Add codecov.io and make general CircleCI Improvements (#4375)

.circleci/config.yml

@@ -13,8 +13,6 @@ jobs:
         type: string
       browser:
         type: string
-      always-pass:
-        type: boolean  
     executor: linux
     steps:
       - checkout
@@ -24,13 +22,18 @@ jobs:
           node-version: << parameters.node-version >>
       - node/install-packages:
           override-ci-command: npm install
-      - when: # Just to save time until caching saves the browser bin
+      - when:
           condition:
             equal: [ "FirefoxESR", <<parameters.browser>> ]
           steps:
             - browser-tools/install-firefox:
-                version: "78.11.0esr" #https://archive.mozilla.org/pub/firefox/releases/          
-      - when: # Just to save time until caching saves the browser bin
+                version: "91.2.0esr" #https://archive.mozilla.org/pub/firefox/releases/          
+      - when:
+          condition:
+            equal: [ "Firefox", <<parameters.browser>> ]
+          steps:
+            - browser-tools/install-firefox
+      - when:
           condition:
             equal: [ "ChromeHeadless", <<parameters.browser>> ]
           steps:
@@ -42,8 +45,15 @@ jobs:
             - ~/.npm
             - ~/.cache
             - node_modules
+      - when:
+          condition:
+            equal: [ "", <<parameters.browser>> ] #Only run linting when browsers are not running to save time
+          steps:
             - run: npm run lint
-      - run: npm run test:coverage -- --browsers=<<parameters.browser>> || <<parameters.always-pass>>
+      - when:
+          condition: << parameters.browser >> #Truthy evaluation to only run when browser is specified
+          steps:
+            - run: npm run test:coverage -- --browsers=<<parameters.browser>>
             - store_test_results:
                 path: dist/reports/tests/
             - store_artifacts:
@@ -52,37 +62,36 @@ workflows:
   matrix-tests:
     jobs:
       - test:
+          post-steps:
+            - run:
+                command:
+                  curl -Os https://uploader.codecov.io/latest/linux/codecov;chmod +x codecov;./codecov              
           name: node10-chrome
           node-version: lts/dubnium
           browser: ChromeHeadless
-          always-pass: false
       - test:
-          name: node12-firefoxESR-build-only
+          name: node12-build-only
           node-version: lts/erbium
-          browser: FirefoxESR
-          always-pass: true
+          browser: "" #Skip testing
       - test: 
-          name: node14-chrome-build-only
+          name: node14-build-only
           node-version: lts/fermium
-          browser: ChromeHeadless
-          always-pass: true
+          browser: "" #Skip testing
+
   nightly:
     jobs:
       - test:
           name: node10-chrome-nightly
           node-version: lts/dubnium
           browser: ChromeHeadless
-          always-pass: false
       - test:
           name: node12-firefoxESR-nightly
           node-version: lts/erbium
           browser: FirefoxESR
-          always-pass: false
       - test:
-          name: node14-chrome-nightly
+          name: node14-firefox-nightly
           node-version: lts/fermium
-          browser: ChromeHeadless
-          always-pass: false
+          browser: Firefox
     triggers:
       - schedule:
           cron: "0 0 * * *"

.gitignore

@@ -44,3 +44,6 @@ report.*.json
 .lighthouseci
 
 package-lock.json
+
+#codecov artifacts
+codecov

codecov.yml

@@ -0,0 +1,20 @@
+codecov:
+  require_ci_to_pass: false
+
+coverage:
+  precision: 2
+  round: down
+  range: "70...100"
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "reach,diff,flags,files,footer"
+  behavior: default
+  require_changes: false