource>();
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mockSource.Name.Returns("TestSource");
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// Same package ID from different managers
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var packageFromWinGet = new Package(
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name: "TestPackage",
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id: "test.package",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager1
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);
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var packageFromChoco = new Package(
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name: "TestPackage",
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id: "test.package",
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version: "1.0.0",
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source: mockSource,
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manager: mockManager2
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);
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// Act
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long hashWinGet = packageFromWinGet.GetHash();
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long hashChoco = packageFromChoco.GetHash();
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// Assert - Must be different because they're from different managers
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Assert.NotEqual(hashWinGet, hashChoco);
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}
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/// <summary>
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/// Test simulating the scenario where multiple UpdateAll() calls should detect duplicates.
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/// This represents what happens when auto-updates trigger while operations are queued.
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/// </summary>
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[Fact]
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public void SimulateDuplicateDetection_MultipleIdenticalPackages_ShouldHaveSameHash()
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{
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// Arrange - Simulate receiving same package multiple times from UpgradablePackagesLoader
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var mockManager = Substitute.For<IPackageManager>();
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mockManager.Name.Returns("WinGet");
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var mockSource = Substitute.For<IManagerSource>();
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mockSource.Name.Returns("winget");
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// Simulate UpdateAll() being called 3 times, each time getting "same" package
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var packagesFromFirstCall = new Package(
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name: "Git",
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id: "Git.Git",
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version: "2.40.0",
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source: mockSource,
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manager: mockManager
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);
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var packagesFromSecondCall = new Package(
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name: "Git",
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id: "Git.Git",
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version: "2.40.0",
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source: mockSource,
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manager: mockManager
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);
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var packagesFromThirdCall = new Package(
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name: "Git",
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id: "Git.Git",
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version: "2.40.0",
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source: mockSource,
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manager: mockManager
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);
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// Act - Get hashes that would be used for duplicate detection
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var hash1 = packagesFromFirstCall.GetHash();
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var hash2 = packagesFromSecondCall.GetHash();
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var hash3 = packagesFromThirdCall.GetHash();
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// Assert - All three should have the same hash, allowing duplicate detection
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Assert.Equal(hash1, hash2);
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Assert.Equal(hash2, hash3);
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Assert.Equal(hash1, hash3);
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// In the actual implementation, the second and third calls would find
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// an existing operation with matching hash and skip creating duplicates
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}
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}
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‎src/UniGetUI.PackageEngine.Serializable.Tests/UniGetUI.PackageEngine.Serializable.Tests.csproj‎

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<ItemGroup>
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<PackageReference Include="coverlet.collector" Version="6.0.4"/>
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<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
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<PackageReference Include="NSubstitute" Version="5.3.0" />
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<PackageReference Include="xunit" Version="2.9.3"/>
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<PackageReference Include="xunit.runner.visualstudio" Version="3.1.4">
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<PrivateAssets>all</PrivateAssets>
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<ItemGroup>
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<ProjectReference Include="..\UniGetUI.PackageEngine.Serializable\UniGetUI.PackageEngine.Serializable.csproj" />
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<ProjectReference Include="..\UniGetUI.PackageEngine.PackageManagerClasses\UniGetUI.PackageEngine.Classes.csproj" />
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<ProjectReference Include="..\UniGetUI.PAckageEngine.Interfaces\UniGetUI.PackageEngine.Interfaces.csproj" />
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<ProjectReference Include="..\UniGetUI.Interface.Enums\UniGetUI.Interface.Enums.csproj" />
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</ItemGroup>
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</Project>

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