overmind/es/ssr.test.js

Frictionless state management

import { Overmind, createOvermindSSR, json, rehydrate } from './';
describe('Mock', () => {
    test('should allow changing the state', () => {
        const state = {
            foo: 'bar',
        };
        const config = {
            state,
        };
        const overmind = createOvermindSSR(config);
        overmind.state.foo = 'bar2';
        expect(overmind.state).toEqual({
            foo: 'bar2',
        });
    });
    test('should return a tree of changes', () => {
        const state = {
            foo: 'bar',
        };
        const config = {
            state,
        };
        const overmind = createOvermindSSR(config);
        overmind.state.foo = 'bar2';
        const mutations = overmind.hydrate();
        expect(mutations[0].method).toBe('set');
        expect(mutations[0].path).toBe('foo');
        expect(mutations[0].args).toEqual(['bar2']);
    });
    test('should rehydrate mutation', () => {
        let mutations = [];
        const state = {
            foo: 'bar',
        };
        const actions = {
            onInitializeOvermind: ({ state }) => {
                rehydrate(state, mutations);
            },
        };
        const config = {
            actions,
            state,
        };
        const overmindSsr = createOvermindSSR(config);
        overmindSsr.state.foo = 'bar2';
        mutations = overmindSsr.hydrate();
        const overmind = new Overmind(config);
        expect(json(overmind.state)).toEqual({
            foo: 'bar2',
        });
    });
});
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