adding unit test

.github/workflows/github-actions.yml

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+# copy this file to .github/workflows/github-actions.yml in this repository
+name: learn-github-actions
+on: [push]
+jobs:
+  test-my-python-code:
+    # select the os-image these jobs should run on
+    runs-on: ubuntu-20.04
+
+    # define the Python versions that should be used
+    strategy:
+      matrix:
+        python-version: [2.7, 3.8]
+
+    steps:
+      # step to check out the repository
+      - uses: actions/checkout@v2
+
+      # step to create the Python environment
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      # step to install the dependencies
+      - name: Install dependencies
+        run: "pip install -r requirements.txt"
+
+      # step to run tests
+      - run: pytest -v

docs/_config.yml

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+# _config.yml
+# Jekyll configuration
+name:  My Cool Page
+title: My Cool Page
+description: A Documentation Page created with Jekyll
+# theme: jekyll-theme-architect
+remote_theme: pages-themes/cayman@v0.2.0
+plugins:
+- jekyll-remote-theme # add this line to the plugins list if you already have one

docs/index.md

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+<!-- index.md -->
+# My Testing Docs Page
+
+It Works! :-)
+
+1. Have a `_config.yml` file setting a `title`, `name`, `description` and `theme`.
+2. Add an `index.md` file with the landing page in Markdown.
+3. Add more `*.md` files, e.g. `about.md`
+4. add a link to [about.md](about) with: `[about.md](about)`

requirements.txt

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+numpy>=1.0
+pytest
+

test_mean.py

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+from mean import *
+
+def test_ints():
+    num_list = [1,2,3,4,5]
+    obs = mean(num_list)
+    exp = 3
+    assert obs == exp
+
+def test_zero():
+    num_list=[0,2,4,6]
+    obs = mean(num_list)
+    exp = 3
+    assert obs == exp
+
+def test_double():
+    # This one will fail in Python 2
+    # num_list=[1,2,3,4]
+    num_list=[1.0,2.0,3.0,4.0]
+    obs = mean(num_list)
+    exp = 2.5
+    assert obs == exp
+
+def test_long():
+    big = 100000000
+    obs = mean(range(1,big))
+    exp = big/2.0
+    assert obs == exp
+
+def test_complex():
+    # given that complex numbers are an unordered field
+    # the arithmetic mean of complex numbers is meaningless
+    num_list = [2 + 3j, 3 + 4j, -32 - 2j]
+    obs = mean(num_list)
+    exp = NotImplemented
+    assert obs == exp