Still worrying about how to write web automation test cases? Senior test engineers teach you selenium test case writing hand in hand

To write Selenium The test case is to simulate a series of operations of the user on the browser , Complete automated testing through scripts .

Advantages of writing test cases ：

• Open source , free .

• Support multiple browsers IE,Firefox,Chrome,Safari.

• Support for multiple platforms Windows,Linux,Mac.

• Support for multiple languages Python,Java,C#.

• Yes Web Good support .

• Simple , flexible .

• Support distributed test case execution .

Introduce dependencies

Dependency is introduced to call webdriver To interact with the browser to realize the operation steps .

• Python edition

from selenium import webdriver

Flow of test cases

A test case is a set of sets provided to the system under test in order to implement the test , This set of collections contains ： Test environment 、 Operation steps 、 Test data 、 Expected results, etc .

Be careful ： The final result of a test case is only one ： Success or failure .

The three core elements are ： title 、 step 、 Expected results

• title ： Is a description of the test case , The title should clearly express the content of the test case
• step ： Describe the test execution process
• Expected results ： Provide the expected results of test execution , The expected results are generally based on demand , If the actual results are consistent with the expected results, the test passes , On the contrary, failure .

Practical drill

The first is to import... At the top of the code Selenium My bag , The second is the naming of test methods 、 testing procedure 、 Assertion . The content of the test case is to assert whether the content displayed by opening Baidu page is equal to the expected value .

Python edition

from selenium import webdriver

#  The title of the test is  test_search
def test_search():
    driver = webdriver.Chrome()
    #  Test steps 
    driver.get('https://www.baidu.com')
    search = driver.find_element_by_id('su').get_attribute('value')
    #  Assert the expected result 
    assert search == " Baidu "

Here to assert whether the content displayed by opening Baidu page is equal to the expected value . Because the content actually obtained should be Baidu, not Baidu , So the assertion is wrong .

FAILED                                         [100%]
test_demo.py:3 (test_search)
 use Baidu Search  !=  Baidu 

Expected : Baidu 
Actual   : use Baidu Search 
<Click to see difference>

def test_search():
        driver = webdriver.Chrome()
        driver.get('https://www.baidu.com')
        search = driver.find_element_by_id('su').get_attribute('value')
>       assert search == " Baidu "
E       AssertionError: assert ' use Baidu Search ' == ' Baidu '
test_demo.py:9: AssertionError

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