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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-21 20:56:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-21 20:56:19 +0000 |
commit | 0b6210cd37b68b94252cb798598b12974a20e1c1 (patch) | |
tree | e371686554a877842d95aa94f100bee552ff2a8e /lib/mock/mock-utils.js | |
parent | Initial commit. (diff) | |
download | node-undici-0b6210cd37b68b94252cb798598b12974a20e1c1.tar.xz node-undici-0b6210cd37b68b94252cb798598b12974a20e1c1.zip |
Adding upstream version 5.28.2+dfsg1+~cs23.11.12.3.upstream/5.28.2+dfsg1+_cs23.11.12.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/mock/mock-utils.js')
-rw-r--r-- | lib/mock/mock-utils.js | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/lib/mock/mock-utils.js b/lib/mock/mock-utils.js new file mode 100644 index 0000000..42ea185 --- /dev/null +++ b/lib/mock/mock-utils.js @@ -0,0 +1,351 @@ +'use strict' + +const { MockNotMatchedError } = require('./mock-errors') +const { + kDispatches, + kMockAgent, + kOriginalDispatch, + kOrigin, + kGetNetConnect +} = require('./mock-symbols') +const { buildURL, nop } = require('../core/util') +const { STATUS_CODES } = require('http') +const { + types: { + isPromise + } +} = require('util') + +function matchValue (match, value) { + if (typeof match === 'string') { + return match === value + } + if (match instanceof RegExp) { + return match.test(value) + } + if (typeof match === 'function') { + return match(value) === true + } + return false +} + +function lowerCaseEntries (headers) { + return Object.fromEntries( + Object.entries(headers).map(([headerName, headerValue]) => { + return [headerName.toLocaleLowerCase(), headerValue] + }) + ) +} + +/** + * @param {import('../../index').Headers|string[]|Record<string, string>} headers + * @param {string} key + */ +function getHeaderByName (headers, key) { + if (Array.isArray(headers)) { + for (let i = 0; i < headers.length; i += 2) { + if (headers[i].toLocaleLowerCase() === key.toLocaleLowerCase()) { + return headers[i + 1] + } + } + + return undefined + } else if (typeof headers.get === 'function') { + return headers.get(key) + } else { + return lowerCaseEntries(headers)[key.toLocaleLowerCase()] + } +} + +/** @param {string[]} headers */ +function buildHeadersFromArray (headers) { // fetch HeadersList + const clone = headers.slice() + const entries = [] + for (let index = 0; index < clone.length; index += 2) { + entries.push([clone[index], clone[index + 1]]) + } + return Object.fromEntries(entries) +} + +function matchHeaders (mockDispatch, headers) { + if (typeof mockDispatch.headers === 'function') { + if (Array.isArray(headers)) { // fetch HeadersList + headers = buildHeadersFromArray(headers) + } + return mockDispatch.headers(headers ? lowerCaseEntries(headers) : {}) + } + if (typeof mockDispatch.headers === 'undefined') { + return true + } + if (typeof headers !== 'object' || typeof mockDispatch.headers !== 'object') { + return false + } + + for (const [matchHeaderName, matchHeaderValue] of Object.entries(mockDispatch.headers)) { + const headerValue = getHeaderByName(headers, matchHeaderName) + + if (!matchValue(matchHeaderValue, headerValue)) { + return false + } + } + return true +} + +function safeUrl (path) { + if (typeof path !== 'string') { + return path + } + + const pathSegments = path.split('?') + + if (pathSegments.length !== 2) { + return path + } + + const qp = new URLSearchParams(pathSegments.pop()) + qp.sort() + return [...pathSegments, qp.toString()].join('?') +} + +function matchKey (mockDispatch, { path, method, body, headers }) { + const pathMatch = matchValue(mockDispatch.path, path) + const methodMatch = matchValue(mockDispatch.method, method) + const bodyMatch = typeof mockDispatch.body !== 'undefined' ? matchValue(mockDispatch.body, body) : true + const headersMatch = matchHeaders(mockDispatch, headers) + return pathMatch && methodMatch && bodyMatch && headersMatch +} + +function getResponseData (data) { + if (Buffer.isBuffer(data)) { + return data + } else if (typeof data === 'object') { + return JSON.stringify(data) + } else { + return data.toString() + } +} + +function getMockDispatch (mockDispatches, key) { + const basePath = key.query ? buildURL(key.path, key.query) : key.path + const resolvedPath = typeof basePath === 'string' ? safeUrl(basePath) : basePath + + // Match path + let matchedMockDispatches = mockDispatches.filter(({ consumed }) => !consumed).filter(({ path }) => matchValue(safeUrl(path), resolvedPath)) + if (matchedMockDispatches.length === 0) { + throw new MockNotMatchedError(`Mock dispatch not matched for path '${resolvedPath}'`) + } + + // Match method + matchedMockDispatches = matchedMockDispatches.filter(({ method }) => matchValue(method, key.method)) + if (matchedMockDispatches.length === 0) { + throw new MockNotMatchedError(`Mock dispatch not matched for method '${key.method}'`) + } + + // Match body + matchedMockDispatches = matchedMockDispatches.filter(({ body }) => typeof body !