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Add ability to modify a selector

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This commit is contained in:
Thomas Walpole 2016-01-06 17:11:00 -08:00
parent 710bc5dca9
commit 46c334cb8a
3 changed files with 99 additions and 21 deletions
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17
lib/capybara.rb
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@ -109,6 +109,23 @@ module Capybara
Capybara::Selector.add(name, &block)
end
##
#
# Modify a selector previously craeated by {Capybara.add_selector}.
# For example modifying the :button selector to also find divs styled
# to look like buttons might look like this
#
# Capybara.modfiy_selector(:button) do
# xpath { |locator| XPath::HTML.button(locator).or(XPath::css('div.btn')[XPath::string.n.is(locator)]) }
# end
#
# @param [Symbol] name The name of the selector to modify
# @yield A block executed in the context of the existing {Capybara::Selector}
#
def modify_selector(name, &block)
Capybara::Selector.update(name, &block)
end
def drivers
@drivers ||= {}
end

12
lib/capybara/selector.rb
View file

@ -49,6 +49,10 @@ module Capybara
all[name.to_sym] = Capybara::Selector.new(name.to_sym, &block)
end
def update(name, &block)
all[name.to_sym].instance_eval(&block)
end
def remove(name)
all.delete(name.to_sym)
end
@ -65,15 +69,19 @@ module Capybara
end
def xpath(&block)
if block
@format = :xpath
@xpath = block if block
@xpath, @css = block, nil
end
@xpath
end
# Same as xpath, but wrap in XPath.css().
def css(&block)
if block
@format = :css
@css = block if block
@css, @xpath = block, nil
end
@css
end

53
spec/selector_spec.rb Normal file
View file

@ -0,0 +1,53 @@
require 'spec_helper'
RSpec.describe Capybara do
describe 'Selectors' do
let :string do
Capybara.string <<-STRING
<html>
<head>
<title>selectors</title>
</head>
<body>
<div class="a" id="page">
<div class="b" id="content">
<h1 class="a">Totally awesome</h1>
<p>Yes it is</p>
</div>
<p class="b">Some Content</p>
<p class="b"></p>
</div>
</body>
</html>
STRING
end
before do
Capybara.add_selector :custom_selector do
css { |css_class| "div.#{css_class}" }
filter(:not_empty, boolean: true, default: true, skip_if: :all) { |node, value| value ^ (node.text == '') }
end
end
describe "modfiy_selector" do
it "allows modifying a selector" do
el = string.find(:custom_selector, 'a')
expect(el.tag_name).to eq 'div'
Capybara.modify_selector :custom_selector do
css { |css_class| "h1.#{css_class}" }
end
el = string.find(:custom_selector, 'a')
expect(el.tag_name).to eq 'h1'
end
it "doesn't change existing filters" do
Capybara.modify_selector :custom_selector do
css { |css_class| "p.#{css_class}"}
end
expect(string).to have_selector(:custom_selector, 'b', count: 1)
expect(string).to have_selector(:custom_selector, 'b', not_empty: false, count: 1)
expect(string).to have_selector(:custom_selector, 'b', not_empty: :all, count: 2)
end
end
end
end