Home/Coding-standards.md

@@ -33,12 +33,48 @@ So I guess it's okay if we have a few guidelines. The [Google Python Style Guide
 # Testing
 As much as possible, we should write automatic tests for our code using `pytest`
 
-Tests should be located in a `tests` directory, at the root of your repository. 
-
-In this directory, create a file for each module of your package, name following the convention `test_modulename.py`.
+Tests should be located in a `tests` directory, at the root of your repository. In this directory, create a file for each module of your package, name following the convention `test_modulename.py`.
 
 For example, your project structure could be like this:
 
+```
+example-repo/
+┣ qimex/
+┃ ┣ __init__.py
+┃ ┗ examples.py
+┣ tests/
+┃ ┣ __init__.py
+┃ ┗ test_examples.py
+┣ .gitignore
+┣ LICENSE
+┗ README.md
+```
+
+Inside `examples.py` you could have this function:
+
+```python
+def say_hello(user):
+
+    if not isinstance(user, str):
+        raise TypeError("The 'user' argument must be a string.")
+
+    greeting = (f'Hello {user}!')
+
+    return greeting
+```
+This function simply receives a string and returns another string greeting the user.
+
+A `test_examples.py` should contain the test for it:
+
+```python
+def test_say_hello():
+    """ Checks default behaviour """
+    user = "Alice"
+    expected_output = "Hello Alice!"
+    result = qimex.examples.say_hello(user)
+    assert result == expected_output
+```
 
+This is simply running the function and checking if the result is as expected.
 
-Let's say you have a project
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+To run all the tests, navigate to the root of your project and run `pytest`. Everything inside the `tests` folder will be executed, and a report will be shown.
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