Enable release notes in welcome screen if available

src/lib/installation/clients/inst_complex_welcome.rb

@@ -28,6 +28,7 @@
 Yast.import "Console"
 Yast.import "FileUtils"
 Yast.import "GetInstArgs"
+Yast.import "InstData"
 Yast.import "InstShowInfo"
 Yast.import "Keyboard"
 Yast.import "Language"
@@ -61,6 +62,7 @@ def main
       textdomain "installation"
 
       Yast::Wizard.EnableAbortButton
+      show_release_notes
 
       loop do
         dialog_result = ::Installation::Dialogs::ComplexWelcome.run(
@@ -174,6 +176,12 @@ def retranslate_yast
       end
     end
 
+    # Show release notes if they have been downloaded
+    def show_release_notes
+      return if InstData.release_notes.empty?
+      Wizard.ShowReleaseNotesButton(_("Re&lease Notes..."), "rel_notes")
+    end
+
     # Return the list of base products
     #
     # @return [Array<Y2Packager::Product>] List of available base products

test/inst_complex_welcome_test.rb

@@ -97,9 +97,35 @@
     end
 
     it "runs the dialog" do
+      expect(Installation::Dialogs::ComplexWelcome).to receive(:run)
+        .and_return(:back)
       subject.main
     end
 
+    context "release notes" do
+      before do
+        allow(Yast::InstData).to receive(:release_notes).and_return(release_notes)
+      end
+
+      context "when release notes have been downloaded" do
+        let(:release_notes) { "release notes" }
+
+        it "show release notes" do
+          expect(Yast::Wizard).to receive(:ShowReleaseNotesButton)
+          subject.main
+        end
+      end
+
+      context "when release notes have not been downloaded" do
+        let(:release_notes) { "" }
+
+        it "does not download release notes again" do
+          expect(Yast::Wizard).to_not receive(:ShowReleaseNotesButton)
+          subject.main
+        end
+      end
+    end
+
     context "when back is pressed" do
       let(:dialog_results) { [:back] }