398 lines
21 KiB
C#
398 lines
21 KiB
C#
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// Copyright (C) 2026, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Threading;
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using System.Threading.Tasks;
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using Duplicati.Library.DynamicLoader;
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using Duplicati.Library.Interface;
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using Duplicati.Library.Main;
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using Duplicati.Library.Main.Operation;
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using Duplicati.Library.Main.Operation.Restore;
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using NUnit.Framework;
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using Assert = NUnit.Framework.Legacy.ClassicAssert;
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#nullable enable
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namespace Duplicati.UnitTest
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{
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/// <summary>
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/// Tests for the <see cref="IRestoreCallbackModule"/> restore hook interface and its
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/// wiring in <see cref="RestoreHandler"/> / the restore FileProcessor.
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/// </summary>
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[NonParallelizable]
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public class RestoreCallbackModuleTests : BasicSetupHelper
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{
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/// <summary>
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/// A minimal <see cref="IRestoreCallbackModule"/> implementation that records calls
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/// on the instance, used for the dispatch-helper unit tests.
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/// </summary>
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private sealed class FakeRestoreCallbackModule : IRestoreCallbackModule, IGenericPriorityModule
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{
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public string Key { get; set; } = "fake";
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public string DisplayName => "Fake";
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public string Description => "Fake restore callback module";
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public bool LoadAsDefault => false;
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public int Priority { get; set; }
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public IList<ICommandLineArgument> SupportedCommands => new List<ICommandLineArgument>();
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public List<(string files, long version, DateTime timestamp)> PrepareCalls { get; } = new();
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public int BulkStartCalls { get; set; }
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public List<(long version, string path, DateTime timestamp)> FileRestoredCalls { get; } = new();
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public Action<IList<string>>? OnPrepare { get; set; }
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public Action? OnBulk { get; set; }
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public Action<long, string>? OnFile { get; set; }
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public Task OnPreparePriorityFilesAsync(IList<string> priorityFiles, long version, DateTime backupTimestamp, CancellationToken cancellationToken)
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{
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PrepareCalls.Add((string.Join(",", priorityFiles), version, backupTimestamp));
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OnPrepare?.Invoke(priorityFiles);
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return Task.CompletedTask;
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}
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public Task OnBulkRestoreStartAsync(CancellationToken cancellationToken)
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{
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BulkStartCalls++;
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OnBulk?.Invoke();
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return Task.CompletedTask;
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}
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public Task OnFileRestoredAsync(long version, string path, DateTime backupTimestamp, CancellationToken cancellationToken)
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{
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FileRestoredCalls.Add((version, path, backupTimestamp));
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OnFile?.Invoke(version, path);
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return Task.CompletedTask;
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}
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public void Configure(IDictionary<string, string> commandlineOptions) { }
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}
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/// <summary>
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/// A module that is NOT a restore callback module, used to verify the dispatch
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/// helpers skip non-matching modules.
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/// </summary>
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private sealed class NonCallbackModule : IGenericModule
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{
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public string Key => "non-callback";
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public string DisplayName => "NonCallback";
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public string Description => "";
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public bool LoadAsDefault => false;
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public IList<ICommandLineArgument> SupportedCommands => new List<ICommandLineArgument>();
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public void Configure(IDictionary<string, string> commandlineOptions) { }
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task InvokePreparePriorityFilesCallsModulesAndAllowsMutationAsync()
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{
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var modA = new FakeRestoreCallbackModule { Key = "a" };
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var modB = new FakeRestoreCallbackModule { Key = "b" };
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modA.OnPrepare = list => list.Add("from-a");
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modB.OnPrepare = list => list.Remove("remove-me");
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var priorityFiles = new List<string> { "keep", "remove-me" };
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// Mix in a non-callback module to ensure it is skipped.
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const long expectedVersion = 7;
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var expectedTimestamp = new DateTime(2024, 1, 2, 3, 4, 5, DateTimeKind.Utc);
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await RestoreHandler.InvokePreparePriorityFilesAsync(new IGenericModule[] { new NonCallbackModule(), modA, modB }, priorityFiles, expectedVersion, expectedTimestamp, CancellationToken.None);
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// Both callback modules were invoked exactly once, in order.
