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XunitTestAssemblyRunnerTests.cs
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XunitTestAssemblyRunnerTests.cs
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using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using Xunit;
using Xunit.Abstractions;
using Xunit.Sdk;
using ParallelAlgorithm = Xunit.ParallelAlgorithm;
public class XunitTestAssemblyRunnerTests
{
public class GetTestFrameworkDisplayName
{
[Fact]
public static void IsXunit()
{
var runner = TestableXunitTestAssemblyRunner.Create();
var result = runner.GetTestFrameworkDisplayName();
Assert.StartsWith("xUnit.net ", result);
}
}
public class GetTestFrameworkEnvironment
{
[Fact]
public static void Default()
{
var runner = TestableXunitTestAssemblyRunner.Create();
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith($"[collection-per-class, parallel ({Environment.ProcessorCount} threads)]", result);
}
[Fact]
public static void Attribute_NonParallel()
{
var attribute = Mocks.CollectionBehaviorAttribute(disableTestParallelization: true);
var assembly = Mocks.TestAssembly(new[] { attribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, non-parallel]", result);
}
[Fact]
public static void Attribute_MaxThreads()
{
var attribute = Mocks.CollectionBehaviorAttribute(maxParallelThreads: 3);
var assembly = Mocks.TestAssembly(new[] { attribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, parallel (3 threads)]", result);
}
[Fact]
public static void Attribute_Unlimited()
{
var attribute = Mocks.CollectionBehaviorAttribute(maxParallelThreads: -1);
var assembly = Mocks.TestAssembly(new[] { attribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, parallel (unlimited threads)]", result);
}
[Theory]
[InlineData(CollectionBehavior.CollectionPerAssembly, "collection-per-assembly")]
[InlineData(CollectionBehavior.CollectionPerClass, "collection-per-class")]
public static void Attribute_CollectionBehavior(CollectionBehavior behavior, string expectedDisplayText)
{
var attribute = Mocks.CollectionBehaviorAttribute(behavior, disableTestParallelization: true);
var assembly = Mocks.TestAssembly(new[] { attribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith($"[{expectedDisplayText}, non-parallel]", result);
}
[Fact]
public static void Attribute_CustomCollectionFactory()
{
var factoryType = typeof(MyTestCollectionFactory);
var attr = Mocks.CollectionBehaviorAttribute(factoryType.FullName, factoryType.Assembly.FullName, disableTestParallelization: true);
var assembly = Mocks.TestAssembly(new[] { attr });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[My Factory, non-parallel]", result);
}
class MyTestCollectionFactory : IXunitTestCollectionFactory
{
public string DisplayName { get { return "My Factory"; } }
public MyTestCollectionFactory(ITestAssembly assembly) { }
public ITestCollection Get(ITypeInfo testClass)
{
throw new NotImplementedException();
}
}
[Fact]
public static void TestOptions_NonParallel()
{
var options = TestFrameworkOptions.ForExecution();
options.SetDisableParallelization(true);
var runner = TestableXunitTestAssemblyRunner.Create(executionOptions: options);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, non-parallel]", result);
}
[Fact]
public static void TestOptions_MaxThreads()
{
var options = TestFrameworkOptions.ForExecution();
options.SetMaxParallelThreads(3);
var runner = TestableXunitTestAssemblyRunner.Create(executionOptions: options);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, parallel (3 threads)]", result);
}
[Fact]
public static void TestOptions_Unlimited()
{
var options = TestFrameworkOptions.ForExecution();
options.SetMaxParallelThreads(-1);
var runner = TestableXunitTestAssemblyRunner.Create(executionOptions: options);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, parallel (unlimited threads)]", result);
}
[Fact]
public static void TestOptionsOverrideAttribute()
{
