SparkyTestHelpers.Mapping 1.2.1

see also:

• the rest of the "Sparky suite" of .NET utilities and test helpers

MapTester<TSource, TDestination>

class SparkyTestHelpers.Mapping.MapTester<TSource, TDestination>

This class is for testing that properties were successfully "mapped" from one type to another, either via AutoMapper or another automatic mapping framework, or by hand-written "destination.X = source.X;" code.

See SparkyTestHelpers.AutoMapper for additional extension methods specifically for working with AutoMapper.

Methods

• MapTester<TSource, TDestination> WithLogging(Action<String> action)
  (optional) "Callback" action to log property values when asserting. If called without an action, defaults to Console.WriteLine.
• MapTester<TSource, TDestination> IgnoringMember(Expression<Func<TDestination, Object>> destExpression)
• MapMemberTester<TSource, TDestination> WhereMember(Expression<Func<TDestination, Object>> destExpression)
• void AssertMappedValues(TSource source, TDestination dest)
  throws exception if any source/destination map validation specifications fail, or if any destination properties aren’t either tested or IgnoreMember’d.

Static Methods

• MapTester<TSource, TDestination> ForMap()

Example

using SparkyTestHelpers.Mapping;

    Foo foo = CreateAndPopulateTestFoo();
    Bar bar = Mapper.Map<Foo, Bar>(foo); 

    MapTester.ForMap<Foo, Bar>()
        .WithLogging()
        .IgnoringMember(dest => dest.DestOnlyProperty)
        .WhereMember(dest => dest.StatusCode).ShouldEqual(src => src.Status)
        .WhereMember(dest => dest.IsValid).ShouldEqualValue(true)
        .WhereMember(dest => dest.Percent).IsTestedBy((src, dest) => 
            Assert.AreEqual(src.Rate / 100, dest.Percent))
        .AssertMappedValues(foo, bar);

You don't have to configure anything for properties with the same name/type in the source and destination instances. AssertMappedValues() considers those successful if the source/destination values match.

Use IgnoringMember for destination properties that are not mapped, or which you need to test in another way.

Use WhereMember to "dot" to the ShouldEqual, ShouldEqualValue and IsTestedBy functions.

MapMemberTester<TSource, TDestination>

class SparkyTestHelpers.Mapping.MapMemberTester<TSource, TDestination>

This class is for testing that a property was successfully "mapped" from one type to another.

Methods

• MapTester<TSource, TDestination> ShouldEqual(Expression<Func<TSource, Object>> sourceExpression)
  use to verify destination property mapped from differently named source property(s)
• MapTester<TSource, TDestination> ShouldEqualValue(Object value)
  use to verify destination property using a constant or some other value not derived from the source
• MapTester<TSource, TDestination> IsTestedBy(Action<TSource, TDestination> customTest)
  use for custom complex validation that doesn't fit one of the other verification methods

RandomValuesHelper

class SparkyTestHelpers.Mapping.RandomValuesHelper

Test helper for updating class instance properties with random values (so you can fill a "source" instance without writing a lot of code).

Methods

• T CreateInstanceWithRandomValues()
• T UpdatePropertiesWithRandomValues(T instance)

Example

using SparkyTestHelpers.Mapping;

    Foo foo = new RandomValuesHelper().CreateInstanceWithRandomValues<Foo>();

    var bar = new Bar();
    new RandomValuesHelper().UpdatePropertiesWithRandomValues(bar);