dotnet-cqrs/tests/Svrnty.CQRS.Tests/CommandMetaTests.cs

using Svrnty.CQRS.Abstractions.Discovery;

namespace Svrnty.CQRS.Tests;

public class CommandMetaTests
{
    [Fact]
    public void Name_StripsCommandSuffix()
    {
        var meta = new CommandMeta(typeof(CreatePersonCommand), typeof(object));
        Assert.Equal("CreatePerson", meta.Name);
    }

    [Fact]
    public void Name_UsesCommandNameAttribute_WhenPresent()
    {
        var meta = new CommandMeta(typeof(CreateWidgetCommand), typeof(object));
        Assert.Equal("customCreate", meta.Name);
    }

    [Fact]
    public void LowerCamelCaseName_ConvertsFirstCharToLower()
    {
        var meta = new CommandMeta(typeof(CreatePersonCommand), typeof(object));
        Assert.Equal("createPerson", meta.LowerCamelCaseName);
    }

    [Fact]
    public void LowerCamelCaseName_PreservesAlreadyLowerCase()
    {
        var meta = new CommandMeta(typeof(CreateWidgetCommand), typeof(object));
        // customCreate -> already lower first char
        Assert.Equal("customCreate", meta.LowerCamelCaseName);
    }

    [Fact]
    public void CommandType_IsSetCorrectly()
    {
        var meta = new CommandMeta(typeof(CreatePersonCommand), typeof(object));
        Assert.Equal(typeof(CreatePersonCommand), meta.CommandType);
    }

    [Fact]
    public void ServiceType_IsSetCorrectly()
    {
        var serviceType = typeof(object);
        var meta = new CommandMeta(typeof(CreatePersonCommand), serviceType);
        Assert.Equal(serviceType, meta.ServiceType);
    }

    [Fact]
    public void CommandResultType_IsSetCorrectly_WithThreeArgConstructor()
    {
        var meta = new CommandMeta(typeof(CreatePersonCommand), typeof(object), typeof(CreatePersonResult));
        Assert.Equal(typeof(CreatePersonResult), meta.CommandResultType);
    }

    [Fact]
    public void CommandResultType_IsNull_WithTwoArgConstructor()
    {
        var meta = new CommandMeta(typeof(DeletePersonCommand), typeof(object));
        Assert.Null(meta.CommandResultType);
    }
}