1 | import * as _ from 'lodash';
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2 | import { SinonSpy } from 'sinon';
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3 | import { flushMicrotasks, rlQueueRequest } from './fakeAsync';
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4 |
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5 | export interface IMockPromiseService {
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6 | promise<TData>(result?: TData | { (...args: any[]): TData }, share?: boolean): IMockedPromise<TData>;
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7 | rejectedPromise<TData>(...params: any[]): IMockedPromise<TData>;
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8 | flushAll(service: any): void;
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9 | }
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10 |
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11 | export interface IMockedPromise<TData> extends SinonSpy {
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12 | (...args: any[]): Promise<TData>;
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13 | reject(...params: any[]): void;
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14 | rejected: boolean;
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15 | flush(): void;
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16 | share(share?: boolean): void;
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17 | }
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18 |
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19 | interface IMockedPromiseInternal<TData> extends IMockedPromise<TData> {
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20 | rejectParams: any[];
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21 | }
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22 |
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23 | class MockPromiseService implements IMockPromiseService {
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24 | promise<TData>(result?: TData | { (...args: any[]): TData }, share?: boolean): IMockedPromise<TData> {
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25 | if (_.isUndefined(share)) {
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26 | share = false;
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27 | }
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28 |
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29 | if (_.isFunction(result)) {
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30 | return this.makeDynamicMockPromise(<{ (...args: any[]): TData }>result, share);
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31 | } else {
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32 | return this.makeMockPromise(<TData>result, share);
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33 | }
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34 | }
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35 |
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36 | rejectedPromise<TData>(...params: any[]): IMockedPromise<TData> {
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37 | let mocked: IMockedPromiseInternal<TData> = this.makeMockPromise(null, false);
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38 | mocked.rejected = true;
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39 | mocked.rejectParams = params;
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40 | return mocked;
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41 | }
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42 |
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43 | flushAll(service: any): void {
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44 | _.each(service, (promise: IMockedPromise<any>): void => {
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45 | if (promise && _.isFunction(promise.flush)) {
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46 | promise.flush();
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47 | }
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48 | })
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49 | }
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50 |
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51 | private makeMockPromise<TData>(result: TData, share: boolean): IMockedPromiseInternal<TData> {
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52 | return this.makeDynamicMockPromise(() => result, share);
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53 | }
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54 |
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55 | private makeDynamicMockPromise<TData>(result: { (...args: any[]): TData }, shareParam: boolean): IMockedPromiseInternal<TData> {
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56 | let share: boolean = shareParam;
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57 | interface IRequestType {
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58 | resolve: Function;
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59 | reject: Function;
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60 | params: any[];
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61 | promise: Promise<TData>;
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62 | rejected: boolean;
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63 | rejectParams: any[];
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64 | pending: boolean;
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65 | };
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66 |
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67 | let requests: IRequestType[] = [];
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68 | let mocked: IMockedPromiseInternal<TData>;
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69 |
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70 |
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71 | let promiseBuilder: any = ((...args: any[]): Promise<TData> => {
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72 | if (share && _.some(requests)) {
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73 | return _.first(requests).promise;
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74 | }
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75 |
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76 | let newRequest: IRequestType = {
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77 | resolve: null,
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78 | reject: null,
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79 | params: args,
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80 | promise: null,
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81 | rejected: mocked.rejected,
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82 | rejectParams: mocked.rejectParams,
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83 | pending: true,
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84 | };
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85 |
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86 | newRequest.promise = new Promise<TData>(function (resolve, reject) {
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87 | newRequest.resolve = resolve;
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88 | newRequest.reject = reject;
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89 | });
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90 |
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91 | requests.push(newRequest);
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92 |
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93 | rlQueueRequest(newRequest);
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94 |
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95 | return newRequest.promise;
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96 | });
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97 |
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98 | let spiedBuilder: any = sinon.spy(promiseBuilder);
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99 | mocked = <IMockedPromiseInternal<TData>> spiedBuilder;
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100 |
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101 |
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102 | mocked.reject = (...params: any[]) => {
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103 | mocked.rejected = true;
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104 | mocked.rejectParams = params;
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105 | };
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106 |
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107 |
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108 | mocked.share = (shareParam?: boolean) => {
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109 | if (_.isUndefined(shareParam)) {
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110 | share = true;
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111 | }
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112 |
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113 | share = shareParam;
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114 | };
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115 |
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116 |
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117 | mocked.flush = (): void => {
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118 | _.each(requests, (request: IRequestType): void => {
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119 | request.pending = false;
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120 | if (request.rejected) {
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121 | request.reject(...request.rejectParams);
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122 | } else {
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123 | request.resolve(result(...request.params));
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124 | }
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125 | });
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126 | requests = [];
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127 | flushMicrotasks();
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128 | };
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129 |
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130 | return mocked;
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131 | }
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132 | }
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133 |
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134 | export const mockPromise: IMockPromiseService = new MockPromiseService();
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