add supermarket katas

Author: hnomichith

src/supermarket_receipt/.gitignore

@@ -0,0 +1,78 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+.pytest_cache
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask instance folder
+instance/
+
+# Sphinx documentation
+docs/_build/
+
+# MkDocs documentation
+/site/
+
+# PyBuilder
+target/
+
+# IPython Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+venv
+.venv
+
+.idea
+.vscode

src/supermarket_receipt/README.md

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+# Supermarket Receipt in [Python](https://www.python.org/)
+
+## 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
+
+```
+pytest
+```
+
+## Optional: Running [TextTest](https://www.texttest.org/) Tests
+
+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 .
+```

src/supermarket_receipt/catalog.py

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+
+class SupermarketCatalog:
+
+    def add_product(self, product, price):
+        raise Exception("cannot be called from a unit test - it accesses the database")
+
+    def unit_price(self, product):
+        raise Exception("cannot be called from a unit test - it accesses the database")
+

src/supermarket_receipt/model_objects.py

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+from enum import Enum
+
+
+class Product:
+    def __init__(self, name, unit):
+        self.name = name
+        self.unit = unit
+
+
+class ProductQuantity:
+    def __init__(self, product, quantity):
+        self.product = product
+        self.quantity = quantity
+
+
+class ProductUnit(Enum):
+    EACH = 1
+    KILO = 2
+
+
+class SpecialOfferType(Enum):
+    THREE_FOR_TWO = 1
+    TEN_PERCENT_DISCOUNT = 2
+    TWO_FOR_AMOUNT = 3
+    FIVE_FOR_AMOUNT = 4
+
+class Offer:
+    def __init__(self, offer_type, product, argument):
+        self.offer_type = offer_type
+        self.product = product
+        self.argument = argument
+
+
+class Discount:
+    def __init__(self, product, description, discount_amount):
+        self.product = product
+        self.description = description
+        self.discount_amount = discount_amount

src/supermarket_receipt/python/.gitignore

@@ -0,0 +1,78 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+.hypothesis/
+.pytest_cache
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+
+# Flask instance folder
+instance/
+
+# Sphinx documentation
+docs/_build/
+
+# MkDocs documentation
+/site/
+
+# PyBuilder
+target/
+
+# IPython Notebook
+.ipynb_checkpoints
+
+# pyenv
+.python-version
+venv
+.venv
+
+.idea
+.vscode

src/supermarket_receipt/python/README.md

@@ -0,0 +1,26 @@
+# Supermarket Receipt in [Python](https://www.python.org/)
+
+## 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
+
+```
+pytest
+```
+
+## Optional: Running [TextTest](https://www.texttest.org/) Tests
+
+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 .
+```

src/supermarket_receipt/python/catalog.py

@@ -0,0 +1,9 @@
+
+class SupermarketCatalog:
+
+    def add_product(self, product, price):
+        raise Exception("cannot be called from a unit test - it accesses the database")
+
+    def unit_price(self, product):
+        raise Exception("cannot be called from a unit test - it accesses the database")
+

src/supermarket_receipt/python/model_objects.py

@@ -0,0 +1,38 @@
+from enum import Enum
+
+
+class Product:
+    def __init__(self, name, unit):
+        self.name = name
+        self.unit = unit
+
+
+class ProductQuantity:
+    def __init__(self, product, quantity):
+        self.product = product
+        self.quantity = quantity
+
+
+class ProductUnit(Enum):
+    EACH = 1
+    KILO = 2
+
+
+class SpecialOfferType(Enum):
+    THREE_FOR_TWO = 1
+    TEN_PERCENT_DISCOUNT = 2
+    TWO_FOR_AMOUNT = 3
+    FIVE_FOR_AMOUNT = 4
+
+class Offer:
+    def __init__(self, offer_type, product, argument):
+        self.offer_type = offer_type
+        self.product = product
+        self.argument = argument
+
+
+class Discount:
+    def __init__(self, product, description, discount_amount):
+        self.product = product
+        self.description = description
+        self.discount_amount = discount_amount

src/supermarket_receipt/python/receipt.py

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+
+class ReceiptItem:
+    def __init__(self, product, quantity, price, total_price):
+        self.product = product
+        self.quantity = quantity
+        self.price = price
+        self.total_price = total_price
+
+
+class Receipt:
+    def __init__(self):
+        self._items = []
+        self._discounts = []
+
+    def total_price(self):
+        total = 0
+        for item in self.items:
+            total += item.total_price
+        for discount in self.discounts:
+            total += discount.discount_amount
+        return total
+
+    def add_product(self, product, quantity, price, total_price):
+        self._items.append(ReceiptItem(product, quantity, price, total_price))
+
+    def add_discount(self, discount):
+        self._discounts.append(discount)
+
+    @property
+    def items(self):
+        return self._items[:]
+
+    @property
+    def discounts(self):
+        return self._discounts[:]