var attribute = Mocks.CollectionBehaviorAttribute(disableTestParallelization: true, maxParallelThreads: 127);
var options = TestFrameworkOptions.ForExecution();
options.SetDisableParallelization(false);
options.SetMaxParallelThreads(3);
var assembly = Mocks.TestAssembly(new[] { attribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly, executionOptions: options);
var result = runner.GetTestFrameworkEnvironment();
Assert.EndsWith("[collection-per-class, parallel (3 threads)]", result);
}
}
public class RunAsync
{
[Fact]
public static async void Parallel_SingleThread_Aggressive()
{
var passing = Mocks.XunitTestCase<ClassUnderTest>("Passing");
var other = Mocks.XunitTestCase<ClassUnderTest>("Other");
var options = TestFrameworkOptions.ForExecution();
options.SetMaxParallelThreads(1);
options.SetParallelAlgorithm(ParallelAlgorithm.Aggressive);
var runner = TestableXunitTestAssemblyRunner.Create(testCases: new[] { passing, other }, executionOptions: options);
await runner.RunAsync();
var threadIDs = runner.TestCasesRun.Select(x => x.Item1).ToList();
Assert.Equal(threadIDs[0], threadIDs[1]);
}
[Fact]
public static async void NonParallel()
{
var passing = Mocks.XunitTestCase<ClassUnderTest>("Passing");
var other = Mocks.XunitTestCase<ClassUnderTest>("Other");
var options = TestFrameworkOptions.ForExecution();
options.SetDisableParallelization(true);
var runner = TestableXunitTestAssemblyRunner.Create(testCases: new[] { passing, other }, executionOptions: options);
await runner.RunAsync();
var threadIDs = runner.TestCasesRun.Select(x => x.Item1).ToList();
Assert.Equal(threadIDs[0], threadIDs[1]);
}
}
public class TestCaseOrderer
{
[Fact]
public static void CanSetTestCaseOrdererInAssemblyAttribute()
{
var ordererAttribute = Mocks.TestCaseOrdererAttribute<MyTestCaseOrderer>();
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<MyTestCaseOrderer>(runner.TestCaseOrderer);
}
class MyTestCaseOrderer : ITestCaseOrderer
{
public IEnumerable<TTestCase> OrderTestCases<TTestCase>(IEnumerable<TTestCase> testCases) where TTestCase : ITestCase
{
throw new NotImplementedException();
}
}
[Fact]
public static void SettingUnknownTestCaseOrderLogsDiagnosticMessage()
{
var ordererAttribute = Mocks.TestCaseOrdererAttribute("UnknownType", "UnknownAssembly");
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<DefaultTestCaseOrderer>(runner.TestCaseOrderer);
var diagnosticMessage = Assert.Single(runner.DiagnosticMessages.Cast<IDiagnosticMessage>());
Assert.Equal("Could not find type 'UnknownType' in UnknownAssembly for assembly-level test case orderer", diagnosticMessage.Message);
}
[CulturedFact("en-US")]
public static void SettingTestCaseOrdererWithThrowingConstructorLogsDiagnosticMessage()
{
var ordererAttribute = Mocks.TestCaseOrdererAttribute<MyCtorThrowingTestCaseOrderer>();
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<DefaultTestCaseOrderer>(runner.TestCaseOrderer);
var diagnosticMessage = Assert.Single(runner.DiagnosticMessages.Cast<IDiagnosticMessage>());
Assert.StartsWith("Assembly-level test case orderer 'XunitTestAssemblyRunnerTests+TestCaseOrderer+MyCtorThrowingTestCaseOrderer' threw 'System.DivideByZeroException' during construction: Attempted to divide by zero.", diagnosticMessage.Message);
}
class MyCtorThrowingTestCaseOrderer : ITestCaseOrderer
{
public MyCtorThrowingTestCaseOrderer()
{
throw new DivideByZeroException();
}
public IEnumerable<TTestCase> OrderTestCases<TTestCase>(IEnumerable<TTestCase> testCases) where TTestCase : ITestCase
{
return Enumerable.Empty<TTestCase>();
}
}
}
public class TestCollectionOrderer
{
[Fact]
public static void CanSetTestCollectionOrdererInAssemblyAttribute()
{
var ordererAttribute = Mocks.TestCollectionOrdererAttribute<MyTestCollectionOrderer>();
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<MyTestCollectionOrderer>(runner.TestCollectionOrderer);
}
class MyTestCollectionOrderer : ITestCollectionOrderer
{
public IEnumerable<ITestCollection> OrderTestCollections(IEnumerable<ITestCollection> TestCollections)
