ci: Add test cases for rendering the cards (DenverCoder1#44)

Author: DenverCoder1

api/__init__.py

@@ -0,0 +1 @@
+from .index import app

tests/conftest.py

@@ -0,0 +1,8 @@
+import pytest
+
+from api import app
+
+
+@pytest.fixture()
+def client():
+    return app.test_client()

tests/test_app.py

@@ -1 +1,73 @@
-"""TODO: Tests for the rendering of SVG cards."""
+import re
+from urllib.parse import urlencode
+
+
+def test_request_no_id(client):
+    response = client.get("/")
+    data = response.data.decode("utf-8")
+
+    assert response.status_code == 400
+    assert "Required parameter 'id' is missing" in data
+
+
+def test_request_invalid_id(client):
+    response = client.get("/?id=**********")
+    data = response.data.decode("utf-8")
+
+    assert response.status_code == 400
+    assert "id expects a video ID but got '**********'" in data
+
+
+def test_request_unknown_id(client):
+    response = client.get("/?id=abc_123-456")
+    data = response.data.decode("utf-8")
+
+    assert response.status_code == 404
+    assert "Not Found" in data
+
+
+def test_request_valid_params(client):
+    params = {
+        "id": "dQw4w9WgXcQ",
+        "title": "Rick Astley - Never Gonna Give You Up (Official Music Video)",
+        "timestamp": "1256450400",
+        "background_color": "#000000",
+        "title_color": "#111111",
+        "stats_color": "#222222",
+        "width": "500",
+        "duration": "211",
+    }
+    response = client.get(f"/?{urlencode(params)}")
+    data = response.data.decode("utf-8")
+
+    assert response.status_code == 200
+
+    # test views
+    views_regex = re.compile(r"\d+(?:\.\d)?[KMBT]? views")
+    assert views_regex.search(data) is not None
+
+    # test width
+    assert 'width="500"' in data
+
+    # test background color
+    assert 'fill="#000000"' in data
+
+    # test title color
+    assert 'fill="#111111"' in data
+
+    # test stats color
+    assert 'fill="#222222"' in data
+
+    # test title
+    assert "Rick Astley - Never Gonna Give You Up (Official Music Video)" in data
+
+    # test duration
+    assert "3:31" in data
+
+    # test thumbnail
+    thumbnail_regex = re.compile(r'href="data:image/jpeg;base64,[a-zA-Z0-9+/]+={0,2}"')
+    assert thumbnail_regex.search(data) is not None
+
+    # test timestamp
+    timestamp_regex = re.compile(r"\d+ years ago")
+    assert timestamp_regex.search(data) is not None