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resstream.test.js
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resstream.test.js
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const _ = require('lodash')
const test = require('ava')
const path = require('path')
const async = require('async')
const grpc = require('@grpc/grpc-js')
const protoLoader = require('@grpc/proto-loader')
const caller = require('../')
const PROTO_PATH = path.resolve(__dirname, './protos/resstream.proto')
const packageDefinition = protoLoader.loadSync(PROTO_PATH)
const argProto = grpc.loadPackageDefinition(packageDefinition).argservice
const apps = []
const data = [
{ message: '1 foo' },
{ message: '2 bar' },
{ message: '3 asd' },
{ message: '4 qwe' },
{ message: '5 rty' },
{ message: '6 zxc' }
]
function getRandomInt (min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min
}
function getHost (port) {
return '0.0.0.0:'.concat(port || getRandomInt(1000, 60000))
}
const DYNAMIC_HOST = getHost()
const client = caller(DYNAMIC_HOST, PROTO_PATH, 'ArgService')
test.before('should dynamically create service', t => {
function listStuff (call) {
const reqMsg = call.request.message
let meta = null
if (call.metadata) {
const reqMeta = call.metadata.getMap()
if (reqMeta['user-agent']) {
delete reqMeta['user-agent']
}
if (!_.isEmpty(reqMeta)) {
meta = JSON.stringify(reqMeta)
}
}
async.eachSeries(
data,
(d, asfn) => {
const ret = { message: d.message + ':' + reqMsg }
if (meta) {
ret.metadata = meta
}
call.write(ret)
_.delay(asfn, _.random(50, 150))
},
() => {
call.end()
}
)
}
const server = new grpc.Server()
server.addService(argProto.ArgService.service, { listStuff })
server.bindAsync(DYNAMIC_HOST, grpc.ServerCredentials.createInsecure(), err => {
t.falsy(err)
server.start()
apps.push(server)
})
})
test.cb('res stream call service using just an argument', t => {
t.plan(1)
let resData = []
const call = client.listStuff({ message: 'Hello' })
call.on('data', d => resData.push(d))
call.on('end', () => {
resData = _.sortBy(resData, 'message')
let expected = _.cloneDeep(data)
expected = _.map(expected, d => {
return { message: d.message + ':Hello' }
})
t.deepEqual(resData, expected)
t.end()
})
})
test.cb('call service with metadata as plain object', t => {
t.plan(1)
let resData = []
const ts = new Date().getTime()
const call = client.listStuff({ message: 'Hi' }, { requestId: 'bar-123', timestamp: ts })
call.on('data', d => {
const metadata = d.metadata ? JSON.parse(d.metadata) : ''
resData.push({ message: d.message, metadata })
})
call.on('end', () => {
resData = _.sortBy(resData, 'message')
let expected = _.cloneDeep(data)
expected = _.map(expected, d => {
d.message = d.message + ':Hi'
d.metadata = { requestid: 'bar-123', timestamp: ts.toString() }
return d
})
t.deepEqual(resData, expected)
t.end()
})
})
test.cb('call service with metadata as Metadata', t => {
t.plan(1)
const ts = new Date().getTime().toString()
const reqMeta = new grpc.Metadata()
reqMeta.add('requestId', 'bar-123')
reqMeta.add('timestamp', ts)
let resData = []
const call = client.listStuff({ message: 'Yo' }, reqMeta)
call.on('data', d => {
const metadata = d.metadata ? JSON.parse(d.metadata) : ''
resData.push({ message: d.message, metadata })
})
call.on('end', () => {
resData = _.sortBy(resData, 'message')
let expected = _.cloneDeep(data)
expected = _.map(expected, d => {
d.message = d.message + ':Yo'
d.metadata = { requestid: 'bar-123', timestamp: ts }
return d
})
t.deepEqual(resData, expected)
t.end()
})
})
test.cb('call service with metadata as plain object and options object', t => {
t.plan(1)
let resData = []
const ts = new Date().getTime()
const call = client.listStuff(
{ message: 'Hello' },
{ requestId: 'bar-123', timestamp: ts },
{ some: 'blah' }
)
call.on('data', d => {
const metadata = d.metadata ? JSON.parse(d.metadata) : ''
resData.push({ message: d.message, metadata })
})
call.on('end', () => {
resData = _.sortBy(resData, 'message')
let expected = _.cloneDeep(data)
expected = _.map(expected, d => {
d.message = d.message + ':Hello'
d.metadata = { requestid: 'bar-123', timestamp: ts.toString() }
return d
})
t.deepEqual(resData, expected)
t.end()
})
})
test.cb('call service with metadata as Metadata and options object', t => {
t.plan(1)
let resData = []
const ts = new Date().getTime().toString()
const reqMeta = new grpc.Metadata()
reqMeta.add('requestId', 'bar-123')
reqMeta.add('timestamp', ts)
const call = client.listStuff({ message: 'Hello' }, reqMeta, { some: 'blah' })
call.on('data', d => {
const metadata = d.metadata ? JSON.parse(d.metadata) : ''
resData.push({ message: d.message, metadata })
})
call.on('end', () => {
resData = _.sortBy(resData, 'message')
let expected = _.cloneDeep(data)
expected = _.map(expected, d => {
d.message = d.message + ':Hello'
d.metadata = { requestid: 'bar-123', timestamp: ts }
return d
})
t.deepEqual(resData, expected)
t.end()
})
})
test('Request API: should fail due to unsupported call type', t => {
const error = t.throws(() => {
const req = new client.Request('listStuff', { message: 'Hello' })
req.exec()
})
t.truthy(error)
t.is(error.message, 'Invalid call: listStuff cannot be called using Request API')
})
test.after.always.cb('guaranteed cleanup', t => {
async.each(apps, (app, ascb) => app.tryShutdown(ascb), t.end)
})