从 minitest 测试名称解析常量。

假设以下规范风格测试

describe WidgetsController, :index do
  describe "authenticated user" do
    describe "returns widgets" do
      it "has a controller that exists" do
        assert_kind_of WidgetsController, @controller
      end
    end
  end
end

测试将具有以下名称

"WidgetsController::index::authenticated user::returns widgets"

常量 WidgetsController 可以从名称解析。以下代码将解析常量

controller = determine_constant_from_test_name(name) do |constant|
  Class === constant && constant < ::ActionController::Metal
end