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useRefetchableFragment-test.js
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useRefetchableFragment-test.js
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails oncall+relay
* @flow
* @format
*/
// flowlint ambiguous-object-type:error
'use strict';
const useRefetchableFragmentOriginal = require('../useRefetchableFragment');
const React = require('react');
const ReactRelayContext = require('react-relay/ReactRelayContext');
const TestRenderer = require('react-test-renderer');
const {
FRAGMENT_OWNER_KEY,
FRAGMENTS_KEY,
ID_KEY,
createOperationDescriptor,
getFragment,
getRequest,
graphql,
} = require('relay-runtime');
const {createMockEnvironment} = require('relay-test-utils');
const {useMemo} = React;
describe('useRefetchableFragment', () => {
let environment;
let gqlQuery;
let gqlFragment;
let query;
let variables;
let renderFragment;
let renderSpy;
let Renderer;
function useRefetchableFragment(fragmentNode, fragmentRef) {
const [data, refetch] = useRefetchableFragmentOriginal(
fragmentNode,
// $FlowFixMe[incompatible-call]
// $FlowFixMe[prop-missing]
fragmentRef,
);
renderSpy(data, refetch);
return [data, refetch];
}
function assertCall(expected, idx) {
const actualData = renderSpy.mock.calls[idx][0];
expect(actualData).toEqual(expected.data);
}
function assertFragmentResults(
expectedCalls: $ReadOnlyArray<{|data: $FlowFixMe|}>,
) {
// This ensures that useEffect runs
TestRenderer.act(() => jest.runAllImmediates());
expect(renderSpy).toBeCalledTimes(expectedCalls.length);
expectedCalls.forEach((expected, idx) => assertCall(expected, idx));
renderSpy.mockClear();
}
function expectFragmentResults(expectedCalls) {
assertFragmentResults(expectedCalls);
}
function createFragmentRef(id, owner) {
return {
[ID_KEY]: id,
[FRAGMENTS_KEY]: {
useRefetchableFragmentTestNestedUserFragment: {},
},
[FRAGMENT_OWNER_KEY]: owner.request,
__isWithinUnmatchedTypeRefinement: false,
};
}
beforeEach(() => {
// Set up mocks
jest.resetModules();
jest.spyOn(console, 'warn').mockImplementationOnce(() => {});
jest.mock('warning');
renderSpy = jest.fn();
// Set up environment and base data
environment = createMockEnvironment();
graphql`
fragment useRefetchableFragmentTestNestedUserFragment on User {
username
}
`;
variables = {id: '1', scale: 16};
gqlQuery = getRequest(graphql`
query useRefetchableFragmentTestUserQuery($id: ID!, $scale: Float!) {
node(id: $id) {
...useRefetchableFragmentTestUserFragment
}
}
`);
gqlFragment = getFragment(graphql`
fragment useRefetchableFragmentTestUserFragment on User
@refetchable(
queryName: "useRefetchableFragmentTestUserFragmentRefetchQuery"
) {
id
name
profile_picture(scale: $scale) {
uri
}
...useRefetchableFragmentTestNestedUserFragment
}
`);
query = createOperationDescriptor(gqlQuery, variables);
environment.commitPayload(query, {
node: {
__typename: 'User',
id: '1',
name: 'Alice',
username: 'useralice',
profile_picture: null,
},
});
// Set up renderers
Renderer = props => null;
const Container = (props: {userRef?: {...}, fragment: $FlowFixMe, ...}) => {
// We need a render a component to run a Hook
const artificialUserRef = useMemo(
() => ({
[ID_KEY]:
query.request.variables.id ?? query.request.variables.nodeID,
[FRAGMENTS_KEY]: {
[gqlFragment.name]: {},
},
[FRAGMENT_OWNER_KEY]: query.request,
__isWithinUnmatchedTypeRefinement: false,
}),
[],
);
const [userData] = useRefetchableFragment(gqlFragment, artificialUserRef);
return <Renderer user={userData} />;
};
const ContextProvider = ({children}) => {
const relayContext = useMemo(() => ({environment}), []);
return (
<ReactRelayContext.Provider value={relayContext}>
{children}
</ReactRelayContext.Provider>
);
};
renderFragment = (args?: {
isConcurrent?: boolean,
owner?: $FlowFixMe,
userRef?: $FlowFixMe,
fragment?: $FlowFixMe,
...
}) => {
const {isConcurrent = false, ...props} = args ?? {};
return TestRenderer.create(
<React.Suspense fallback="Fallback">
<ContextProvider>
<Container owner={query} {...props} />
</ContextProvider>
</React.Suspense>,
// $FlowFixMe[prop-missing] - error revealed when flow-typing ReactTestRenderer
{unstable_isConcurrent: isConcurrent},
);
};
});
afterEach(() => {
environment.mockClear();
renderSpy.mockClear();
});
// This test is only a sanity check for useRefetchableFragment as a wrapper
// around useRefetchableFragmentNode.
// See full test behavior in useRefetchableFragmentNode-test.
it('should render fragment without error when data is available', () => {
renderFragment();
expectFragmentResults([
{
data: {
id: '1',
name: 'Alice',
profile_picture: null,
...createFragmentRef('1', query),
},
},
]);
});
});