tests: Move the fake webapp's server code to a separate file

tests/conftest.py

@@ -1,13 +1,9 @@
-import os
-import sys
-from multiprocessing import Process
 from urllib import parse
 from urllib.request import urlopen
 
 import pytest
 
-from tests.fake_webapp import EXAMPLE_APP
-from tests.fake_webapp import start_flask_app
+from tests.fake_webapp_server import start_server, stop_server
 
 import splinter
 from splinter import Browser
@@ -30,57 +26,8 @@ def selenium_server_is_running():
     return "WebDriver Hub" in page_contents
 
 
-class Env:
-    def __init__(self):
-        self.process = None
-        self.host = "localhost"
-        self.port = 5000
-
-
-env = Env()
-
-
-def wait_until_start():
-    while True:
-        try:
-            results = urlopen(EXAMPLE_APP)
-            if results.code == 404:
-                raise Exception("%s returned unexpected 404" % EXAMPLE_APP)
-            break
-        except OSError:
-            pass
-
-
-def wait_until_stop():
-    while True:
-        try:
-            results = urlopen(EXAMPLE_APP)
-            if results.code == 404:
-                break
-        except OSError:
-            break
-
-
-def start_server():
-    sys.stderr = open(os.devnull, "w")
-    env.process = Process(target=start_flask_app, args=(env.host, env.port))
-    env.process.daemon = True
-    env.process.start()
-    wait_until_start()
-
-
-def stop_server():
-    env.process.terminate()
-    env.process.join()
-    wait_until_stop()
-
-
 def pytest_configure(config):
-    try:
-        start_server()
-    except Exception as e:
-        sys.stdout.write("Failed to start test server: %s\n\n" % e)
-        sys.exit(1)
+    start_server()
 
 
 def pytest_unconfigure(config):

tests/fake_webapp_server.py

@@ -0,0 +1,58 @@
+import multiprocessing
+import os
+import sys
+from urllib.request import urlopen
+
+from tests.fake_webapp import EXAMPLE_APP
+from tests.fake_webapp import start_flask_app
+
+
+class Env:
+    def __init__(self):
+        self.process = None
+        self.host = "localhost"
+        self.port = 5000
+
+
+env = Env()
+
+
+def wait_until_start():
+    while True:
+        try:
+            results = urlopen(EXAMPLE_APP)
+            if results.code == 404:
+                raise Exception("%s returned unexpected 404" % EXAMPLE_APP)
+            break
+        except OSError:
+            pass
+
+
+def wait_until_stop():
+    while True:
+        try:
+            results = urlopen(EXAMPLE_APP)
+            if results.code == 404:
+                break
+        except OSError:
+            break
+
+
+def start_server():
+    """Start the Flask app used for integration testing."""
+    try:
+        sys.stderr = open(os.devnull, "w")
+        env.process = multiprocessing.Process(target=start_flask_app, args=(env.host, env.port))
+        env.process.daemon = True
+        env.process.start()
+        wait_until_start()
+    except Exception as e:
+        sys.stdout.write("Failed to start test server: %s\n\n" % e)
+        sys.exit(1)
+
+
+def stop_server():
+    """Stop the Flask app used for integration testing."""
+    env.process.terminate()
+    env.process.join()
+    wait_until_stop()