Spec image upload

The use of AWS S3 was untested before and it failed after upgrading to
Ruby 3.

spec/models/spree/image_spec.rb

@@ -0,0 +1,74 @@
+# frozen_string_literal: false
+
+require 'spec_helper'
+
+module Spree
+  describe Image do
+    include FileHelper
+
+    let(:file) { Rack::Test::UploadedFile.new(black_logo_file, 'image/png') }
+    let(:product) { create(:product) }
+
+    describe "using local storage" do
+      it "stores a new image" do
+        image = Spree::Image.create!(
+          attachment: file,
+          viewable: product.master,
+        )
+
+        attachment = image.attachment
+        expect(attachment.exists?).to eq true
+        expect(attachment.file?).to eq true
+        expect(attachment.url).to match /logo-black\.png\?[0-9]+$/
+      end
+    end
+
+    describe "using AWS S3" do
+      let(:s3_config) {
+        {
+          url: ":s3_alias_url",
+          storage: :s3,
+          s3_credentials: {
+            access_key_id: "A...A",
+            secret_access_key: "H...H",
+          },
+          s3_headers: { "Cache-Control" => "max-age=31557600" },
+          bucket: "ofn",
+          s3_protocol: "https",
+          s3_host_alias: "ofn.s3.us-east-1.amazonaws.com",
+
+          # This is for easier testing:
+          path: "/:id/:style/:basename.:extension",
+        }
+      }
+      around do |example|
+        original_config = Spree::Image.attachment_definitions
+        test_config = original_config.dup
+        test_config[:attachment].merge!(s3_config)
+        Spree::Image.attachment_definitions = test_config
+
+        example.run
+
+        Spree::Image.attachment_definitions = original_config
+      end
+
+      it "saves a new image when none is present" do
+        pending "patch for aws-sdk to encode URIs"
+
+        stub_request(:put, %r"https://ofn.s3.amazonaws.com/[0-9]+/(original|mini|small|product|large)/logo-black.png").
+          to_return(status: 200, body: "", headers: {})
+        stub_request(:head, %r"https://ofn.s3.amazonaws.com/[0-9]+/product/logo-black.png").
+          to_return(status: 200, body: "", headers: {})
+        image = Spree::Image.create!(
+          attachment: file,
+          viewable: product.master,
+        )
+
+        attachment = image.attachment
+        expect(attachment.exists?).to eq true
+        expect(attachment.file?).to eq true
+        expect(attachment.url).to match /logo-black\.png\?[0-9]+$/
+      end
+    end
+  end
+end