tests: create __reana db schema in app fixture

partially addresses reanahub/reana#348

AUTHORS.rst

@@ -6,5 +6,6 @@ The list of contributors in alphabetical order:
 - `Diego Rodriguez <https://orcid.org/0000-0003-0649-2002>`_
 - `Dinos Kousidis <https://orcid.org/0000-0002-4914-4289>`_
 - `Jan Okraska <https://orcid.org/0000-0002-1416-3244>`_
+- `Marco Vidal <https://orcid.org/0000-0002-9363-4971>`_
 - `Rokas Maciulaitis <https://orcid.org/0000-0003-1064-6967>`_
 - `Tibor Simko <https://orcid.org/0000-0001-7202-5803>`_

CHANGES.rst

@@ -6,6 +6,7 @@ Version master (UNRELEASED)
 
 - Fixes `bug related to duplicated database session <https://github.com/reanahub/pytest-reana/issues/33>`_.
 - Add Black formatter support.
+- Create ``__reana`` database schema for ``db`` fixture.
 
 Version 0.6.0 (2019-12-19)
 --------------------------

pytest_reana/fixtures.py

@@ -18,14 +18,14 @@
 
 import pkg_resources
 import pytest
-from kombu import Connection, Exchange, Producer, Queue
+from kombu import Connection, Exchange, Queue
 from kubernetes import client
-from mock import ANY, Mock, patch
+from mock import Mock, patch
 from reana_commons.consumer import BaseConsumer
 from reana_db.models import Base, User, Workflow
 from sqlalchemy import create_engine
-from sqlalchemy.orm import scoped_session, sessionmaker
-from sqlalchemy_utils import create_database, database_exists, drop_database
+from sqlalchemy.schema import CreateSchema
+from sqlalchemy_utils import create_database, database_exists
 
 
 @pytest.yield_fixture(scope="module")
@@ -98,14 +98,19 @@ def create_ninja_turtle()
                 assert res.status_code == 200
 
     """
+    from reana_db.database import Session
+
     engine = create_engine(base_app.config["SQLALCHEMY_DATABASE_URI"])
     base_app.session.bind = engine
     with base_app.app_context():
+        if not engine.dialect.has_schema(engine, "__reana"):
+            engine.execute(CreateSchema("__reana"))
         if not database_exists(engine.url):
             create_database(engine.url)
         Base.metadata.create_all(bind=engine)
         yield base_app
-        drop_database(engine.url)
+        Session.close()  # close hanging connections
+        Base.metadata.drop_all(bind=engine)
 
 
 @pytest.fixture()

setup.py

@@ -46,7 +46,7 @@
     'pydocstyle==3.0.0 ; python_version=="2.7"',
     "pytest-cache>=1.0,<2.0",
     "pytest-cov>=2.8.0,<3.0",
-    "pytest>=3.8.0,<5.0.0",
+    "pytest>=4.6.0,<5.0.0",
     "reana-commons[kubernetes]>=0.7.0.dev20200203",
     "reana-db>=0.7.0.dev20200206",
     "swagger_spec_validator>=2.1.0,<3.0",