Support for browsers to play video streams (#994)

* Installs libavcodec-extra package for Firefox images.

* Adds support for a PulseAudio virtual sink

* Implement a test to validate if images can play video

NodeBase/Dockerfile.txt

@@ -6,6 +6,7 @@ USER root
 RUN apt-get update -qqy \
   && apt-get -qqy install \
     xvfb \
+    pulseaudio \
   && rm -rf /var/lib/apt/lists/* /var/cache/apt/*
 
 #==============================

NodeBase/start-selenium-node.sh

@@ -7,6 +7,16 @@ if [ ! -e /opt/selenium/config.json ]; then
   exit 1
 fi
 
+# Start the pulseaudio server
+pulseaudio -D --exit-idle-time=-1
+
+# Load the virtual sink and set it as default
+pacmd load-module module-virtual-sink sink_name=v1
+pacmd set-default-sink v1
+
+# set the monitor of v1 sink to be the default source
+pacmd set-default-source v1.monitor
+
 # In the long term the idea is to remove $HUB_PORT_4444_TCP_ADDR and $HUB_PORT_4444_TCP_PORT and only work with
 # $HUB_HOST and $HUB_PORT
 if [ ! -z "$HUB_HOST" ]; then

NodeFirefox/Dockerfile.txt

@@ -6,7 +6,7 @@ USER root
 ARG FIREFOX_VERSION=latest
 RUN FIREFOX_DOWNLOAD_URL=$(if [ $FIREFOX_VERSION = "latest" ] || [ $FIREFOX_VERSION = "nightly-latest" ] || [ $FIREFOX_VERSION = "devedition-latest" ]; then echo "https://download.mozilla.org/?product=firefox-$FIREFOX_VERSION-ssl&os=linux64&lang=en-US"; else echo "https://download-installer.cdn.mozilla.net/pub/firefox/releases/$FIREFOX_VERSION/linux-x86_64/en-US/firefox-$FIREFOX_VERSION.tar.bz2"; fi) \
   && apt-get update -qqy \
-  && apt-get -qqy --no-install-recommends install firefox \
+  && apt-get -qqy --no-install-recommends install firefox libavcodec-extra \
   && rm -rf /var/lib/apt/lists/* /var/cache/apt/* \
   && wget --no-verbose -O /tmp/firefox.tar.bz2 $FIREFOX_DOWNLOAD_URL \
   && apt-get -y purge firefox \

tests/SeleniumTests/__init__.py

@@ -1,5 +1,8 @@
 import unittest
 from selenium import webdriver
+from selenium.webdriver.common.by import By
+from selenium.webdriver.support.ui import WebDriverWait
+from selenium.webdriver.support import expected_conditions as EC
 from selenium.webdriver.common.desired_capabilities import DesiredCapabilities
 
 
@@ -39,6 +42,20 @@ def test_visit_basic_auth_secured_page(self):
         page_message = driver.find_element_by_css_selector('.example p').text
         self.assertTrue(page_message == 'Congratulations! You must have the proper credentials.')
 
+    def test_play_video(self):
+        driver = self.driver
+        driver.get('https://hls-js.netlify.com/demo/')
+        wait = WebDriverWait(driver, 30)
+        video = wait.until(
+            EC.element_to_be_clickable((By.TAG_NAME, 'video'))
+        )
+        video.click()
+        wait.until(
+            lambda d: d.find_element_by_tag_name('video').get_property('currentTime')
+        )
+        paused = video.get_property('paused')
+        self.assertFalse(paused)
+
     def tearDown(self):
         self.driver.quit()