diff --git a/webApp/tests/test_app.py b/webApp/tests/test_app.py
new file mode 100644
index 0000000..fb704d5
--- /dev/null
+++ b/webApp/tests/test_app.py
@@ -0,0 +1,132 @@
+# test_app.py
+import pytest
+import threading
+import time
+from unittest.mock import patch, MagicMock 
+from webApp.app import app, allowed_file, process_task, generate_fun_message, openai
+
+
+class TestConfig:
+    SECRET_KEY = "test_secret_key"
+
+
+@pytest.fixture(name="testing_app")
+def testing_app_fixture():
+    """
+    Test app for other function tests
+    """
+    test_app = app
+    test_app.config.from_object(TestConfig)  # Use the test configuration
+    test_app.config["TESTING"] = True
+    return test_app
+
+
+
+IMAGE_PATH = "test_png/tester_photo.png"
+
+
+@pytest.fixture(name="client")
+def client_fixture(testing_app):
+    """
+    Test client for other function tests
+    """
+    return testing_app.test_client()
+
+@pytest.fixture(name="task_queue")
+def task_queue_fixture():
+    """
+    Test queue for tasks
+    """
+    test_queue = []
+    yield test_queue
+
+# Test function for allowed_file
+def test_allowed_file():
+    """
+    Test allowed_file function
+    """
+    assert allowed_file("test.png"), "Test case failed: allowed_file('test.png')"
+    assert allowed_file("test.jpg"), "Test case failed: allowed_file('test.jpg')"
+    assert allowed_file("test.jpeg"), "Test case failed: allowed_file('test.jpeg')"
+    assert allowed_file("test.gif"), "Test case failed: allowed_file('test.gif')"
+    assert not allowed_file("test.txt"), "Test case failed: allowed_file('test.txt')"
+
+# Test function for home route
+def test_home(client):
+    """
+    Test home function
+    """
+    response = client.get('/')
+    assert response.status_code == 200
+
+# Test function for upload image route
+def test_upload_image(client):
+    """
+    Test upload image page and functionality
+    """
+    response = client.get('/upload')
+    assert response.status_code == 200
+
+    with open(IMAGE_PATH, "rb") as image_file:
+        data = {
+            "age": (None, "30"),
+            "image": (image_file, "tester_photo.png")
+        }
+        response = client.post("/upload", data=data)
+    assert response.status_code == 400
+
+# Test function for start_task route
+def test_start_task(client):
+    """
+    Test start_task function
+    """
+    data = {"task_id": "12345"}
+    response = client.post("/start_task", json=data)
+    assert response.status_code == 202
+
+# Test function for process_task function
+def test_process_task(task_queue):
+    """
+    Test process_task function
+    """
+    task_queue.append("12345")
+    threading.Thread(target=process_task, daemon=True).start()
+    time.sleep(1)
+    assert task_queue == ["12345"]
+
+# Test function for get_result route
+def test_get_result(client):
+    """
+    Test get_result function
+    """
+    task_id = "12345"
+    response = client.get(f"/get_result/{task_id}")
+    assert response.status_code == 202
+
+    data = response.json
+    assert data["task_id"] == task_id
+    assert data["status"] == "Processing"
+
+# Test function for generate_fun_message function (OpenAI)
+@patch.object(openai.chat.completions, 'create')
+def test_generate_fun_message(mock_create):
+    # Configure the mock response
+    mock_response = MagicMock()
+    mock_response.choices = [MagicMock(message=MagicMock(content="Have a great day!"))]
+    mock_create.return_value = mock_response
+
+    # Call the function being tested
+    prompt = "Generate a fun message for someone who is 30 years old and seems Happy."
+    fun_message = generate_fun_message(prompt)
+
+    # Assert that the API call was made with the correct arguments
+    mock_create.assert_called_with(
+        model="gpt-3.5-turbo",
+        messages=[
+            {"role": "system", "content": "You are a helpful assistant."},
+            {"role": "user", "content": prompt}
+        ]
+    )
+
+    # Assert that the returned message is as expected
+    assert fun_message == "Have a great day!"