Add unit tests (#68)

* initial tests and move around

* only build master branch

* support testing multiple versions of react in jest/enzyme

* add more tests, run multiple react versions in ci

* add more tests

* fix test with workaround

* add more proptype tests

* move danger to ci script

.travis.yml

@@ -1,10 +1,13 @@
 language: node_js
 node_js: "stable"
+branches:
+  only:
+    - master
 
 before_install:
   - "stty cols 80"
   - "export SAUCE_JOB=react-tether"
   - "export SAUCE_BUILD=$TRAVIS_COMMIT"
 
-before_script:
-  - npm run danger
+script:
+  - ./bin/test

bin/test

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+npm run danger
+
+npm run react:15
+npm run unit
+
+npm run react:16
+npm run unit
+
+if [ -z "$SAUCE_USERNAME" ] && [ -z "$SAUCE_ACCESS_KEY"]; then
+  echo
+  echo "ATTENTION"
+  echo "Skipping E2E tests because the environment variables are not set!"
+else
+  npm run e2e:full
+fi