public void SutIsSpecimenBuilder()
{
// Fixture setup
var seed = DateTime.Now;
// Exercise system
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Verify outcome
Assert.IsAssignableFrom<ISpecimenBuilder>(sut);
// Teardown
}
public void CreateWithNullRequestReturnsNoSpecimen()
{
// Fixture setup
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = sut.Create(null, dummyContainer);
// Verify outcome
Assert.Equal(new NoSpecimen(), result);
// Teardown
}
public void CreateWithDateTimeRequestReturnsDateTimeValue()
{
// Fixture setup
var request = typeof(DateTime);
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = sut.Create(request, dummyContainer);
// Verify outcome
Assert.IsAssignableFrom<DateTime>(result);
// Teardown
}
public void CreateWithNonTypeRequestReturnsNoSpecimen(object request)
{
// Fixture setup
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = sut.Create(request, dummyContainer);
// Verify outcome
var expectedResult = new NoSpecimen(request);
Assert.Equal(expectedResult, result);
// Teardown
}
public void CreateWithDateTimeRequestReturnsDifferentDay()
{
// Fixture setup
var request = typeof(DateTime);
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = (DateTime)sut.Create(request, dummyContainer);
// Verify outcome
Assert.NotEqual(DateTime.Today, result.Date);
// Teardown
}
public void CreateWithDateTimeRequestAndSeedValueReturnsSeedValuePlusOneDay()
{
// Fixture setup
var request = typeof(DateTime);
var seed = DateTime.Now.AddDays(3);
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = (DateTime)sut.Create(request, dummyContainer);
// Verify outcome
Assert.Equal(seed.AddDays(1), result);
// Teardown
}
public void CreateWithDateTimeRequestsTwiceWithinMillisecondsReturnsDatesExactlyOneDayApart()
{
// Fixture setup
var nowResolution = TimeSpan.FromMilliseconds(10); // see http://msdn.microsoft.com/en-us/library/system.datetime.now.aspx
var request = typeof(DateTime);
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var firstResult = (DateTime)sut.Create(request, dummyContainer);
Thread.Sleep(nowResolution + nowResolution);
var secondResult = (DateTime)sut.Create(request, dummyContainer);
// Verify outcome
Assert.Equal(firstResult.AddDays(1), secondResult);
// Teardown
}
public void CreateWithMultipleDateTimeRequestsReturnsSequenceOfDates()
{
// Fixture setup
var sequence = Enumerable.Range(1, 7);
var expectedDates = sequence.Select(i => DateTime.Today.AddDays(i));
var request = typeof(DateTime);
var seed = DateTime.Now;
var sut = new StrictlyMonotonicallyIncreasingDateTimeGenerator(seed);
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var results = sequence.Select(i => (DateTime)sut.Create(request, dummyContainer)).ToArray();
// Verify outcome
Assert.True(expectedDates.SequenceEqual(results.Select(i => i.Date)));
// Teardown
}