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#! /usr/bin/env ruby
require 'spec_helper'
describe "http compression" do
describe "when zlib is not available" do
before(:each) do
Puppet.features.stubs(:zlib?).returns false
require 'puppet/network/http/compression'
class HttpUncompressor
include Puppet::Network::HTTP::Compression::None
end
@uncompressor = HttpUncompressor.new
end
it "should have a module function that returns the None underlying module" do
expect(Puppet::Network::HTTP::Compression.module).to eq(Puppet::Network::HTTP::Compression::None)
end
it "should not add any Accept-Encoding header" do
expect(@uncompressor.add_accept_encoding({})).to eq({})
end
it "should not tamper the body" do
response = stub 'response', :body => "data"
expect(@uncompressor.uncompress_body(response)).to eq("data")
end
it "should yield an identity uncompressor" do
response = stub 'response'
@uncompressor.uncompress(response) { |u|
expect(u).to be_instance_of(Puppet::Network::HTTP::Compression::IdentityAdapter)
}
end
end
describe "when zlib is available" do
before(:each) do
Puppet.features.stubs(:zlib?).returns true
require 'puppet/network/http/compression'
class HttpUncompressor
include Puppet::Network::HTTP::Compression::Active
end
@uncompressor = HttpUncompressor.new
end
it "should have a module function that returns the Active underlying module" do
expect(Puppet::Network::HTTP::Compression.module).to eq(Puppet::Network::HTTP::Compression::Active)
end
it "should add an Accept-Encoding header supporting compression" do
headers = @uncompressor.add_accept_encoding({})
expect(headers).to have_key('accept-encoding')
expect(headers['accept-encoding']).to match(/gzip/)
expect(headers['accept-encoding']).to match(/deflate/)
expect(headers['accept-encoding']).to match(/identity/)
end
describe "when uncompressing response body" do
before do
@response = stub 'response'
@response.stubs(:[]).with('content-encoding')
@response.stubs(:body).returns("mydata")
end
it "should return untransformed response body with no content-encoding" do
expect(@uncompressor.uncompress_body(@response)).to eq("mydata")
end
it "should return untransformed response body with 'identity' content-encoding" do
@response.stubs(:[]).with('content-encoding').returns('identity')
expect(@uncompressor.uncompress_body(@response)).to eq("mydata")
end
it "should use a Zlib inflater with 'deflate' content-encoding" do
@response.stubs(:[]).with('content-encoding').returns('deflate')
inflater = stub 'inflater'
Zlib::Inflate.expects(:new).returns(inflater)
inflater.expects(:inflate).with("mydata").returns "uncompresseddata"
expect(@uncompressor.uncompress_body(@response)).to eq("uncompresseddata")
end
it "should use a GzipReader with 'gzip' content-encoding" do
@response.stubs(:[]).with('content-encoding').returns('gzip')
io = stub 'io'
StringIO.expects(:new).with("mydata").returns io
reader = stub 'gzip reader'
Zlib::GzipReader.expects(:new).with(io).returns(reader)
reader.expects(:read).returns "uncompresseddata"
expect(@uncompressor.uncompress_body(@response)).to eq("uncompresseddata")
end
end
describe "when uncompressing by chunk" do
before do
@response = stub 'response'
@response.stubs(:[]).with('content-encoding')
@inflater = stub_everything 'inflater'
Zlib::Inflate.stubs(:new).returns(@inflater)
end
it "should yield an identity uncompressor with no content-encoding" do
@uncompressor.uncompress(@response) { |u|
expect(u).to be_instance_of(Puppet::Network::HTTP::Compression::IdentityAdapter)
}
end
it "should yield an identity uncompressor with 'identity' content-encoding" do
@response.stubs(:[]).with('content-encoding').returns 'identity'
@uncompressor.uncompress(@response) { |u|
expect(u).to be_instance_of(Puppet::Network::HTTP::Compression::IdentityAdapter)
}
end
%w{gzip deflate}.each do |c|
it "should yield a Zlib uncompressor with '#{c}' content-encoding" do
@response.stubs(:[]).with('content-encoding').returns c
@uncompressor.uncompress(@response) { |u|
expect(u).to be_instance_of(Puppet::Network::HTTP::Compression::Active::ZlibAdapter)
}
end
end
it "should close the underlying adapter" do
adapter = stub_everything 'adapter'
Puppet::Network::HTTP::Compression::IdentityAdapter.expects(:new).returns(adapter)
adapter.expects(:close)
@uncompressor.uncompress(@response) { |u| }
end
end
describe "zlib adapter" do
before do
@inflater = stub_everything 'inflater'
Zlib::Inflate.stubs(:new).returns(@inflater)
@adapter = Puppet::Network::HTTP::Compression::Active::ZlibAdapter.new
end
it "should initialize the underlying inflater with gzip/zlib header parsing" do
Zlib::Inflate.expects(:new).with(15+32)
Puppet::Network::HTTP::Compression::Active::ZlibAdapter.new
end
it "should inflate the given chunk" do
@inflater.expects(:inflate).with("chunk")
@adapter.uncompress("chunk")
end
it "should return the inflated chunk" do
@inflater.stubs(:inflate).with("chunk").returns("uncompressed")
expect(@adapter.uncompress("chunk")).to eq("uncompressed")
end
it "should try a 'regular' inflater on Zlib::DataError" do
@inflater.expects(:inflate).raises(Zlib::DataError.new("not a zlib stream"))
inflater = stub_everything 'inflater2'
inflater.expects(:inflate).with("chunk").returns("uncompressed")
Zlib::Inflate.expects(:new).with.returns(inflater)
@adapter.uncompress("chunk")
end
it "should raise the error the second time" do
@inflater.stubs(:inflate).raises(Zlib::DataError.new("not a zlib stream"))
Zlib::Inflate.expects(:new).with.returns(@inflater)
expect { @adapter.uncompress("chunk") }.to raise_error(Zlib::DataError, /not a zlib stream/)
end
it "should finish the stream on close" do
@inflater.expects(:finish)
@adapter.close
end
it "should close the stream on close" do
@inflater.expects(:close)
@adapter.close
end
end
end
end
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