Add a stage which hopefully runs tests using PostgreSQL on Travis CI

Author: matthiask

.travis.yml

@@ -38,6 +38,10 @@ matrix:
       env: TOXENV=py37-djmaster
       dist: xenial
       sudo: true
+    - python: 3.6
+      env: TOXENV=postgresql
+      addons:
+        postgresql: "9.5"
     - env: TOXENV=flake8
     - env: TOXENV=isort
     - env: TOXENV=readme

tests/settings.py

@@ -84,11 +84,19 @@
     },
 }
 
-DATABASES = {
-    'default': {
-        'ENGINE': 'django.db.backends.sqlite3',
+if os.environ.get("DJANGO_DATABASE_ENGINE") == "postgresql":
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.postgresql',
+            'NAME': 'debug-toolbar',
+        }
+    }
+else:
+    DATABASES = {
+        'default': {
+            'ENGINE': 'django.db.backends.sqlite3',
+        }
     }
-}
 
 
 # Debug Toolbar configuration

tox.ini

@@ -4,6 +4,7 @@ envlist =
     py{34,35,36,37}-dj20
     py{35,36,37}-dj21
     py{35,36,37}-djmaster
+    postgresql,
     flake8,
     isort,
     readme
@@ -25,6 +26,22 @@ whitelist_externals = make
 pip_pre = True
 commands = make coverage TEST_ARGS='{posargs:tests}'
 
+[testenv:postgresql]
+deps =
+    Django>=2.1,<2.2
+    coverage
+    django_jinja
+    html5lib
+    psycopg2-binary
+    selenium<4.0
+    sqlparse
+setenv =
+    PYTHONPATH = {toxinidir}
+    DJANGO_DATABASE_ENGINE = postgresql
+whitelist_externals = make
+pip_pre = True
+commands = make coverage TEST_ARGS='{posargs:tests}'
+
 [testenv:flake8]
 basepython = python3
 commands = make flake8