Add week4 challenge to community-contributions
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Oluwaseyi-A
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week4/community-contributions/unit-test-generator-v3.ipynb
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week4/community-contributions/unit-test-generator-v3.ipynb
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{
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"cells": [
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{
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"cell_type": "markdown",
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"id": "56957b7f-e289-4999-8a40-ce1a8378d8cd",
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"metadata": {},
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"source": [
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"# Unit Test Generator\n",
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"\n",
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"The requirement: use a Frontier model to generate fast and repeatable unit tests for Python code.\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "3ef67ef0-1bda-45bb-abca-f003217602d4",
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"metadata": {},
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"outputs": [],
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"source": [
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"# imports\n",
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"\n",
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"import os\n",
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"import io\n",
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"import sys\n",
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"import ast\n",
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"import unittest, contextlib\n",
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"from dotenv import load_dotenv\n",
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"from openai import OpenAI\n",
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"import google.generativeai\n",
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"import anthropic\n",
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"from IPython.display import Markdown, display, update_display\n",
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"import gradio as gr\n",
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"import subprocess\n",
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"\n",
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"# environment\n",
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"\n",
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"load_dotenv(override=True)\n",
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"os.environ['OPENAI_API_KEY'] = os.getenv('OPENAI_API_KEY', 'your-key-if-not-using-env')\n",
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"os.environ['ANTHROPIC_API_KEY'] = os.getenv('ANTHROPIC_API_KEY', 'your-key-if-not-using-env')\n",
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"\n",
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"openai = OpenAI()\n",
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"claude = anthropic.Anthropic()\n",
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"OPENAI_MODEL = \"gpt-4o\"\n",
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"CLAUDE_MODEL = \"claude-3-7-sonnet-20250219\"\n",
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"\n",
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"system_message = \"You are an assistant that implements unit testing for Python code. \"\n",
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"system_message += \"Respond only with Python code; use comments sparingly and do not provide any explanation other than occasional comments. \"\n",
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"\n",
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"def remove_main_block_from_code(code):\n",
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" \"\"\"\n",
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" Remove top-level `if __name__ == \"__main__\":` blocks from code.\n",
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" \"\"\"\n",
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" try:\n",
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" tree = ast.parse(code)\n",
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"\n",
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" class RemoveMain(ast.NodeTransformer):\n",
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" def visit_If(self, node):\n",
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" # check if this is: if __name__ == \"__main__\":\n",
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" test = node.test\n",
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" if (\n",
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" isinstance(test, ast.Compare) and\n",
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" isinstance(test.left, ast.Name) and\n",
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" test.left.id == \"__name__\" and\n",
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" len(test.ops) == 1 and isinstance(test.ops[0], ast.Eq) and\n",
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" len(test.comparators) == 1 and\n",
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" isinstance(test.comparators[0], ast.Constant) and\n",
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" test.comparators[0].value == \"__main__\"\n",
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" ):\n",
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" return None # remove this node entirely\n",
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" return node\n",
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"\n",
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" tree = RemoveMain().visit(tree)\n",
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" ast.fix_missing_locations(tree)\n",
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" return ast.unparse(tree) # get back code as string\n",
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" except Exception as e:\n",
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" print(\"Error removing __main__ block:\", e)\n",
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" return code # fallback: return original code if AST fails\n",
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"\n",
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"def user_prompt_for(python_file):\n",
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" if isinstance(python_file, dict): # from Gradio\n",
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" file_path = python_file[\"name\"]\n",
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" elif hasattr(python_file, \"name\"): # tempfile\n",
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" file_path = python_file.name\n",
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" else: # string path\n",
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" file_path = python_file\n",
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"\n",
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" with open(file_path, \"r\", encoding=\"utf-8\") as f:\n",
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" python_code = f.read()\n",
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"\n",
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" # strip __main__ blocks\n",
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" python_code = remove_main_block_from_code(python_code)\n",
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"\n",
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" user_prompt = \"Write unit tests for this Python code. \"\n",
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" user_prompt += \"Respond only with Python code; do not explain your work other than a few comments. \"\n",
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" user_prompt += \"The unit testing is done in Jupyterlab, so you should use packages that play nicely with the Jupyter kernel. \\n\\n\"\n",
