add test

Author: Watson1978

Rakefile

@@ -6,7 +6,7 @@ require "rake/testtask"
 Rake::TestTask.new(:test) do |t|
   t.libs << "test"
   t.libs << "lib"
-  t.test_files = FileList["test/**/*_test.rb"]
+  t.test_files = FileList["test/**/test_*.rb"]
 end
 
 task default: :test

test/fluent/plugin/otel_test.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "helper"
+require 'fluent/test/driver/input'
+require 'fluent/plugin/in_otlp'
+
+class Fluent::Plugin::OtelInputTest < Test::Unit::TestCase
+  def config
+    <<~CONFIG
+      tag otlp.test
+      <http>
+        bind 127.0.0.1
+        port 4318
+      </http>
+    CONFIG
+  end
+
+  def create_driver(conf=config)
+    Fluent::Test::Driver::Input.new(Fluent::Plugin::OtlpInput).configure(conf)
+  end
+
+  def test_configure
+    d = create_driver
+    assert_equal "otlp.test", d.instance.tag
+    assert_equal "127.0.0.1", d.instance.http_config.bind
+    assert_equal 4318, d.instance.http_config.port
+  end
+
+end

test/fluent/plugin/test_in_otel.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 $LOAD_PATH.unshift File.expand_path("../lib", __dir__)
-require "fluent/plugin/otel"
 
 require "test-unit"
+require 'fluent/test'
+require 'fluent/test/helpers'