Add CI pipelines for testing and formatting

.github/workflows/format.yml

@@ -0,0 +1,31 @@
+name: Format
+
+on: [push]
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [3.12.x]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Run Python code formatting with Black
+        uses: lgeiger/black-action@v1.0.1
+        with:
+          args: "."
+
+      - name: Commit changes made by Black
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          commit_message: Format Python code with Black
+
+      - name: Switch to current branch
+        run: git checkout ${{ env.BRANCH }}
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v3.1.4
+        with:
+          python-version: ${{ matrix.python-version }}

.github/workflows/test.yml

@@ -0,0 +1,45 @@
+name: Test
+
+# Controls when the action will run.
+on:
+  # Triggers the workflow on push events but only for the main branch.
+  push:
+  # Allows you to run this workflow manually from the Actions tab.
+  workflow_dispatch:
+
+jobs:
+  test:
+    # The type of runner that the job will run on.
+    runs-on: macos-latest
+    # Configures the build to use the latest version of Python 3.
+    strategy:
+      matrix:
+        python-version: [3.12.x]
+
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can
+      # access it.
+      - uses: actions/checkout@v3
+
+      - name: Switch to current branch
+        run: git checkout ${{ env.BRANCH }}
+
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v1
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install Poetry
+        run: |
+          python -m pip install --upgrade pip
+          pip install poetry
+
+      - name: Install Python dependencies with Poetry
+        run: |
+          poetry install
+
+      - name: Run unit tests with Pytest
+        run: poetry run coverage run --source=src/boruvkas_algorithm -m pytest -v
+
+      - name: Get code coverage report
+        run: poetry run coverage report -m

README.md

@@ -1,5 +1,8 @@
 # Boruvka's Algorithm
 
+[![code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/psf/black)
+[![Test](https://github.com/IsaacCheng9/boruvkas-algorithm/actions/workflows/test.yml/badge.svg)](https://github.com/IsaacCheng9/boruvkas-algorithm/actions/workflows/test.yml)
+
 An implementation of Boruvka's algorithm to find a minimum spanning tree in a graph.
 
 [Link to narrated video demonstration on YouTube.](https://www.youtube.com/watch?v=n5LNVobuBNU)

src/boruvkas_algorithm/boruvka.py

@@ -1,6 +1,7 @@
 """
 Implement Boruvka's algorithm for finding the minimum spanning tree of a graph.
 """
+
 from typing import Dict, List, Optional, Tuple