Visual Studio 如何创建一个单元测试来访问C#中的视图

我是新来创建服务类的单元测试的。我在上下文中访问视图时遇到了一个问题。我有两个上下文，一个用于写，一个用于阅读。下面是用于阅读的上下文文件的示例。

public class readContext : DbContext
{
    private readonly IOptions<DatabaseConfig> _dbConfiguration;

    public readContext(IOptions<DatabaseConfig> dbConfiguration)
    {
        _dbConfiguration = dbConfiguration;
    }
 
    public DbSet<AppVM> AppVMs { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfiguration(new AppVMMap());

        base.OnModelCreating(modelBuilder);
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer(_dbConfiguration.Value);
    }
}

写入上下文：

public class writeContext : DbContext, IUnitOfWork
{
    private readonly IOptions<DatabaseConfig> _dbConfiguration;

    public static readonly LoggerFactory _myLoggerFactory =
    new LoggerFactory(new[] {
        new DebugLoggerProvider()
    });

    public writeContext(IOptions<DatabaseConfig> dbConfiguration)
    {
        _dbConfiguration = dbConfiguration;
    }

    public writeContext(DbContextOptions _dbConfiguration) : base(_dbConfiguration)
    {
    }

    public DbSet<Sample1> Sample1 { get; set; }
    public DbSet<Sample2> Sample2 { get; set; }
    public DbSet<Sample3> Sample3 { get; set; }       

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfiguration(new sample1Map());
        modelBuilder.ApplyConfiguration(new sample2Map());
    modelBuilder.ApplyConfiguration(new sample3Map());

        base.OnModelCreating(modelBuilder);
    }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseLoggerFactory(_myLoggerFactory);
    }

    public async Task<bool> SaveEntitiesAsync(CancellationToken cancellationToken = default(CancellationToken))
    {
        await base.SaveChangesAsync();

        return true;
    }
}

在单元测试-设置方法中，我试图创建一个内存数据库来访问上面的上下文.

var writeBuilder = new DbContextOptionsBuilder<writeContext>().UseInMemoryDatabase(databaseName: "Sample").EnableSensitiveDataLogging(true);
        _writeContext = new writeContext(writeBuilder.Options);    
      
var builder = new DbContextOptionsBuilder<readContext>().UseInMemoryDatabase(databaseName: "Sample")                                        .EnableSensitiveDataLogging();
        var context = new readContext(builder.Options);

但在此之后，我完全空白，不知道如何访问的意见。因此，可以模拟DB和Access视图。任何帮助都将不胜感激

在Entity Framework Core中，您可以使用DbContext创建自定义查询，以访问单元测试中的视图。您可以尝试以下代码，看看它是否对您有帮助。如果有任何问题，请告诉我。
在DbContext类中，创建从视图返回数据的自定义查询方法。

public IQueryable<AppVM> GetAppVMs()
{
    return AppVMs;
}

在单元测试方法中，使用自定义查询方法从视图访问数据。

[TestMethod]
public void Test_GetAppVMs()
{
    // Arrange: Create an instance of the DbContext
    var builder = new DbContextOptionsBuilder<readContext>()
        .UseInMemoryDatabase(databaseName: "Sample")
        .EnableSensitiveDataLogging();

    var context = new readContext(builder.Options);

    // Act: Call the custom query method to get data from the view
    var appVMs = context.GetAppVMs().ToList();

    // Assert: Perform your assertions on the retrieved data
    Assert.AreEqual(10, appVMs.Count);
}

本示例假定AppVM是表示视图结构的类或模型。将其替换为适当的类名。

Visual Studio 如何创建一个单元测试来访问C#中的视图

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