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Assert.AreEqual(1, modA.PrepareCalls.Count);
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Assert.AreEqual(1, modB.PrepareCalls.Count);
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// The version and backup timestamp were forwarded to the modules.
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Assert.AreEqual(expectedVersion, modA.PrepareCalls[0].version);
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Assert.AreEqual(expectedTimestamp, modA.PrepareCalls[0].timestamp);
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Assert.AreEqual(expectedVersion, modB.PrepareCalls[0].version);
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Assert.AreEqual(expectedTimestamp, modB.PrepareCalls[0].timestamp);
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// modA saw the original list, modB saw the list after modA mutated it.
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Assert.AreEqual("keep,remove-me", modA.PrepareCalls[0].files);
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Assert.AreEqual("keep,remove-me,from-a", modB.PrepareCalls[0].files);
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// The shared list reflects both mutations.
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Assert.That(priorityFiles, Is.EqualTo(new[] { "keep", "from-a" }));
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task InvokePreparePriorityFilesIsolatedFromThrowingModulesAsync()
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{
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var throwing = new FakeRestoreCallbackModule { Key = "throw", OnPrepare = _ => throw new InvalidOperationException("boom") };
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var after = new FakeRestoreCallbackModule { Key = "after" };
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var priorityFiles = new List<string> { "a" };
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await RestoreHandler.InvokePreparePriorityFilesAsync(new IGenericModule[] { throwing, after }, priorityFiles, 0, DateTime.MinValue, CancellationToken.None);
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// The throwing module did not abort dispatch to the next module.
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Assert.AreEqual(1, after.PrepareCalls.Count);
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task InvokeBulkRestoreStartCallsAllModulesInOrderAsync()
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{
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var order = new List<string>();
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var modA = new FakeRestoreCallbackModule { Key = "a", OnBulk = () => order.Add("a") };
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var modB = new FakeRestoreCallbackModule { Key = "b", OnBulk = () => order.Add("b") };
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await RestoreHandler.InvokeBulkRestoreStartAsync(new IGenericModule[] { new NonCallbackModule(), modA, modB }, CancellationToken.None);
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Assert.AreEqual(1, modA.BulkStartCalls);
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Assert.AreEqual(1, modB.BulkStartCalls);
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Assert.That(order, Is.EqualTo(new[] { "a", "b" }));
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task InvokeFileRestoredPassesVersionAndPathAsync()
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{
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var mod = new FakeRestoreCallbackModule();
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const long expectedVersion = 2;
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var expectedTimestamp = new DateTime(2023, 6, 15, 12, 0, 0, DateTimeKind.Utc);
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await RestoreHandler.InvokeFileRestoredAsync(new IGenericModule[] { new NonCallbackModule(), mod }, expectedVersion, "/some/path/file.txt", expectedTimestamp, CancellationToken.None);
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Assert.AreEqual(1, mod.FileRestoredCalls.Count);
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Assert.AreEqual(expectedVersion, mod.FileRestoredCalls[0].version);
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Assert.AreEqual("/some/path/file.txt", mod.FileRestoredCalls[0].path);
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Assert.AreEqual(expectedTimestamp, mod.FileRestoredCalls[0].timestamp);
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task InvokeFileRestoredIsolatedFromThrowingModulesAsync()
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{
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var throwing = new FakeRestoreCallbackModule { Key = "throw", OnFile = (_, _) => throw new InvalidOperationException("boom") };
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var after = new FakeRestoreCallbackModule { Key = "after" };
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await RestoreHandler.InvokeFileRestoredAsync(new IGenericModule[] { throwing, after }, 0, "/p", DateTime.MinValue, CancellationToken.None);
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Assert.AreEqual(1, after.FileRestoredCalls.Count);
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task DispatchHelpersAcceptNullModulesAsync()
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{
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// Passing null must not throw.
