public async Task MessageBoardService_SendAsync_Throws_Exception_When_SendMessageRequest_Is_Null()
{
// Arrange
var options = new DbContextOptionsBuilder <MessageBoardDbContext>()
.UseInMemoryDatabase("MessageBoardDB")
.Options;
using (var dbContext = new MessageBoardDbContext(options))
{
// Clear existing messages
dbContext.Messages.RemoveRange(dbContext.Messages);
await dbContext.SaveChangesAsync();
// Initialize new messages
dbContext.Messages.Add(new MessageDb {
User = "******", Content = "Hello Tom.", Created = DateTime.Now.AddMinutes(5)
});
dbContext.Messages.Add(new MessageDb {
User = "******", Content = "Hi, Rick.", Created = DateTime.Now.AddMinutes(5)
});
await dbContext.SaveChangesAsync();
};
SendMessageRequest request = null;
var mapper = new MessageMapper();
using (var dbContext = new MessageBoardDbContext(options))
{
var service = new MessageBoardService(mapper, dbContext);
// Act and Assert
await Assert.ThrowsAsync <ArgumentNullException>(() => service.SendAsync(request));
};
}
public async Task MessageBoardService_SendAsync_Returns_ThreeMessages()
{
// Arrange
var options = new DbContextOptionsBuilder <MessageBoardDbContext>()
.UseInMemoryDatabase("MessageBoardDB")
.Options;
using (var dbContext = new MessageBoardDbContext(options))
{
// Clear existing messages
dbContext.Messages.RemoveRange(dbContext.Messages);
await dbContext.SaveChangesAsync();
// Initialize new messages
dbContext.Messages.Add(new MessageDb {
User = "******", Content = "Hello Tom.", Created = DateTime.Now.AddMinutes(5)
});
dbContext.Messages.Add(new MessageDb {
User = "******", Content = "Hi, Rick.", Created = DateTime.Now.AddMinutes(5)
});
await dbContext.SaveChangesAsync();
};
var request = new SendMessageRequest
{
User = "******",
Message = "It works."
};
var mapper = new MessageMapper();
using (var dbContext = new MessageBoardDbContext(options))
{
var service = new MessageBoardService(mapper, dbContext);
// Act
await service.SendAsync(request);
var response = await service.GetAsync();
// Assert
Assert.Equal(3, response.Messages.Count);
};
}
public async Task SendAsync(SendMessageRequest request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
var messageDb = _mapper.ToMessageDbModel(request);
messageDb.Created = DateTime.UtcNow;
_dbContext.Add(messageDb);
await _dbContext.SaveChangesAsync();
}
