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using System;
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using System.Reflection;
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using System.Threading;
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using Implab.Parallels;
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using Implab.Components;
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using Implab.Test.Mock;
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#if MONO
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using NUnit.Framework;
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using TestClassAttribute = NUnit.Framework.TestFixtureAttribute;
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using TestMethodAttribute = NUnit.Framework.TestAttribute;
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using AssertFailedException = NUnit.Framework.AssertionException;
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#else
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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#endif
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namespace Implab.Test {
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[TestClass]
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public class PollingComponentTests {
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static void ShouldThrow(Action action) {
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try {
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action();
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Assert.Fail();
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} catch (AssertFailedException) {
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throw;
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} catch {
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}
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}
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[TestMethod]
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public void NormalFlowTest() {
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, false);
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Assert.AreEqual(ExecutionState.Created, comp.State);
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comp.Initialize();
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Assert.AreEqual(ExecutionState.Ready, comp.State);
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comp.Start().Join(1000);
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Assert.AreEqual(ExecutionState.Running, comp.State);
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comp.Stop().Join(1000);
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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[TestMethod]
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public void ShouldStartTicks() {
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var signal = new Signal();
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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comp.MockTick = ct => {
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signal.Set();
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return Promise.Success;
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};
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comp.Start().Join(1000);
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signal.Wait(1000);
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comp.Stop().Join(1000);
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}
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[TestMethod]
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public void StopShouldWaitForTickToComplete() {
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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var signal = new Signal();
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var promise = new Promise();
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// timer should tick once
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comp.MockTick = ct => {
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signal.Set();
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return promise;
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};
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// start timer
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comp.Start().Join(1000);
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signal.Wait(); // wait for tick
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// try to stop component
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var stopping = comp.Stop();
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Assert.AreEqual(ExecutionState.Stopping, comp.State);
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ShouldThrow(() => stopping.Join(100));
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Assert.AreEqual(ExecutionState.Stopping, comp.State);
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// complete operation
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promise.Resolve();
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// the component should stop normally
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stopping.Join(1000);
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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[TestMethod]
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public void ShouldRecoverAfterTickError() {
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var ticks = 0;
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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var signal = new Signal(); // will signal when timer fires 10 times
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comp.MockTick = ct => {
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ticks++;
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if (ticks == 10)
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signal.Set();
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// each time handler dies
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throw new Exception("tainted handler");
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};
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comp.Start();
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signal.Wait(1000);
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comp.Stop().Join(1000);
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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[TestMethod]
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public void StopCancelHandlerOnStop() {
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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var started = new Signal();
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bool cancelled = false;
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// timer should tick once
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comp.MockTick = ct => {
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started.Set();
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while(!ct.IsCancellationRequested) {
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Thread.Sleep(1);
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}
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cancelled = true;
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throw new OperationCanceledException();
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};
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// start timer
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comp.Start().Join(1000);
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started.Wait(); // wait for tick
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// try to stop component
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comp.Stop().Join(1000);
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Assert.AreEqual(true, cancelled);
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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[TestMethod]
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public void FailTickOnStopShouldBeIgnored() {
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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var started = new Signal();
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var finish = new Signal();
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// timer should tick once
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comp.MockTick = ct => {
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started.Set();
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finish.Wait();
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// component is in stopping state here
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throw new Exception("Die, die, die!!!");
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};
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comp.MockOnError = comp.CallComponentFail;
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// start timer
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comp.Start().Join(1000);
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started.Wait(); // wait for tick
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// try to stop component
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var stopping = comp.Stop();
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// the component is in stopping state but it is waiting for the tick handler to complete
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finish.Set(); // signal the tick handler to finish
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// tick handler should stop rather soon
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stopping.Join(1000);
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// validate the component is disposed
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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[TestMethod]
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public void FailTickShouldFailComponent() {
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var comp = new MockPollingComponent(TimeSpan.FromMilliseconds(1), null, true);
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var started = new Signal();
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var finish = new Signal();
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// timer should tick once
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comp.MockTick = ct => {
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started.Set();
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throw new Exception("Die, die, die!!!");
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};
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comp.MockOnError = err => {
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comp.CallComponentFail(err);
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finish.Set();
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};
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// start timer
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comp.Start().Join(1000);
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started.Wait(); // wait for tick
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finish.Wait();
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// try to stop component
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ShouldThrow(() => comp.Stop());
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Assert.AreEqual(ExecutionState.Failed, comp.State);
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Assert.IsNotNull(comp.LastError);
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Assert.AreEqual("Die, die, die!!!", comp.LastError.Message);
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comp.Dispose();
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Assert.AreEqual(ExecutionState.Disposed, comp.State);
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}
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}
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}
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