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" user_prompt += \"Include the original Python code in your generated output so that I can run all in one fell swoop.\\n\\n\"\n",
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" user_prompt += python_code\n",
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"\n",
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" return user_prompt\n",
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"\n",
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"def messages_for(python_file):\n",
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" return [\n",
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" {\"role\": \"system\", \"content\": system_message},\n",
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" {\"role\": \"user\", \"content\": user_prompt_for(python_file)}\n",
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" ]\n",
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"\t\n",
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"def stream_gpt(python_file): \n",
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" stream = openai.chat.completions.create(model=OPENAI_MODEL, messages=messages_for(python_file), stream=True)\n",
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" reply = \"\"\n",
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" for chunk in stream:\n",
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" fragment = chunk.choices[0].delta.content or \"\"\n",
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" reply += fragment\n",
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" yield reply.replace('```python\\n','').replace('```','')\n",
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"\t\t\n",
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"def stream_claude(python_file):\n",
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" result = claude.messages.stream(\n",
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" model=CLAUDE_MODEL,\n",
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" max_tokens=2000,\n",
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" system=system_message,\n",
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" messages=[{\"role\": \"user\", \"content\": user_prompt_for(python_file)}],\n",
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" )\n",
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" reply = \"\"\n",
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" with result as stream:\n",
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" for text in stream.text_stream:\n",
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" reply += text\n",
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" yield reply.replace('```python\\n','').replace('```','')\n",
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"\t\t\t\n",
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"def unit_test(python_file, model):\n",
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" if model==\"GPT\":\n",
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" result = stream_gpt(python_file)\n",
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" elif model==\"Claude\":\n",
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" result = stream_claude(python_file)\n",
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" else:\n",
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" raise ValueError(\"Unknown model\")\n",
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" for stream_so_far in result:\n",
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" yield stream_so_far\n",
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"\n",
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"def execute_python(code):\n",
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" buffer = io.StringIO()\n",
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" try:\n",
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" with contextlib.redirect_stdout(buffer), contextlib.redirect_stderr(buffer):\n",
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" # execute code in isolated namespace\n",
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" ns = {}\n",
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" exec(code, ns)\n",
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"\n",
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" # manually collect TestCase subclasses\n",
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" test_cases = [\n",
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" obj for obj in ns.values()\n",
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" if isinstance(obj, type) and issubclass(obj, unittest.TestCase)\n",
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" ]\n",
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" if test_cases:\n",
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" suite = unittest.TestSuite()\n",
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" for case in test_cases:\n",
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" suite.addTests(unittest.defaultTestLoader.loadTestsFromTestCase(case))\n",
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" runner = unittest.TextTestRunner(stream=buffer, verbosity=2)\n",
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" runner.run(suite)\n",
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" except Exception as e:\n",
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" print(f\"Error during execution: {e}\", file=buffer)\n",
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"\n",
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" return buffer.getvalue()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "670b8b78-0b13-488a-9533-59802b2fe101",
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"metadata": {},
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"outputs": [],
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"source": [
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"# --- Gradio UI ---\n",
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"with gr.Blocks() as ui:\n",
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" gr.Markdown(\"## Unit Test Generator\\nUpload a Python file and get structured unit testing.\")\n",
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" with gr.Row(): # Row 1\n",
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" orig_code = gr.File(label=\"Upload your Python file\", file_types=[\".py\"])\n",
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" test_code = gr.Textbox(label=\"Unit test code:\", lines=10)\n",
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" with gr.Row(): # Row 2\n",
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" model = gr.Dropdown([\"GPT\", \"Claude\"], label=\"Select model\", value=\"GPT\")\n",
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" with gr.Row(): # Row 3\n",
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" generate = gr.Button(\"Generate unit test code\")\n",
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" with gr.Row(): # Row 4\n",
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" unit_run = gr.Button(\"Run Python unit test\")\n",
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" with gr.Row(): # Row 5\n",
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" test_out = gr.Textbox(label=\"Unit test result:\", lines=10)\n",
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"\n",
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" generate.click(unit_test, inputs=[orig_code, model], outputs=[test_code])\n",
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"\n",
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" unit_run.click(execute_python, inputs=[test_code], outputs=[test_out])"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "609bbdc3-1e1c-4538-91dd-7d13134ab381",
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"metadata": {},
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"outputs": [],
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"source": [
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"ui.launch(inbrowser=True)"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.11.13"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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