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# Copyright, 2018, by Samuel G. D. Williams. <http://www.codeotaku.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
require_relative 'connection_context'
RSpec.describe Protocol::HTTP2::Stream do
include_context Protocol::HTTP2::Connection
before do
client.open!
server.open!
end
it "can set the priority of a stream" do
stream = client.create_stream
priority = stream.priority
expect(priority.weight).to be 16
priority.weight = 32
stream.priority = priority
expect(server.read_frame).to be_a Protocol::HTTP2::PriorityFrame
expect(server.dependencies[stream.id].weight).to be == 32
end
it "can make an exclusive stream" do
a, b, c, d = 4.times.collect {client.create_stream}
# a
# /
# b
begin
a.priority = a.priority
server.read_frame
priority = b.priority
priority.stream_dependency = a.id
b.priority = priority
server.read_frame
end
expect(a.dependency.children).to be == {b.id => b.dependency}
expect(server.dependencies).to include(a.id)
expect(server.dependencies[a.id].children).to be == {b.id => server.dependencies[b.id]}
# a
# / \
# b c
begin
priority = c.priority
priority.stream_dependency = a.id
c.priority = priority
server.read_frame
end
expect(a.dependency.children).to be == {b.id => b.dependency, c.id => c.dependency}
expect(server.dependencies[a.id].children).to be == {b.id => server.dependencies[b.id], c.id => server.dependencies[c.id]}
# a
# |
# d
# / \
# b c
begin
priority = d.priority
priority.stream_dependency = a.id
priority.exclusive = true
d.priority = priority
server.read_frame
end
expect(a.dependency.children).to be == {d.id => d.dependency}
expect(d.dependency.children).to be == {b.id => b.dependency, c.id => c.dependency}
expect(server.dependencies[a.id].children).to be == {d.id => server.dependencies[d.id]}
expect(server.dependencies[d.id].children).to be == {b.id => server.dependencies[b.id], c.id => server.dependencies[c.id]}
end
it "correctly allocates window" do
parent = client.create_stream
children = 2.times.collect {client.create_stream}
children.each do |child|
priority = child.priority
priority.stream_dependency = parent.id
child.priority = priority
end
2.times {server.read_frame}
# Now we have this prioritization on the server:
# a
# / \
# b c
expect(server.dependencies[children[0].id]).to receive(:consume_window).with(0xFFFF / 2).once
expect(server.dependencies[children[1].id]).to receive(:consume_window).with(0xFFFF / 2).once
server.consume_window
end
it "correctly allocates window" do
streams = 4.times.collect{client.create_stream}
top = streams.first
top.send_headers(nil, [])
top.send_reset_stream
2.times {server.read_frame}
# The dependency has been recycled:
expect(server.dependencies).to_not include(top.id)
bottom = streams.last
priority = bottom.priority
priority.stream_dependency = top.id
bottom.send_headers(priority, [])
1.times {server.read_frame}
expect(server.dependencies).to include(bottom.id)
dependency = server.dependencies[bottom.id]
expect(dependency.parent).to be == server.dependency
end
end
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