{
return TestCollections.OrderByDescending(c => c.DisplayName);
}
}
[Fact]
public static void SettingUnknownTestCollectionOrderLogsDiagnosticMessage()
{
var ordererAttribute = Mocks.TestCollectionOrdererAttribute("UnknownType", "UnknownAssembly");
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<DefaultTestCollectionOrderer>(runner.TestCollectionOrderer);
var diagnosticMessage = Assert.Single(runner.DiagnosticMessages.Cast<IDiagnosticMessage>());
Assert.Equal("Could not find type 'UnknownType' in UnknownAssembly for assembly-level test collection orderer", diagnosticMessage.Message);
}
[CulturedFact("en-US")]
public static void SettingTestCollectionOrdererWithThrowingConstructorLogsDiagnosticMessage()
{
var ordererAttribute = Mocks.TestCollectionOrdererAttribute<MyCtorThrowingTestCollectionOrderer>();
var assembly = Mocks.TestAssembly(new[] { ordererAttribute });
var runner = TestableXunitTestAssemblyRunner.Create(assembly: assembly);
runner.Initialize();
Assert.IsType<DefaultTestCaseOrderer>(runner.TestCaseOrderer);
var diagnosticMessage = Assert.Single(runner.DiagnosticMessages.Cast<IDiagnosticMessage>());
Assert.StartsWith("Assembly-level test collection orderer 'XunitTestAssemblyRunnerTests+TestCollectionOrderer+MyCtorThrowingTestCollectionOrderer' threw 'System.DivideByZeroException' during construction: Attempted to divide by zero.", diagnosticMessage.Message);
}
class MyCtorThrowingTestCollectionOrderer : ITestCollectionOrderer
{
public MyCtorThrowingTestCollectionOrderer()
{
throw new DivideByZeroException();
}
public IEnumerable<ITestCollection> OrderTestCollections(IEnumerable<ITestCollection> testCollections)
{
return Enumerable.Empty<ITestCollection>();
}
}
}
class ClassUnderTest
{
[Fact]
public void Passing() { Thread.Sleep(0); }
[Fact]
public void Other() { Thread.Sleep(0); }
}
class TestableXunitTestAssemblyRunner : XunitTestAssemblyRunner
{
public List<IMessageSinkMessage> DiagnosticMessages;
public ConcurrentBag<Tuple<int, IEnumerable<IXunitTestCase>>> TestCasesRun = new ConcurrentBag<Tuple<int, IEnumerable<IXunitTestCase>>>();
TestableXunitTestAssemblyRunner(
ITestAssembly testAssembly,
IEnumerable<IXunitTestCase> testCases,
List<IMessageSinkMessage> diagnosticMessages,
IMessageSink executionMessageSink,
ITestFrameworkExecutionOptions executionOptions)
: base(testAssembly, testCases, SpyMessageSink.Create(messages: diagnosticMessages), executionMessageSink, executionOptions)
{
DiagnosticMessages = diagnosticMessages;
}
public static TestableXunitTestAssemblyRunner Create(
ITestAssembly assembly = null,
IXunitTestCase[] testCases = null,
ITestFrameworkExecutionOptions executionOptions = null)
{
if (testCases == null)
testCases = new[] { Mocks.XunitTestCase<ClassUnderTest>("Passing") };
return new TestableXunitTestAssemblyRunner(
assembly ?? testCases.First().TestMethod.TestClass.TestCollection.TestAssembly,
testCases,
new List<IMessageSinkMessage>(),
SpyMessageSink.Create(),
executionOptions ?? TestFrameworkOptions.ForExecution()
);
}
public new ITestCaseOrderer TestCaseOrderer
{
get { return base.TestCaseOrderer; }
}
public new ITestCollectionOrderer TestCollectionOrderer
{
get { return base.TestCollectionOrderer; }
set { base.TestCollectionOrderer = value; }
}
public new string GetTestFrameworkDisplayName()
{
return base.GetTestFrameworkDisplayName();
}
public new string GetTestFrameworkEnvironment()
{
return base.GetTestFrameworkEnvironment();
}
public new void Initialize()
{
base.Initialize();
}
protected override Task<RunSummary> RunTestCollectionAsync(
IMessageBus messageBus,
ITestCollection testCollection,
IEnumerable<IXunitTestCase> testCases,
CancellationTokenSource cancellationTokenSource)
{
TestCasesRun.Add(Tuple.Create(Thread.CurrentThread.ManagedThreadId, testCases));
Thread.Sleep(5); // Hold onto the worker thread long enough to ensure tests all get spread around
return Task.FromResult(new RunSummary());
}
}
}