/// <summary>
/// Asserts that the specification is met.
/// </summary>
/// <param name="builder">The specification builder.</param>
/// <param name="runner"></param>
/// <param name="comparer">The event comparer.</param>
/// <param name="logger">A logger.</param>
public static void Assert(
this IEventCentricTestSpecificationBuilder builder,
IEventCentricTestSpecificationRunner runner,
IFactComparer comparer,
ILogger logger)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (runner == null)
{
throw new ArgumentNullException(nameof(runner));
}
if (comparer == null)
{
throw new ArgumentNullException(nameof(comparer));
}
if (logger == null)
{
throw new ArgumentNullException(nameof(logger));
}
var specification = builder.Build();
logger.LogTrace($"Given: \r\n{specification.Givens.ToLogStringVerbose()}");
logger.LogTrace($"When: \r\n{specification.When.ToLogString()}");
logger.LogTrace($"Then: \r\n{specification.Thens.ToLogStringVerbose()}");
var result = runner.Run(specification);
if (result.Failed)
{
if (result.ButException.HasValue)
{
logger.LogTrace($"Actual exception: \r\n{result.ButException.Value.ToLogString(includeStackTrace: true)}");
using (var writer = new StringWriter())
{
writer.WriteLine(" Expected: {0} event(s),", result.Specification.Thens.Length);
writer.WriteLine(" But was: {0}", result.ButException.Value);
#if NUNIT
throw new NUnit.Framework.AssertionException(writer.ToString());
#elif XUNIT
throw new Xunit.Sdk.XunitException(writer.ToString());
#endif
}
}
if (result.ButEvents.HasValue)
{
logger.LogTrace($"Actual events: \r\n{result.ButEvents.Value.ToLogStringVerbose()}");
if (result.ButEvents.Value.Length != result.Specification.Thens.Length)
{
using (var writer = new StringWriter())
{
writer.WriteLine(" Expected: {0} event(s) ({1}),",
result.Specification.Thens.Length,
result.Specification.Thens.ToLogStringShort());
writer.WriteLine(" But was: {0} event(s) ({1})",
result.ButEvents.Value.Length,
result.ButEvents.Value.ToLogStringShort());
#if NUNIT
throw new NUnit.Framework.AssertionException(writer.ToString());
#elif XUNIT
throw new Xunit.Sdk.XunitException(writer.ToString());
#endif
}
}
using (var writer = new StringWriter())
{
writer.WriteLine(" Expected: {0} event(s) ({1}),",
result.Specification.Thens.Length,
result.Specification.Thens.ToLogStringShort());
writer.WriteLine(" But found the following differences:");
foreach (var difference in result.Specification.Thens
.Zip(result.ButEvents.Value, (expected, actual) => new Tuple <Fact, Fact>(expected, actual))
.SelectMany(_ => comparer.Compare(_.Item1, _.Item2)))
{
writer.WriteLine(" {0}", difference.Message);
}
#if NUNIT
throw new NUnit.Framework.AssertionException(writer.ToString());
#elif XUNIT
throw new Xunit.Sdk.XunitException(writer.ToString());
#endif
}
}
logger.LogTrace("Actual events: None");
}
logger.LogTrace(result.ButEvents.HasValue
? $"Actual events: \r\n{result.ButEvents.Value.ToLogStringVerbose()}"
: "Actual events: None");
}
/// <summary>
/// Asserts that the specification is met.
/// </summary>
/// <param name="builder">The specification builder.</param>
/// <param name="comparer">The event comparer.</param>
public static async Task Assert(this IEventCentricTestSpecificationBuilder builder,
IFactComparer comparer, object handler, IFactRecorder factRecorder)
{
if (builder == null)
{
throw new ArgumentNullException(nameof(builder));
}
if (comparer == null)
{
throw new ArgumentNullException(nameof(comparer));
}
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
if (factRecorder == null)
{
throw new ArgumentNullException(nameof(factRecorder));
}
var specification = builder.Build();
var runner = new EventCentricTestSpecificationRunner(comparer, handler, factRecorder);
var result = await runner.Run(specification);
if (!result.Failed)
{
return;
}
if (result.ButException.HasValue)
{
await using var writer = new StringWriter();
writer.WriteLine(" Expected: {0} event(s),", result.Specification.Thens.Length);
writer.WriteLine(" But was: {0}", result.ButException.Value);
throw new Xunit.Sdk.XunitException(writer.ToString());
}
if (!result.ButEvents.HasValue)
{
return;
}
if (result.ButEvents.Value.Length != result.Specification.Thens.Length)
{
await using var writer = new StringWriter();
writer.WriteLine(" Expected: {0} event(s) ({1}),",
result.Specification.Thens.Length,
string.Join(",", result.Specification.Thens.Select(_ => _.Event.GetType().Name).ToArray()));
writer.WriteLine(" But was: {0} event(s) ({1})",
result.ButEvents.Value.Length,
string.Join(",", result.ButEvents.Value.Select(_ => _.Event.GetType().Name).ToArray()));
throw new Xunit.Sdk.XunitException(writer.ToString());
}
await using (var writer = new StringWriter()) {
writer.WriteLine(" Expected: {0} event(s) ({1}),",
result.Specification.Thens.Length,
string.Join(",", result.Specification.Thens.Select(_ => _.Event.GetType().Name).ToArray()));
writer.WriteLine(" But found the following differences:");
foreach (var difference in
result.Specification.Thens.Zip(result.ButEvents.Value,
(expected, actual) => new Tuple <Fact, Fact>(expected, actual))
.SelectMany(_ => comparer.Compare(_.Item1, _.Item2)))
{
writer.WriteLine(" {0}", difference.Message);
}
throw new Xunit.Sdk.XunitException(writer.ToString());
}
}
public IEventGeneratingScenarioGivenStateBuilder Given(IEventCentricTestSpecificationBuilder givenScenario)
{
var specification = givenScenario.Build();
return(new AutoAutoFixtureTestBuilder(this.Given(specification.Givens).Given(SetProvenance(specification.Thens)), _fixture));
}