Add yapf test

Author: oschwald

.travis-pylint.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+python setup.py install
+pylint geoip2

.travis-yapf.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+diff=$(yapf -rd geoip2 tests)
+
+if [[ $? != 0 ]]; then
+    echo "yapf failed to run."
+    echo "$diff"
+    exit $?
+elif [[ $diff ]]; then
+    echo "$diff"
+    exit 1
+else
+    exit 0
+fi

.travis.yml

@@ -31,7 +31,8 @@ install:
   - "if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install ipaddr; fi"
 script:
   - coverage run --source=geoip2 setup.py test
-  - "if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pylint geoip2; fi"
+  - "if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then ./.travis-pylint.sh; fi"
+  - "if [[ $TRAVIS_PYTHON_VERSION == '3.6' ]]; then ./.travis-yapf.sh; fi"
 after_success:
   - coveralls
 notifications: