feat: add initial unit tests

Author: tooniez

pytest.ini

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+[pytest]
+pythonpath = .
+testpaths = tests
+addopts = -v -ra -q

requirements-dev.txt

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+httpx
+pytest

tests/test_api.py

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+from fastapi.testclient import TestClient
+from api.server import app
+
+client = TestClient(app)
+
+
+def test_read_root():
+    response = client.get("/")
+    assert response.status_code == 200
+    assert response.json() == {
+        "message": "Hello from FastAPI"
+    }  # Updated expected message
+
+
+def test_demo_post():
+    response = client.post("/demo_post", json={"data": "test"})
+    assert response.status_code == 200
+    assert response.json() == {"message": "Received data: test"}

tests/test_streamlit_app.py

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+import streamlit as st
+from streamlit.testing.v1 import AppTest
+
+
+def test_streamlit_app():
+    # Create an instance of AppTest from file
+    at = AppTest.from_file("app/streamlit_app.py")
+
+    # Run the app
+    at.run()
+
+    print("test_streamlit_app completed successfully")