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[英]How I can specify GraphQL query for Apollo Client and get items which property has an occurrence of the appropriate string
[英]How can I properly test a component which is an Apollo GraphQL query?
在進行相同測試幾個小時后,我感到沮喪。 我有一個返回查詢組件datatable
。 該組件我已經對其進行了測試,並且具有100%的測試覆蓋率。
該測試聲稱缺少第42、145、148、151行的覆蓋范圍(請參閱下面的組件以查看有關這些行的注釋)。
如果您一直看到組件的末尾,它就會聲稱覆蓋了某些操作處理程序。
但是現在我正在測試它的父組件:
// imports
const GetShipments = ({
t,
shipmentsPaginationHandler,
toggleFiltersModalHandler,
isFiltersModalOpened,
}) => {
const removeFilterConst = filterKey => () => {
removeFilterHandler(filterKey);
};
return (
<>
<TableToolbarComp
toggleFiltersModal={toggleFiltersModalHandler} // LINE 42
isFiltersModalOpened={isFiltersModalOpened}
removeFilter={removeFilterConst}
/>
<Query
query={GET_SHIPMENTS}
variables={{
...filters,
shippedDate: filters.shippedDate,
limit: pagination.pageSize,
offset: (pagination.page - 1) * pagination.pageSize,
}}
context={{ uri: `/this?url=${softlayerAccountId}` }}
>
{({ loading, error, data }) => {
let tableRowsModel;
let itemsCount;
if (error) {
return (...);
}
if (loading) return (...);
if (data && data.GetShipments) {
({ itemsCount } = data.GetShipments);
if (data.GetShipments.shipments) {
tableRowsModel = data.GetShipments.shipments.map(row => ({
...row,
id: `${row.id}`,
type: row.type.name : '',
status: row.status ? row.status.name : '',
}));
} else {
tableRowsModel = [];
}
setCSVDataHandler(data.GetShipments);
}
return (
<ShipmentsTable tableRows={tableRowsModel} />
);
}}
</Query>
</>
);
};
GetShipments.propTypes = {
// propTypes validation
};
export default compose(
connect(
store => ({
softlayerAccountId: store.global.softlayerAccountId,
isFiltersModalOpened: store.shipments.filtersModalOpened,
}),
dispatch => ({
removeFilterHandler: filterKey => {
dispatch(removeFilter(filterKey));
},
toggleFiltersModalHandler: () => {
dispatch(toggleFiltersModal()); // LINE 145
},
}),
),
translate(),
)(GetShipments);
我創建的大多數測試似乎只是忽略了我在做什么。
這是我到目前為止的內容:
import React from 'react';
import { MockedProvider } from 'react-apollo/test-utils';
import { mount } from 'enzyme';
import { Provider as ReduxProvider } from 'react-redux';
import GetShipments from '../../containers/GetShipments';
import createMockStore from '../../../../utils/createMockStore';
import store from '../../../../redux/store';
import mocks from '../../__fixtures__/shipments-mock';
jest.mock('react-i18next', () => ({
// this mock makes sure any components using the translate HoC receive the t function as a prop
translate: () => Component => {
Component.defaultProps = { ...Component.defaultProps, t: key => key };
return Component;
},
}));
describe('Container to test: GetShipments', () => {
let props;
beforeEach(() => {
props = {
t: jest.fn(() => k => k),
softlayerAccountId: 123,
isFiltersModalOpened: false,
toggleFiltersModalHandler: jest.fn(() => k => k),
setFiltersHandler: jest.fn(() => k => k),
removeFilterHandler: jest.fn(() => k => k),
};
});
it('should render without errors', () => {
mount(
<MockedProvider
mocks={mocks.filter(mock => mock.id === 'get-shipments-default')}
>
<ReduxProvider store={store}>
<GetShipments
{...props}
store={createMockStore({
global: {
accountGuid: 'abcd-1234',
softlayerAccountId: '1234',
},
})}
/>
</ReduxProvider>
</MockedProvider>,
);
});
it('should render loading state initially', () => {
const wrapper = mount(
<MockedProvider mocks={[]} addTypename={false}>
<ReduxProvider store={store}>
<GetShipments {...props} />
</ReduxProvider>
</MockedProvider>,
);
expect(wrapper.find('DataTableSkeleton')).toHaveLength(1);
});
it('should render data', async () => {
const wrapper = mount(
<MockedProvider mocks={mocks} addTypename={false}>
<ReduxProvider store={store}>
<GetShipments store={store} {...props} />
</ReduxProvider>
</MockedProvider>,
);
await new Promise(resolve => setTimeout(resolve));
await wrapper.update();
console.log(wrapper.debug());
});
it('should NOT render any data', () => {
mount(
<MockedProvider mocks={[]} addTypename={false}>
<GetShipments store={store} />
</MockedProvider>,
);
});
});
那我想念什么呢?
首先,您似乎在許多測試中都缺少斷言。 這是有目的的嗎? 例如,我希望您在第一個測試用例中使用快照斷言(“它應呈現無錯誤”)。 唯一可以斷言的測試用例是“應該呈現加載狀態”。
關於缺少的覆蓋范圍,在沒有看到完整的Jest測試報告的情況下,我僅假設您突出顯示的功能從未運行過,即您沒有在執行toggleFiltersModalHandler
時測試dispatch(toggleFiltersModal())
是否正在運行。 為了達到100%的測試覆蓋率,您需要測試這些功能。 當您使用酶時,這可能很簡單:
const wrapper = mount(
<MockedProvider mocks={mocks} addTypename={false}>
<ReduxProvider store={store}>
<GetShipments store={store} {...props} />
</ReduxProvider>
</MockedProvider>
);
wrapper.props().toggleFiltersModalHandler();
不幸的是,在使用HOC時,很可能必須先find
組件,然后才能在prop上執行功能,如下所示:
const wrapper = mount(
<MockedProvider mocks={mocks} addTypename={false}>
<ReduxProvider store={store}>
<GetShipments store={store} {...props} />
</ReduxProvider>
</MockedProvider>
);
wrapper.find(GetShipments).props().toggleFiltersModalHandler();
毫無疑問,您必須進行一些試驗和錯誤才能在包裝器中找到該道具,但是一旦找到它,只需執行它並斷言該函數已經使用了一個開玩笑的間諜來執行。
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