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await RestoreHandler.InvokePreparePriorityFilesAsync(null, new List<string>(), 0, DateTime.MinValue, CancellationToken.None);
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await RestoreHandler.InvokeBulkRestoreStartAsync(null, CancellationToken.None);
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await RestoreHandler.InvokeFileRestoredAsync(null, 0, "/p", DateTime.MinValue, CancellationToken.None);
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Assert.Pass();
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}
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// ----------------------------------------------------------------------------------
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// Integration tests: register a real module in the GenericLoader and run a restore.
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// ----------------------------------------------------------------------------------
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/// <summary>
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/// A restore-callback module that records invocations into static state. Static
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/// state is required because <see cref="GenericLoader.GetModule(string)"/> creates a
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/// fresh instance per operation, so the instance that runs during the restore is not
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/// the same instance the test registered.
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/// </summary>
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public class RecordingRestoreCallbackModule : IRestoreCallbackModule
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{
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public const string KEY = "test-restore-callback";
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public static readonly object RecordLock = new();
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public static List<(string files, long version, DateTime timestamp)> PrepareCalls { get; } = new();
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public static int BulkStartCalls;
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public static List<(long version, string path, DateTime timestamp)> FileRestoredCalls { get; } = new();
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public static void Reset()
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{
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lock (RecordLock)
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{
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PrepareCalls.Clear();
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BulkStartCalls = 0;
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FileRestoredCalls.Clear();
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}
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}
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public string Key => KEY;
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public string DisplayName => "Test Restore Callback";
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public string Description => "Records restore callback invocations for tests";
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public bool LoadAsDefault => false;
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public IList<ICommandLineArgument> SupportedCommands => new List<ICommandLineArgument>();
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public void Configure(IDictionary<string, string> commandlineOptions) { }
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public Task OnPreparePriorityFilesAsync(IList<string> priorityFiles, long version, DateTime backupTimestamp, CancellationToken cancellationToken)
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{
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lock (RecordLock)
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PrepareCalls.Add((string.Join("|", priorityFiles), version, backupTimestamp));
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return Task.CompletedTask;
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}
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public Task OnBulkRestoreStartAsync(CancellationToken cancellationToken)
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{
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lock (RecordLock)
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BulkStartCalls++;
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return Task.CompletedTask;
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}
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public Task OnFileRestoredAsync(long version, string path, DateTime backupTimestamp, CancellationToken cancellationToken)
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{
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lock (RecordLock)
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FileRestoredCalls.Add((version, path, backupTimestamp));
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return Task.CompletedTask;
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}
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}
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/// <summary>
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/// Registers <see cref="RecordingRestoreCallbackModule"/> into the static
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/// <see cref="GenericLoader"/> so it is discovered and activated during a restore
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/// operation (when enabled via <c>--enable-module</c>). Uses reflection because the
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/// loader's module table is not publicly writable.
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/// </summary>
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private static void RegisterRecordingModule()
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{
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var loaderType = typeof(GenericLoader);
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var loaderField = loaderType.GetField("_loader", BindingFlags.NonPublic | BindingFlags.Static)
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?? throw new InvalidOperationException("Could not find GenericLoader._loader");
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var lazy = loaderField.GetValue(null);
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var loaderSub = lazy!.GetType().GetProperty("Value")!.GetValue(lazy);
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var addModule = loaderSub!.GetType().GetMethod("AddModule", BindingFlags.Public | BindingFlags.Instance)
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?? throw new InvalidOperationException("Could not find AddModule on loader");
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addModule.Invoke(loaderSub, new object[] { new RecordingRestoreCallbackModule() });
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}
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[OneTimeSetUp]
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public void OneTimeSetup()
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{
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RegisterRecordingModule();
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}
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[Test]
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[Category("RestoreHandler")]
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public async Task RestoreCallbacksFireOnNewRestoreAsync()
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{
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RecordingRestoreCallbackModule.Reset();
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// Write two files, one of which we mark as a priority file via the restore
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// destination provider (priority files are derived from the target folder).
