736 lines
22 KiB
TypeScript
736 lines
22 KiB
TypeScript
import * as plugins from './smartexpect.plugins.js';
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export type TExecutionType = 'sync' | 'async';
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export class Assertion {
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executionMode: TExecutionType;
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baseReference: any;
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propertyDrillDown: Array<string | number> = [];
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private notSetting = false;
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private timeoutSetting = 0;
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private failMessage: string;
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private successMessage: string;
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constructor(baseReferenceArg: any, executionModeArg: TExecutionType) {
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this.baseReference = baseReferenceArg;
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this.executionMode = executionModeArg;
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}
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private getObjectToTestReference() {
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let returnObjectToTestReference = this.baseReference;
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for (const property of this.propertyDrillDown) {
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if (returnObjectToTestReference == null) {
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// if it's null or undefined, stop
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break;
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}
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// We just directly access with bracket notation.
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// If property is a string, it's like obj["someProp"];
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// If property is a number, it's like obj[0].
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returnObjectToTestReference = returnObjectToTestReference[property];
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}
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return returnObjectToTestReference;
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}
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private formatDrillDown(): string {
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if (!this.propertyDrillDown || this.propertyDrillDown.length === 0) {
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return '';
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}
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const path = this.propertyDrillDown.map(prop => {
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if (typeof prop === 'number') {
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return `[${prop}]`;
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} else {
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return `.${prop}`;
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}
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}).join('');
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return path;
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}
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private formatValue(value: any): string {
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if (value === null) {
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return 'null';
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} else if (value === undefined) {
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return 'undefined';
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} else if (typeof value === 'object') {
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try {
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return JSON.stringify(value);
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} catch (e) {
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return `[Object ${value.constructor.name}]`;
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}
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} else if (typeof value === 'function') {
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return `[Function${value.name ? ': ' + value.name : ''}]`;
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} else if (typeof value === 'string') {
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return `"${value}"`;
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} else {
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return String(value);
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}
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}
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private createErrorMessage(message: string): string {
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if (this.failMessage) {
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return this.failMessage;
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}
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const testValue = this.getObjectToTestReference();
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const formattedValue = this.formatValue(testValue);
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const drillDown = this.formatDrillDown();
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// Replace placeholders in the message
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return message
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.replace('{value}', formattedValue)
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.replace('{path}', drillDown || '');
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}
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public get not() {
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this.notSetting = true;
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return this;
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}
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public timeout(millisArg: number) {
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this.timeoutSetting = millisArg;
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return this;
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}
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public setFailMessage(failMessageArg: string) {
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this.failMessage = failMessageArg;
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return this;
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}
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public setSuccessMessage(successMessageArg: string) {
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this.successMessage = successMessageArg;
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return this;
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}
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private runCheck(checkFunction: () => any) {
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const runDirectOrNegated = (checkFunction: () => any) => {
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if (!this.notSetting) {
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return checkFunction();
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} else {
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let isOk = false;
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try {
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runDirectOrNegated(checkFunction());
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} catch (e) {
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isOk = true;
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}
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if (!isOk) {
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throw new Error(this.failMessage || 'Negated assertion failed');
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}
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}
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};
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if (this.executionMode === 'async') {
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const done = plugins.smartpromise.defer();
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if (!(this.baseReference instanceof Promise)) {
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done.reject(new Error(`Expected a Promise but received: ${this.formatValue(this.baseReference)}`));
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} else {
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if (this.timeoutSetting) {
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plugins.smartdelay.delayFor(this.timeoutSetting).then(() => {
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if (done.status === 'pending') {
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done.reject(new Error(`Promise timed out after ${this.timeoutSetting}ms`));
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}
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});
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}
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this.baseReference.then((promiseResultArg: any) => {
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this.baseReference = promiseResultArg;
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done.resolve(runDirectOrNegated(checkFunction));
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});
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}
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return done.promise;
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} else {
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return runDirectOrNegated(checkFunction);
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}
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}
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public toBeDefined() {
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return this.runCheck(() => {
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if (this.getObjectToTestReference() === undefined) {
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throw new Error(
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this.createErrorMessage('Expected value{path} to be defined, but got undefined')
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);
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}
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});
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}
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public toBeTypeofString() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (typeof value !== 'string') {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be of type string, but got ${typeof value}`)
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);
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}
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});
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}
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public toBeTypeofNumber() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (typeof value !== 'number') {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be of type number, but got ${typeof value}`)
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);
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}
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});
