Use .env file for propagating environment variables to Docker Compose

Author: amotl

CHANGES.rst

@@ -6,6 +6,7 @@ grafana-wtf changelog
 in progress
 ===========
 - Upgrade to ``colored==1.4.3``
+- Tests: Use ``.env`` file for propagating environment variables to Docker Compose
 
 2021-10-01 0.10.0
 =================

tests/.env

@@ -0,0 +1 @@
+GRAFANA_VERSION=8.3.1

tests/conftest.py

@@ -13,19 +13,6 @@ def clean_environment():
             pass
 
 
-def update_environment():
-
-    # Set default Grafana version.
-    GRAFANA_VERSION_DEFAULT = "8.1.5"
-    if "GRAFANA_VERSION" not in os.environ:
-        os.environ["GRAFANA_VERSION"] = GRAFANA_VERSION_DEFAULT
-
-    # Report about Grafana version.
-    GRAFANA_VERSION = os.environ["GRAFANA_VERSION"]
-    sys.stderr.write(f"INFO: Running tests against Grafana version {GRAFANA_VERSION}\n")
-    sys.stderr.flush()
-
-
 @pytest.fixture(scope="session")
 def docker_compose_files(pytestconfig):
     """
@@ -51,4 +38,3 @@ def docker_grafana(docker_services):
 
 
 clean_environment()
-update_environment()

tests/docker-compose.yml

@@ -2,6 +2,7 @@ version: '3'
 services:
 
   grafana:
+    container_name: grafana-wtf-test
     image: grafana/grafana:${GRAFANA_VERSION}
     volumes:
       - ./grafana/datasources:/etc/grafana/provisioning/datasources/