Add unit tests with pytest

.gitignore

 builddir
 .flatpak-builder
+__pycache__

.gitlab-ci.yml

-test:lints:
+test:pycodestyle:
     image: debian:stretch
     script:
         - apt update && apt install --no-install-recommends -y gir1.2-gtk-3.0 python3-gi python3-pip python3-setuptools
         - pip3 install -r requirements-dev.txt
         - tools/tests/test-pycodestyle.sh
+
+test:pylint:
+    image: debian:stretch
+    script:
+        - apt update && apt install --no-install-recommends -y gir1.2-gtk-3.0 python3-gi python3-pip python3-setuptools
+        - pip3 install -r requirements-dev.txt
         - tools/tests/test-pylint.sh
+
+test:pytest:
+    image: debian:stretch
+    script:
+        - apt update && apt install --no-install-recommends -y gir1.2-gtk-3.0 python3-gi python3-pip python3-setuptools
+        - pip3 install -r requirements-dev.txt
+        - tools/tests/test-pytest.sh

requirements-dev.txt

 -r requirements.txt
 pycodestyle>=2.5.0
 pylint>=2.3.1
+pytest>=4.6.2
+requests_mock>=1.6.0

tests/briar/api/models/test_contacts.py

+# Copyright (c) 2019 Nico Alt
+# SPDX-License-Identifier: AGPL-3.0-only
+# License-Filename: LICENSE.md
+
+import json
+import requests_mock
+from unittest import mock, TestCase
+
+from briar.api.models.contacts import Contacts
+
+
+class TestContacts(TestCase):
+
+    @requests_mock.Mocker()
+    def test_get(self, requests_mock):
+        api = mock.Mock()
+        contacts = Contacts(api)
+        response_mock = {}
+        response_mock["author"] = {}
+        response_mock["author"]["formatVersion"] = 1
+        response_mock["author"]["id"] = "y1wkIzAimAbYoCGgWxkWlr6vnq1F8t1QRA/UMPgI0E0="
+        response_mock["author"]["name"] = "Test"
+        response_mock["author"]["publicKey"] = "BDu6h1S02bF4W6rgoZfZ6BMjTj/9S9hNN7EQoV05qUo="
+        response_mock["contactId"] = 1
+        response_mock["alias"] = "A local nickname"
+        response_mock["handshakePublicKey"] = "XnYRd7a7E4CTqgAvh4hCxh/YZ0EPscxknB9ZcEOpSzY="
+        response_mock["verified"] = True
+
+        requests_mock.get("http://localhost:7000/v1/contacts", text=json.dumps(response_mock))
+        self.assertEqual(contacts.get(), response_mock)

tools/run-tests.sh

@@ -2,3 +2,4 @@
 
 tools/tests/test-pycodestyle.sh
 tools/tests/test-pylint.sh
+tools/tests/test-pytest.sh

tools/tests/test-pytest.sh

+#!/usr/bin/env bash
+
+PYTHONPATH=src pytest tests/