python - Robot Framework 从类中创建两个实例而不是一个

Question

我有一个 python 类:

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:

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

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

print arg2 class1
    class1.print_arg2

我的场景文件是“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并输入 pybot scenario.robot在命令行中。脚本打印两个 initialized这意味着它已经初始化了对象两次:



问题是什么？？

我这样改变了我的类(class):

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

这就是我想要的，并且在应用 Bryan 的回答后得到了:

Answer 1

您需要设置库的范围。

来自 Robot Framework User's Guide (强调我的):

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.

如果您想为每个测试套件创建一次类，您可以像这样设置范围:

class TestClass(object):

    ROBOT_LIBRARY_SCOPE = 'TEST SUITE'

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

如果您希望该类在整个测试运行期间仅实例化一次，您可以设置 ROBOT_LIBRARY_SCOPE至 'GLOBAL' .