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eventsource-stream-parse-line.js
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'use strict'
const assert = require('node:assert')
const { test, describe } = require('node:test')
const { EventSourceStream } = require('../../lib/web/eventsource/eventsource-stream')
describe('EventSourceStream - parseLine', () => {
const defaultEventSourceSettings = {
origin: 'example.com',
reconnectionTime: 1000
}
test('Should push an unmodified event when line is empty', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 0)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set the data field with empty string if not containing data', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('data:', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, '')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set the data field with empty string if not containing data (containing space after colon)', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('data: ', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, '')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set the data field with a string containing space if having more than one space after colon', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('data: ', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, ' ')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set value properly, even if the line contains multiple colons', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('data: : ', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, ': ')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set the data field when containing data', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('data: Hello', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, 'Hello')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should ignore comments', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from(':comment', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 0)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set retry field', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('retry: 1000', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, '1000')
})
test('Should set id field', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('id: 1234', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, '1234')
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('Should set id field', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('event: custom', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, 'custom')
assert.strictEqual(event.retry, undefined)
})
test('Should ignore invalid field', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
stream.parseLine(Buffer.from('comment: invalid', 'utf8'), event)
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 0)
assert.strictEqual(event.data, undefined)
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('bogus retry', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
'retry:3000\nretry:1000x\ndata:x'.split('\n').forEach((line) => {
stream.parseLine(Buffer.from(line, 'utf8'), event)
})
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 2)
assert.strictEqual(event.data, 'x')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, '3000')
})
test('bogus id', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
'id:3000\nid:30\x000\ndata:x'.split('\n').forEach((line) => {
stream.parseLine(Buffer.from(line, 'utf8'), event)
})
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 2)
assert.strictEqual(event.data, 'x')
assert.strictEqual(event.id, '3000')
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
test('empty event', () => {
const stream = new EventSourceStream({
eventSourceSettings: {
...defaultEventSourceSettings
}
})
const event = {}
'event: \ndata:data'.split('\n').forEach((line) => {
stream.parseLine(Buffer.from(line, 'utf8'), event)
})
assert.strictEqual(typeof event, 'object')
assert.strictEqual(Object.keys(event).length, 1)
assert.strictEqual(event.data, 'data')
assert.strictEqual(event.id, undefined)
assert.strictEqual(event.event, undefined)
assert.strictEqual(event.retry, undefined)
})
})