/// <summary>
/// Creates a new specimen based on a requested range.
/// </summary>
/// <param name="request">The request that describes what to create.</param>
/// <param name="context">A container that can be used to create other specimens.</param>
/// <returns>
/// A specimen created from a <see cref="RangedNumberRequest"/> encapsulating the operand
/// type, the minimum and the maximum of the requested number, if possible; otherwise,
/// a <see cref="NoSpecimen"/> instance.
/// </returns>
public object Create(object request, ISpecimenContext context)
{
if (request == null)
{
return(new NoSpecimen());
}
if (context == null)
{
throw new ArgumentNullException("context");
}
var customAttributeProvider = request as ICustomAttributeProvider;
if (customAttributeProvider == null)
{
#pragma warning disable 618
return(new NoSpecimen(request));
#pragma warning restore 618
}
var rangeAttribute = customAttributeProvider.GetCustomAttributes(typeof(RangeAttribute), inherit: true).Cast <RangeAttribute>().SingleOrDefault();
if (rangeAttribute == null)
{
#pragma warning disable 618
return(new NoSpecimen(request));
#pragma warning restore 618
}
return(context.Resolve(RangeAttributeRelay.Create(rangeAttribute, request)));
}
public void SutIsSpecimenBuilder()
{
// Fixture setup
// Exercise system
var sut = new RangeAttributeRelay();
// Verify outcome
Assert.IsAssignableFrom<ISpecimenBuilder>(sut);
// Teardown
}
public void CreateWithNullContextThrows()
{
// Fixture setup
var sut = new RangeAttributeRelay();
var dummyRequest = new object();
// Exercise system and verify outcome
Assert.Throws<ArgumentNullException>(() =>
sut.Create(dummyRequest, null));
// Teardown
}
public void CreateWithNullRequestReturnsCorrectResult()
{
// Fixture setup
var sut = new RangeAttributeRelay();
// Exercise system
var dummyContext = new DelegatingSpecimenContext();
var result = sut.Create(null, dummyContext);
// Verify outcome
Assert.Equal(new NoSpecimen(), result);
// Teardown
}
public void CreateWithNonRangeAttributeRequestReturnsCorrectResult(object request)
{
// Fixture setup
var sut = new RangeAttributeRelay();
// Exercise system
var dummyContext = new DelegatingSpecimenContext();
var result = sut.Create(request, dummyContext);
// Verify outcome
var expectedResult = new NoSpecimen(request);
Assert.Equal(expectedResult, result);
// Teardown
}
public void CreateWithAnonymousRequestReturnsCorrectResult()
{
// Fixture setup
var sut = new RangeAttributeRelay();
var dummyRequest = new object();
// Exercise system
var dummyContainer = new DelegatingSpecimenContext();
var result = sut.Create(dummyRequest, dummyContainer);
// Verify outcome
#pragma warning disable 618
var expectedResult = new NoSpecimen(dummyRequest);
#pragma warning restore 618
Assert.Equal(expectedResult, result);
// Teardown
}
public void CreateWithRangeAttributeRequestReturnsCorrectResult(Type type, object minimum, object maximum)
{
// Fixture setup
var rangeAttribute = new RangeAttribute(type, minimum.ToString(), maximum.ToString());
var providedAttribute = new ProvidedAttribute(rangeAttribute, true);
ICustomAttributeProvider request = new FakeCustomAttributeProvider(providedAttribute);
Type conversionType = rangeAttribute.OperandType;
var expectedRequest = new RangedNumberRequest(
conversionType,
Convert.ChangeType(rangeAttribute.Minimum, conversionType, CultureInfo.CurrentCulture),
Convert.ChangeType(rangeAttribute.Maximum, conversionType, CultureInfo.CurrentCulture)
);
var expectedResult = new object();
var context = new DelegatingSpecimenContext
{
#pragma warning disable 618
OnResolve = r => expectedRequest.Equals(r) ? expectedResult : new NoSpecimen(r)
#pragma warning restore 618
};
var sut = new RangeAttributeRelay();
// Exercise system
var result = sut.Create(request, context);
// Verify outcome
Assert.Equal(expectedResult, result);
// Teardown
}
public void CreateWithFieldDecoratedWithRangeAttributeReturnsCorrectResult(
string name,
object attributeMinimum,
object attributeMaximum)
{
// Fixture setup
var request = typeof(RangeValidatedType).GetField(name);
Type target = Nullable.GetUnderlyingType(request.FieldType)
?? request.FieldType;
var expectedRequest = new RangedNumberRequest(
target,
Convert.ChangeType(RangeValidatedType.Minimum, target, CultureInfo.CurrentCulture),
Convert.ChangeType(RangeValidatedType.Maximum, target, CultureInfo.CurrentCulture)
);
var expectedResult = new object();
var context = new DelegatingSpecimenContext
{
#pragma warning disable 618
OnResolve = r => expectedRequest.Equals(r) ? expectedResult : new NoSpecimen(r)
#pragma warning restore 618
};
var sut = new RangeAttributeRelay();
// Exercise system
var result = sut.Create(request, context);
// Verify outcome
Assert.Equal(expectedResult, result);
// Teardown
}
public void CreateWithPropertyDecoratedWithRangeAttributeReturnsCorrectResult(
Type attributeType,
object attributeMinimum,
object attributeMaximum)
{
// Fixture setup
var request = typeof(RangeValidatedType).GetProperty("Property");
Type target = request.PropertyType;
var expectedRequest = new RangedNumberRequest(
target,
Convert.ChangeType(RangeValidatedType.Minimum, target, CultureInfo.CurrentCulture),
Convert.ChangeType(RangeValidatedType.Maximum, target, CultureInfo.CurrentCulture)
);
var expectedResult = new object();
var context = new DelegatingSpecimenContext
{
OnResolve = r => expectedRequest.Equals(r) ? expectedResult : new NoSpecimen(r)
};
var sut = new RangeAttributeRelay();
// Exercise system
var result = sut.Create(request, context);
// Verify outcome
Assert.Equal(expectedResult, result);
// Teardown
}
