On Travis CI also run tests with PostgreSQL and MySQL

.travis.yml

@@ -6,9 +6,16 @@ before_install:
   - sudo apt-get update -qq
   - sudo apt-get install -y swig
   - pip install -r requirements.txt
+  - pip install psycopg2
 install:
   - pip install .
-script: py.test
+before_script:
+  - psql -c 'create database mutalyzer_test;' -U postgres
+  - mysql -e 'create database mutalyzer_test;'
+script:
+  - py.test
+  - MUTALYZER_TEST_DATABASE_URI=postgres://postgres@127.0.0.1/mutalyzer_test py.test
+  - MUTALYZER_TEST_DATABASE_URI=mysql://travis@127.0.0.1/mutalyzer_test?charset=utf8 py.test
 notifications:
   slack:
     secure: "VsB4CPZCfUPpnt7sL94mYrws2B9VthQhY1+u7NBm6QkAopel0m1rx1vWx3gQCTR0t9vWiP+pSybtQ81PQFNrOSWDsb1QlyEK1JF1QUw5Zui+5wS8fwFM/sgwGIECuo6Oj0zCwC9KMM4olYEMC2c7TNHv4HgwWiMqEK9ItEYSLQY="

doc/testing.rst

@@ -32,8 +32,8 @@ PostgreSQL::
     $ pg_virtualenv bash -c 'MUTALYZER_TEST_DATABASE_URI=postgres://${PGUSER}:${PGPASSWORD}@${PGHOST}:${PGPORT}/${PGDATABASE} py.test'
 
 Tests are `run automatically on Travis CI
-<https://travis-ci.org/LUMC/mutalyzer>`_ for each pull request and push on
-GitHub.
+<https://travis-ci.org/LUMC/mutalyzer>`_ with SQLite, PostgreSQL, and MySQL,
+for each pull request and push on GitHub.
 
 
 Testing the web services