Added Ruby to Travis testing.

- Added RVM-based Ruby test driver that tests MRI and JRuby.
- Fixed JRuby compilation (at least in my current setup): force source
  version to 1.6 (Java 6) to allow generics and annotations.
- Modify the skipped JRuby JSON tests so that the exit code is 0 (skip()
  results in a failing exit code from `rake test`). An upcoming PR
  should fix JSON under JRuby in general soon.

1 files changed, 19 insertions, 0 deletions

diff --git a/ruby/travis-test.sh b/ruby/travis-test.sh
new file mode 100755
index 00000000..2ccb490a
--- /dev/null
+++ b/ruby/travis-test.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Exit on any error.
+set -e
+
+test_version() {
+  version=$1
+  bash --login -c \
+    "rvm install $version && rvm use $version && \
+     which ruby && \
+     gem install bundler && bundle && \
+     rake test"
+}
+
+test_version ruby-1.9
+test_version ruby-2.0
+test_version ruby-2.1
+test_version ruby-2.2
+test_version jruby