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helpers_spec.rb
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helpers_spec.rb
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require 'spec_helper'
describe Webmachine::Decision::Helpers do
include_context "default resource"
subject { Webmachine::Decision::FSM.new(resource, request, response) }
def resource_with(&block)
klass = Class.new(Webmachine::Resource) do
def to_html; "test resource"; end
end
klass.module_eval(&block) if block_given?
klass.new(request, response)
end
let(:resource) { resource_with }
describe "accepting request bodies" do
let(:resource) do
resource_with do
def initialize
@accepted, @result = [], true
end
attr_accessor :accepted, :result
def content_types_accepted
(accepted || []).map {|t| Array === t ? t : [t, :accept_doc] }
end
def accept_doc; result; end
end
end
it "should return 415 when no types are accepted" do
subject.accept_helper.should == 415
end
it "should return 415 when the posted type is not acceptable" do
resource.accepted = %W{application/json}
headers['Content-Type'] = "text/xml"
subject.accept_helper.should == 415
end
it "should call the method for the first acceptable type, taking into account params" do
resource.accepted = ["application/json;v=3", ["application/json", :other]]
resource.should_receive(:other).and_return(true)
headers['Content-Type'] = 'application/json;v=2'
subject.accept_helper.should be_true
end
end
context "setting the Content-Length header when responding" do
[204, 205, 304].each do |code|
it "removes the header for entity-less response code #{code}" do
response.headers['Content-Length'] = '0'
response.body = nil
subject.send :respond, code
response.headers.should_not include 'Content-Length'
end
end
(200..599).each do |code|
# 204, 205 and 304 have no bodies, 404 is set to a default
# non-zero response by Webmachine
next if [204, 205, 304, 404].include? code
it "adds the header for response code #{code} that should include an entity but has an empty body" do
response.code = code
response.body = nil
subject.send :respond, code
response.headers['Content-Length'].should == '0'
end
end
(200..599).each do |code|
next if [204, 205, 304].include? code
it "does not add the header when Transfer-Encoding is set on code #{code}" do
response.headers['Transfer-Encoding'] = 'chunked'
response.body = []
subject.send :respond, code
response.headers.should_not include 'Content-Length'
end
end
end
describe "#encode_body" do
before { subject.run }
context "with a String body" do
before { response.body = '<body></body>' }
it "does not modify the response body" do
subject.encode_body
String.should === response.body
end
it "sets the Content-Length header in the response" do
subject.encode_body
response.headers['Content-Length'].should == response.body.bytesize.to_s
end
end
shared_examples_for "a non-String body" do
it "does not set the Content-Length header in the response" do
subject.encode_body
response.headers.should_not have_key('Content-Length')
end
it "sets the Transfer-Encoding response header to chunked" do
subject.encode_body
response.headers['Transfer-Encoding'].should == 'chunked'
end
end
context "with an Enumerable body" do
before { response.body = ['one', 'two'] }
it "wraps the response body in an EnumerableEncoder" do
subject.encode_body
Webmachine::Streaming::EnumerableEncoder.should === response.body
end
it_should_behave_like "a non-String body"
end
context "with a callable body" do
before { response.body = Proc.new { 'proc' } }
it "wraps the response body in a CallableEncoder" do
subject.encode_body
Webmachine::Streaming::CallableEncoder.should === response.body
end
it_should_behave_like "a non-String body"
end
context "with a Fiber body" do
before { response.body = Fiber.new { Fiber.yield "foo" } }
it "wraps the response body in a FiberEncoder" do
subject.encode_body
Webmachine::Streaming::FiberEncoder.should === response.body
end
it_should_behave_like "a non-String body"
end
context "with a File body" do
before { response.body = File.open("spec/spec_helper.rb", "r") }
it "wraps the response body in an IOEncoder" do
subject.encode_body
Webmachine::Streaming::IOEncoder.should === response.body
end
it "sets the Content-Length header to the size of the file" do
subject.encode_body
response.headers['Content-Length'].should == File.stat('spec/spec_helper.rb').size.to_s
end
it "progressively yields file contents for each enumeration" do
subject.encode_body
body_size = 0
response.body.each do |chunk|
chunk.should be_a(String)
body_size += chunk.length
end
body_size.should == File.stat('spec/spec_helper.rb').size
end
context "when the resource provides a non-identity encoding that the client accepts" do
let(:resource) do
resource_with do
def encodings_provided
{ "deflate" => :encode_deflate, "identity" => :encode_identity }
end
end
end
let(:headers) do
Webmachine::Headers.new({"Accept-Encoding" => "deflate, identity"})
end
it_should_behave_like "a non-String body"
end
end
context "with a StringIO body" do
before { response.body = StringIO.new("A VERY LONG STRING, NOT") }
it "wraps the response body in an IOEncoder" do
subject.encode_body
Webmachine::Streaming::IOEncoder.should === response.body
end
it "sets the Content-Length header to the size of the string" do
subject.encode_body
response.headers['Content-Length'].should == response.body.size.to_s
end
context "when the resource provides a non-identity encoding that the client accepts" do
let(:resource) do
resource_with do
def encodings_provided
{ "deflate" => :encode_deflate, "identity" => :encode_identity }
end
end
end
let(:headers) do
Webmachine::Headers.new({"Accept-Encoding" => "deflate, identity"})
end
it_should_behave_like "a non-String body"
end
end
end
end