Unit test for UI part of the extension checker

library/general/test/ui/ui_extension_checker_test.rb

@@ -0,0 +1,91 @@
+#! /usr/bin/env rspec
+
+require_relative "../test_helper"
+require "ui/ui_extension_checker.rb"
+
+describe Yast::UIExtensionChecker do
+  describe "#new" do
+    let(:ui) { "qt" }
+    let(:ext) { "pkg" }
+    let(:ext_plugin) { "/my/yui/libyui-qt-pkg-42" }
+    let(:ext_pkg) { "libyui-qt-pkg42" }
+    let(:ui_plugin_info) do
+      instance_double(Yast::UIPluginInfo,
+        main_ui_plugin:               ui,
+        ui_extension_plugin_complete: ext_plugin,
+        ui_extension_pkg:             ext_pkg)
+    end
+    subject { described_class.new(ext) }
+
+    before do
+      allow(Yast::UIPluginInfo).to receive(:new).and_return(ui_plugin_info)
+      allow(File).to receive(:exist?).and_return(plugin_found)
+    end
+
+    context "extension plug-in binary found" do
+      let(:plugin_found) { true }
+
+      it "no pop-up is opened, and it reports ok" do
+        expect(Yast::Popup).not_to receive(:ContinueCancel)
+        expect(Yast::Report).not_to receive(:Error)
+        expect(subject.ok?).to be true
+      end
+    end
+
+    context "extension plug-in binary not found" do
+      let(:confirm?) { false }
+      let(:plugin_found) { false }
+      before do
+        allow(Yast::Popup).to receive(:ContinueCancel).and_return(confirm?)
+      end
+
+      it "opens a pop-up to ask if the package should be installed" do
+        expect(Yast::Popup).to receive(:ContinueCancel).with(/package.*install/)
+        subject
+      end
+
+      context "and the user does not confirm to install the package" do
+        it "reports not ok" do
+          expect(subject.ok?).to be false
+        end
+      end
+
+      context "and the confirms to install the package" do
+        let(:confirm?) { true }
+        let(:pkg_install_ok?) { true }
+        before do
+          allow(Yast::Package).to receive(:DoInstall).and_return(pkg_install_ok?)
+        end
+
+        it "installs the package and reports ok if it could be installed" do
+          expect(Yast::Package).to receive(:DoInstall).and_return(true)
+          expect(subject.ok?).to be true
+        end
+
+        context "the package could not be installed" do
+          let(:pkg_install_ok?) { false }
+          before do
+            allow(Yast::Report).to receive(:Error)
+          end
+
+          it "reports an error" do
+            expect(Yast::Report).to receive(:Error).with(/could not be installed/)
+            expect(subject.ok?).to be false
+          end
+        end
+      end
+
+      context "UI extension not available" do
+        let(:ext) { "foo" }
+        before do
+          allow(Yast::Report).to receive(:Error)
+        end
+
+        it "reports an error" do
+          expect(Yast::Report).to receive(:Error).with(/not available/)
+          expect(subject.ok?).to be false
+        end
+      end
+    end
+  end
+end