Behaviour Driven Development in WordPress

slid.es/tmf/bdd-wp

Automated Tests in WordPress

make.wordpress.com: test suite
Great presentation by @ptahdunbar
wptest.io great test data set

Unit Tests

1 test per "unit"
most common example: Calculator
prepare testing environment
set up your object (i.e. instantiation)
mock dependencies
execute
assert result

WordPress & Dependencies

lots of globals, exits and more bad practices, that make testing hard...

(from http://blog.insight.sensiolabs.com/2014/11/04/technical-debt-relevant-projects.html)

Calculator

?

...but how do I test my website?

A more suitable testing approach: BDD

Dan North introduced BDD in 2006
TDD problems: where should we start, what and
how should we test?
Describe the features in a common language
understood by all stakeholders: clients, PMs, Devs...
Prioritize features by business value
Describe the desired and undesired behaviours of these features with scenarios (examples)
Use these stories as a recipe for automated tests
Implement the features

Gherkin

The common language for

describing features and scenarios

Feature: Read published blog posts
    In order to published read blog posts
    As a reader
    I need to be able to see a list of published posts and read each post individually

    Background:
        Given there are posts
            | post_title      | post_content              | post_status | post_author |
            | Just my article | The content of my article | publish     | 1           |
            | My draft        | This is just a draft      | draft       | 1           |

    Scenario: List my blog posts
        Given I am on the homepage
        Then I should see "Just my article"
        And I should not see "My draft"

    Scenario: Read a blog post
        Given I am on the homepage
        When I follow "Just my article"
        Then I should see "The content of my article"