9603b2fe93
## Motivation and Context PR #248 introduced server conformance testing using `@modelcontextprotocol/conformance`. This extends coverage to the client side so that `MCP::Client` behavior can also be validated against the MCP specification. ### Scope Client conformance is driven by the conformance runner, which spawns test servers for each scenario and invokes `conformance/client.rb` against them. The client script delegates the MCP initialize handshake to `MCP::Client#connect` and executes scenario-specific operations (for example listing tools or calling a tool). ### Usage Run all conformance tests (server + client): ```console bundle exec rake conformance ``` Run a single client scenario: ```console bundle exec rake conformance SCENARIO=initialize ``` List available scenarios: ```console bundle exec rake conformance_list ``` ## How Has This Been Tested? Ran `bundle exec rake conformance` locally. - Server conformance: 40 passed, 0 failed. - Client conformance: 3 passed, 54 failed (all 54 listed in `expected_failures.yml`). ## Breaking Change No. This change only adds test infrastructure under `conformance/` and does not modify SDK behavior.
101 lines
2.7 KiB
Ruby
101 lines
2.7 KiB
Ruby
# frozen_string_literal: true
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# Starts the conformance server and runs `npx @modelcontextprotocol/conformance` against it.
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require "English"
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require "net/http"
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require_relative "server"
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module Conformance
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class ServerRunner
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# Timeout for waiting for the Puma server to start.
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SERVER_START_TIMEOUT = 20
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SERVER_POLL_INTERVAL = 0.5
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SERVER_HEALTH_CHECK_RETRIES = (SERVER_START_TIMEOUT / SERVER_POLL_INTERVAL).to_i
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def initialize(port: Server::DEFAULT_PORT, scenario: nil, spec_version: nil, verbose: false)
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@port = port
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@scenario = scenario
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@spec_version = spec_version
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@verbose = verbose
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end
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def run
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command = build_command
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server_pid = start_server
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run_conformance(command, server_pid: server_pid)
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end
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private
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def build_command
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expected_failures_yml = File.expand_path("expected_failures.yml", __dir__)
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npx_command = ["npx", "--yes", "@modelcontextprotocol/conformance", "server", "--url", "http://localhost:#{@port}/mcp"]
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npx_command += ["--scenario", @scenario] if @scenario
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npx_command += ["--spec-version", @spec_version] if @spec_version
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npx_command += ["--verbose"] if @verbose
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npx_command += ["--expected-failures", expected_failures_yml]
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npx_command
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end
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def start_server
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puts "Starting conformance server on port #{@port}..."
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server_pid = fork do
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Conformance::Server.new(port: @port).start
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end
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health_url = URI("http://localhost:#{@port}/health")
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ready = false
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SERVER_HEALTH_CHECK_RETRIES.times do
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begin
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response = Net::HTTP.get_response(health_url)
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if response.code == "200"
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ready = true
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break
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end
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rescue Errno::ECONNREFUSED, Errno::ECONNRESET, Net::ReadTimeout
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# not ready yet
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end
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sleep(SERVER_POLL_INTERVAL)
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end
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unless ready
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warn("ERROR: Conformance server did not start within #{SERVER_START_TIMEOUT} seconds")
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terminate_server(server_pid)
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exit(1)
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end
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puts "Server ready. Running conformance tests..."
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server_pid
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end
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def run_conformance(command, server_pid:)
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puts "Command: #{command.join(" ")}\n\n"
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conformance_exit_code = nil
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begin
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system(*command)
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conformance_exit_code = $CHILD_STATUS.exitstatus
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ensure
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terminate_server(server_pid)
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end
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exit(conformance_exit_code || 1) unless conformance_exit_code == 0
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end
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def terminate_server(pid)
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Process.kill("TERM", pid)
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rescue Errno::ESRCH
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# process already exited
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ensure
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begin
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Process.wait(pid)
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rescue Errno::ECHILD
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# already reaped
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end
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end
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end
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end
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