Eight principles of element positioning

1.id： Similar to a person's ID number , Generally correct , Will not be associated with other labels id Repeat .

2.name The name of the person's ID card , There may be repeated , If you encounter more than one of the same name The label of , Then return to the first name value .

3.class： Style of label , Such as input、image etc. , This method is also not commonly used , because className Too much content , And there is a space separator . Therefore, it is easy to parse errors in positioning .

4.TagName： Locate according to the tag name , However, there are multiple tag names on the same page , Use only under certain circumstances , For example, it is occasionally used to obtain form data .

5.xpath： One of the most frequently used positioning methods , A positioning method similar to a file management system , Divide the elements into paths , Locate elements by path .

      Absolute path ：html/body/div/div/span/input

      Relative paths ：//*[@id="kw"] (// Represents the root directory 'html',* All elements ,@id Indicates that the element has a id attribute ,kw Represents the value of the property )

      The method in IE in , Can't support .

6.CSS selctor For only IE Browser web The system performs element positioning , Recommended use .

    According to the label id Look for the element ：input#su  (input Represents the tag name of the element to be found ,# That represents the label id,su Represents the attribute value of an element )

    Find elements based on other attributes of the tag ：input[name="wd"](input Represents the tag name of the element to be found ,[name=] That represents the label name attribute ,wd Represents the value of the property ),

    If multiple attributes are searched together, multiple [] Express , for example input[name="wd"][class="s_ipt"]

7.LinkText： Positioning method dedicated to positioning links .

8.PartiaLinkText： Positioning method dedicated to positioning links , Fuzzy location . Be similar to sql Medium like %%

automated testing ：

      During the test , Choose the most appropriate method , The most stable and effective , Run the method with the highest success rate to locate elements .

https://www.cnblogs.com/softerware/p/10874905.html