Enhance Uninstall and resolve conflict sets

Compute a minimum conflict set over the uninstall.

Adds also tests for specific cases covered by Uninstall now

pkg/package/package_test.go

@@ -0,0 +1,39 @@
+// Copyright © 2019 Ettore Di Giacinto <mudler@gentoo.org>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// 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, see <http://www.gnu.org/licenses/>.
+
+package pkg_test
+
+import (
+	. "github.com/mudler/luet/pkg/package"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Package", func() {
+	Context("Simple package", func() {
+		a := NewPackage("A", ">=1.0", []*DefaultPackage{}, []*DefaultPackage{})
+		a1 := NewPackage("A", "1.0", []*DefaultPackage{}, []*DefaultPackage{})
+		a11 := NewPackage("A", "1.1", []*DefaultPackage{}, []*DefaultPackage{})
+		a01 := NewPackage("A", "0.1", []*DefaultPackage{}, []*DefaultPackage{})
+		It("Expands correctly", func() {
+			lst, err := a.Expand([]Package{a1, a11, a01})
+			Expect(err).ToNot(HaveOccurred())
+			Expect(lst).To(ContainElement(a11))
+			Expect(lst).To(ContainElement(a1))
+			Expect(lst).ToNot(ContainElement(a01))
+			Expect(len(lst)).To(Equal(2))
+		})
+	})
+})