Ejemplo en python

exercises/tiered_pricing/solutions/elwazy-python/.gitignore

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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
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+downloads/
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+.installed.cfg
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+MANIFEST
+
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+#  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.
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exercises/tiered_pricing/solutions/elwazy-python/elwazy_python/license.py

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+from dataclasses import dataclass
+
+
+@dataclass
+class License:
+    amount: int = 0
+
+    def total(self) -> int:
+        price = self.amount * self._price_calculator()
+        return price
+
+    def _price_calculator(self) -> int:
+        match self.amount:
+            case self.amount if self.amount <= 0:
+                raise Exception("should be minimun 1 license!")
+            case self.amount if self.amount <= 2:
+                price = 299
+            case self.amount if self.amount <= 10:
+                price = 239
+            case self.amount if self.amount <= 25:
+                price = 219
+            case self.amount if self.amount <= 50:
+                price = 199
+            case _:
+                price = 149
+        return price

exercises/tiered_pricing/solutions/elwazy-python/pyproject.toml

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+[tool.poetry]
+name = "elwazy-python"
+version = "0.1.0"
+description = "Tiered Pricing Exercise with TDD"
+authors = ["ElWazy"]
+readme = "README.md"
+package-mode = false
+
+[tool.poetry.dependencies]
+python = "^3.12"
+
+[tool.poetry.group.test.dependencies]
+pytest = "^8.2.2"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"

exercises/tiered_pricing/solutions/elwazy-python/tests/test_license_price_calculation.py

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+from typing import reveal_type
+from elwazy_python.license import License
+
+
+def test_buy_one_license_price_calculation():
+    license = License(amount=1)
+    assert license.total() == 299
+
+
+def test_buy_two_license_price_calculation():
+    license = License(amount=2)
+    assert license._price_calculator() == 299
+    assert license.total() == 598
+
+
+def test_should_work_well_license_price_calculation():
+    amounts = [
+        (1, 299),
+        (2, 299),
+        (3, 239),
+        (5, 239),
+        (10, 239),
+        (12, 219),
+        (24, 219),
+        (25, 219),
+        (50, 199),
+        (78, 149),
+    ]
+    for amount, price in amounts:
+        license = License(amount)
+        assert license._price_calculator() == price