Question

我正在尝试编写一个测试，以测试使用aws-sdk写入DynamoDB的代码。尽管官方文档（https://jestjs.io/docs/en/expect#expectobjectcontainingobject）中提供了非常相似的用例，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)
                }
            }))
    })

返回的错误是：

错误： expect(jest.fn()).toHaveBeenCalledWith(...expected)

预期的ObjectContaining：

{"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，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)
                })
            }))
    })

玩笑的Expect.objectContaining（）在Expect.toHaveBennCalled（）中失败

1 个答案: