test: Cover Rails.logger

Signed-off-by: Ferenc Géczi <[email protected]>

test/frameworks/rails_test.rb

@@ -0,0 +1,38 @@
+# (c) Copyright IBM Corp. 2024
+
+require 'test_helper'
+require 'rack/test'
+require 'rails'
+
+class RailsTest < Minitest::Test
+  include Rack::Test::Methods
+  begin
+    ENV['INSTANA_TEST'] = nil
+    APP = Rack::Builder.parse_file('test/support/apps/rails_generic/config.ru')
+  ensure
+    ENV['INSTANA_TEST'] = 'true'
+  end
+
+  railties_version = Gem::Specification.find_by_name('railties').version
+  if railties_version < Gem::Version.new('7.1.0')
+    APP = APP.first
+  end
+
+  def app
+    APP
+  end
+
+  def test_log
+    clear_all!
+
+    get '/base/log_warning'
+    assert last_response.ok?
+
+    spans = ::Instana.processor.queued_spans
+    assert spans[0][:data][:log]
+    log_span = spans[0][:data][:log]
+
+    assert_equal "Warn", log_span[:level]
+    assert_equal "This is a test warning", log_span[:message]
+  end
+end

test/support/apps/rails_generic/config.ru

@@ -0,0 +1,30 @@
+# (c) Copyright IBM Corp. 2024
+
+require 'rails'
+require 'action_controller/railtie'
+
+class TestControllerApplication < Rails::Application
+  config.eager_load = 'test'
+  config.consider_all_requests_local = false
+  config.secret_key_base = 'test_key'
+  config.secret_token = 'test_token'
+
+  if Rails::VERSION::MAJOR > 5
+    config.hosts.clear
+  end
+
+  routes.append do
+    get '/base/log_warning' => 'test_base#log_warning'
+  end
+end
+
+class TestBaseController < ActionController::Base
+  def log_warning
+    Rails.logger.warn "This is a test warning"
+    render plain: 'Test warning logged'
+  end
+end
+
+TestControllerApplication.initialize!
+
+run TestControllerApplication