diff --git a/test/lib/xdotool/adapter_test.rb b/test/lib/xdotool/adapter_test.rb
new file mode 100644
index 0000000..d7d96dc
--- /dev/null
+++ b/test/lib/xdotool/adapter_test.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'minitest/autorun'
+require_relative '../../test_helper'
+
+module Xdotool
+  class AdapterTest < Minitest::Test
+    def setup
+      @position = { x: 1, y: 2 }
+      @adapter = Adapter.new
+    end
+
+    def test_left_click
+      mock_kernel = Minitest::Mock.new
+      mock_kernel.expect(:system, nil, ['xdotool mousemove 1 2 click 1'])
+      Kernel.stub :system, ->(a) { mock_kernel.system(a) } do
+        @adapter.left_click(@position)
+      end
+      mock_kernel.verify
+    end
+
+    def test_right_click
+      mock_kernel = Minitest::Mock.new
+      mock_kernel.expect(:system, nil, ['xdotool mousemove 1 2 click 3'])
+      Kernel.stub :system, ->(a) { mock_kernel.system(a) } do
+        @adapter.right_click(@position)
+      end
+      mock_kernel.verify
+    end
+  end
+end
diff --git a/test/lib/xdotool/position_parse_test.rb b/test/lib/xdotool/position_parse_test.rb
index 28a19e3..135b5d2 100644
--- a/test/lib/xdotool/position_parse_test.rb
+++ b/test/lib/xdotool/position_parse_test.rb
@@ -3,13 +3,15 @@
 require 'minitest/autorun'
 require_relative '../../test_helper'
 
-class PositionParserTest < Minitest::Test
-  def setup
-    @position = 'x:761 y:1051 screen:0 window:20971523'
-    @expect_result = { x: 761, y: 1051 }
-  end
+module Xdotool
+  class PositionParserTest < Minitest::Test
+    def setup
+      @position = 'x:761 y:1051 screen:0 window:20971523'
+      @expect_result = { x: 761, y: 1051 }
+    end
 
-  def test_version
-    assert_equal @expect_result, Xdotool::PositionParser.parse(@position)
+    def test_parser
+      assert_equal @expect_result, PositionParser.parse(@position)
+    end
   end
 end
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 9c21673..f6f91df 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -3,3 +3,4 @@
 require_relative '../lib/boaw'
 require_relative '../lib/boaw/version'
 require_relative '../lib/xdotool/position_parser'
+require_relative '../lib/xdotool/adapter'