Read products specification

* Add a ProductSpecReader#products method to get the products.

src/lib/y2packager/product_spec_reader.rb

@@ -17,6 +17,8 @@
 # To contact SUSE LLC about this file by physical or electronic mail, you may
 # find current contact information at www.suse.com.
 
+require "y2packager/product_spec_readers/full"
+require "y2packager/product_spec_readers/libzypp"
 require "y2packager/product_spec_readers/control"
 
 module Y2Packager
@@ -28,7 +30,29 @@ class ProductSpecReader
     #
     # @return [Y2Packager::ProductSpec] List of product specifications
     def products
-      Y2Packager::ProductSpecReaders::Control.new.products
+      products_from_control || products_from_offline || products_from_libzypp
+    end
+
+  private
+
+    def products_from_control
+      control_products = Y2Packager::ProductSpecReaders::Control.new.products
+      return nil if control_products.empty?
+
+      control_products
+    end
+
+    def products_from_offline
+      offline_products = Y2Packager::ProductSpecReaders::Full.new.products(
+        Yast::InstURL.installInf2Url("")
+      )
+      return nil if offline_products.empty?
+
+      offline_products
+    end
+
+    def products_from_libzypp
+      Y2Packager::ProductSpecReaders::Libzypp.new.products
     end
   end
 end

test/lib/product_spec_reader_test.rb

@@ -0,0 +1,70 @@
+# Copyright (c) [2021] SUSE LLC
+#
+# All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of version 2 of the GNU General Public License as published
+# by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, contact SUSE LLC.
+#
+# To contact SUSE LLC about this file by physical or electronic mail, you may
+# find current contact information at www.suse.com.
+
+require_relative "../test_helper"
+require "y2packager/product_spec_reader"
+
+describe Y2Packager::ProductSpecReader do
+  let(:reader) { described_class.new }
+
+  let(:full_reader) do
+    instance_double(Y2Packager::ProductSpecReaders::Full, products: full_products)
+  end
+
+  let(:control_reader) do
+    instance_double(Y2Packager::ProductSpecReaders::Control, products: control_products)
+  end
+
+  let(:libzypp_reader) do
+   instance_double(Y2Packager::ProductSpecReaders::Libzypp, products: libzypp_products)
+  end
+
+  let(:full_products) { [instance_double(Y2Packager::ProductSpec, name: "SLES")] }
+  let(:control_products) { [instance_double(Y2Packager::ProductSpec, name: "SLED")] }
+  let(:libzypp_products) { [instance_double(Y2Packager::ProductSpec, name: "SLE-HA")] }
+
+  describe "#products" do
+    before do
+      allow(Y2Packager::ProductSpecReaders::Full).to receive(:new).and_return(full_reader)
+      allow(Y2Packager::ProductSpecReaders::Control).to receive(:new).and_return(control_reader)
+      allow(Y2Packager::ProductSpecReaders::Libzypp).to receive(:new).and_return(libzypp_reader)
+    end
+
+    it "returns products from the control file" do
+      expect(reader.products).to eq(control_products)
+    end
+
+    context "when no online products are found" do
+      let(:control_products) { [] }
+
+      it "returns offline products" do
+        expect(reader.products).to eq(full_products)
+      end
+    end
+
+    context "when no online nor offline products are found" do
+      let(:full_products) { [] }
+      let(:control_products) { [] }
+
+      it "returns the libzypp products" do
+        expect(reader.products).to eq(libzypp_products)
+      end
+    end
+  end
+end