在运行测试套件时动态创建机器人框架测试用例

2022-03-15 00:00:00 python robotframework

问题描述

我有一个非常具体的场景,其中我要向数据库插入一些数据(例如,假设插入3次,每个插入都返回一些ID),并且我希望根据返回值为这些返回值创建动态测试用例 例如

*** Variables ***
@{result}    ${EMPTY}

*** Test Cases ***
Some dummy sql inserts
    ${result}    Insert sql statements    dt1    dt2    dt3 #e.g. return ['123', '456', '789']

Verify some ids
    # NOPE, sorry i can't use [Template] because each iteration is not marked on a report as a "TEST" but as a "VAR"
    Verify if ids exist somewhere ${result} #This keyword execution should create another 3 test cases, one for each item from ${result} list

*** Keywords ***
Insert sql statement
    [Arguments]    @{data}
    Create List    ${result}
    FOR    ${elem}    IN    @{data}
        ${return_id}    SomeLib.Execute SQL    INSERT INTO some_table(some_id) VALUES (${elem})
        Append To List    ${result}    ${return_id}
    END
    [Return]    ${result}

Verify if ids exist somewhere
    [Arguments]    ${some_list_of_ids}
    FOR    ${id}    IN    @{some_list_of_ids}
        So some stuff on ${id}
    END

我试图通过参考robot API documentation找出如何做到这一点,但没有成功。 您能告诉/建议这是否可行吗?如果可行,那么我怎样才能做到这一点呢?
到目前为止,我已经想出了两种方法:

  1. 通过创建监听器
  2. 通过创建OWN关键字

在这两种情况下,我都必须将逻辑放在那里,但不知道如何在飞翔上创建测试用例。
请帮帮忙好吗?:)

附注:有些例子非常受欢迎。提前感谢


解决方案

有一篇博客帖子为您提供了答案: https://gerg.dev/2018/09/dynamically-create-test-cases-with-robot-framework/

正如您所建议的,解决方案是创建一个侦听器,以便您可以动态添加测试。只要仔细阅读这篇文章就可以了,因为这里有一些限制,比如什么时候可以创建测试,什么时候不可以创建(在执行过程中)。 另外,这篇文章是针对3.x框架的,而对于4.x,您需要在类中做一些微小的更改,通过替换: tc.keywords.create(name=kwname,args=args) 使用: tc.body.create_keyword(name=kwname,args=args)。

实现示例:

demo.bot:

*** Settings ***
Library           DynamicTestCases.py

*** Test Cases ***
Create Dynamic Test Cases
    @{TestNamesList}    Create List    "Test 1"    "Test 2"    "Test 3"
    FOR    ${element}    IN    @{TestNamesList}
        Add Test Case    ${element}   Keyword To Execute
    END

*** Keywords ***
Keyword To Execute
    Log    This is executed for each test!

DynamicTestCases.py内容(我发布的url的基本副本+更改的行):

from __future__ import print_function
from robot.running.model import TestSuite


class DynamicTestCases(object):
    ROBOT_LISTENER_API_VERSION = 3
    ROBOT_LIBRARY_SCOPE = 'TEST SUITE'

    def __init__(self):
        self.ROBOT_LIBRARY_LISTENER = self
        self.current_suite = None

    def _start_suite(self, suite, result):
        # save current suite so that we can modify it later
        self.current_suite = suite

    def add_test_case(self, name, kwname, *args):
        """Adds a test case to the current suite

        'name' is the test case name
        'kwname' is the keyword to call
        '*args' are the arguments to pass to the keyword

        Example:
            add_test_case  Example Test Case  
            ...  log  hello, world  WARN
        """
        tc = self.current_suite.tests.create(name=name)
        #tc.keywords.create(name=kwname, args=args) #deprecated in 4.0
        tc.body.create_keyword(name=kwname, args=args)

# To get our class to load, the module needs to have a class
# with the same name of a module. This makes that happen:
globals()[__name__] = DynamicTestCases

这是一个如何使其工作的小示例。 例如,如果您想给关键字指定一个变量,只需添加参数:

*** Settings ***
Library           DynamicTestCases.py

*** Test Cases ***
Create Dynamic Test Cases
    @{TestNamesList}    Create List    "Test 1"    "Test 2"    "Test 3"
    FOR    ${element}    IN    @{TestNamesList}
        Add Test Case    ${element}   Keyword To Execute    ${element}
    END

*** Keywords ***
Keyword To Execute
    [Arguments]    ${variable}
    Log    The variable sent to the test was: ${variable}

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