ci - split integration tests into parallel firefox and chrome runs

.circleci/config.yml

@@ -15,12 +15,20 @@ workflows:
       - test-unit:
           requires:
             - prep-deps-npm
-      - test-integration-mascara:
+      - test-integration-mascara-chrome:
+          requires:
+            - prep-deps-npm
+            - prep-scss
+      - test-integration-mascara-firefox:
           requires:
             - prep-deps-npm
             - prep-deps-firefox
             - prep-scss
-      - test-integration-flat:
+      - test-integration-flat-chrome:
+          requires:
+            - prep-deps-npm
+            - prep-scss
+      - test-integration-flat-firefox:
           requires:
             - prep-deps-npm
             - prep-deps-firefox
@@ -99,7 +107,9 @@ jobs:
           name: test:coverage
           command: npm run test:coverage
 
-  test-integration-flat:
+  test-integration-flat-firefox:
+    environment:
+      browsers: ["Firefox"]
     docker:
       - image: circleci/node:8-browsers
     steps:
@@ -125,7 +135,28 @@ jobs:
           name: test:integration:flat
           command: npm run test:flat
 
-  test-integration-mascara:
+  test-integration-flat-chrome:
+    environment:
+      browsers: ["Chrome"]
+    docker:
+      - image: circleci/node:8-browsers
+    steps:
+      - checkout
+      - restore_cache:
+          key: dependency-cache-{{ checksum "package-lock.json" }}
+      - run:
+          name: Get Scss Cache key
+          # this allows us to checksum against a whole directory
+          command: find ui/app/css -type f -exec md5sum {} \; | sort -k 2 > scss_checksum
+      - restore_cache:
+          key: scss-cache-{{ checksum "scss_checksum" }}
+      - run:
+          name: test:integration:flat
+          command: npm run test:flat
+
+  test-integration-mascara-firefox:
+    environment:
+      browsers: ["Firefox"]
     docker:
       - image: circleci/node:8-browsers
     steps:
@@ -150,3 +181,22 @@ jobs:
       - run:
           name: test:integration:mascara
           command: npm run test:mascara
+
+  test-integration-mascara-chrome:
+    environment:
+      browsers: ["Chrome"]
+    docker:
+      - image: circleci/node:8-browsers
+    steps:
+      - checkout
+      - restore_cache:
+          key: dependency-cache-{{ checksum "package-lock.json" }}
+      - run:
+          name: Get Scss Cache key
+          # this allows us to checksum against a whole directory
+          command: find ui/app/css -type f -exec md5sum {} \; | sort -k 2 > scss_checksum
+      - restore_cache:
+          key: scss-cache-{{ checksum "scss_checksum" }}
+      - run:
+          name: test:integration:mascara
+          command: npm run test:mascara

test/base.conf.js

@@ -46,7 +46,9 @@ module.exports = function(config) {
 
     // start these browsers
     // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
-    browsers: ['Chrome', 'Firefox'],
+    browsers: process.env.browsers ?
+      JSON.parse(process.env.browsers)
+      : ['Chrome', 'Firefox'],
 
     // Continuous Integration mode
     // if true, Karma captures browsers, runs the tests and exits