src/Services/Ordering/Ordering.UnitTests/Domain/SeedWork/ValueObjectTests.cs

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namespace Ordering.UnitTests.Domain.SeedWork;

public class ValueObjectTests
{
    public ValueObjectTests()
    { }

    [Theory]
    [MemberData(nameof(EqualValueObjects))]
    public void Equals_EqualValueObjects_ReturnsTrue(ValueObject instanceA, ValueObject instanceB, string reason)
    {
        // Act
        var result = EqualityComparer<ValueObject>.Default.Equals(instanceA, instanceB);

        // Assert
        Assert.True(result, reason);
    }

    [Theory]
    [MemberData(nameof(NonEqualValueObjects))]
    public void Equals_NonEqualValueObjects_ReturnsFalse(ValueObject instanceA, ValueObject instanceB, string reason)
    {
        // Act
        var result = EqualityComparer<ValueObject>.Default.Equals(instanceA, instanceB);

        // Assert
        Assert.False(result, reason);
    }

    private static readonly ValueObject APrettyValueObject = new ValueObjectA(1, "2", Guid.Parse("97ea43f0-6fef-4fb7-8c67-9114a7ff6ec0"), new ComplexObject(2, "3"));

    public static readonly TheoryData<ValueObject, ValueObject, string> EqualValueObjects = new TheoryData<ValueObject, ValueObject, string>
    {
        {
            null,
            null,
            "they should be equal because they are both null"
        },
        {
            APrettyValueObject,
            APrettyValueObject,
            "they should be equal because they are the same object"
        },
        {
            new ValueObjectA(1, "2", Guid.Parse("97ea43f0-6fef-4fb7-8c67-9114a7ff6ec0"), new ComplexObject(2, "3")),
            new ValueObjectA(1, "2", Guid.Parse("97ea43f0-6fef-4fb7-8c67-9114a7ff6ec0"), new ComplexObject(2, "3")),
            "they should be equal because they have equal members"
        },
        {
            new ValueObjectA(1, "2", Guid.Parse("97ea43f0-6fef-4fb7-8c67-9114a7ff6ec0"), new ComplexObject(2, "3"), notAnEqualityComponent: "xpto"),
            new ValueObjectA(1, "2", Guid.Parse("97ea43f0-6fef-4fb7-8c67-9114a7ff6ec0"), new ComplexObject(2, "3"), notAnEqualityComponent: "xpto2"),
            "they should be equal because all equality components are equal, even though an additional member was set"
        },
        {
            new ValueObjectB(1, "2",  1, 2, 3 ),
            new ValueObjectB(1, "2",  1, 2, 3 ),
            "they should be equal because all equality components are equal, including the 'C' list"
        }
    };