##DRY your tests with the Asserter pattern

Creating readable tests with the Asserter pattern.

##Flexbox for fun

Using Flexbox for layouts.

##CSS transparent borders with padding-box

How to use background-clip: padding-box; to create transparent borders.

https://developer.mozilla.org/en-US/docs/Web/CSS/background-clip

##Deleting code with confidence

Tests should give you the confidence to delete code, without unexpected consequences. The value of tests is not in verifying how the code is implemented.

##Favour for replacability over reusability

Code is more likely to be replaced than reused. Design your code to be replaced.