Use system specs instead of feature specs

We get rid of database cleaner, and JavaScript tests are faster because
between tests we now rollback transactions instead of truncating the
database.

spec/system/admin/local_census_records/imports_spec.rb

@@ -0,0 +1,90 @@
+require "rails_helper"
+
+describe "Imports" do
+  let(:base_files_path) { %w[spec fixtures files local_census_records import] }
+
+  before do
+    admin = create(:administrator)
+    login_as(admin.user)
+  end
+
+  describe "New" do
+    scenario "Should show import form" do
+      visit new_admin_local_census_records_import_path
+
+      expect(page).to have_field("local_census_records_import_file", type: "file")
+    end
+  end
+
+  describe "Create" do
+    before { visit new_admin_local_census_records_import_path }
+
+    scenario "Should show success notice after successful import" do
+      within "form#new_local_census_records_import" do
+        path = base_files_path << "valid.csv"
+        file = File.join(Rails.root, *path)
+        attach_file("local_census_records_import_file", file)
+        click_button "Save"
+      end
+
+      expect(page).to have_content "Local census records import process executed successfully!"
+    end
+
+    scenario "Should show alert when file is not present" do
+      within "form#new_local_census_records_import" do
+        click_button "Save"
+      end
+
+      expect(page).to have_content "can't be blank"
+    end
+
+    scenario "Should show alert when file is not supported" do
+      within "form#new_local_census_records_import" do
+        path = ["spec", "fixtures", "files", "clippy.jpg"]
+        file = File.join(Rails.root, *path)
+        attach_file("local_census_records_import_file", file)
+        click_button "Save"
+      end
+
+      expect(page).to have_content "Given file format is wrong. The allowed file format is: csv."
+    end
+
+    scenario "Should show successfully created local census records at created group" do
+      within "form#new_local_census_records_import" do
+        path = base_files_path << "valid.csv"
+        file = File.join(Rails.root, *path)
+        attach_file("local_census_records_import_file", file)
+        click_button "Save"
+      end
+
+      expect(page).to have_content "Created records (4)"
+      expect(page).to have_selector("#created-local-census-records tbody tr", count: 4)
+    end
+
+    scenario "Should show invalid local census records at errored group" do
+      within "form#new_local_census_records_import" do
+        path = base_files_path << "invalid.csv"
+        file = File.join(Rails.root, *path)
+        attach_file("local_census_records_import_file", file)
+        click_button "Save"
+      end
+
+      expect(page).to have_content "Errored rows (5)"
+      expect(page).to have_selector("#invalid-local-census-records tbody tr", count: 5)
+    end
+
+    scenario "Should show error messages inside cells at errored group" do
+      within "form#new_local_census_records_import" do
+        path = base_files_path << "invalid.csv"
+        file = File.join(Rails.root, *path)
+        attach_file("local_census_records_import_file", file)
+        click_button "Save"
+      end
+      rows = all("#invalid-local-census-records tbody tr")
+      expect(rows[0]).to have_content("can't be blank")
+      expect(rows[1]).to have_content("can't be blank")
+      expect(rows[2]).to have_content("can't be blank")
+      expect(rows[3]).to have_content("can't be blank")
+    end
+  end
+end