Extreme Programming in Perl Robert Nagler phần 5 docx

implement the functions on demand for the customer. The functions are

responsible for checking the computer’s role in the script. For example, this

test script states that the user clicks on the Dogs link on the home page.

If the Dogs link is missing from the home page or spelled incorrectly, the

follow link action stops and indicates that the test script has failed. This

approach is called fast fail, and makes it easy to write and maintain test

scripts. In keeping with the movie script analogy, it’s like when the director

sees computer screwing up its lines, and yells, “cut!”. Everybody stops. The

director corrects what’s wrong, and the actors start over again.

The next section tests the search facility. We should be able to find our

dog by searching for corgi, CORGI, and dogs wales. We aren’t particularly

interested in Corgis7

, rather our goal is to test that the search mechanism

is case-insensitive and supports multiple words. And, most importantly, the

list of search results allows the buyer to place found animals in their cart

easily. Shoppers should be given an opportunity to buy what they find.

8.4 Group Multiple Paths

8.4. GROUP MULTIPLE PATHS

The previous example demonstrated testing multiple paths, that is, different

ways of doing the same thing. In one case, we searched for a Female Puppy

Corgi hierarchically, and then we used the search box to find the same dog

using different keywords. Here is another example that demonstrates mul￾tiple paths:

test_setup(’PetShop’);

home_page();

follow_link(’Reptiles’);

follow_link(’Rattlesnake’);

add_to_cart(’Rattleless Rattlesnake’);

remove_from_cart(’Rattleless Rattlesnake’);

search_for(’Angelfish’);

add_to_cart(’Large Angelfish’);

update_cart(’Large Angelfish’, 0);

7 Or other high-energy small dogs.

Copyright c 2004 Robert Nagler

All rights reserved [email protected]

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