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feature a day: baisc template rendering

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This commit is contained in:
John Bintz 2012-01-23 08:56:43 -05:00
parent 5e36e4e8c9
commit 5b8a746e24
13 changed files with 171 additions and 6 deletions
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16
features/build_runner_html.feature Normal file
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@ -0,0 +1,16 @@
Feature: Build Runner HTML
Scenario: All JS files
Given I have the file "template.erb" with the content:
"""
<html>
<%= resource_tags %>
</html>
"""
When I instantiate a template renderer with the template "template.erb" and the files:
| src/source.js |
| spec/spec.js |
And I render the template
Then I should have script tags for the following files in the template:
| src/source.js |
| spec/spec.js |

3
features/step_definitions/given/i_have_file.rb Normal file
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@ -0,0 +1,3 @@
Given /^I have the file "([^"]*)" with the content:$/ do |filename, string|
File.open(filename, 'wb') { |fh| fh.print(string) }
end

9
features/step_definitions/then/i_should_have_script_tags.rb Normal file
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@ -0,0 +1,9 @@
require 'nokogiri'
Then /^I should have script tags for the following files in the template:$/ do |table|
doc = Nokogiri::XML(@result)
table.raw.collect(&:first).each do |file|
doc.at_css("script[src='#{file}']").should_not be_nil
end
end

3
features/step_definitions/when/i_instantiate_template_builder.rb Normal file
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@ -0,0 +1,3 @@
When /^I instantiate a template renderer with the template "([^"]*)" and the files:$/ do |template, table|
@template_renderer = Flowerbox::Delivery::TemplateRenderer.new(:files => table.raw.collect(&:first), :template => template)
end

3
features/step_definitions/when/i_render_template.rb Normal file
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@ -0,0 +1,3 @@
When /^I render the template$/ do
@result = @template_renderer.render
end

5
features/support/env.rb
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@ -1,11 +1,14 @@
require 'flowerbox-delivery'
require 'mocha'
require 'fakefs/safe'
World(Mocha::API)
Before do
mocha_setup
FakeFS.activate!
end
After do
@ -15,6 +18,8 @@ After do
mocha_teardown
end
FakeFS.deactivate!
if @running_server
@running_server[:server].shutdown
@running_server = nil

2
flowerbox-delivery.gemspec
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@ -19,6 +19,8 @@ Gem::Specification.new do |gem|
gem.add_development_dependency 'rspec'
gem.add_development_dependency 'jquery-rails', '~> 1.0.0'
gem.add_development_dependency 'mocha'
gem.add_development_dependency 'fakefs'
gem.add_development_dependency 'nokogiri'
gem.add_runtime_dependency 'rack'
gem.add_runtime_dependency 'sprockets'

1
lib/flowerbox/delivery.rb
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@ -1,6 +1,7 @@
module Flowerbox
module Delivery
autoload :Server, 'flowerbox/delivery/server'
autoload :TemplateRenderer, 'flowerbox/delivery/template_renderer'
end
end

2
lib/flowerbox/delivery/server.rb
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@ -38,7 +38,7 @@ module Flowerbox
def port
return @port if @port ||= options[:port]
attempts = 100
attempts = 20
begin
attempts -= 1

35
lib/flowerbox/delivery/template_renderer.rb Normal file
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@ -0,0 +1,35 @@
require 'erb'
module Flowerbox::Delivery
class TemplateRenderer
class FileTypeError < StandardError ; end
attr_reader :options
def initialize(options)
@options = options
end
def render
ERB.new(template).result(binding)
end
def template
File.read(options[:template])
end
def resource_tags
options[:files].collect do |file|
case File.extname(file)
when '.js'
%{<script src="#{file}" type="text/javascript"></script>}
when '.css'
%{<link rel="stylesheet" href="#{file}" type="text/css" />}
else
raise FileTypeError.new("Unknown file type: #{File.extname(file)} for #{file}")
end
end.join
end
end
end

38
spec/flowerbox/delivery/server_spec.rb
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@ -41,31 +41,59 @@ describe Flowerbox::Delivery::Server do
describe '#port' do
let(:interface) { '127.0.0.1' }
let(:base) { 25000 }
let(:initial) { base + @offset }
before do
server.stubs(:interface).returns(interface)
@offset = 0
ok = true
begin
[ 0, 1 ].each do |index|
begin
TCPSocket.new(interface, base + @offset + index)
@offset += 1
ok = false
rescue Errno::ECONNREFUSED => e
end
end
end while !ok
end
subject { server.port }
context 'no running service' do
before do
Kernel.stubs(:rand).returns(0)
Kernel.stubs(:rand).returns(@offset)
end
it { should == 25000 }
it { should == initial }
end
context 'running service' do
before do
@server = Thread.new do
TCPServer.new(interface, 25000)
TCPServer.new(interface, initial)
end
server.stubs(:random_port).returns(25000, 25001)
server.stubs(:random_port).returns(initial, initial + 1)
while true
begin
TCPSocket.new(interface, initial)
break
rescue Errno::ECONNREFUSED
end
end
end
it { should == 25001 }
it { should == initial + 1 }
after do
@server.kill
end
end
end
end

59
spec/flowerbox/delivery/template_renderer_spec.rb Normal file
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@ -0,0 +1,59 @@
require 'spec_helper'
describe Flowerbox::Delivery::TemplateRenderer do
let(:template_renderer) { described_class.new(:template => template, :files => files) }
let(:template) { 'template' }
let(:files) { 'files' }
let(:rendered_template) { 'rendered template' }
let(:erb_template) { "#{rendered_template} <%= resource_tags %>" }
describe '#render' do
subject { template_renderer.render }
let(:rendered_files) { 'with files' }
let(:result) { "#{rendered_template} #{rendered_files}" }
before do
template_renderer.expects(:resource_tags).returns(rendered_files)
template_renderer.expects(:template).returns(erb_template)
end
it { should == result }
end
describe '#template' do
include FakeFS::SpecHelpers
before do
File.open(template, 'wb') { |fh| fh.print erb_template }
end
subject { template_renderer.template }
it { should == erb_template }
end
describe '#resource_tags' do
subject { template_renderer.resource_tags }
context 'success' do
let(:files) { [ js, css ] }
let(:js) { 'file.js' }
let(:css) { 'file.css' }
it { should == [
%{<script src="#{js}" type="text/javascript"></script>},
%{<link rel="stylesheet" href="#{css}" type="text/css" />}
].join }
end
context 'failure' do
let(:files) { [ 'what.ever' ] }
it 'should raise error' do
expect { subject }.to raise_error(Flowerbox::Delivery::TemplateRenderer::FileTypeError)
end
end
end
end

1
spec/spec_helper.rb
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@ -1,5 +1,6 @@
require 'flowerbox-delivery'
require 'mocha'
require 'fakefs/spec_helpers'
RSpec.configure do |c|
c.mock_with :mocha