javascript - Jest expect.objectContaining() 在 expect.toHaveBennCalled() 中失败

Question

我正在尝试编写一个测试来验证使用 aws-sdk 写入 DynamoDB 的代码。尽管官方文档(https://jestjs.io/docs/en/expect#expectobjectcontainingobject)中提出了一个非常相似的用例，但我的断言失败了。任何帮助表示赞赏。

这是我的测试:

test("givenCprRepositoryServiceTestSuite_whenSaveCprRecord_thenMetaExpiresAtAppended", async () => {
        await cprRepositoryService.saveCprRecord({cprNumber: existingCpr, firstName: "Jens", lastName: "Jensen"})

        expect(aws.DynamoDB.DocumentClient.prototype.put).toHaveBeenCalledWith(
            expect.objectContaining({
                Item: {
                    metaExpiresAt: expect.any(Number)
                }
            }))
    })

并且返回的错误是:

错误:
expect(jest.fn()).toHaveBeenCalledWith(...expected)
预期的对象包含:
{"Item": {"metaExpiresAt": Any<Number>}}
已收到:
{"Item": {"cprNumber": "1234567890", "firstName": "Jens", "lastName": "Jensen", "metaExpiresAt": 1570792526}, "TableName": "CountryLayer_Cpr"}

Answer 1

expect.objectContaining(object)方法无法处理嵌套对象。要解决此问题，我建议对您的代码进行以下修改。

test("givenCprRepositoryServiceTestSuite_whenSaveCprRecord_thenMetaExpiresAtAppended", async () => {
        await cprRepositoryService.saveCprRecord({cprNumber: existingCpr, firstName: "Jens", lastName: "Jensen"})

        expect(aws.DynamoDB.DocumentClient.prototype.put).toHaveBeenCalledWith(
            expect.objectContaining({
                Item: expect.objectContaining({
                    metaExpiresAt: expect.any(Number)
                })
            }))
    })