test on mongo db versions (#17)

* add mongo versions to test
* add warning

.travis.yml

@@ -3,7 +3,18 @@ node_js:
   - 8
   - 6
   - 4
-services:
-  - mongodb
+env:
+  - MONGODB_VERSION="2.6.12"
+  - MONGODB_VERSION="3.0.15"
+  - MONGODB_VERSION="3.2.16"
+  - MONGODB_VERSION="3.4.7"
+
+before_script:
+  - wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-${MONGODB_VERSION}.tgz -O /tmp/mongodb.tgz
+  - tar -xvf /tmp/mongodb.tgz
+  - mkdir /tmp/data
+  - ${PWD}/mongodb-linux-x86_64-${MONGODB_VERSION}/bin/mongod --dbpath /tmp/data &> /dev/null &
+  - ${PWD}/mongodb-linux-x86_64-${MONGODB_VERSION}/bin/mongod --version
+  - until nc -z localhost 27017; do echo Waiting for MongoDB; sleep 1; done
 sudo: false
 after_success: "npm run coveralls"

README.md

@@ -1,10 +1,14 @@
-mongopatch [![Build Status](https://travis-ci.org/debitoor/mongopatch.svg?branch=master)](https://travis-ci.org/debitoor/mongopatch) [![Coverage Status](https://coveralls.io/repos/github/debitoor/mongopatch/badge.svg?branch=master)](https://coveralls.io/github/debitoor/mongopatch?branch=master) [![dependencies Status](https://david-dm.org/debitoor/mongopatch/status.svg)](https://david-dm.org/debitoor/mongopatch) [![devDependencies Status](https://david-dm.org/debitoor/mongopatch/dev-status.svg)](https://david-dm.org/debitoor/mongopatch?type=dev)
+mongopatch [![npm version](https://badge.fury.io/js/mongopatch.svg)](https://badge.fury.io/js/mongopatch) [![Build Status](https://travis-ci.org/debitoor/mongopatch.svg?branch=master)](https://travis-ci.org/debitoor/mongopatch) [![Coverage Status](https://coveralls.io/repos/github/debitoor/mongopatch/badge.svg?branch=master)](https://coveralls.io/github/debitoor/mongopatch?branch=master) [![dependencies Status](https://david-dm.org/debitoor/mongopatch/status.svg)](https://david-dm.org/debitoor/mongopatch) [![devDependencies Status](https://david-dm.org/debitoor/mongopatch/dev-status.svg)](https://david-dm.org/debitoor/mongopatch?type=dev)
 ===============================================================================================================================================================================================================================================================================================================================================================================================================================
 
 MongoDB patching tool. Update and log mongodb documents.
 
 	npm install -g mongopatch
 
+!!WARNING!!
+-----------
+
+Module has broken tests and probably functionality on MongoDB versions `2.6.*` and `3.4.*`. Versions `3.0.*` and `3.2.*` seems to be fine. See travis build for more details.
 
 Writing patches
 ---------------