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# frozen_string_literal: true
require_relative 'helper'
separate_testing do
require_relative '../lib/rack/content_length'
require_relative '../lib/rack/lint'
require_relative '../lib/rack/mock_request'
end
describe Rack::ContentLength do
def content_length(app)
Rack::Lint.new Rack::ContentLength.new(app)
end
def request
Rack::MockRequest.env_for
end
it "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'].must_equal '13'
end
it "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'].must_be_nil
end
it "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'].must_equal '1'
end
it "not set content-length on 304 responses" do
app = lambda { |env| [304, {}, []] }
response = content_length(app).call(request)
response[1]['content-length'].must_be_nil
end
it "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'].must_be_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'].must_be_nil
# end
it "close bodies that need to be closed" do
body = Struct.new(:body) do
attr_reader :closed
def each; body.each {|b| yield b}; close; end
def close; @closed = true; end
def to_ary; enum_for.to_a; end
end.new(%w[one two three])
app = lambda { |env| [200, { 'content-type' => 'text/plain' }, body] }
content_length(app).call(request)
body.closed.must_equal true
end
it "support single-execute bodies" do
body = Struct.new(:body) do
def each
yield body.shift until body.empty?
end
def to_ary; enum_for.to_a; 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'].must_equal expected.join.size.to_s
response[2].to_enum.to_a.must_equal expected
end
end
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