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Handle case when no packages are installed in the system, and add test for it

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This commit is contained in:
Ettore Di Giacinto
2019-06-04 22:05:52 +02:00
parent 39a3e433a7
commit 2b095601eb
2 changed files with 25 additions and 0 deletions
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4
pkg/solver/solver.go
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@@ -82,6 +82,10 @@ func (s *Solver) BuildFormula() (bf.Formula, error) {
return nil, err
}
W := bf.Var(encodedW)
if len(s.Installed) == 0 {
formulas = append(formulas, bf.And(bf.True, W))
continue
}
for _, installed := range s.Installed {
encodedI, err := installed.IsFlagged(true).Encode()
if err != nil {

21
pkg/solver/solver_test.go
View File

@@ -38,6 +38,7 @@ var _ = Describe("Solver", func() {
Expect(solution).To(ContainElement(PackageAssert{Package: A.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: B.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: C.IsFlagged(true), Value: true}))
Expect(len(solution)).To(Equal(3))
})
It("Solves correctly more complex ones", func() {
C := pkg.NewPackage("C", "", []*pkg.DefaultPackage{}, []*pkg.DefaultPackage{})
@@ -52,6 +53,26 @@ var _ = Describe("Solver", func() {
Expect(solution).To(ContainElement(PackageAssert{Package: A.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: B.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: D.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: C.IsFlagged(true), Value: true}))
Expect(len(solution)).To(Equal(4))
Expect(err).ToNot(HaveOccurred())
})
It("Solves correctly more complex ones", func() {
// E := pkg.NewPackage("E", "", []*pkg.DefaultPackage{}, []*pkg.DefaultPackage{})
C := pkg.NewPackage("C", "", []*pkg.DefaultPackage{}, []*pkg.DefaultPackage{})
D := pkg.NewPackage("D", "", []*pkg.DefaultPackage{}, []*pkg.DefaultPackage{})
B := pkg.NewPackage("B", "", []*pkg.DefaultPackage{D}, []*pkg.DefaultPackage{})
A := pkg.NewPackage("A", "", []*pkg.DefaultPackage{B}, []*pkg.DefaultPackage{})
s := NewSolver([]pkg.Package{A}, []pkg.Package{}, []pkg.Package{A, B, C, D})
solution, err := s.Solve()
Expect(solution).To(ContainElement(PackageAssert{Package: A.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: B.IsFlagged(true), Value: true}))
Expect(solution).To(ContainElement(PackageAssert{Package: D.IsFlagged(true), Value: true}))
Expect(len(solution)).To(Equal(3))
Expect(err).ToNot(HaveOccurred())
})