我有两个简单的构成部分。 我是用 j子为他们撰写考试。 在我点击货币体系时,我想测试一下,有关阵列应当添加到选定国家。 您可以看到,我通过<条码>,作为货币的推进剂。 因此,我也想 mo弄它。

货币轨道。

import { useEffect, useState } from "react";
import { currencies } from "../constants";
import { Currency } from "../types";
import CurrencyItem from "./CurrencyItem";

const CurrencySelector = () => {
  const initialSelected = () => {
    const storedCurrencies = sessionStorage.getItem("currencies");
    return storedCurrencies ? JSON.parse(storedCurrencies) : [];
  };

  const [selected, setSelected] = useState<Currency[]>(initialSelected);

  const handleCurrencyToggle = (currency: Currency) => {
    const isSelected = selected.some(
      (selectedCurrency) => selectedCurrency.name === currency.name
    );

    if (isSelected) {
      setSelected((prevSelected) =>
        prevSelected.filter(
          (selectedCurrency) => selectedCurrency.name !== currency.name
        )
      );
    } else {
      setSelected((prevSelected) => [...prevSelected, currency]);
    }
  };

  useEffect(() => {
    sessionStorage.setItem("currencies", JSON.stringify(selected));
  }, [selected]);

  return (
    <div className="currency-selector">
      <div className="selected-currencies currency-items">
        {selected.length > 0 ? (
          selected.map((currency: Currency, index: number) => (
            <div
              data-testid="selected-currency"
              key={index}
              className="selected-currency currency"
            >
              <span>{currency.name}</span>
              <button
                className="unselect-currency"
                onClick={() => handleCurrencyToggle(currency)}
              >
                x
              </button>
            </div>
          ))
        ) : (
          <div data-testid="no-selected-currencies" className="no-currencies">
            No selected currencies
          </div>
        )}
      </div>
      <div className="currency-items">
        {currencies.map((currency: Currency, index: number) => (
          <CurrencyItem
            data-testid={`currency-item-${index}`}
            key={index}
            currency={currency}
            onClick={() => handleCurrencyToggle(currency)}
            isSelected={selected.some(
              (selectedCurrency) => selectedCurrency.name === currency.name
            )}
          />
        ))}
      </div>
    </div>
  );
};

export default CurrencySelector;

货币估算值。

import { Currency } from "../types";

const CurrencyItem = ({
  currency,
  onClick,
  isSelected,
}: {
  currency: Currency;
  onClick: () => void;
  isSelected: boolean;
}) => {
  const handleCheckboxChange = () => {
    onClick();
  };

  return (
    <div data-testid="currency-item" onClick={onClick} className="currency">
      <label>
        <input onChange={handleCheckboxChange} checked={isSelected} type="checkbox" />
        <span className="checkbox-container"></span>
      </label>
      <span>{currency.name}</span>
    </div>
  );
};

export default CurrencyItem;

货币阵列:

import { Currency } from "../types";

export const currencies: Currency[] = [
  {
    name: "EUR",
  },
  {
    name: "PLN",
  },
  {
    name: "GEL",
  },
  {
    name: "DKK",
  },
  {
    name: "CZK",
  },
  {
    name: "GBP",
  },
  {
    name: "SEK",
  },
  {
    name: "USD",
  },
  {
    name: "RUB",
  },
];

我的考验:

  it("adds currency to select list", () => {
    const handleCurrencyToggle = jest.fn()
    const { getByTestId: getByTestId2 } = render(
        <CurrencySelector />
      );
    const { getByTestId } = render(
      <CurrencyItem
        key={1}
        currency={currencies[0]}
        onClick={() => () => {
          handleCurrencyToggle();
        }}
        isSelected={true}
      />
    );
    
    const currencyItem = getByTestId("currency-item");
    fireEvent.click(currencyItem);

    const selectItem = getByTestId2("selected-currency").textContent
    expect(selectItem).toBe("EUR");
  });
});

我知道这并不正确,但我要指导我如何篡改真正处理Toggle职能。