Step aliases

背景

不同 Scenario 都有 Given，不同的 Given 可以共同调用一个函数

second.feature

Feature: Resource owner
    Scenario: I'm the author
        Given I'm an author
        And I have an article
    Scenario: I'm the admin
        Given I'm the admin
        And there's an article

test_second.py python 文件

import pytest
from pytest_bdd import given, scenario
@given("I'm an author", target_fixture="author")
def author():
    print("I'm an author")
    return dict(username="polo")
@given("I'm the admin", target_fixture="author")
def admin():
    print("I'm an admin")
    return dict(username="admin")
@given("I have an article")
@given("there's an article")
def article(author):
    print("two given")
    return author
# scenario
@scenario('second.feature', "I'm the author")
def test_publish():
    pass
@scenario('second.feature', "I'm the admin")
def test_publish2():
    pass

不同 Scenario 的 Given 可以装饰在同一个 Python 函数上

命令行运行

pytest -sq test_second.py

运行结果

I'm an author
two given
.I'm an admin
two given
.
2 passed in 0.01s

注意点

@given("I have an article")
@given("there's an article")
def article(author):
    print("two given")
    return author

假设调用了一个 fixture（这里是 author）而且这个 fixture 是其他 step，那么必须拥有同名的 fixture 才能调用成功，否则会报错

@given("I'm an author", target_fixture="author")
def author():
    print("I'm an author")
    return dict(username="polo")
@given("I'm the admin", target_fixture="author")
def admin():
    print("I'm an admin")
    return dict(username="admin")

可以看到，两个 given 的 target_fixture 是同名的

@given("I'm an author", target_fixture="author")
def author():
    print("I'm an author")
    return dict(username="polo")
# 假如这个 target_fixture 不是 author，那么运行就会报错：fixture 'author' not found
@given("I'm the admin", target_fixture="admin")
def admin():
    print("I'm an admin")
    return dict(username="admin")