.travis.yml in ransack-1.5.1 vs .travis.yml in ransack-1.6.0

@@ -1,32 +1,76 @@
+services: mongodb
+
 language: ruby
 
 sudo: false
 
 rvm:
+  - 2.2
   - 2.1
   - 2.0
   - 1.9
 
 env:
-  - RAILS=master DB=sqlite3
-  - RAILS=master DB=mysql
-  - RAILS=master DB=postgres
+  - RAILS=4-2-stable DB=mongodb
+  - RAILS=4-2-stable DB=sqlite3
+  - RAILS=4-2-stable DB=mysql
+  - RAILS=4-2-stable DB=postgres
+
+  - RAILS=4-1-stable DB=mongodb
   - RAILS=4-1-stable DB=sqlite3
   - RAILS=4-1-stable DB=mysql
   - RAILS=4-1-stable DB=postgres
+
   - RAILS=4-0-stable DB=sqlite3
   - RAILS=4-0-stable DB=mysql
   - RAILS=4-0-stable DB=postgres
+
   - RAILS=3-2-stable DB=sqlite
   - RAILS=3-2-stable DB=mysql
   - RAILS=3-2-stable DB=postgres
+
   - RAILS=3-1-stable DB=sqlite
   - RAILS=3-1-stable DB=mysql
   - RAILS=3-1-stable DB=postgres
+
   - RAILS=3-0-stable DB=sqlite
   - RAILS=3-0-stable DB=mysql
   - RAILS=3-0-stable DB=postgres
+
+matrix:
+  include:
+    - rvm: 2.2
+      env: RAILS=master DB=sqlite3
+    - rvm: 2.2
+      env: RAILS=master DB=mysql
+    - rvm: 2.2
+      env: RAILS=master DB=postgres
+  exclude:
+    - rvm: 2.2
+      env: RAILS=3-0-stable DB=sqlite
+    - rvm: 2.2
+      env: RAILS=3-0-stable DB=mysql
+    - rvm: 2.2
+      env: RAILS=3-0-stable DB=postgres
+
+  allow_failures:
+    - env: RAILS=master DB=sqlite3
+    - env: RAILS=master DB=mysql
+    - env: RAILS=master DB=postgres
+
+    - rvm: 2.2
+      env: RAILS=3-2-stable DB=sqlite
+    - rvm: 2.2
+      env: RAILS=3-2-stable DB=mysql
+    - rvm: 2.2
+      env: RAILS=3-2-stable DB=postgres
+    - rvm: 2.2
+      env: RAILS=3-1-stable DB=sqlite
+    - rvm: 2.2
+      env: RAILS=3-1-stable DB=mysql
+    - rvm: 2.2
+      env: RAILS=3-1-stable DB=postgres
 
 before_script:
   - mysql -e 'create database ransack collate utf8_general_ci;'
   - mysql -e 'use ransack;show variables like "%character%";show variables like "%collation%";'
   - psql -c 'create database ransack;' -U postgres