例外のテスト

https://www.lifewithpython.com/2018/11/python-testing-exceptions-with-unittest.html

unittest.mock.patch

https://docs.python.org/ja/3/library/unittest.mock.html#unittest.mock.patch

unittestが実現したいこと

• automation
• sharing of setup and shutdown code for tests
• aggregation of tests into collections
• independence of the tests from the reporting framework

上記の実現のためにunittestがサポートするObject指向なやり方での概念

• test fixture(備品・設備)
  the preparation needed to perform one or more tests, and any associated cleanup actions.

• test case

• test suite

• test runner