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require 'rack/content_length'
require 'rack/lint'
require 'rack/mock'
describe Rack::ContentLength do
def content_length(app)
Rack::Lint.new Rack::ContentLength.new(app)
end
def request
Rack::MockRequest.env_for
end
should "set Content-Length on Array bodies if none is set" do
app = lambda { |env| [200, {'Content-Type' => 'text/plain'}, ["Hello, World!"]] }
response = content_length(app).call(request)
response[1]['Content-Length'].should.equal '13'
end
should "not set Content-Length on variable length bodies" do
body = lambda { "Hello World!" }
def body.each ; yield call ; end
app = lambda { |env| [200, {'Content-Type' => 'text/plain'}, body] }
response = content_length(app).call(request)
response[1]['Content-Length'].should.be.nil
end
should "not change Content-Length if it is already set" do
app = lambda { |env| [200, {'Content-Type' => 'text/plain', 'Content-Length' => '1'}, "Hello, World!"] }
response = content_length(app).call(request)
response[1]['Content-Length'].should.equal '1'
end
should "not set Content-Length on 304 responses" do
app = lambda { |env| [304, {}, []] }
response = content_length(app).call(request)
response[1]['Content-Length'].should.equal nil
end
should "not set Content-Length when Transfer-Encoding is chunked" do
app = lambda { |env| [200, {'Content-Type' => 'text/plain', 'Transfer-Encoding' => 'chunked'}, []] }
response = content_length(app).call(request)
response[1]['Content-Length'].should.equal nil
end
# Using "Connection: close" for this is fairly contended. It might be useful
# to have some other way to signal this.
#
# should "not force a Content-Length when Connection:close" do
# app = lambda { |env| [200, {'Connection' => 'close'}, []] }
# response = content_length(app).call({})
# response[1]['Content-Length'].should.equal nil
# end
should "close bodies that need to be closed" do
body = Struct.new(:body) do
attr_reader :closed
def each; body.join; end
def close; @closed = true; end
def to_ary; end
end.new(%w[one two three])
app = lambda { |env| [200, {'Content-Type' => 'text/plain'}, body] }
response = content_length(app).call(request)
body.closed.should.equal nil
response[2].close
body.closed.should.equal true
end
should "support single-execute bodies" do
body = Struct.new(:body) do
def each
yield body.shift until body.empty?
end
def to_ary; end
end.new(%w[one two three])
app = lambda { |env| [200, {'Content-Type' => 'text/plain'}, body] }
response = content_length(app).call(request)
expected = %w[one two three]
response[1]['Content-Length'].should.equal expected.join.size.to_s
response[2].to_enum.to_a.should.equal expected
end
end