Testing

Question 1

Why is testing early important?

Answer 1

The later that the bug is found… the more expensive it is.

Question 2

Unit testing

Answer 2

Test a single unit of your program:

• Typically: functions
• Success cases, error cases
• easy to automate

Question 3

Integration testing

Answer 3

Test several units together

• Several functions working together
• Several modules/classes working together

Question 4

System testing

Answer 4

Test the entire system

• Use cases
• Test case should cover a reasonable real-life scenario
• Is the correct behaviour visible in the system
• Tricky to automate

Question 5

Acceptance testing

Answer 5

Test the entire system from a customers viewpoint

• Use cases
• Focus on visible functionality
• What do I get back if i put in X?
• Tricky to automate

Question 6

What to test?

Answer 6

UI testing
User experience testing
Functional testing
Performance testing
Robustness testing

Question 7

Test Driven Development TDD

Answer 7

Write tests before you write code

Forces you to think about input/output, behaviour and, error cases

Question 8

Behaviour Driven Development

Answer 8

Write tests before you write code, but in a specific format “Given-When-Then”

Question 9

HTML what to test?

Answer 9

W3C validator

Check that elements exist

Check that HTML functionality works

Mainly in system testing (with css and JS)

Question 10

CSS what to test?

Answer 10

W3C validator

Check that elements have the right look (UI testing)

Check that responsive design works (resizing, media queries) (functional testing)

system testing with html and js

Question 11

JavaScript what to test?

Answer 11

Unit tests

Integration tests

System/acceptance tests in combination with HTML and CSS

Question 12

Mocha

Answer 12

Unit testing framework for JS

Requires some kind of assertion library

Question 13

Chai

Answer 13

Assertion library that allows the TDD/BDD styles

Question 14

mocha/chai syntax

Answer 14

describe('name of test suite' function () {
    it('name of test', function() {
        chai.expect(bla).to.equal(bla);
     }
})

Question 15

Mocha cleanup and preperations

Answer 15

Inside describe blocks there can be

before(function() {})

Question 16

Mocha asynchronous functions

Answer 16

use a function(done) {
done();
}
callback function… otherwise it always passes…