An Introduction to Unit testing, what it is, why is it needed and how it is done. Using QUnit.

1. Software Testing
by Varun Vaddiparty

2. ● User Interface Development
● Source Code
● Quality Assurance (software testing)

3. Need for software testing:
● Meets the requirements
● works as expected
● satisfies the need of customer
Different Methods:
● Static Testing
● Dynamic Testing

6. Unit Testing
● Verify the functionality of specific section of
the code.
● Usually at the function level.
● To ensure that a specific function is working
as expected.

7. Qunit
● A Javascript unit testing framework.
● It can be used to test any generic Javascript
code.
● You can test your code in the browser itself.

9. A minimal Qunit test setup.

10. The contents of test.js :

11. Result of the test:

12. Asserting Results
● Essential elements of any unit tests.
● You express the result expected and have the
testing framework compare them to the
actual values that the functions output.
Qunit provides three assertions:
● ok()
● equal()
● deepEqual()

13. ok()
● ok(truthy,[message])
● most basic assertion
● requires only one argument, in addition you
can send a string to show as a message
examples:
ok(true,”true succeeds”);
ok(1==1,”test passed”);

14. equal()
● equal(actual,expected,[message]);
● compares your expected value with the
actual value
examples:
equal(1,1,”1 equals 1, test passes”);
equal(“”,0,”zero equals empty, test passes”);

15. deepEqual()
● deepEqual(actual,expected,[message]);
● can be used just like equal, is a better choice
● uses more accurate comparison operator
(===) instead of simple (==)
examples:
deepEqual(0,””,”test fails, zero not equal to
empty”);

16. expect()
● used to check whether all the assertions have
been executed or not

17. asyncTest()
● used for asynchronous testing
Practical Example:

20. Thank You