ruby-sdk/test/mcp/instrumentation_test.rb
Koichi ITO 0c729d0a2d Use autoload to defer loading of unused subsystems
## Motivation and Context

`lib/mcp.rb` currently declares all `require_relative` statements in one place.
As a result, Server and Client are both loaded, the stdio and Streamable HTTP
transports are both loaded, and Tool, Prompt, and Resource are all loaded,
regardless of which components are actually used.

These components are selected by the user depending on their use case,
so loading everything upfront is unnecessary.

Using `autoload` for selected constants defers loading until the constant
is actually referenced, so only the subsystems required by the user are loaded.

## How Has This Been Tested?

All existing tests pass unchanged.

## Breaking Change

None. This change only defers loading of unused components.
2026-03-12 14:08:27 +09:00

64 lines
2 KiB
Ruby

# frozen_string_literal: true
require "test_helper"
require "mcp/instrumentation"
module MCP
class InstrumentationTest < ActiveSupport::TestCase
class Subject
include Instrumentation
attr_reader :instrumentation_data_received, :configuration
def initialize
@configuration = MCP::Configuration.new
@configuration.instrumentation_callback = ->(data) { @instrumentation_data_received = data }
end
def instrumented_method
instrument_call("instrumented_method") do
# nothing to do
end
end
def instrumented_method_with_additional_data
instrument_call("instrumented_method_with_additional_data") do
add_instrumentation_data(additional_data: "test")
end
end
end
test "#instrument_call adds the method name to the instrumentation data" do
subject = Subject.new
subject.instrumented_method
assert_equal({ method: "instrumented_method" }, subject.instrumentation_data_received.tap do |data|
data.delete(:duration)
end)
end
test "#instrument_call exposes data added via add_instrumentation_data" do
subject = Subject.new
subject.instrumented_method_with_additional_data
assert_equal(
{ method: "instrumented_method_with_additional_data", additional_data: "test" },
subject.instrumentation_data_received.tap { |data| data.delete(:duration) },
)
end
test "#instrument_call resets the instrumentation data between calls" do
subject = Subject.new
subject.instrumented_method_with_additional_data
assert_equal(
{ method: "instrumented_method_with_additional_data", additional_data: "test" },
subject.instrumentation_data_received.tap { |data| data.delete(:duration) },
)
subject.instrumented_method
assert_equal({ method: "instrumented_method" }, subject.instrumentation_data_received.tap do |data|
data.delete(:duration)
end)
end
end
end