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var file1 = Path.Combine(this.DATAFOLDER, "file1.txt");
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var file2 = Path.Combine(this.DATAFOLDER, "file2.txt");
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File.WriteAllText(file1, "content-1");
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File.WriteAllText(file2, "content-2");
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var backupOptions = new Dictionary<string, string>(this.TestOptions);
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using (var c = new Controller("file://" + this.TARGETFOLDER, backupOptions, null))
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TestUtils.AssertResults(await c.BackupAsync(new[] { this.DATAFOLDER }));
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var restoreOptions = new Dictionary<string, string>(this.TestOptions)
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{
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["restore-path"] = this.RESTOREFOLDER,
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["restore-legacy"] = "false",
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["enable-module"] = RecordingRestoreCallbackModule.KEY,
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};
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var restoreStartedAt = DateTime.UtcNow;
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using (var c = new Controller("file://" + this.TARGETFOLDER, restoreOptions, null))
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TestUtils.AssertResults(await c.RestoreAsync(new[] { "*" }));
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// OnPreparePriorityFilesAsync is always called (even with an empty list).
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Assert.That(RecordingRestoreCallbackModule.PrepareCalls.Count, Is.GreaterThanOrEqualTo(1), "OnPreparePriorityFilesAsync should be invoked");
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// The reported version is 0 (newest backup) for the single restored version.
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Assert.AreEqual(0, RecordingRestoreCallbackModule.PrepareCalls[0].version, "Prepare should report version 0");
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// The reported backup timestamp is the newest backup's timestamp, created just before this restore.
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Assert.That(RecordingRestoreCallbackModule.PrepareCalls[0].timestamp, Is.GreaterThan(restoreStartedAt.AddMinutes(-5)).And.LessThan(DateTime.UtcNow.AddMinutes(1)),
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"Prepare should report a recent backup timestamp");
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// OnBulkRestoreStartAsync is called exactly once when the bulk restore starts.
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Assert.AreEqual(1, RecordingRestoreCallbackModule.BulkStartCalls, "OnBulkRestoreStartAsync should be invoked once");
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// OnFileRestoredAsync is called for each restored file on the new engine.
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Assert.That(RecordingRestoreCallbackModule.FileRestoredCalls.Count, Is.GreaterThanOrEqualTo(2), "OnFileRestoredAsync should be invoked for each restored file");
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// The reported version is 0 (newest backup) for the single restored version.
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Assert.IsTrue(RecordingRestoreCallbackModule.FileRestoredCalls.All(x => x.version == 0), "Restored files should report version 0");
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// The reported backup timestamp is recent (the backup was created just before this restore).
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Assert.IsTrue(RecordingRestoreCallbackModule.FileRestoredCalls.All(x => x.timestamp > restoreStartedAt.AddMinutes(-5) && x.timestamp < DateTime.UtcNow.AddMinutes(1)),
|
||
|
|
"Restored files should report a recent backup timestamp");
|
||
|
|
// The reported paths are within the restore folder.
|
||
|
|
Assert.IsTrue(RecordingRestoreCallbackModule.FileRestoredCalls.All(x => x.path.StartsWith(this.RESTOREFOLDER, StringComparison.OrdinalIgnoreCase)),
|
||
|
|
"Restored file paths should be under the restore folder");
|
||
|
|
}
|
||
|
|
|
||
|
|
[Test]
|
||
|
|
[Category("RestoreHandler")]
|
||
|
|
public async Task OnFileRestoredNotCalledOnLegacyRestoreAsync()
|
||
|
|
{
|
||
|
|
RecordingRestoreCallbackModule.Reset();
|
||
|
|
|
||
|
|
var file1 = Path.Combine(this.DATAFOLDER, "legacy-file.txt");
|
||
|
|
File.WriteAllText(file1, "legacy-content");
|
||
|
|
|
||
|
|
var backupOptions = new Dictionary<string, string>(this.TestOptions);
|
||
|
|
using (var c = new Controller("file://" + this.TARGETFOLDER, backupOptions, null))
|
||
|
|
TestUtils.AssertResults(await c.BackupAsync(new[] { this.DATAFOLDER }));
|
||
|
|
|
||
|
|
var restoreOptions = new Dictionary<string, string>(this.TestOptions)
|
||
|
|
{
|
||
|
|
["restore-path"] = this.RESTOREFOLDER,
|
||
|
|
["restore-legacy"] = "true",
|
||
|
|
["enable-module"] = RecordingRestoreCallbackModule.KEY,
|
||
|
|
};
|
||
|
|
|
||
|
|
using (var c = new Controller("file://" + this.TARGETFOLDER, restoreOptions, null))
|
||
|
|
TestUtils.AssertResults(await c.RestoreAsync(new[] { "*" }));
|
||
|
|
|
||
|
|
// OnPreparePriorityFilesAsync and OnBulkRestoreStartAsync are invoked on the legacy engine too.
