diff --git a/db/schema.rb b/db/schema.rb
index 3557b34..6e34f83 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -10,7 +10,13 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[7.0].define(version: 2023_05_10_075444) do
+ActiveRecord::Schema[7.0].define(version: 2023_05_10_132506) do
+  create_table "domains", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
+    t.string "domain"
+    t.datetime "created_at", null: false
+    t.datetime "updated_at", null: false
+  end
+
   create_table "users", charset: "utf8mb4", collation: "utf8mb4_general_ci", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
diff --git a/test/models/domain_test.rb b/test/models/domain_test.rb
index 7b12fc2..d3022b1 100644
--- a/test/models/domain_test.rb
+++ b/test/models/domain_test.rb
@@ -1,7 +1,18 @@
 require "test_helper"
 
 class DomainTest < ActiveSupport::TestCase
-  # test "the truth" do
-  #   assert true
-  # end
+  test "domain can not be blank" do
+    @d = Domain.new
+    assert !@d.save
+  end
+
+  test "domain can no tbe duplicated" do
+    @d1 = Domain.new
+    @d1.name = "example.com"
+    assert @d1.save
+
+    @d2 = Domain.new
+    @d2.name = "example.com"
+    assert !@d2.save
+  end
 end