adding support for passing env-file to DockerCompose (testcontainers#134)

Author: Anton Petrosyuk

testcontainers/compose.py

@@ -5,9 +5,8 @@
 Allows to spin up services configured via :code:`docker-compose.yml`.
 """
 
-import subprocess
-
 import requests
+import subprocess
 
 from testcontainers.core.waiting_utils import wait_container_is_ready
 from testcontainers.core.exceptions import NoSuchPortExposed
@@ -55,16 +54,19 @@ class DockerCompose(object):
         expose:
             - "5555"
     """
+
     def __init__(
             self,
             filepath,
             compose_file_name="docker-compose.yml",
-            pull=False):
+            pull=False,
+            env_file=None):
         self.filepath = filepath
         self.compose_file_names = compose_file_name if isinstance(
             compose_file_name, (list, tuple)
         ) else [compose_file_name]
         self.pull = pull
+        self.env_file = env_file
 
     def __enter__(self):
         self.start()
@@ -77,12 +79,15 @@ def docker_compose_command(self):
         docker_compose_cmd = ['docker-compose']
         for file in self.compose_file_names:
             docker_compose_cmd += ['-f', file]
+        if self.env_file:
+            docker_compose_cmd += ['--env-file', self.env_file]
         return docker_compose_cmd
 
     def start(self):
         if self.pull:
             pull_cmd = self.docker_compose_command() + ['pull']
             subprocess.call(pull_cmd, cwd=self.filepath)
+
         up_cmd = self.docker_compose_command() + ['up', '-d']
         subprocess.call(up_cmd, cwd=self.filepath)
 

tests/test_docker_compose.py

@@ -1,12 +1,13 @@
 import pytest
+import subprocess
 
 from testcontainers.compose import DockerCompose
 from testcontainers.core.docker_client import DockerClient
 from testcontainers.core.exceptions import NoSuchPortExposed
 
 
 def test_can_spawn_service_via_compose():
-    with DockerCompose("tests") as compose:
+    with DockerCompose('tests') as compose:
         host = compose.get_service_host("hub", 4444)
         port = compose.get_service_port("hub", 4444)
         assert host == "0.0.0.0"
@@ -53,3 +54,11 @@ def test_can_get_logs():
         compose.wait_for("http://%s:4444/wd/hub" % docker.host())
         stdout, stderr = compose.get_logs()
         assert stdout, 'There should be something on stdout'
+
+
+def test_can_pass_env_params_by_env_file():
+    with DockerCompose('tests', compose_file_name='docker-compose-3.yml', env_file='.env.test') as compose:
+        check_env_is_set_cmd = 'docker exec tests_mysql_1 printenv | grep TEST_ASSERT_KEY'.split()
+        out = subprocess.run(check_env_is_set_cmd, stdout=subprocess.PIPE)
+        assert out.stdout.decode('utf-8').splitlines()[0], 'test_is_passed'
+