@onflow/flow-js-testing
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This package will expose a set of utility methods, to allow Cadence code testing with libraries like Jest
800 lines (786 loc) • 34.8 kB
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<h1><a href="../../index.html">All files</a> / <a href="index.html">src/emulator</a> emulator.js</h1>
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<div class='fl pad1y space-right2'>
<span class="strong">72.36% </span>
<span class="quiet">Statements</span>
<span class='fraction'>55/76</span>
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<span class="strong">53.84% </span>
<span class="quiet">Branches</span>
<span class='fraction'>21/39</span>
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<div class='fl pad1y space-right2'>
<span class="strong">58.82% </span>
<span class="quiet">Functions</span>
<span class='fraction'>10/17</span>
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<div class='fl pad1y space-right2'>
<span class="strong">75% </span>
<span class="quiet">Lines</span>
<span class='fraction'>54/72</span>
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Press <em>n</em> or <em>j</em> to go to the next uncovered block, <em>b</em>, <em>p</em> or <em>k</em> for the previous block.
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/*
* Flow JS Testing
*
* Copyright 2020-2021 Dapper Labs, Inc.
*
* 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 {send, build, getBlock, decode, config} from "@onflow/fcl"
import {Logger, LOGGER_LEVELS} from "./logger"
import {getAvailablePorts, getFlowVersion} from "../utils"
import {satisfies} from "semver"
const {spawn} = require("child_process")
const SUPPORTED_FLOW_CLI_VERSIONS = ">=2.0.0"
const SUPPORTED_PRE_RELEASE_MATCHER = "cadence-v1.0.0-preview"
const DEFAULT_HTTP_PORT = 8080
const DEFAULT_GRPC_PORT = 3569
const print = {
log: console.log,
service: console.log,
info: console.log,
error: console.error,
warn: console.warn,
}
/** Class representing emulator */
export class Emulator {
/**
* Create an emulator.
*/
constructor() {
this.initialized = false
this.logging = false
this.filters = []
this.logger = new Logger()
this.execName = "flow"
}
/**
* Set logging flag.
* @param {boolean} logging - whether logs shall be printed
*/
setLogging(logging) {
this.logging = logging
}
/**
* Log message with a specific type.
* @param {*} message - message to put into log output
* @param {"log"|"error"} type - type of the message to output
*/
<span class="fstat-no" title="function not covered" > lo</span>g(message, type = <span class="branch-0 cbranch-no" title="branch not covered" >"log")</span> {
<span class="cstat-no" title="statement not covered" > if (this.logging !== false) {</span>
<span class="cstat-no" title="statement not covered" > print[type](message)</span>
}
}
/**
* Start emulator.
* @param {Object} options - Optional parameters to start emulator with
* @param {string} [options.flags] - Extra flags to supply to emulator
* @param {boolean} [options.logging] - Switch to enable/disable logging by default
* @param {number} [options.grpcPort] - Hardcoded GRPC port
* @param {number} [options.restPort] - Hardcoded REST/HTTP port
* @param {number} [options.adminPort] - Hardcoded admin port
* @param {number} [options.debuggerPort] - Hardcoded debug port
* @param {string} [options.execName] - Name of executable for flow-cli
* @returns Promise<*>
*/
async start(options = {}) {
const {flags, logging = false, signatureCheck = false, execName} = options
<span class="missing-if-branch" title="if path not taken" >I</span>if (execName) <span class="cstat-no" title="statement not covered" >this.execName = execName</span>
// Get version of CLI
const flowVersion = await getFlowVersion(this.execName)
const satisfiesVersion = satisfies(
flowVersion.raw,
SUPPORTED_FLOW_CLI_VERSIONS,
{
includePrerelease: true,
}
)
const satisfiesPreRelease = flowVersion.raw.includes(
SUPPORTED_PRE_RELEASE_MATCHER
)
<span class="missing-if-branch" title="if path not taken" >I</span>if (!satisfiesVersion && <span class="branch-1 cbranch-no" title="branch not covered" >!satisfiesPreRelease)</span> {
<span class="cstat-no" title="statement not covered" > throw new Error(</span>
`Unsupported Flow CLI version: ${flowVersion.raw}. Supported versions: ${SUPPORTED_FLOW_CLI_VERSIONS} or pre-releases tagged with ${SUPPORTED_PRE_RELEASE_MATCHER}`
)
}
// populate emulator ports with available ports
const ports = await getAvailablePorts(4)
const [grpcPort, restPort, adminPort, debuggerPort] = ports
// override ports if specified in options
this.grpcPort = options.grpcPort || grpcPort
this.restPort = options.restPort || restPort
this.adminPort = options.adminPort || adminPort
this.debuggerPort = options.debuggerPort || debuggerPort
// Support deprecated start call using static port
<span class="missing-if-branch" title="if path not taken" >I</span>if (arguments.length > 1 || typeof arguments[0] === "number") {
<span class="cstat-no" title="statement not covered" > console.warn(`Calling emulator.start with the port argument is now deprecated in favour of dynamically selected ports and will be removed in future versions of flow-js-testing.</span>
Please refrain from supplying this argument, as using it may cause unintended consequences.
