Reworking Python testing demo content based on a trial

Author: IshaanDesai

05_testing_and_ci/examples/python_testing/operations.py

@@ -54,10 +54,10 @@ def main():
     data = [5, 3, 14, 27, 4, 9]
 
     maximum = find_max(data)
-    print("Maximum = {}".format(maximum))
+    print("Maximum of {} is {}".format(data, maximum))
 
     mean = find_mean(data)
-    print("Average = {}".format(mean))
+    print("Average of {} is {}".format(data, mean))
 
 
 if __name__ == "__main__":

05_testing_and_ci/examples/python_testing/test_operations_unittests.py

@@ -2,6 +2,7 @@
 Tests for mathematical operations functions.
 """
 from operations import find_max, find_mean
+import unittest
 from unittest import TestCase
 import csv
 
@@ -78,3 +79,7 @@ def test_regression_mean(self):
 
         # Test
         self.assertAlmostEqual(actual_mean, reference_mean[0], 2)
+
+if __name__ == "__main__":
+    # Run the tests
+    unittest.main()

05_testing_and_ci/examples/python_testing/tox.ini

@@ -0,0 +1,7 @@
+requires = ["tox>=4"]
+env_list = ["testing"]
+
+[env.testing]
+description = "Run pytest"
+deps = ["pytest>=8"]
+commands = [["pytest"]]

05_testing_and_ci/examples/python_testing/tox.toml

@@ -24,7 +24,7 @@ pip install -U pytest
 - All tests can be run using the command-line tool called `pytest`. Just type `pytest` in the working directory and hit ENTER.
 - If pytest is installed in some other way, you might need to run it like `python -m pytest`.
 - One test is expected to fail. Reading the error message we understand that the failure occurs because floating-point variable comparison is not handled correctly.
-- We need to tell pytest that while comparing two floating-point variables the value needs to be correct only up to a certain tolerance limit. To do this the expected mean value needs to be changed by uncommenting the line in the following part of the code:
+- We need to tell pytest that while comparing two floating-point variables the value needs to be correct only up to a certain tolerance limit. To do this, the expected mean value needs to be changed by uncommenting the line in the following part of the code:
 
 ```python
 # Expected result
@@ -73,6 +73,7 @@ tests/
 ```
 
 - Putting the tests in a folder `tests/` does not affect the behavior of pytest. When pytest is run from the original directory, the tests are found and run.
+- **Note**: revert to the old directory structure before proceeding to the next section.
 
 ## unittest
 
@@ -125,20 +126,16 @@ coverage html
 
 - Environment orchestrator to setup and execute various tools for a project.
 - `tox` creates virtual environments to run each tools in.
-- Order of preference for files that tox tries to read: `pyproject.toml`, `tox.toml`, `setup.cfg`
 - `tox.toml` file:
 
 ```toml
 requires = ["tox>=4"]
 env_list = ["testing"]
 
-[env_run_base]
-description = "run unit tests"
-deps = [
-    "pytest>=8",
-    "pytest-sugar"
-]
-commands = [["pytest", { replace = "posargs", default = ["tests"], extend = true }]]
+[env.testing]
+description = "Run pytest"
+deps = ["pytest>=8"]
+commands = [["pytest"]]
 ```
 
 - Global settings defined under section at the top of the `tox.toml` file.