chore(build): use Chromium in Travis for JS tests

scripts/ci/install_chromium.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+set -e -x
+
+# This script basically follows the instructions to download an old version of Chromium: https://www.chromium.org/getting-involved/download-chromium
+# 1) It retrieves the current stable version number from https://www.chromium.org/developers/calendar (via the https://omahaproxy.appspot.com/all file), e.g. 359700 for Chromium 48.
+# 2) It checks the Travis cache for this specific version
+# 3) If not available, it downloads and caches it, using the "decrement commit number" trick.
+
+#Build version read from the OmahaProxy CSV Viewer at https://www.chromium.org/developers/calendar
+#Let's use Chromium 47 as the default (352221 build number), and try to grab the latest stable from https://omahaproxy.appspot.com/all
+CHROMIUM_VERSION=352221
+TMP=$(curl -s "https://omahaproxy.appspot.com/all") || true
+oldIFS="$IFS"
+IFS='
+'
+IFS=${IFS:0:1}
+lines=( $TMP )
+IFS=','
+for line in "${lines[@]}"
+  do
+    lineArray=($line);
+    if [ "${lineArray[0]}" = "linux" ] && [ "${lineArray[1]}" = "stable" ] ; then
+      CHROMIUM_VERSION="${lineArray[7]}"
+    fi
+done
+IFS="$oldIFS"
+
+CHROMIUM_DIR=$HOME/.chrome/chromium
+CHROMIUM_BIN=$CHROMIUM_DIR/chrome-linux/chrome
+CHROMIUM_VERSION_FILE=$CHROMIUM_DIR/VERSION
+
+EXISTING_VERSION=""
+if [[ -f $CHROMIUM_VERSION_FILE && -x $CHROMIUM_BIN ]]; then
+  EXISTING_VERSION=`cat $CHROMIUM_VERSION_FILE`
+  echo Found cached Chromium version: ${EXISTING_VERSION}
+fi
+
+if [[ "$EXISTING_VERSION" != "$CHROMIUM_VERSION" ]]; then
+  echo Downloading Chromium version: ${CHROMIUM_VERSION}
+  rm -fR $CHROMIUM_DIR
+  mkdir -p $CHROMIUM_DIR
+
+  NEXT=$CHROMIUM_VERSION
+  FILE="chrome-linux.zip"
+  STATUS=404
+  while [[ $STATUS == 404 && $NEXT -ge 0 ]]
+  do
+    echo Fetch Chromium version: ${NEXT}
+    STATUS=$(curl "https://storage.googleapis.com/chromium-browser-snapshots/Linux_x64/${NEXT}/chrome-linux.zip" -s -w %{http_code} --create-dirs -o $FILE) || true
+    NEXT=$[$NEXT-1]
+  done
+
+  unzip $FILE -d $CHROMIUM_DIR
+  rm $FILE
+  echo $CHROMIUM_VERSION > $CHROMIUM_VERSION_FILE
+fi
+
+

scripts/ci/test_dart.sh

@@ -7,6 +7,6 @@ SCRIPT_DIR=$(dirname $0)
 source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
-./node_modules/.bin/gulp test.dart --browsers=$KARMA_BROWSERS
+./node_modules/.bin/gulp test.dart --browsers=$KARMA_DART_BROWSERS
 ${SCRIPT_DIR}/test_server_dart.sh
 ${SCRIPT_DIR}/test_e2e_dart.sh

scripts/ci/test_js.sh

@@ -13,5 +13,5 @@ if  ${SCRIPT_DIR}/env_dart.sh 2>&1 > /dev/null ; then
 fi
 
 ./node_modules/.bin/gulp pre-test-checks
-./node_modules/.bin/gulp test.js --browsers=${KARMA_BROWSERS:-Chrome}
+./node_modules/.bin/gulp test.js --browsers=${KARMA_JS_BROWSERS:-Chrome}
 ${SCRIPT_DIR}/test_e2e_js.sh

scripts/ci/test_router.sh

@@ -7,4 +7,4 @@ SCRIPT_DIR=$(dirname $0)
 source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
-./node_modules/.bin/gulp test.unit.router/ci --browsers=${KARMA_BROWSERS:-Chrome}
+./node_modules/.bin/gulp test.unit.router/ci --browsers=${KARMA_JS_BROWSERS:-Chrome}

scripts/ci/test_server_dart.sh

@@ -35,4 +35,4 @@ trap killAllServers EXIT
 sleep 3
 
 ./node_modules/.bin/gulp test.transpiler.unittest
-./node_modules/.bin/gulp test.server.dart --browsers=$KARMA_BROWSERS
+./node_modules/.bin/gulp test.server.dart --browsers=$KARMA_DART_BROWSERS