Require the main prometheus_exporter module in client and server modules

lib/prometheus_exporter/client.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require_relative "../prometheus_exporter"
 require "socket"
 require "logger"
 

lib/prometheus_exporter/server.rb

@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 
+require_relative "../prometheus_exporter"
 require_relative "metric"
 require_relative "server/type_collector"
 require_relative "server/web_collector"

test/client_independent_loading_test.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+# This test verifies that the client can be loaded independently
+# without requiring the main prometheus_exporter module first.
+#
+# DO NOT require test_helper here, as it pre-loads the main module.
+
+require "minitest/autorun"
+
+class ClientIndependentLoadingTest < Minitest::Test
+  def test_client_has_constants_when_loaded_independently
+    require_relative "../lib/prometheus_exporter/client"
+
+    assert_equal 9394, PrometheusExporter::DEFAULT_PORT
+    assert_equal "localhost", PrometheusExporter::DEFAULT_BIND_ADDRESS
+    assert_equal 2, PrometheusExporter::DEFAULT_TIMEOUT
+  end
+end

test/server_independent_loading_test.rb

@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+# This test verifies that the server can be loaded independently
+# without requiring the main prometheus_exporter module first.
+#
+# DO NOT require test_helper here, as it pre-loads the main module.
+
+require "minitest/autorun"
+
+class ServerIndependentLoadingTest < Minitest::Test
+  def test_server_has_constants_when_loaded_independently
+    require_relative "../lib/prometheus_exporter/server"
+
+    assert_equal 9394, PrometheusExporter::DEFAULT_PORT
+    assert_equal "localhost", PrometheusExporter::DEFAULT_BIND_ADDRESS
+    assert_equal 2, PrometheusExporter::DEFAULT_TIMEOUT
+    assert_equal "ruby_", PrometheusExporter::DEFAULT_PREFIX
+    assert_equal "Prometheus Exporter", PrometheusExporter::DEFAULT_REALM
+  end
+end