Commit 404a01ab authored by Robert Speicher's avatar Robert Speicher

Add specs for syntax_highlight JS

Also makes it work when given a parent element containing a
`.js-syntax-highlight` element so for dynamically-added things like
notes or Markdown previews, we can more accurately target just the
element we care about.
parent 7cbf5e4d
# Syntax Highlighter
#
# Applies a syntax highlighting color scheme CSS class to any element with the
# `js-syntax-highlight` class
#
......@@ -6,7 +8,13 @@
# <div class="js-syntax-highlight"></div>
#
$.fn.syntaxHighlight = ->
if $(this).hasClass('js-syntax-highlight')
# Given the element itself, apply highlighting
$(this).addClass(gon.user_color_scheme)
else
# Given a parent element, recurse to any of its applicable children
$children = $(this).find('.js-syntax-highlight')
$children.syntaxHighlight() if $children.length
$(document).on 'ready page:load', ->
$('.js-syntax-highlight').syntaxHighlight()
#= require syntax_highlight
describe 'Syntax Highlighter', ->
stubUserColorScheme = (value) ->
window.gon ?= {}
window.gon.user_color_scheme = value
describe 'on a js-syntax-highlight element', ->
beforeEach ->
fixture.set('<div class="js-syntax-highlight"></div>')
it 'applies syntax highlighting', ->
stubUserColorScheme('monokai')
$('.js-syntax-highlight').syntaxHighlight()
expect($('.js-syntax-highlight')).toHaveClass('monokai')
describe 'on a parent element', ->
beforeEach ->
fixture.set """
<div class="parent">
<div class="js-syntax-highlight"></div>
<div class="foo"></div>
<div class="js-syntax-highlight"></div>
</div>
"""
it 'applies highlighting to all applicable children', ->
stubUserColorScheme('monokai')
$('.parent').syntaxHighlight()
expect($('.parent, .foo')).not.toHaveClass('monokai')
expect($('.monokai').length).toBe(2)
it 'prevents an infinite loop when no matches exist', ->
fixture.set('<div></div>')
highlight = -> $('div').syntaxHighlight()
expect(highlight).not.toThrow()
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