|
||
|
|
Assert.That(RecordingRestoreCallbackModule.PrepareCalls.Count, Is.GreaterThanOrEqualTo(1), "OnPreparePriorityFilesAsync should be invoked on legacy restore");
|
||
|
|
Assert.AreEqual(1, RecordingRestoreCallbackModule.BulkStartCalls, "OnBulkRestoreStartAsync should be invoked once on legacy restore");
|
||
|
|
// OnFileRestoredAsync must NOT be called when --restore-legacy is set.
|
||
|
|
Assert.AreEqual(0, RecordingRestoreCallbackModule.FileRestoredCalls.Count, "OnFileRestoredAsync must not be called on legacy restore");
|
||
|
|
}
|
||
|
|
|
||
|
|
[Test]
|
||
|
|
[Category("RestoreHandler")]
|
||
|
|
public async Task RestoreCallbackReceivesEmptyPriorityListWhenNoPriorityFilesAsync()
|
||
|
|
{
|
||
|
|
RecordingRestoreCallbackModule.Reset();
|
||
|
|
|
||
|
|
var file1 = Path.Combine(this.DATAFOLDER, "nopriority.txt");
|
||
|
|
File.WriteAllText(file1, "no-priority-content");
|
||
|
|
|
||
|
|
var backupOptions = new Dictionary<string, string>(this.TestOptions);
|
||
|
|
using (var c = new Controller("file://" + this.TARGETFOLDER, backupOptions, null))
|
||
|
|
TestUtils.AssertResults(await c.BackupAsync(new[] { this.DATAFOLDER }));
|
||
|
|
|
||
|
|
var restoreOptions = new Dictionary<string, string>(this.TestOptions)
|
||
|
|
{
|
||
|
|
["restore-path"] = this.RESTOREFOLDER,
|
||
|
|
["restore-legacy"] = "false",
|
||
|
|
["enable-module"] = RecordingRestoreCallbackModule.KEY,
|
||
|
|
};
|
||
|
|
|
||
|
|
using (var c = new Controller("file://" + this.TARGETFOLDER, restoreOptions, null))
|
||
|
|
TestUtils.AssertResults(await c.RestoreAsync(new[] { "*" }));
|
||
|
|
|
||
|
|
// With no priority files, OnPreparePriorityFilesAsync is still called once with an empty list,
|
||
|
|
// and OnBulkRestoreStartAsync is called exactly once (the bulk restore starts immediately).
|
||
|
|
Assert.AreEqual(1, RecordingRestoreCallbackModule.PrepareCalls.Count, "OnPreparePriorityFilesAsync should be invoked exactly once");
|
||
|
|
Assert.AreEqual(string.Empty, RecordingRestoreCallbackModule.PrepareCalls[0].files, "Priority list should be empty");
|
||
|
|
Assert.AreEqual(1, RecordingRestoreCallbackModule.BulkStartCalls, "OnBulkRestoreStartAsync should be invoked once");
|
||
|
|
Assert.That(RecordingRestoreCallbackModule.FileRestoredCalls.Count, Is.GreaterThanOrEqualTo(1));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|