1 files changed, 53 insertions, 0 deletions
diff --git a/activestorage/test/models/attachment_test.rb b/activestorage/test/models/attachment_test.rb
new file mode 100644
index 0000000000..94f354d116
--- /dev/null
+++ b/activestorage/test/models/attachment_test.rb
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require "test_helper"
+require "database/setup"
+
+class ActiveStorage::AttachmentTest < ActiveSupport::TestCase
+  include ActiveJob::TestHelper
+
+  setup do
+    @user = User.create!(name: "Josh")
+  end
+
+  teardown { ActiveStorage::Blob.all.each(&:delete) }
+
+  test "analyzing a directly-uploaded blob after attaching it" do
+    blob = directly_upload_file_blob(filename: "racecar.jpg")
+    assert_not blob.analyzed?
+
+    perform_enqueued_jobs do
+      @user.highlights.attach(blob)
+    end
+
+    assert blob.reload.analyzed?
+    assert_equal 4104, blob.metadata[:width]
+    assert_equal 2736, blob.metadata[:height]
+  end
+
+  test "mirroring a directly-uploaded blob after attaching it" do
+    previous_service, ActiveStorage::Blob.service = ActiveStorage::Blob.service, build_mirror_service
+
+    blob = directly_upload_file_blob
+    assert_not ActiveStorage::Blob.service.mirrors.second.exist?(blob.key)
+
+    perform_enqueued_jobs do
+      @user.highlights.attach(blob)
+    end
+
+    assert ActiveStorage::Blob.service.mirrors.second.exist?(blob.key)
+  ensure
+    ActiveStorage::Blob.service = previous_service
+  end
+
+  private
+    def build_mirror_service
+      ActiveStorage::Service::MirrorService.new \
+        primary: build_disk_service("primary"),
+        mirrors: 3.times.collect { |i| build_disk_service("mirror_#{i + 1}") }
+    end
+
+    def build_disk_service(purpose)
+      ActiveStorage::Service::DiskService.new(root: Dir.mktmpdir("active_storage_tests_#{purpose}"))
+    end
+end