Python中pytest的参数化实例解析

import pytest
@pytest.mark.parametrize("x, y, expected", [
    (1, 2, 3),
    (3, 4, 7),
    (5, 6, 11),
])
def test_addition(x, y, expected):
    assert x + y == expected

import pytest
@pytest.mark.parametrize("test_input, expected_output", [
    ([1, 2, 3], 6),
    ([4, 5, 6], 15),
    ([7, 8, 9], 24),
])
def test_sum(test_input, expected_output):
    assert sum(test_input) == expected_output

import pytest
@pytest.mark.parametrize("test_input, expected_output", [
    ({"x": 1, "y": 2}, 3),
    ({"x": 3, "y": 4}, 7),
    ({"x": 5, "y": 6}, 11),
])
def test_addition(test_input, expected_output):
    assert test_input["x"] + test_input["y"] == expected_output

import pytest
import csv
def read_csv():
    with open('testdata.csv', 'r') as f:
        reader = csv.reader(f)
        rows = []
        for row in reader:
            rows.append(row)
        return rows[1:]
@pytest.mark.parametrize("test_input, expected_output", read_csv())
def test_addition(test_input, expected_output):
    x, y = map(int, test_input.split(','))
    assert x + y == int(expected_output)

import pytest
import time
def get_test_data():
    test_data = []
    start_time = time.time()
    while time.time() - start_time < 10:  # 运行时间小于 10 秒
        x = random.randint(1, 100)
        y = random.randint(1, 100)
        expected = x + y
        test_data.append((x, y, expected))
    return test_data
@pytest.mark.parametrize("x, y, expected", get_test_data())
def test_addition(x, y, expected):
    assert x + y == expected

import pytest
import requests
def get_test_data():
    response = requests.get('https://api.example.com/data')
    test_data = []
    for item in response.json():
        x = item['x']
        y = item['y']
        expected = item['expected']
        test_data.append((x, y, expected))
    return test_data
@pytest.mark.parametrize("x, y, expected", get_test_data())
def test_addition(x, y, expected):
    assert x + y == expected

import pytest
import itertools
@pytest.mark.parametrize("x, y", itertools.product([1, 2, 3], [4, 5, 6]))
def test_multiplication(x, y):
    assert x * y == y * x

import pytest
import random
def get_test_data():
    while True:
        x = random.randint(1, 100)
        y = random.randint(1, 100)
        expected = x + y
        yield (x, y, expected)
@pytest.mark.parametrize("x, y, expected", get_test_data())
def test_addition(x, y, expected):
    assert x + y == expected