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}
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public toBeTypeofBoolean() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (typeof value !== 'boolean') {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be of type boolean, but got ${typeof value}`)
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);
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}
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});
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}
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public toBeTypeOf(expectedType: string) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const actualType = typeof value;
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if (actualType !== expectedType) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be of type ${expectedType}, but got ${actualType}`)
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);
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}
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});
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}
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public toEqual(comparisonObject: any) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = plugins.fastDeepEqual(value, comparisonObject);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to equal ${this.formatValue(comparisonObject)}`)
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);
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}
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});
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}
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public toMatch(comparisonObject: RegExp) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = comparisonObject.test(value);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to match regex ${comparisonObject}`)
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);
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}
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});
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}
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public toBeTrue() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = typeof value === 'boolean' && value === true;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be true, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeFalse() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = typeof value === 'boolean' && value === false;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be false, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeInstanceOf(classArg: any) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value instanceof classArg;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be an instance of ${classArg.name || 'provided class'}`)
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);
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}
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});
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}
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public toHaveProperty(propertyArg: string, equalsArg?: any) {
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return this.runCheck(() => {
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const obj = this.getObjectToTestReference();
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if (!obj || !(propertyArg in obj)) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to have property '${propertyArg}'`)
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);
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}
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if (equalsArg !== undefined) {
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if (obj[propertyArg] !== equalsArg) {
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throw new Error(
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this.createErrorMessage(
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`Expected property '${propertyArg}' of value{path} to equal ${this.formatValue(equalsArg)}, but got ${this.formatValue(obj[propertyArg])}`
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)
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);
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}
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}
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});
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}
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public toHaveDeepProperty(properties: string[]) {
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return this.runCheck(() => {
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let obj = this.getObjectToTestReference();
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let currentPath = '';
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for (const property of properties) {
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if (currentPath) {
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currentPath += `.${property}`;
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} else {
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currentPath = property;
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}
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if (!obj || !(property in obj)) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to have property at path '${currentPath}'`)
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);
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}
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obj = obj[property];
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}
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});
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}
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public toBeGreaterThan(numberArg: number) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value > numberArg;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be greater than ${numberArg}, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeLessThan(numberArg: number) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value < numberArg;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be less than ${numberArg}, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeNull() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value === null;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be null, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeUndefined() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value === undefined;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be undefined, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toBeNullOrUndefined() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = value === null || value === undefined;
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be null or undefined, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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// Array checks
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public toContain(itemArg: any) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = Array.isArray(value) && value.includes(itemArg);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected array{path} to contain ${this.formatValue(itemArg)}`)
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);
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}
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});
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}
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public toBeEmptyArray() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (!Array.isArray(value)) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be an array, but got ${typeof value}`)
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);
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}
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if (value.length !== 0) {
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throw new Error(
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this.createErrorMessage(`Expected array{path} to be empty, but it has ${value.length} elements`)
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);
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}
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});
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}
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public toContainAll(values: any[]) {
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return this.runCheck(() => {
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const arr = this.getObjectToTestReference();
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if (!Array.isArray(arr)) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be an array, but got ${typeof arr}`)
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);
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}
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const missing = values.filter(v => !arr.includes(v));
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if (missing.length > 0) {
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throw new Error(
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this.createErrorMessage(`Expected array{path} to contain all values ${this.formatValue(values)}, but missing: ${this.formatValue(missing)}`)
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);
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}
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});
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}
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public toExclude(value: any) {
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return this.runCheck(() => {
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const arr = this.getObjectToTestReference();
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if (!Array.isArray(arr)) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be an array, but got ${typeof arr}`)
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);
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}
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if (arr.includes(value)) {
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throw new Error(
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this.createErrorMessage(`Expected array{path} to exclude ${this.formatValue(value)}, but it was found`)
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);
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}
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});
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}
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public toStartWith(itemArg: any) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = typeof value === 'string' && value.startsWith(itemArg);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected string{path} to start with "${itemArg}", but got "${value}"`)
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);
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}
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});
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}
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public toEndWith(itemArg: any) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = typeof value === 'string' && value.endsWith(itemArg);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected string{path} to end with "${itemArg}", but got "${value}"`)
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);
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}
