tests(smoke): add smoke test code coverage (#4967)

.travis.yml

@@ -37,7 +37,7 @@ script:
   - yarn type-check
   - yarn closure
   - yarn diff:sample-json
-  - yarn smoke
+  - yarn smoke:silentcoverage
   - yarn test-extension
   # _JAVA_OPTIONS is breaking parsing of compiler output. See #3338.
   - unset _JAVA_OPTIONS
@@ -49,5 +49,6 @@ before_cache:
   - rm -rf ./node_modules/temp-devtoolsprotocol/
 after_success:
   - yarn coveralls
+  - yarn codecov
 addons:
   chrome: stable

lighthouse-core/gather/gatherers/dobetterweb/js-libraries.js

@@ -22,8 +22,8 @@ const libDetectorSource = fs.readFileSync(
  * Obtains a list of detected JS libraries and their versions.
  * @return {!Array<!{name: string, version: string, npmPkgName: string}>}
  */
-/* istanbul ignore next */
 /* eslint-disable camelcase */
+/* istanbul ignore next */
 function detectLibraries() {
   const libraries = [];
 

lighthouse-core/gather/gatherers/dobetterweb/tags-blocking-first-paint.js

@@ -23,6 +23,7 @@ const Gatherer = require('../gatherer');
 
 /* global document,window,HTMLLinkElement */
 
+/* istanbul ignore next */
 function installMediaListener() {
   window.___linkMediaChanges = [];
   Object.defineProperty(HTMLLinkElement.prototype, 'media', {

lighthouse-core/gather/gatherers/seo/robots-txt.js

@@ -9,6 +9,7 @@ const Gatherer = require('../gatherer');
 
 /* global fetch, URL, location */
 
+/* istanbul ignore next */
 function getRobotsTxtContent() {
   return fetch(new URL('/robots.txt', location.href))
     .then(response => {

lighthouse-core/lib/dom-helpers.js

@@ -19,6 +19,7 @@
  *     Combinators are not supported.
  * @param {!Array<!Element>}
  */
+/* istanbul ignore next */
 function getElementsInDocument(selector) {
   const results = [];
 

package.json

@@ -40,9 +40,12 @@
     "viewer-unit": "yarn unit-viewer",
     "watch": "yarn unit-core --watch",
 
-    "unit:silentcoverage": "nyc --silent yarn unit",
+    "unit:silentcoverage": "nyc --silent yarn unit && nyc report --reporter text-lcov > unit-coverage.lcov",
     "coverage": "nyc yarn unit && nyc report --reporter html",
-    "coveralls": "nyc report --reporter lcovonly && cat ./coverage/lcov.info | coveralls && codecov",
+    "smoke:silentcoverage": "nyc --silent yarn smoke && nyc report --reporter text-lcov > smoke-coverage.lcov",
+    "coverage:smoke": "nyc yarn smoke && nyc report --reporter html",
+    "coveralls": "cat unit-coverage.lcov | coveralls",
+    "codecov": "codecov -f unit-coverage.lcov -F unit && codecov -f smoke-coverage.lcov -F smoke",
 
     "closure": "cd lighthouse-core && node closure/closure-type-checking.js",
     "devtools": "bash lighthouse-core/scripts/roll-to-devtools.sh",