106 lines
3.1 KiB
JavaScript
106 lines
3.1 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* @flow-broken
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*/
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'use strict';
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jest
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.dontMock('NavigationStackReducer')
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.dontMock('NavigationStateUtils');
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jest.setMock('React', {Component() {}, PropTypes: {}});
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const NavigationStackReducer = require('NavigationStackReducer');
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const NavigationRootContainer = require('NavigationRootContainer');
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describe('NavigationStackReducer', () => {
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it('provides default/initial state', () => {
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const initialState = {
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children: [
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{key: 'a'},
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],
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index: 0,
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key: 'myStack',
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};
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const reducer = NavigationStackReducer({
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getPushedReducerForAction: (action) => null,
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getReducerForState: (state) => () => state,
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initialState,
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});
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const dummyAction = {type: 'dummyAction'};
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expect(reducer(null, dummyAction)).toBe(initialState);
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});
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it('handles basic reducer pushing', () => {
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const reducer = NavigationStackReducer({
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getPushedReducerForAction: (action) => {
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if (action.type === 'TestPushAction') {
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return (state) => state || {key: action.testValue};
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}
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return null;
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},
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getReducerForState: (state) => () => state,
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initialState: {
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children: [
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{key: 'first'},
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],
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index: 0,
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key: 'myStack'
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}
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});
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const state1 = reducer(null, {type: 'default'});
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expect(state1.children.length).toBe(1);
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expect(state1.children[0].key).toBe('first');
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expect(state1.index).toBe(0);
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const action = {type: 'TestPushAction', testValue: 'second'};
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const state2 = reducer(state1, action);
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expect(state2.children.length).toBe(2);
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expect(state2.children[0].key).toBe('first');
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expect(state2.children[1].key).toBe('second');
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expect(state2.index).toBe(1);
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});
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it('handles BackAction', () => {
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const reducer = NavigationStackReducer({
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getPushedReducerForAction: (action) => {
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if (action.type === 'TestPushAction') {
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return (state) => state || {key: action.testValue};
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}
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return null;
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},
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getReducerForState: (state) => () => state,
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initialState: {
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children: [
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{key: 'a'},
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{key: 'b'},
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],
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index: 1,
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key: 'myStack',
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},
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});
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const state1 = reducer(null, {type: 'MyDefaultAction'});
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expect(state1.children[0].key).toBe('a');
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expect(state1.children[1].key).toBe('b');
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expect(state1.children.length).toBe(2);
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expect(state1.index).toBe(1);
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expect(state1.key).toBe('myStack');
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const state2 = reducer(state1, NavigationRootContainer.getBackAction());
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expect(state2.children[0].key).toBe('a');
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expect(state2.children.length).toBe(1);
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expect(state2.index).toBe(0);
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const state3 = reducer(state2, NavigationRootContainer.getBackAction());
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expect(state3).toBe(state2);
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});
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}); |