allow both objects and string namespaces

lib/constant_resolver.rb

@@ -123,7 +123,7 @@ def coerce_load_paths(load_paths)
     load_paths = Hash[load_paths.map { |p| [p, "Object"] }] unless load_paths.respond_to?(:transform_keys)
 
     load_paths.transform_keys! { |p| p.end_with?("/") ? p : p + "/" }
-    load_paths.transform_values! { |ns| ns.delete_prefix("::") }
+    load_paths.transform_values! { |ns| ns.to_s.delete_prefix("::") }
 
     load_paths
   end

test/constant_resolver_test.rb

@@ -43,11 +43,14 @@ def test_discovers_simple_constant
     end
 
     def test_resolves_constants_from_non_default_root_path_namespace
+      Object.const_set(:Api, Module.new)
+
       resolver = ConstantResolver.new(
         root_path: "test/fixtures/constant_discovery/valid/",
         load_paths: {
-          "app/models" => "::Object",
-          "app/rest_api" => "::Api",
+          "app/models" => Object,
+          "app/rest_api" => Api,
+          "app/internal" => "::Company::Internal",
         },
       )
 
@@ -58,6 +61,10 @@ def test_resolves_constants_from_non_default_root_path_namespace
       constant = resolver.resolve("Api::Repositories")
       assert_equal("::Api::Repositories", constant.name)
       assert_equal("app/rest_api/repositories.rb", constant.location)
+
+      constant = resolver.resolve("Company::Internal::Main")
+      assert_equal("::Company::Internal::Main", constant.name)
+      assert_equal("app/internal/main.rb", constant.location)
     end
 
     def test_resolve_returns_constant_context

test/fixtures/constant_discovery/valid/app/internal/main.rb

@@ -0,0 +1,8 @@
+# frozen_string_literal: true
+
+module Company
+  module Internal
+    class Main
+    end
+  end
+end