Improve tests (#93)

* Travis: use "make test"

* Travis: do not start Xvfb

* Makefile: make test fast, add test_slow

Author: blueyed

.travis.yml

@@ -14,7 +14,6 @@ branches:
 before_script:
   - pip install --user vim-vint
   - vim --version
-  - Xvfb :99 &
 script:
-  - VIMRUNNER_REUSE_SERVER=1 DISPLAY=:99 bundle exec rspec spec
+  - make test
   - vint **/*.vim

Makefile

@@ -1,8 +1,8 @@
 test:
-	VIMRUNNER_REUSE_SERVER=0 bundle exec rspec
-
-test_fast:
 	VIMRUNNER_REUSE_SERVER=1 xvfb-run bundle exec rspec
 
+test_slow:
+	VIMRUNNER_REUSE_SERVER=0 bundle exec rspec
+
 test_visible:
 	VIMRUNNER_REUSE_SERVER=1 bundle exec rspec