Add tests

Author: Consek

.gitignore

@@ -13,3 +13,6 @@ jenkins_password
 /.idea
 
 .env
+
+__pycache__
+.pytest_cache

test/Makefile

@@ -0,0 +1,14 @@
+.PHONY: test intialize_services install_dependencies all
+
+all: intialize_services install_dependencies test
+
+test:
+	PATH=$$PATH:~/.local/bin pytest run_tests.py
+
+intialize_services:
+	docker-compose -f ../.deployment/docker-compose.yml up -d backend redis caddy
+	docker-compose -f ../.deployment/docker-compose.yml exec caddy sh -c "while ! wget backend:8080/healthcheck -q --spider; do sleep 1; done"
+	docker-compose -f ../.deployment/docker-compose.yml up -d
+	
+install_dependencies:
+	pip3 install -r requirements.txt

test/requirements.txt

@@ -0,0 +1,3 @@
+requests
+pytest
+requests_html

test/run_tests.py

@@ -0,0 +1,87 @@
+import requests
+
+frontend_url = "http://localhost:8000/"
+proxy_root_url = "http://localhost:8888/"
+proxy_instances_url = "{}instances".format(proxy_root_url)
+
+def test_if_proxy_returns_404_on_not_root():
+  response = requests.get("http://localhost:8888/")
+  assert response.status_code == 404
+
+def test_if_proxy_instances_returns_200():
+  response = requests.get(proxy_instances_url)
+  assert response.status_code == 200
+
+def test_if_proxy_instances_content_type_is_application_json():
+  response = requests.get(proxy_instances_url)
+  assert response.headers["Content-Type"] == "application/json"
+
+def test_if_all_fields_are_defined():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  for instance in response_body:
+    assert {"hostname", "version", "isProxy", "isActive"} == instance.keys()
+
+def test_number_of_proxy_instances():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isProxy"] == True, response_body))
+  assert len(instance_list) == 4
+  
+
+def test_number_of_backend_instances():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isProxy"] == False, response_body))
+  assert len(instance_list) == 5
+
+def get_hostnames():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  return [instance["hostname"] for instance in response_body]
+
+def test_instance_hostnames_are_stable():
+  initial_set = get_hostnames()
+  for _ in range(1, 21):
+    assert get_hostnames() == initial_set
+
+def test_only_two_instances_are_active():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isActive"] == True, response_body))
+  assert len(instance_list) == 2
+
+def test_only_one_proxy_is_active():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isActive"] == True and 
+    instance["isProxy"] == True, response_body))
+  assert len(instance_list) == 1
+
+def test_only_one_backend_is_active():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isActive"] == True and 
+    instance["isProxy"] == False, response_body))
+  assert len(instance_list) == 1
+
+def test_only_one_backend_is_active():
+  response = requests.get(proxy_instances_url)
+  response_body = response.json()
+  instance_list = list(filter(lambda instance: instance["isActive"] == True and 
+    instance["isProxy"] == False, response_body))
+  assert len(instance_list) == 1
+
+def test_active_proxy_changes():
+  instance_hostnames = set()
+  for _ in range(1, 51):
+    response = requests.get(proxy_instances_url)
+    response_body = response.json()
+    instance = next(filter(lambda instance: instance["isActive"] == True and 
+      instance["isProxy"] == False, response_body))
+    instance_hostnames.add(instance["hostname"])
+  assert len(instance_hostnames) > 1
+
+def test_if_frontend_returns_200():
+  response = requests.get(frontend_url)
+  assert response.status_code == 200