Me gustaría "combinar" las afirmaciones de colección de Afirmación fluida y las afirmaciones de propiedad, p. afirmar que dosIEnumerableas @ son iguales en pares usando la comparación de propiedad por propiedad (posiblemente "anidada") (es decir, igualdad estructural, en lenguaje funcional del lenguaje).

Ejemplo concreto

var dic = new Dictionary<int, string>() { {1, "hi"}, {2, "bye" } };
var actual = dic.ToSelectListItems(0).OrderBy(si => si.Text);

var expected = new List<SelectListItem>() {
    new SelectListItem() {Selected = false, Text="bye", Value="2"},
    new SelectListItem() {Selected = false, Text="hi", Value="1"}
};

Aquí escribí un método de extensiónToSelectListItems que convierte unaDictionary a unaIEnumerable deSelectListItems (de ASP.NET MVC). Quiero afirmar queactual yexpected son "estructuralmente" iguales, observando que el tipo de referenciaSelectListItem no anulaEquals y, por lo tanto, utiliza la igualdad de referencia de forma predeterminada.

Actualiza

Actualmente usando la siguiente solución enrollada a mano, todavía esperando algo mejor integrado en FluentAssertions:

public static void ShouldBeStructurallyEqualTo<T, U>(this IEnumerable<T> actual, IEnumerable<U> expected) {
    actual.Should().HaveCount(expected.Count());
    actual.Zip(expected).ForEach(pair => pair.Item1.ShouldHave().AllProperties().IncludingNestedObjects().EqualTo(pair.Item2));
}

(Nota:Zip aquí es mi propioIEnumerable extensión que utilizaTuple.Create como la proyección predeterminada)

Update 2

Aquí hay dos ejemplos mínimos:

public class FooBar {
    public string Foo { get; set; }
    public int Bar { get; set; }
}

public class TestClass {
    [Test]
    public void MinimalExample() {
        List<FooBar> enumerable1 = new List<FooBar>() { new FooBar() { Foo = "x", Bar = 1 }, new FooBar() { Foo = "y", Bar = 2 } };
        List<FooBar> enumerable2 = new List<FooBar>() { new FooBar() { Foo = "x", Bar = 1 }, new FooBar() { Foo = "y", Bar = 2 } };

        enumerable1.ShouldHave().SharedProperties().IncludingNestedObjects().EqualTo(enumerable2);

        //Test 'TestClass.MinimalExample' failed: System.Reflection.TargetParameterCountException : Parameter count mismatch.
        //    at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)
        //    at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
        //    at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture)
        //    at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index)
        //    at FluentAssertions.Assertions.PropertyEqualityValidator.AssertSelectedPropertiesAreEqual(Object subject, Object expected)
        //    at FluentAssertions.Assertions.PropertyEqualityValidator.Validate(UniqueObjectTracker tracker, String parentPropertyName)
        //    at FluentAssertions.Assertions.PropertyEqualityValidator.Validate()
        //    at FluentAssertions.Assertions.PropertyAssertions`1.EqualTo(Object otherObject, String reason, Object[] reasonArgs)
        //    at FluentAssertions.Assertions.PropertyAssertions`1.EqualTo(Object otherObject)
        //    MiscAssertions.cs(32,0): at TestClass.MinimalExample()
    }

    [Test]
    public void MinimalExample2() {
        IEnumerable<FooBar> enumerable1 = (new List<FooBar>() { new FooBar() { Foo = "x", Bar = 1 }, new FooBar() { Foo = "y", Bar = 2 } }).Cast<FooBar>();
        FooBar[] enumerable2 = new [] { new FooBar() { Foo = "x", Bar = 1 }, new FooBar() { Foo = "y", Bar = 2 } };

        enumerable1.ShouldHave().SharedProperties().IncludingNestedObjects().EqualTo(enumerable2);

        //Test 'TestClass.MinimalExample2' failed: System.InvalidOperationException : Please specify some properties to include in the comparison.
        //    at FluentAssertions.Assertions.PropertyEqualityValidator.Validate(UniqueObjectTracker tracker, String parentPropertyName)
        //    at FluentAssertions.Assertions.PropertyEqualityValidator.Validate()
        //    at FluentAssertions.Assertions.PropertyAssertions`1.EqualTo(Object otherObject, String reason, Object[] reasonArgs)
        //    at FluentAssertions.Assertions.PropertyAssertions`1.EqualTo(Object otherObject)
        //    MiscAssertions.cs(52,0): at TestClass.MinimalExample2()
    }
}