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index.test.js
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index.test.js
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'use strict'
/* global describe, after, it */
/**
* @typedef {object} MetaData Video stream meta data
* @property {number} duration Video duration
* @property {number} width Video width
* @property {number} height Video height
* @property {number} rotate Video rotation value
*/
/** @type {object} */
const assert = require('assert').strict
const fs = require('fs')
const execFile = require('util').promisify(require('child_process').execFile)
const recordScreen = require('.')
const mochaTimeout = 15000
const mochaSlow = 10000
const videoFile = '/tmp/test.mp4'
const recordingDuration = 2000
/**
* Checks the integrity of the given video file.
*
* @param {string} videoFile File path to the video file
* @returns {Promise} Resolves for a valid file, rejects otherwise
*/
function checkVideoIntegrity(videoFile) {
return execFile('ffmpeg', ['-v', 'error', '-i', videoFile, '-f', 'null', '-'])
}
/**
* Checks the integrity of the given video file.
*
* @param {string} videoFile File path to the video file
* @returns {Promise<MetaData>} Resolves with the video meta data
*/
async function getVideoMetaData(videoFile) {
const result = await execFile('ffprobe', [
'-v',
'error',
'-show_entries',
'format=duration:stream=width,height:stream_tags=rotate',
'-of',
'json',
videoFile
])
const parsedResult = JSON.parse(result.stdout)
const rotate = parsedResult.streams[0].tags.rotate
return {
duration: Number(parsedResult.format.duration),
width: parsedResult.streams[0].width,
height: parsedResult.streams[0].height,
rotate: rotate === undefined ? rotate : Number(rotate)
}
}
/**
* Starts a given main activity on the Android device.
*
* @param {...string} args Command line arguments
* @returns {Promise} Resolves if executed succesfully, rejects otherwise
*/
function startMainActivity(...args) {
return execFile(
'adb',
['shell', 'am', 'start', '-a', 'android.intent.action.MAIN'].concat(args)
).catch(error => console.error(error)) // eslint-disable-line no-console
}
/**
* Opens Chrome on the Android device.
*
* @returns {Promise} Resolves if executed succesfully, rejects otherwise
*/
function openChrome() {
return startMainActivity(
'-n',
'com.android.chrome/com.google.android.apps.chrome.Main'
)
}
/**
* Shows the home screen on the Android device.
*
* @returns {Promise} Resolves if executed succesfully, rejects otherwise
*/
function showHomeScreen() {
return startMainActivity('-c', 'android.intent.category.HOME')
}
describe('screen recording', function () {
this.timeout(mochaTimeout)
this.slow(mochaSlow)
after(function () {
fs.unlinkSync(videoFile)
})
it('uses default options', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb shell screenrecord --verbose /sdcard/Movies/video.mp4'
)
})
it('handles option: serial', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
serial: 'banana'
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb -s banana shell screenrecord --verbose /sdcard/Movies/video.mp4'
)
})
it('handles option: transportID', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
transportID: 'banana'
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb -t banana shell screenrecord --verbose /sdcard/Movies/video.mp4'
)
})
it('handles option: bugreport', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
bugreport: true
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb shell screenrecord --verbose --bugreport /sdcard/Movies/video.mp4'
)
})
it('handles option: size', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
size: '1x1'
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb shell screenrecord --verbose --size 1x1 /sdcard/Movies/video.mp4'
)
})
it('handles option: bitRate', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
bitRate: 400
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb shell screenrecord --verbose --bit-rate 400 /sdcard/Movies/video.mp4'
)
})
it('handles option: timeLimit', async function () {
const recording = recordScreen(videoFile, {
waitTimeout: 0,
timeLimit: 9
})
const cmd = await recording.promise.catch(error => error.cmd)
assert.strictEqual(
cmd.replace(/\w+\.mp4$/, 'video.mp4'),
'adb shell screenrecord --verbose --time-limit 9 /sdcard/Movies/video.mp4'
)
})
it('records screen', async function () {
// Touch the file name to check if it can override existing files:
fs.closeSync(fs.openSync(videoFile, 'w'))
const recording = recordScreen(videoFile, {
hostname: process.env.ANDROID_HOST
})
// Start some activities, as without screen changes the video will be empty:
setTimeout(openChrome, recordingDuration / 4)
setTimeout(showHomeScreen, recordingDuration / 2)
setTimeout(() => recording.stop(), recordingDuration + 500)
const result = await recording.promise
assert.strictEqual(result.stderr, '')
const lines = result.stdout.split('\n')
assert.ok(
lines[0].indexOf(process.env.ANDROID_HOST) !== -1,
'stdout starts with connect output'
)
const intent = 'android.intent.action.MEDIA_SCANNER_SCAN_FILE'
assert.ok(
result.stdout.indexOf(intent) !== -1,
'stdout contains broadcasted intent'
)
await checkVideoIntegrity(videoFile)
const metaData = await getVideoMetaData(videoFile)
const expectedDuration = recordingDuration / 1000
if (!(metaData.duration >= expectedDuration)) {
throw new assert.AssertionError({
message: 'Recording does not have the expected length.',
actual: metaData.duration,
expected: expectedDuration,
operator: '>='
})
}
if (!(metaData.width >= 320)) {
throw new assert.AssertionError({
message: 'Recording does not have the expected resolution width.',
actual: metaData.width,
expected: 320,
operator: '>='
})
}
if (!(metaData.width >= 480)) {
throw new assert.AssertionError({
message: 'Recording does not have the expected resolution height.',
actual: metaData.width,
expected: 480,
operator: '>='
})
}
})
})