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});
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}
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public toBeOneOf(values: any[]) {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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const result = values.includes(value);
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if (!result) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be one of ${this.formatValue(values)}, but got ${this.formatValue(value)}`)
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);
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}
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});
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}
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public toHaveLength(length: number) {
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return this.runCheck(() => {
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const obj = this.getObjectToTestReference();
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if (typeof obj.length !== 'number') {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to have a length property, but it doesn't`)
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);
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}
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if (obj.length !== length) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to have length ${length}, but got length ${obj.length}`)
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);
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}
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});
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}
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public toBeCloseTo(value: number, precision = 2) {
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return this.runCheck(() => {
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const actual = this.getObjectToTestReference();
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const difference = Math.abs(actual - value);
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const epsilon = Math.pow(10, -precision) / 2;
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if (difference > epsilon) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be close to ${value} (within ${epsilon}), but the difference was ${difference}`)
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);
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}
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});
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}
|
|
|
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public toThrow(expectedError?: any) {
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return this.runCheck(() => {
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const fn = this.getObjectToTestReference();
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if (typeof fn !== 'function') {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be a function, but got ${typeof fn}`)
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);
|
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}
|
|
|
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let thrown = false;
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let error: any;
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try {
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fn();
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} catch (e) {
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thrown = true;
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error = e;
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if (expectedError && !(e instanceof expectedError)) {
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throw new Error(
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this.createErrorMessage(`Expected function{path} to throw ${expectedError.name}, but it threw ${e.constructor.name}`)
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);
|
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}
|
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}
|
|
|
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if (!thrown) {
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throw new Error(
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this.createErrorMessage(`Expected function{path} to throw, but it didn't throw any error`)
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);
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}
|
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});
|
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}
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public toBeTruthy() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (!value) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be truthy, but got ${this.formatValue(value)}`)
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);
|
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}
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});
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}
|
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public toBeFalsy() {
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return this.runCheck(() => {
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const value = this.getObjectToTestReference();
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if (value) {
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throw new Error(
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this.createErrorMessage(`Expected value{path} to be falsy, but got ${this.formatValue(value)}`)
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);
|
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}
|
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});
|
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}
|
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|
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public toBeGreaterThanOrEqual(numberArg: number) {
|
|
return this.runCheck(() => {
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const value = this.getObjectToTestReference();
|
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if (value < numberArg) {
|
|
throw new Error(
|
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this.createErrorMessage(`Expected value{path} to be greater than or equal to ${numberArg}, but got ${value}`)
|
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);
|
|
}
|
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});
|
|
}
|
|
|
|
public toBeLessThanOrEqual(numberArg: number) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
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if (value > numberArg) {
|
|
throw new Error(
|
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this.createErrorMessage(`Expected value{path} to be less than or equal to ${numberArg}, but got ${value}`)
|
|
);
|
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}
|
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});
|
|
}
|
|
|
|
public toMatchObject(objectArg: object) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
const matchResult = plugins.fastDeepEqual(value, objectArg);
|
|
if (!matchResult) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to match ${this.formatValue(objectArg)}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toContainEqual(value: any) {
|
|
return this.runCheck(() => {
|
|
const arr = this.getObjectToTestReference();
|
|
if (!Array.isArray(arr)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be an array, but got ${typeof arr}`)
|
|
);
|
|
}
|
|
|
|
const found = arr.some((item: any) => plugins.fastDeepEqual(item, value));
|
|
if (!found) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected array{path} to contain an item equal to ${this.formatValue(value)}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toBeArray() {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (!Array.isArray(value)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be an array, but got ${typeof value}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toInclude(substring: string) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (typeof value !== 'string') {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be a string, but got ${typeof value}`)
|
|
);
|
|
}
|
|
if (!value.includes(substring)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected string{path} to include "${substring}", but it doesn't`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toHaveLengthGreaterThan(length: number) {
|
|
return this.runCheck(() => {
|
|
const obj = this.getObjectToTestReference();
|
|
if (typeof obj.length !== 'number') {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to have a length property, but it doesn't`)
|
|
);
|
|
}
|
|
if (obj.length <= length) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to have length greater than ${length}, but got length ${obj.length}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toHaveLengthLessThan(length: number) {
|
|
return this.runCheck(() => {
|
|
const obj = this.getObjectToTestReference();
|
|
if (typeof obj.length !== 'number') {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to have a length property, but it doesn't`)
|
|
);
|
|
}
|
|
if (obj.length >= length) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to have length less than ${length}, but got length ${obj.length}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toBeDate() {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (!(value instanceof Date)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be a Date, but got ${value.constructor ? value.constructor.name : typeof value}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toBeBeforeDate(date: Date) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (!(value instanceof Date)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be a Date, but got ${value.constructor ? value.constructor.name : typeof value}`)
|
|
);
|
|
}
|
|
if (value >= date) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected date{path} to be before ${date.toISOString()}, but got ${value.toISOString()}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public toBeAfterDate(date: Date) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (!(value instanceof Date)) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected value{path} to be a Date, but got ${value.constructor ? value.constructor.name : typeof value}`)
|
|
);
|
|
}
|
|
if (value <= date) {
|
|
throw new Error(
|
|
this.createErrorMessage(`Expected date{path} to be after ${date.toISOString()}, but got ${value.toISOString()}`)
|
|
);
|
|
}
|
|
});
|
|
}
|
|
|
|
public customAssertion(
|
|
assertionFunction: (value: any) => boolean,
|
|
errorMessage: string
|
|
) {
|
|
return this.runCheck(() => {
|
|
const value = this.getObjectToTestReference();
|
|
if (!assertionFunction(value)) {
|
|
throw new Error(this.failMessage || errorMessage);
|
|
}
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Drill into a property
|
|
*/
|
|
public property(propertyNameArg: string) {
|
|
this.propertyDrillDown.push(propertyNameArg);
|
|
return this;
|
|
}
|
|
|
|
/**
|
|
* Drill into an array index
|
|
*/
|
|
public arrayItem(indexArg: number) {
|
|
// Save the number (instead of "[index]")
|
|
this.propertyDrillDown.push(indexArg);
|
|
return this;
|
|
}
|
|
|
|
public log() {
|
|
console.log(`Current value:`);
|
|
console.log(JSON.stringify(this.getObjectToTestReference(), null, 2));
|
|
console.log(`Path: ${this.formatDrillDown() || '(root)'}`);
|
|
return this;
|
|
}
|
|
} |