protected BaseTest(ILogAdapter extraLogging)
{
LogCapture = Logs.Capture();
TestLogging = Logs.ToMultiple(extraLogging, LogCapture);
TestLogger = TestLogging.Logger("");
BasicContext = new LdClientContext(new BasicConfiguration(Configuration.Default(BasicSdkKey), TestLogger),
Configuration.Default(""));
BasicTaskExecutor = new TaskExecutor("test-sender", TestLogger);
// The following line prevents intermittent test failures that happen only in .NET
// Framework, where background tasks (including calls to Task.Delay) are very excessively
// slow to start-- on the order of many seconds. The issue appears to be a long-standing
// one that is described here, where the very low default setting of ThreadPool.SetMinThreads
// causes new worker tasks to be severely throttled:
// http://joeduffyblog.com/2006/07/08/clr-thread-pool-injection-stuttering-problems/
//
// We've seen experimentally that this setting defaults to 2 when running the tests in .NET
// Framework, versus at least 12 when running them in .NET Core.
//
// It is theoretically possible for something similar to happen in a real application, but
// since that would affect all tasks in the application, we assume that developers would
// need to tune this parameter in any case, not only because of our SDK.
ThreadPool.SetMinThreads(100, 100);
}
/// <summary>
/// Use this constructor if you want to be able to send logs to the Xunit test output buffer.
/// Xunit will pass the <see cref="ITestOutputHelper"/> to the test subclass's constructor
/// if you declare a parameter of that type.
/// </summary>
/// <param name="testOutput"></param>
public BaseTest(ITestOutputHelper testOutput) : this()
{
_testLogging = Logs.ToMultiple(
Logs.ToMethod(testOutput.WriteLine),
_logCapture
);
_testLogger = _testLogging.Logger("");
}
/// <summary>
/// Default constructor - does not use the Xunit test output buffer.
/// </summary>
public BaseTest()
{
_logCapture = Logs.Capture();
_testLogging = _logCapture;
_testLogger = _testLogging.Logger("");
// The following line prevents intermittent test failures that can happen due to the low
// default setting of ThreadPool.SetMinThreads causing new worker tasks to be severely
// throttled: http://joeduffyblog.com/2006/07/08/clr-thread-pool-injection-stuttering-problems/
// This makes it difficult to test things such as timeouts. We believe it not to be a real
// issue in non-test scenarios, since the tests are starting and stopping an unusually large
// number of async tasks in a way that regular use of EventSource would not do.
ThreadPool.SetMinThreads(100, 100);
}
private IBigSegmentStore MakeStore()
{
var context = new LdClientContext(new BasicConfiguration("sdk-key", false, _testLogging.Logger("")),
LaunchDarkly.Sdk.Server.Configuration.Default("sdk-key"));
return(Configuration.StoreFactoryFunc(prefix).CreateBigSegmentStore(context));
}
/// <summary>
/// This constructor allows log output to be captured by Xunit. Simply declare a constructor
/// with the same <c>ITestOutputHelper</c> parameter for your test class and pass the parameter
/// straight through to the base class constructor.
/// </summary>
/// <example>
/// <code>
/// public class MyTestClass : BaseTest
/// {
/// public MyTestClass(ITestOutputHelper testOutput) : base(testOutput) { }
/// }
/// </code>
/// </example>
/// <param name="testOutput">the <see cref="ITestOutputHelper"/> that Xunit passed to the test
/// class constructor</param>
public BaseTest(ITestOutputHelper testOutput) : this()
{
testLogging = Logs.ToMultiple(TestLogging.TestOutputAdapter(testOutput), logCapture);
testLogger = testLogging.Logger("");
}