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Merge pull request #1 from ddelgrosso1/tm-performance-framework
feat: add directory generator to performance test framework
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| /*! | ||
| * Copyright 2022 Google LLC. All Rights Reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| import {execSync} from 'child_process'; | ||
| import {mkdirSync} from 'fs'; | ||
| import path = require('path'); | ||
| import * as uuid from 'uuid'; | ||
|
|
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| export const BLOCK_SIZE_IN_BYTES = 1024; | ||
| export const DEFAULT_SMALL_FILE_SIZE_BYTES = 5120; | ||
| export const DEFAULT_LARGE_FILE_SIZE_BYTES = 2.147e9; | ||
|
|
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| const CREATE_DIRECTORY = 1; | ||
|
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||
| /** | ||
| * Create a uniformly distributed random integer beween the inclusive min and max provided. | ||
| * | ||
| * @param {number} minInclusive lower bound (inclusive) of the range of random integer to return. | ||
| * @param {number} maxInclusive upper bound (inclusive) of the range of random integer to return. | ||
| * @returns {number} returns a random integer between minInclusive and maxInclusive | ||
| */ | ||
| export function randomInteger(minInclusive: number, maxInclusive: number) { | ||
| // Utilizing Math.random will generate uniformly distributed random numbers. | ||
| return ( | ||
| Math.floor(Math.random() * (maxInclusive - minInclusive + 1)) + minInclusive | ||
| ); | ||
| } | ||
|
|
||
| /** | ||
| * Creates a random file name by appending a UUID to the baseName. | ||
| * | ||
| * @param {string} baseName the base file name. A random uuid will be appended to this value. | ||
| * | ||
| * @returns {string} random file name that was generated. | ||
| */ | ||
| export function generateRandomFileName(baseName: string): string { | ||
| return `${baseName}.${uuid.v4()}`; | ||
| } | ||
|
|
||
| /** | ||
| * Creates a file with a size between the small (default 5120 bytes) and large (2.147e9 bytes) parameters. | ||
| * The file is filled with random data. | ||
| * | ||
| * @param {string} fileName name of the file to generate. | ||
| * @param {number} fileSizeLowerBoundBytes minimum size of file to generate. | ||
| * @param {number} fileSizeUpperBoundBytes maximum size of file to generate. | ||
| * @param {string} currentDirectory the directory in which to generate the file. | ||
| * | ||
| * @returns {number} the size of the file generated. | ||
| */ | ||
| export function generateRandomFile( | ||
| fileName: string, | ||
| fileSizeLowerBoundBytes: number = DEFAULT_SMALL_FILE_SIZE_BYTES, | ||
| fileSizeUpperBoundBytes: number = DEFAULT_LARGE_FILE_SIZE_BYTES, | ||
| currentDirectory: string = __dirname | ||
| ) { | ||
| const fileSizeBytes = randomInteger( | ||
| fileSizeLowerBoundBytes, | ||
| fileSizeUpperBoundBytes | ||
| ); | ||
| const numberNeeded = Math.ceil(fileSizeBytes / BLOCK_SIZE_IN_BYTES); | ||
| const cmd = `dd if=/dev/urandom of=${currentDirectory}/${fileName} bs=${BLOCK_SIZE_IN_BYTES} count=${numberNeeded} status=none iflag=fullblock`; | ||
| execSync(cmd); | ||
|
|
||
| return fileSizeBytes; | ||
| } | ||
|
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| /** | ||
| * Creates a random directory structure consisting of subdirectories and random files. | ||
| * | ||
| * @param {number} maxObjects the total number of subdirectories and files to generate. | ||
| * @param {string} baseName the starting directory under which everything else is added. File names will have this value prepended. | ||
| * @param {number} fileSizeLowerBoundBytes minimum size of file to generate. | ||
| * @param {number} fileSizeUpperBoundBytes maximum size of file to generate. | ||
| */ | ||
| export function generateRandomDirectoryStructure( | ||
| maxObjects: number, | ||
| baseName: string, | ||
| fileSizeLowerBoundBytes: number = DEFAULT_SMALL_FILE_SIZE_BYTES, | ||
| fileSizeUpperBoundBytes: number = DEFAULT_LARGE_FILE_SIZE_BYTES | ||
| ) { | ||
| let curPath = baseName; | ||
| for (let i = 0; i < maxObjects; i++) { | ||
| const dirOrFile = randomInteger(0, 1); | ||
| if (dirOrFile === CREATE_DIRECTORY) { | ||
| curPath = path.join(curPath, uuid.v4()); | ||
| mkdirSync(curPath, {recursive: true}); | ||
| } else { | ||
| generateRandomFile( | ||
| generateRandomFileName(baseName), | ||
| fileSizeLowerBoundBytes, | ||
| fileSizeUpperBoundBytes, | ||
| curPath | ||
| ); | ||
| } | ||
| } | ||
| } |