Attempt to re-enable travis testing

Author: kasbah

.travis.yml

@@ -7,8 +7,15 @@ matrix:
   include:
   - node_js: node
     env: TEST_BROWSERS=true
+before_install:
+  - cd travis
+  - wget --no-check-certificate https://www.antlr.org/download/antlr-4.7.1-complete.jar
+  - export CLASSPATH=".:$TRAVIS_BUILD_DIR/travis/antlr-4.7.1-complete.jar:$CLASSPATH"
+  - export PATH=$PATH:$TRAVIS_BUILD_DIR/travis
+  - cd ..
 script:
+  - make
+  - cd js
+  - yarn
   - yarn test
-  - yarn demo
-  - git diff --quiet
-  - if [ "${TEST_BROWSERS}" = "true" ] && [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then yarn test:sauce; fi
+  - if [ "${TEST_BROWSERS}" = "true" ] && [ "${TRAVIS_BRANCH}" = "master" ]; then yarn test:sauce; fi

travis/antlr4

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+java -jar "$TRAVIS_BUILD_DIR/travis/antlr-4.7.1-complete.jar" $@