Merge pull request #10 from Kpler/add-tests-to-supermarket

chore(supermarket): add tests

Author: hnomichith

src/supermarket_receipt/.gitignore

@@ -1,26 +1,15 @@
-# Supermarket Receipt in [Python](https://www.python.org/)
+# Supermarket Receipt
 
-## Setup
-
-* Have Python installed
-* Clone the repository
-* On the command line, enter the `SupermarketReceipt-Refactoring-Kata/python` directory
-* On the command line, install requirements, e.g. on the`python -m pip install -r requirements.txt`
-
-## Running Tests
-
-On the command line, enter the `SupermarketReceipt-Refactoring-Kata/python` directory and run
+You are working on the software for a supermarket, in particular for the teller machine that cashiers use to calculate the price of a shopping cart full of items and give the customer a receipt. The supermarket has a catalog of products for sale at various prices. Normally the price of a shopping cart is the sum of the prices of all the items in it. However, at any given time there might be special offers and price reductions on particular products. For example:
 
-```
-pytest
-```
+- 10% discount
+- 3 for the price of 2
+- 2 items for a reduced price
+- 5 items for a reduced price
 
-## Optional: Running [TextTest](https://www.texttest.org/) Tests
+The starting position for this exercise contains the code for setting up the Teller object, a catalog of products, the shopping cart, and any special offers. It can calculate the price of a shopping cart and generate a receipt, but so far there aren't many test cases.
 
-Install TextTest according to the [instructions](https://www.texttest.org/index.html#getting-started-with-texttest) (platform specific).
-
-On the command line, enter the `SupermarketReceipt-Refactoring-Kata/python` directory and run
-
-```
-texttest -a sr -d .
-```
+## Setup
+- make a venv
+- install requirements, e.g. `python -m pip install -r requirements.txt`
+- use pytest to run the tests