我不明白为什么这个数据库测试失败。我知道我没有在 created_at 和 updated_at 列上断言，但是三列（id、user_id、thing_id）应该足够了，我确信我之前只测试了一些列，并且它工作了！
我错过了什么？
Failed asserting that a row in the table [thing_history] matches the attributes [
{
"id": 1,
"user_id": 1,
"thing_id": 1
},
{
"id": 2,
"user_id": 1,
"thing_id": 2
},
{
"id": 3,
"user_id": 1,
"thing_id": 3
}
].
Found: [
{
"id": "1",
"user_id": "1",
"thing_id": "1",
"created_at": "2019-02-01 21:18:17",
"updated_at": "2019-02-01 21:18:17"
},
{
"id": "2",
"user_id": "1",
"thing_id": "2",
"created_at": "2019-02-01 21:18:17",
"updated_at": "2019-02-01 21:18:17"
},
{
"id": "3",
"user_id": "1",
"thing_id": …