[Tests] Add basic tests for takedowns

Would have ccaught the breakage from frozen string literals

test/factories/takedown.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+FactoryBot.define do
+  factory(:takedown) do
+    creator_ip_addr { "127.0.0.1" }
+    email { "dummy@example.com" }
+    source { "example.com" }
+    reason { "foo" }
+    instructions { "bar" }
+  end
+end

test/functional/takedowns_controller_test.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class TakedownsControllerTest < ActionDispatch::IntegrationTest
+  should "render the index" do
+    create_list(:takedown, 2)
+    get takedowns_path
+
+    assert_response :success
+  end
+
+  should "render the index for admins" do
+    create_list(:takedown, 2)
+    get_auth takedowns_path, create(:admin_user)
+
+    assert_response :success
+  end
+
+  should "allow creation" do
+    takedown_post = create(:post)
+    post takedowns_path, params: { takedown: { email: "dummy@example.com", reason: "foo", post_ids: "#{takedown_post.id} #{takedown_post.id + 1}" }, format: :json }
+
+    takedown = Takedown.last
+    assert_redirected_to takedown_path(takedown, code: takedown.vericode)
+    assert_equal(takedown_post.id.to_s, takedown.post_ids)
+    assert_operator(takedown.vericode.length, :>, 8)
+  end
+end