More info: https://github.com/onflow/flow-js-testing/blob/master/TRANSITIONS.md#0001-deprecate-emulatorstart-port-argument`)
;<span class="cstat-no" title="statement not covered" >[this.adminPort, options = <span class="branch-0 cbranch-no" title="branch not covered" >{}]</span> = arguments</span>
const offset = <span class="cstat-no" title="statement not covered" >this.adminPort - DEFAULT_HTTP_PORT</span>
<span class="cstat-no" title="statement not covered" > this.grpcPort = DEFAULT_GRPC_PORT + offset</span>
}
// config access node
config().put("accessNode.api", `http://localhost:${this.restPort}`)
this.logging = logging
this.process = spawn(this.execName, [
"emulator",
"--verbose",
`--log-format=JSON`,
`--rest-port=${this.restPort}`,
`--admin-port=${this.adminPort}`,
`--port=${this.grpcPort}`,
`--debugger-port=${this.debuggerPort}`,
`--skip-version-check`,
signatureCheck ? <span class="branch-0 cbranch-no" title="branch not covered" >"" </span>: "--skip-tx-validation",
flags,
])
this.logger.setProcess(this.process)
// Listen to logger to display logs if enabled
this.logger.on("*", <span class="fstat-no" title="function not covered" >(l</span>evel, msg) => {
<span class="cstat-no" title="statement not covered" > if (!this.filters.includes(level)) <span class="cstat-no" title="statement not covered" >return</span></span>
<span class="cstat-no" title="statement not covered" > this.log(`${level.toUpperCase()}: ${msg}`)</span>
<span class="cstat-no" title="statement not covered" > if (msg.includes("Starting") && msg.includes(this.adminPort)) {</span>
<span class="cstat-no" title="statement not covered" > this.log("EMULATOR IS UP! Listening for events!")</span>
}
})
// Suppress logger warning while waiting for emulator
await config().put("logger.level", 0)
return new Promise((resolve, reject) => {
const cleanup = success => {
this.initialized = success
this.logger.removeListener(LOGGER_LEVELS.ERROR, listener)
clearInterval(internalId)
if (success) resolve(true)
else reject()
}
let internalId
const checkLiveness = async function () {
try {
await send(build([getBlock(false)])).then(decode)
// Enable logger after emulator has come online
await config().put("logger.level", 2)
cleanup(true)
} catch (err) {} // eslint-disable-line no-unused-vars, no-empty
}
internalId = setInterval(checkLiveness, 100)
const listener = <span class="fstat-no" title="function not covered" >ms</span>g => {
<span class="cstat-no" title="statement not covered" > this.log(`EMULATOR ERROR: ${msg}`, "error")</span>
<span class="cstat-no" title="statement not covered" > cleanup(false)</span>
}
this.logger.on(LOGGER_LEVELS.ERROR, listener)
this.process.on("close", code => {
<span class="missing-if-branch" title="if path not taken" >I</span>if (this.filters.includes("service")) {
<span class="cstat-no" title="statement not covered" > this.log(`EMULATOR: process exited with code ${code}`)</span>
}
cleanup(false)
})
})
}
/**
* Clear all log filters.
* @returns void
**/
<span class="fstat-no" title="function not covered" > cl</span>earFilters() {
<span class="cstat-no" title="statement not covered" > this.filters = []</span>
}
/**
* Remove specific type of log filter.
* @param {(debug|info|warning)} type - type of message
* @returns void
**/
<span class="fstat-no" title="function not covered" > re</span>moveFilter(type) {
<span class="cstat-no" title="statement not covered" > this.filters = this.filters.filter(<span class="fstat-no" title="function not covered" >it</span>em => <span class="cstat-no" title="statement not covered" >item !== type)</span></span>
}
/**
* Add log filter.
* @param {(debug|info|warning)} type type - type of message
* @returns void
**/
<span class="fstat-no" title="function not covered" > ad</span>dFilter(type) {
<span class="cstat-no" title="statement not covered" > if (!this.filters.includes(type)) {</span>
<span class="cstat-no" title="statement not covered" > this.filters.push(type)</span>
}
}
/**
* Stop emulator.
* @returns Promise<*>
*/
async stop() {
// eslint-disable-next-line no-undef
return new Promise(resolve => {
this.process.kill()
setTimeout(() => {
this.initialized = false
resolve(false)
}, 50)
})
}
}
/** Singleton instance */
export default new Emulator()
</pre></td></tr></table></pre>
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