test: update contact_types/new_spec.rb and add new spec for uniqueness validation within the same group

spec/system/contact_types/new_spec.rb

@@ -1,28 +1,42 @@
+# frozen_string_literal: true
+
 require "rails_helper"
 
 RSpec.describe "contact_types/new", type: :system do
   let!(:organization) { create(:casa_org) }
-  let!(:admin) { create(:casa_admin, casa_org_id: organization.id) }
+  let!(:admin) { create(:casa_admin, casa_org: organization) }
   let!(:contact_type_group) { create(:contact_type_group, casa_org: organization, name: "Contact type group 1") }
-  let!(:contact_type) { create(:contact_type, name: "Contact type 1") }
 
   before do
     sign_in admin
-
-    visit new_contact_type_path(contact_type)
+    visit new_contact_type_path
   end
 
-  it "errors with invalid name" do
-    fill_in "Name", with: ""
-    click_on "Submit"
+  context "with valid data" do
+    it "creates contact type successfully" do
+      fill_in "Name", with: "New Contact Type test"
+      click_on "Submit"
 
-    expect(page).to have_text("Name can't be blank")
+      expect(page).to have_text("Contact Type was successfully created.")
+    end
   end
 
-  it "creates with valid data" do
-    fill_in "Name", with: "New Contact Type test"
-    click_on "Submit"
+  context "with invalid data" do
+    it "shows error when name is blank" do
+      fill_in "Name", with: ""
+      click_on "Submit"
+
+      expect(page).to have_text("Name can't be blank")
+    end
+
+    it "shows error when name is not unique within group" do
+      create(:contact_type, name: "Existing Name", contact_type_group:)
+
+      fill_in "Name", with: "Existing Name"
+      select "Contact type group 1", from: "contact_type_contact_type_group_id"
+      click_on "Submit"
 
-    expect(page).to have_text("Contact Type was successfully created.")
+      expect(page).to have_text("Name should be unique per contact type group")
+    end
   end
 end