kibana/test/common/services/randomness.ts
Spencer b601c5c3b4
[ftr] implement FtrService classes and migrate common services (#99546) (#100585)
Co-authored-by: spalger <spalger@users.noreply.github.com>
Co-authored-by: Kibana Machine <42973632+kibanamachine@users.noreply.github.com>
# Conflicts:
#	test/common/services/deployment.ts
#	test/common/services/index.ts
#	test/common/services/saved_object_info.ts
#	test/functional/apps/visualize/index.ts
2021-05-25 16:31:02 -04:00

84 lines
2 KiB
TypeScript

/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
import Chance from 'chance';
import { ToolingLog } from '@kbn/dev-utils';
import { FtrService } from '../ftr_provider_context';
let __CACHED_SEED__: number | undefined;
function getSeed(log: ToolingLog) {
if (__CACHED_SEED__ !== undefined) {
return __CACHED_SEED__;
}
__CACHED_SEED__ = Date.now();
log.debug('randomness seed: %j', __CACHED_SEED__);
return __CACHED_SEED__;
}
interface CharOptions {
pool?: string;
alpha?: boolean;
numeric?: boolean;
symbols?: boolean;
casing?: 'lower' | 'upper';
}
interface StringOptions extends CharOptions {
length?: number;
}
interface NumberOptions {
min?: number;
max?: number;
}
export class RandomnessService extends FtrService {
private readonly chance = new Chance(getSeed(this.ctx.getService('log')));
/**
* Generate a random natural number
*
* range: 0 to 9007199254740991
*
*/
naturalNumber(options?: NumberOptions) {
return this.chance.natural(options);
}
/**
* Generate a random integer
*/
integer(options?: NumberOptions) {
return this.chance.integer(options);
}
/**
* Generate a random number, defaults to at least 4 and no more than 8 syllables
*/
word(options: { syllables?: number } = {}) {
const { syllables = this.naturalNumber({ min: 4, max: 8 }) } = options;
return this.chance.word({
syllables,
});
}
/**
* Generate a random string, defaults to at least 8 and no more than 15 alpha-numeric characters
*/
string(options: StringOptions = {}) {
return this.chance.string({
length: this.naturalNumber({ min: 8, max: 15 }),
...(options.pool === 'undefined' ? { alpha: true, numeric: true, symbols: false } : {}),
...options,
});
}
}