Data exports (#2517)

* Import / export UI

* Data exports

* Lint fixes, brakeman update

test/controllers/family_exports_controller_test.rb

@@ -0,0 +1,73 @@
+require "test_helper"
+
+class FamilyExportsControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    @admin = users(:family_admin)
+    @non_admin = users(:family_member)
+    @family = @admin.family
+
+    sign_in @admin
+  end
+
+  test "non-admin cannot access exports" do
+    sign_in @non_admin
+
+    get new_family_export_path
+    assert_redirected_to root_path
+
+    post family_exports_path
+    assert_redirected_to root_path
+
+    get family_exports_path
+    assert_redirected_to root_path
+  end
+
+  test "admin can view export modal" do
+    get new_family_export_path
+    assert_response :success
+    assert_select "h2", text: "Export your data"
+  end
+
+  test "admin can create export" do
+    assert_enqueued_with(job: FamilyDataExportJob) do
+      post family_exports_path
+    end
+
+    assert_redirected_to settings_profile_path
+    assert_equal "Export started. You'll be able to download it shortly.", flash[:notice]
+
+    export = @family.family_exports.last
+    assert_equal "pending", export.status
+  end
+
+  test "admin can view export list" do
+    export1 = @family.family_exports.create!(status: "completed")
+    export2 = @family.family_exports.create!(status: "processing")
+
+    get family_exports_path
+    assert_response :success
+
+    assert_match export1.filename, response.body
+    assert_match "Exporting...", response.body
+  end
+
+  test "admin can download completed export" do
+    export = @family.family_exports.create!(status: "completed")
+    export.export_file.attach(
+      io: StringIO.new("test zip content"),
+      filename: "test.zip",
+      content_type: "application/zip"
+    )
+
+    get download_family_export_path(export)
+    assert_redirected_to(/rails\/active_storage/)
+  end
+
+  test "cannot download incomplete export" do
+    export = @family.family_exports.create!(status: "processing")
+
+    get download_family_export_path(export)
+    assert_redirected_to settings_profile_path
+    assert_equal "Export not ready for download", flash[:alert]
+  end
+end