NSubstitute 與 DbConnection

Question

我需要將 DbConnection 傳遞給我的 class。 為此，我正在使用 NSubstitute。 但是當我運行測試時，會出現以下錯誤：“System.NullReferenceException：Object 引用未設置為 object 的實例。Dapper”

我的測試

public class SceneApplicationServiceTest
{
    private readonly DbConnection _connection = Substitute.For<DbConnection>();
    ISceneApplicationService _sceneApplicationService;

    public SceneApplicationServiceTest()
    {
        _sceneApplicationService = new SceneApplicationService(_connection);
    }

    [Fact]
    public async Task ShouldBePossibleSuccessfullyGetByProgramScript()
    {
        const long programId = 1;
        const string scriptId = "2";            

        await _sceneApplicationService.GetByProgramScript(programId, scriptId);

        await _sceneApplicationService.Received(1).GetByProgramScript(programId, scriptId);
    }
}

我的方法

 public class SceneApplicationService : ISceneApplicationService
{
    private readonly DbConnection _connection;
    
    public SceneApplicationService(DbConnection connection)
    {
        _connection = connection;
    }

    public async Task<IEnumerable<LegacySceneResponse>> GetByProgramScript(long programId, string scriptId)
    {
        object parameters = new 
        {
            CodigoPrograma = programId,
            CodigoRoteiro = scriptId
        };

        if (!ObjectValidation.IsInvalidAnyNullOrEmpty(parameters)) ;

        return await _connection.QueryAsync<LegacySceneResponse>(GetScenesByScriptAndProgram.Query, parameters);
    }}

當測試嘗試運行“QueryAsync”時發生錯誤

有任何想法嗎？

Answer 1

看這里，它是小巧玲瓏擴展的起訂量：

https://github.com/UnoSD/Moq.Dapper

QueryAsync 是來自 Dapper nuget 的擴展方法。