Robot Framework从类中生成两个实例而不是一个实例 [英] Robot Framework makes two instances from the class instead of one

问题描述

我有一个python类：

I have a python class:

from robot.api import logger
class TestClass(object):
    def __init__(self, arg1, arg2):
        self.arg1 = arg1
        self.arg2 = arg2
        logger.info('initialized', also_console=True)

    def print_arg1(self):
        print self.arg1

    def print_arg2(self):
        print self.arg2

我写了一个名为CommonKeywords.robot的关键字文件：

I have wrote a keyword file named "CommonKeywords.robot":

*** Settings ***
Library     ../Libs/TestClass.py     arg1   arg2        WITH NAME    class1

*** Keywords ***
print arg1 class1
    class1.print_arg1

print arg2 class1
    class1.print_arg2

我的方案文件是scenario.robot：

And my scenario file is "scenario.robot":

*** Settings ***
Resource    ../Keywords/CommonKeywords.robot

*** Test Cases ***
Test Prints
    print arg1 class1

这是我的项目结构：

Test
---- Keywords
     ---- CommonKeywords.robot
---- Scenarios
     ---- scenario.robot
---- Libs
     ---- TestClass.py

我将目录更改为 Test / Scenarios 并在命令行中键入 pybot scenario.robot 。该脚本打印两个初始化，这意味着它已经初始化了两次对象：

I change directory to the Test/Scenarios and type pybot scenario.robot in the command line. The script prints two initialized which means it had been initialized the object twice:

问题是什么？

我改变了我的课程：

from robot.api import logger
class TestClass(object):
    ROBOT_LIBRARY_SCOPE = 'GLOBAL'
    def __init__(self, arg1, arg2):
        self.arg1 = arg1
        self.arg2 = arg2
        logger.info('initialized', also_console=True)

    def print_arg1(self):
        print self.arg1

    def print_arg2(self):
        print self.arg2

这是我想要的，在应用Bryan的答案后我得到了：

This is what I wanted and I have got after applying Bryan's answer:

推荐答案

你需要设定范围你的图书馆。

You need to set the scope of your library.

来自机器人框架用户指南（强调我的）：

Robot Framework试图让测试用例独立于每个
其他：默认情况下，它为每个测试用例
创建测试库的新实例。但是，这种行为并不总是令人满意的，因为有时候测试用例应该能够共享一个共同的状态。
此外，所有库都没有状态，并且根本不需要创建新的
实例。

Robot Framework attempts to keep test cases independent from each other: by default, it creates new instances of test libraries for every test case. However, this behavior is not always desirable, because sometimes test cases should be able to share a common state. Additionally, all libraries do not have a state and creating new instances of them is simply not needed.

如果您希望每个测试套件创建一次类，您可以像这样设置范围：

If you want to have the class created once per test suite, you can set the scope like this:

class TestClass(object):

    ROBOT_LIBRARY_SCOPE = 'TEST SUITE'

    def __init__(self, arg1, arg2):
        ...

如果你希望在整个测试运行的整个过程中只对类进行一次实例化，你可以设置 ROBOT_LIBRARY_SCOPE 到'GLOBAL'。

If you want the class instantiated just once for the life of the entire test run you can set ROBOT_LIBRARY_SCOPE to 'GLOBAL'.

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