Merge pull request #224 from koic/extract_annotations_from_mcp

Extract `MCP::Annotations` into a dedicated file

test/mcp/annotations_test.rb

@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+module MCP
+  class AnnotationsTest < ActiveSupport::TestCase
+    def test_initialization
+      annotations = Annotations.new(audience: ["developers"], priority: 0.8)
+
+      assert_equal(["developers"], annotations.audience)
+      assert_equal(0.8, annotations.priority)
+      assert_nil(annotations.last_modified)
+
+      assert_equal({ audience: ["developers"], priority: 0.8 }, annotations.to_h)
+    end
+
+    def test_initialization_with_all_attributes
+      timestamp = Time.utc(2025, 1, 12, 15, 0, 58).iso8601
+      annotations = Annotations.new(audience: ["developers"], priority: 0.8, last_modified: timestamp)
+
+      assert_equal(["developers"], annotations.audience)
+      assert_equal(0.8, annotations.priority)
+      assert_equal(timestamp, annotations.last_modified)
+
+      assert_equal({ audience: ["developers"], priority: 0.8, lastModified: timestamp }, annotations.to_h)
+    end
+
+    def test_initialization_by_default
+      annotations = Annotations.new
+
+      assert_nil(annotations.audience)
+      assert_nil(annotations.priority)
+      assert_nil(annotations.last_modified)
+
+      assert_empty(annotations.to_h)
+    end
+
+    def test_initialization_with_partial_attributes
+      annotations = Annotations.new(audience: ["developers"])
+
+      assert_equal(["developers"], annotations.audience)
+      assert_nil(annotations.priority)
+      assert_nil(annotations.last_modified)
+
+      assert_equal({ audience: ["developers"] }, annotations.to_h)
+    end
+
+    def test_initialization_with_last_modified_only
+      timestamp = Time.utc(2025, 1, 12, 15, 0, 58).iso8601
+      annotations = Annotations.new(last_modified: timestamp)
+
+      assert_nil(annotations.audience)
+      assert_nil(annotations.priority)
+      assert_equal(timestamp, annotations.last_modified)
+
+      assert_equal({ lastModified: timestamp }, annotations.to_h)
+    end
+  end
+end