== 'undefined' ? matchValue(body, key.body) : true) + if (matchedMockDispatches.length === 0) { + throw new MockNotMatchedError(`Mock dispatch not matched for body '${key.body}'`) + } + + // Match headers + matchedMockDispatches = matchedMockDispatches.filter((mockDispatch) => matchHeaders(mockDispatch, key.headers)) + if (matchedMockDispatches.length === 0) { + throw new MockNotMatchedError(`Mock dispatch not matched for headers '${typeof key.headers === 'object' ? JSON.stringify(key.headers) : key.headers}'`) + } + + return matchedMockDispatches[0] +} + +function addMockDispatch (mockDispatches, key, data) { + const baseData = { timesInvoked: 0, times: 1, persist: false, consumed: false } + const replyData = typeof data === 'function' ? { callback: data } : { ...data } + const newMockDispatch = { ...baseData, ...key, pending: true, data: { error: null, ...replyData } } + mockDispatches.push(newMockDispatch) + return newMockDispatch +} + +function deleteMockDispatch (mockDispatches, key) { + const index = mockDispatches.findIndex(dispatch => { + if (!dispatch.consumed) { + return false + } + return matchKey(dispatch, key) + }) + if (index !== -1) { + mockDispatches.splice(index, 1) + } +} + +function buildKey (opts) { + const { path, method, body, headers, query } = opts + return { + path, + method, + body, + headers, + query + } +} + +function generateKeyValues (data) { + return Object.entries(data).reduce((keyValuePairs, [key, value]) => [ + ...keyValuePairs, + Buffer.from(`${key}`), + Array.isArray(value) ? value.map(x => Buffer.from(`${x}`)) : Buffer.from(`${value}`) + ], []) +} + +/** + * @see https://developer.mozilla.org/en-US/docs/Web/HTTP/Status + * @param {number} statusCode + */ +function getStatusText (statusCode) { + return STATUS_CODES[statusCode] || 'unknown' +} + +async function getResponse (body) { + const buffers = [] + for await (const data of body) { + buffers.push(data) + } + return Buffer.concat(buffers).toString('utf8') +} + +/** + * Mock dispatch function used to simulate undici dispatches + */ +function mockDispatch (opts, handler) { + // Get mock dispatch from built key + const key = buildKey(opts) + const mockDispatch = getMockDispatch(this[kDispatches], key) + + mockDispatch.timesInvoked++ + + // Here's where we resolve a callback if a callback is present for the dispatch data. + if (mockDispatch.data.callback) { + mockDispatch.data = { ...mockDispatch.data, ...mockDispatch.data.callback(opts) } + } + + // Parse mockDispatch data + const { data: { statusCode, data, headers, trailers, error }, delay, persist } = mockDispatch + const { timesInvoked, times } = mockDispatch + + // If it's used up and not persistent, mark as consumed + mockDispatch.consumed = !persist && timesInvoked >= times + mockDispatch.pending = timesInvoked < times + + // If specified, trigger dispatch error + if (error !== null) { + deleteMockDispatch(this[kDispatches], key) + handler.onError(error) + return true + } + + // Handle the request with a delay if necessary + if (typeof delay === 'number' && delay > 0) { + setTimeout(() => { + handleReply(this[kDispatches]) + }, delay) + } else { + handleReply(this[kDispatches]) + } + + function handleReply (mockDispatches, _data = data) { + // fetch's HeadersList is a 1D string array + const optsHeaders = Array.isArray(opts.headers) + ? buildHeadersFromArray(opts.headers) + : opts.headers + const body = typeof _data === 'function' + ? _data({ ...opts, headers: optsHeaders }) + : _data + + // util.types.isPromise is likely needed for jest. + if (isPromise(body)) { + // If handleReply is asynchronous, throwing an error + // in the callback will reject the promise, rather than + // synchronously throw the error, which breaks some tests. + // Rather, we wait for the callback to resolve if it is a + // promise, and then re-run handleReply with the new body. + body.then((newData) => handleReply(mockDispatches, newData)) + return + } + + const responseData = getResponseData(body) + const responseHeaders = generateKeyValues(headers) + const responseTrailers = generateKeyValues(trailers) + + handler.abort = nop + handler.onHeaders(statusCode, responseHeaders, resume, getStatusText(statusCode)) + handler.onData(Buffer.from(responseData)) + handler.onComplete(responseTrailers) + deleteMockDispatch(mockDispatches, key) + } + + function resume () {} + + return true +} + +function buildMockDispatch () { + const agent = this[kMockAgent] + const origin = this[kOrigin] + const originalDispatch = this[kOriginalDispatch] + + return function dispatch (opts, handler) { + if (agent.isMockActive) { + try { + mockDispatch.call(this, opts, handler) + } catch (error) { + if (error instanceof MockNotMatchedError) { + const netConnect = agent[kGetNetConnect]() + if (netConnect === false) { + throw new MockNotMatchedError(`${error.message}: subsequent request to origin ${origin} was not allowed (net.connect disabled)`) + } + if (checkNetConnect(netConnect, origin)) { + originalDispatch.call(this, opts, handler) + } else { + throw new MockNotMatchedError(`${error.message}: subsequent request to origin ${origin} was not allowed (net.connect is not enabled for this origin)`) + } + } else { + throw error + } + } + } else { + originalDispatch.call(this, opts, handler) + } + } +} + +function checkNetConnect (netConnect, origin) { + const url = new URL(origin) + if (netConnect === true) { + return true + } else if (Array.isArray(netConnect) && netConnect.some((matcher) => matchValue(matcher, url.host))) { + return true + } + return false +} + +function buildMockOptions (opts) { + if (opts) { + const { agent, ...mockOptions } = opts + return mockOptions + } +} + +module.exports = { + getResponseData, + getMockDispatch, + addMockDispatch, + deleteMockDispatch, + buildKey, + generateKeyValues, + matchValue, + getResponse, + getStatusText, + mockDispatch, + buildMockDispatch, + checkNetConnect, + buildMockOptions, + getHeaderByName +} |