SparkyTestHelpers.AutoMapper 1.2.1

see also:

• SparkyTools.AutoMapper: AutoMapper syntax helpers
• SparkyTestHelpers.Mapping: Helpers for testing properties "mapped" from one type to another
• the rest of the "Sparky suite" of .NET utilities and test helpers

This package extends SparkyTestHelpers.Mapping with some additional extension methods specifically for use with AutoMapper.

MapTester<TSource, TDestination>

class SparkyTestHelpers.Mapping.MapTester<TSource, TDestination>

This class is for testing that properties were successfully "mapped" from one type to another.

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.

Extension Methods for AutoMapper

• TDestination AssertAutoMappedValues(TSource source)
  calls Mapper.Map<TSource, TDestination>(source), then AssertMappedValues()
• TDestination AssertAutoMappedRandomValues()
  uses RandomValuesHelper to create a new TSource instance, calls Mapper.Map<TSource, TDestination>(source), then AssertMappedValues()

Static Methods

• MapTester<TSource, TDestination> ForMap(

Examples

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);

AutoMapper-specific methods:

using SparkyTestHelpers.AutoMapper;

    Baz baz = CreateAndPopulateTestBax();
    Qux qux = MapTester.ForMap<Baz, Qux>.AssertAutoMappedValues(baz);

    // Create & populate Baz, map to Qux, assert success all in one statement!
    MapTester.ForMap<Baz, Qux>.AssertAutoMappedRandomValues();

As with AutoMapper, 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 matxh.

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);