diff --git a/Rakefile b/Rakefile
index 29955274..6adbdd9d 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1 +1,5 @@
-require "bundler/gem_tasks"
+require 'bundler/gem_tasks'
+require 'rspec/core/rake_task'
+
+RSpec::Core::RakeTask.new('spec')
+task :default => :spec
diff --git a/spec/dump_spec.rb b/spec/dump_spec.rb
new file mode 100644
index 00000000..57f10a40
--- /dev/null
+++ b/spec/dump_spec.rb
@@ -0,0 +1,61 @@
+describe 'Ridgepole::Client#dump' do
+  it do
+    test_client do |client|
+      expect(client.dump).to eq((<<-EOS).chomp)
+create_table "departments", primary_key: "dept_no", force: true do |t|
+  t.string "dept_name", limit: 40, null: false
+end
+
+add_index "departments", ["dept_name"], name: "dept_name", unique: true, using: :btree
+
+create_table "dept_emp", id: false, force: true do |t|
+  t.integer "emp_no",              null: false
+  t.string  "dept_no",   limit: 4, null: false
+  t.date    "from_date",           null: false
+  t.date    "to_date",             null: false
+end
+
+add_index "dept_emp", ["dept_no"], name: "dept_no", using: :btree
+add_index "dept_emp", ["emp_no"], name: "emp_no", using: :btree
+
+create_table "dept_manager", id: false, force: true do |t|
+  t.string  "dept_no",   limit: 4, null: false
+  t.integer "emp_no",              null: false
+  t.date    "from_date",           null: false
+  t.date    "to_date",             null: false
+end
+
+add_index "dept_manager", ["dept_no"], name: "dept_no", using: :btree
+add_index "dept_manager", ["emp_no"], name: "emp_no", using: :btree
+
+create_table "employees", primary_key: "emp_no", force: true do |t|
+  t.date   "birth_date",            null: false
+  t.string "first_name", limit: 14, null: false
+  t.string "last_name",  limit: 16, null: false
+  t.string "gender",     limit: 1,  null: false
+  t.date   "hire_date",             null: false
+end
+
+create_table "salaries", id: false, force: true do |t|
+  t.integer "emp_no",    null: false
+  t.integer "salary",    null: false
+  t.date    "from_date", null: false
+  t.date    "to_date",   null: false
+end
+
+add_index "salaries", ["emp_no"], name: "emp_no", using: :btree
+
+create_table "titles", id: false, force: true do |t|
+  t.integer "emp_no",               null: false
+  t.string  "title",     limit: 50, null: false
+  t.date    "from_date",            null: false
+  t.date    "to_date"
+end
+
+add_index "titles", ["emp_no"], name: "emp_no", using: :btree
+      EOS
+    end
+
+    expect(1).to eq(1)
+  end
+end
diff --git a/spec/ridgepole_spec.rb b/spec/ridgepole_spec.rb
deleted file mode 100644
index f0298df6..00000000
--- a/spec/ridgepole_spec.rb
+++ /dev/null
@@ -1,5 +0,0 @@
-describe Ridgepole::Client do
-  it do
-    expect(1).to eq(1)
-  end
-end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 549f147c..ee1cfadb 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,12 +1,26 @@
 require 'ridgepole'
 
-def restore_database
-  sql_file = File.expand_path('../ridgepole_test.sql', __FILE__)
-  system("mysql -uroot < #{sql_file}")
-end
-
 RSpec.configure do |config|
   config.before(:each) do
     restore_database
   end
 end
+
+def restore_database
+  sql_file = File.expand_path('../ridgepole_test.sql', __FILE__)
+  system("mysql -uroot < #{sql_file}")
+end
+
+def test_client(config = {}, options = {})
+  config = {
+    adapter: 'mysql2',
+    database: 'ridgepole_test',
+  }.merge(config)
+
+  options = {
+  }.merge(options)
+
+  client = Ridgepole::Client.new(config, options)
+
+  yield(client)
+end
\ No newline at end of file