Enable testing with MySQL and Postgres on Travis-CI

Fix Nitrate#169

Signed-off-by: Mr. Senko <atodorov@mrsenko.com>

.travis.yml

@@ -1,8 +1,20 @@
 language: python
 python:
   - "2.7"
+env:
+  - TEST_DB=SQLite
+  - TEST_DB=MySQL
+  - TEST_DB=Postgres
+services:
+  - mysql
+  - postgresql
+addons:
+  - postgresql: '9.5'
 before_install:
-  - pip install coveralls
+  - mysql -e 'SELECT VERSION();'
+  - mysql -e 'CREATE DATABASE nitrate_travis CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;'
+  - psql -c  "CREATE DATABASE nitrate_travis ENCODING 'UTF8' LC_COLLATE = 'en_US.UTF-8' LC_CTYPE = 'en_US.UTF-8';" -U postgres
+  - pip install coveralls psycopg2
 install: "pip install -r requirements/devel.txt"
 script: make check
 after_success:

tcms/settings/test.py

@@ -1,16 +1,33 @@
+import os
 from tcms.settings.devel import *
 
 DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.sqlite3',
-        'NAME': '',
+        'NAME': ':memory:',
         'USER': '',
         'PASSWORD': '',
         'HOST': '',
         'PORT': '',
     }
 }
 
+if 'TRAVIS' in os.environ:
+    if os.environ.get('TEST_DB').lower() in ['mysql', 'mariadb']:
+        DATABASES['default'].update({
+            'ENGINE': 'django.db.backends.mysql',
+            'NAME': 'nitrate_travis',
+            'USER': 'travis',
+            'HOST': '127.0.0.1',
+        })
+    elif os.environ.get('TEST_DB').lower() == 'postgres':
+        DATABASES['default'].update({
+            'ENGINE': 'django.db.backends.postgresql_psycopg2',
+            'NAME': 'nitrate_travis',
+            'USER': 'postgres',
+            'HOST': 'localhost',
+        })
+
 LISTENING_MODEL_SIGNAL = False
 
 LOGGING = {