はじめてのPytest

テストコードをさくっと学んだので自分用のメモを残す

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Documents

Pytest

GitHub

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Installation

pip install pytest

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まずは関数をテストする。

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src >> testするファイルを格納

# src/code.py
def sum_numbers(a, b):
    return a + b

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tests >> testcodeを格納するフォルダ
from folder_name import fileName

# tests/test_1.py
from src import code

def test_1():
    result = code.sum_numbers(1, 2)
    assert result == 3
    #assert result == 2 #error 

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テストコードを実行する

pytest testS/test_1.py

成功例

tests\test_1.py .                                                                   [100%] 
================================== 1 passed in 0.02s ====================================== 

失敗例

tests\test_1.py .                                                                   [100%] 
================================== 1 failed in 0.06s ======================================

引数あり

# src/code.py
def sum_numbers(a, b):
    return (a + b), a

# tests/test_1.py
from src import code

def test_1():
    result1, result2 = code.sum_numbers(1, 2)
    assert result1 == 3
    assert result2 == 2

def test_1():
        result1, result2 = code.sum_numbers(1, 2)
        assert result1 == 3
>       assert result2 == 2
E       assert 1 == 2

tests\test_1.py:6: AssertionError
================================= short test summary info ================================== 
FAILED tests/test_1.py::test_1 - assert 1 == 2
================================== 1 failed in 0.07s ======================================= 

# src/code.py
def sum_numbers(a, b):
    return (a + b), a

assert result2 == 1に変更

# tests/test_1.py
from src import code

def test_1():
    result1, result2 = code.sum_numbers(1, 2)
    assert result1 == 3
    assert result2 == 1

tests\test_1.py                                                                      [100%] 
================================== 1 passed in 0.02s =======================================

# from src import code

# def test_1():
#     result1, result2 = code.sum_numbers(1, 2)
#     assert result1 == 3
#     assert result2 == 1

# content of test_class.py

def test_equal():
    result = 1 +2
    assert result == 3

def teest_notequal():
    result = 1 + 2
    assert result != 10
def test_string():
    result = 'hello'
    assert result == 'hello'
def test_string():
    string = 'hello'
    assert string.startswith('H')
def test_string():
    string = 'hello'
    assert 'he' in string
def test_boolean():
    result = True
    assert result == True