Unit tests Python examples

Presentation with examples of unit tests on Python.

1. ПРОВЕДЕНИЕ UNIT ТЕСТОВ Москва, 2023 г.

2. 2 Виды тестирования

3. Создание Unit теста 3 import unittest class TestStringMethods ( unittest.TestCase ): def test_upper ( self ): self.assertEqual (' foo '. upper (), 'FOO') if __ name __ == '__ main __': unittest.main () python -m unittest Запуск класса из консоли: Пример кода для тестового класса:

4. Тестирование простейшей функции 4 Тестируемая функция: Тестовый класс: import unittest from current import current_calculation class TestCurrent ( unittest.TestCase ): def test_positive ( self ): self.assertEqual ( current_calculation (380, 10), 38) self.assertEqual ( current_calculation (220, 2), 110) self.assertEqual ( current_calculation (12.2, 2), 6.1) if __ name __ == '__ main __': unittest.main () def current_calculation (voltage, resistance): return round(voltage / resistance, 6)

5. Тестирование простейшей функции 5 Тестируемая функция: Тестовый класс: import unittest from current import current_calculation class TestCurrent ( unittest.TestCase ): def test_positive ( self ): self.assertEqual ( current_calculation (380, 10), 38) self.assertEqual ( current_calculation (220, 2), 110) self.assertEqual ( current_calculation (12.2, 2), 6.1) def test_negative_resistance ( self ): self.assertRaises ( ValueError , current_calculation , 100, -2) if __ name __ == '__ main __': unittest.main () def current_calculation (voltage, resistance): if resistance < 0: raise ValueError ("Resistance can`t be negative") return round(voltage / resistance, 6)

6. Тестирование простейшей функции 6 Тестируемая функция: Тестовый класс: import unittest from current import current_calculation class TestCurrent ( unittest.TestCase ): def test_positive ( self ): self.assertEqual ( current_calculation (380, 10), 38) self.assertEqual ( current_calculation (220, 2), 110) self.assertEqual ( current_calculation (12.2, 2), 6.1) def test_zero_division ( self ): self.assertRaises ( ZeroDivisionError , current_calculation , 10, 0) def test_negative_resistance ( self ): self.assertRaises ( ValueError , current_calculation , 100, -2) if __ name __ == '__ main __': unittest.main () def current_calculation (voltage, resistance): if resistance == 0: raise ZeroDivisionError ("Division by zero") if resistance < 0: raise ValueError ("Resistance can`t be negative") return round(voltage / resistance, 6)

7. Тестирование простейшей функции 7 Тестируемая функция: Тестовый класс: import unittest from current import current_calculation class TestCurrent ( unittest.TestCase ): def test_positive ( self ): self.assertEqual ( current_calculation (380, 10), 38) self.assertEqual ( current_calculation (220, 2), 110) self.assertEqual ( current_calculation (12.2, 2), 6.1) def test_type ( self ): self.assertRaises ( TypeError , current_calculation , " Hello World", 2) self.assertRaises ( TypeError , current_calculation , 220, [12]) def test_zero_division ( self ): self.assertRaises ( ZeroDivisionError , current_calculation , 10, 0) def test_negative_resistance ( self ): self.assertRaises ( ValueError , current_calculation , 100, -2) if __ name __ == '__ main __': unittest.main () def current_calculation (voltage, resistance): if type(voltage) not in [ int , float]: raise TypeError ("Voltage must be real number") if type(resistance) not in [ int , float]: raise TypeError ("Resistance must be real number") if resistance == 0: raise ZeroDivisionError ("Division by zero") if resistance < 0: raise ValueError ("Resistance can`t be negative") return round(voltage / resistance, 6)

8. Документация библиотеки 8 https :// docs.python.org/3/library/unittest.html unittest — Unit testing framework