Adding coverage

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
-.vscode/
+.vscode/
+coverage/

.travis.yml

@@ -7,4 +7,11 @@ install:
   - npm install
 
 script:
-  - npm test
+  - npm test
+
+branches:
+  only:
+    - master
+
+# Send coverage data to Coveralls
+after_script: "cat coverage/lcov.info | node_modules/coveralls/bin/coveralls.js"

package.json

@@ -9,6 +9,10 @@
     "test": "jest ."
   },
   "devDependencies": {
+    "coveralls": "^3.0.0",
     "jest": "^21.2.1"
+  },
+  "jest": {
+    "collectCoverage": true
   }
 }

yarn.lock

@@ -482,6 +482,16 @@ [email protected], core-util-is@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/core-util-is/-/core-util-is-1.0.2.tgz#b5fd54220aa2bc5ab57aab7140c940754503c1a7"
 
+coveralls@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/coveralls/-/coveralls-3.0.0.tgz#22ef730330538080d29b8c151dc9146afde88a99"
+  dependencies:
+    js-yaml "^3.6.1"
+    lcov-parse "^0.0.10"
+    log-driver "^1.2.5"
+    minimist "^1.2.0"
+    request "^2.79.0"
+
 cross-spawn@^5.0.1:
   version "5.1.0"
   resolved "https://registry.yarnpkg.com/cross-spawn/-/cross-spawn-5.1.0.tgz#e8bd0efee58fcff6f8f94510a0a554bbfa235449"
@@ -1377,7 +1387,7 @@ js-tokens@^3.0.0, js-tokens@^3.0.2:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-3.0.2.tgz#9866df395102130e38f7f996bceb65443209c25b"
 
-js-yaml@^3.7.0:
+js-yaml@^3.6.1, js-yaml@^3.7.0:
   version "3.10.0"
   resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.10.0.tgz#2e78441646bd4682e963f22b6e92823c309c62dc"
   dependencies:
@@ -1473,6 +1483,10 @@ lcid@^1.0.0:
   dependencies:
     invert-kv "^1.0.0"
 
+lcov-parse@^0.0.10:
+  version "0.0.10"
+  resolved "https://registry.yarnpkg.com/lcov-parse/-/lcov-parse-0.0.10.tgz#1b0b8ff9ac9c7889250582b70b71315d9da6d9a3"
+
 leven@^2.1.0:
   version "2.1.0"
   resolved "https://registry.yarnpkg.com/leven/-/leven-2.1.0.tgz#c2e7a9f772094dee9d34202ae8acce4687875580"
@@ -1514,6 +1528,10 @@ lodash@^4.14.0, lodash@^4.17.4:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"
 
+log-driver@^1.2.5:
+  version "1.2.5"
+  resolved "https://registry.yarnpkg.com/log-driver/-/log-driver-1.2.5.tgz#7ae4ec257302fd790d557cb10c97100d857b0056"
+
 longest@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/longest/-/longest-1.0.1.tgz#30a0b2da38f73770e8294a0d22e6625ed77d0097"