JSON.parse 位置 0 处的 JSON 中的意外标记 u

Question

I am trying to write jest test case for submit function which has JSON.parse involed in it. Below is the code and test case for it.

handleFormSubmit = (e) => {
        e.preventDefault();
        let requestData = JSON.parse(JSON.stringify(this.props.tempAddRequest));
            if (e.target[1].value.length === 0) {
                this.setState({ rrNumberFeedback: true, rrNumberErr: FIELD_ERROR });
            }
}

 it("should check if rr is null on clicking submit button in modal", () => {
        const instance = wrapper.instance();
        const e = {
            target: [{ name: "branchNumber", value: "" }, { name: "rrNumber", value: "" }, { name: "crdNumber", value: "1234" }],
            preventDefault: () => { }
        }
        instance.handleFormSubmit(e);
        expect(wrapper.state('rrNumberErr')).toEqual("E");
        expect(wrapper.state('rrNumberFeedback')).toEqual(true);
    });

Answer 1

If the handleFormSubmit involves JSON.parse() you need to send the stringified JSON in the value of event

try changing event as

const e = {
        target: JSON.stringify([{ name: "branchNumber", value: "" }, { name: "rrNumber", value: "" }, { name: "crdNumber", value: "1234" }]),
        preventDefault: () => { }
    }