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require "pathname"
require "tmpdir"
require "support/fakefs"
require 'librarian/resolver'
require 'librarian/spec_change_set'
require 'librarian/mock'
module Librarian
describe Resolver do
include ::Support::FakeFS
let(:env) { Mock::Environment.new }
let(:resolver) { env.resolver }
context "a simple specfile" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.1'
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
dep 'butter'
end
end
let(:resolution) { resolver.resolve(spec) }
specify { expect(resolution).to be_correct }
end
context "a specfile with a dep from one src depending on a dep from another src" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.1'
end
source 'source-2' do
spec 'jam', '1.2' do
dependency 'butter', '>= 1.0'
end
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
src 'source-2' do
dep 'jam'
end
end
end
let(:resolution) { resolver.resolve(spec) }
specify { expect(resolution).to be_correct }
end
context "a specfile with a dep in multiple sources" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.0'
spec 'butter', '1.1'
end
source 'source-2' do
spec 'butter', '1.0'
spec 'butter', '1.1'
end
source 'source-3' do
spec 'butter', '1.0'
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
src 'source-2'
dep 'butter', '>= 1.1'
end
end
it "should have the expected number of sources" do
expect(spec.sources.size).to eq 2
end
let(:resolution) { resolver.resolve(spec) }
specify { expect(resolution).to be_correct }
it "should have the manifest from the final source with a matching manifest" do
manifest = resolution.manifests.find{|m| m.name == "butter"}
expect(manifest.source.name).to eq "source-2"
end
end
context "a specfile with a dep depending on a nonexistent dep" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'jam', '1.2' do
dependency 'butter', '>= 1.0'
end
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
dep 'jam'
end
end
let(:resolution) { resolver.resolve(spec) }
specify { expect(resolution).to be_nil }
end
context "a specfile with conflicting constraints" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.0'
spec 'butter', '1.1'
spec 'jam', '1.2' do
dependency 'butter', '1.1'
end
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
dep 'butter', '1.0'
dep 'jam'
end
end
let(:resolution) { resolver.resolve(spec) }
specify { expect(resolution).to be_nil }
end
context "a specfile with cyclic constraints" do
before do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.0' do
dependency 'jam', '2.0'
end
spec 'jam', '2.0' do
dependency 'butter', '1.0'
end
end
end
end
let(:spec) do
env.dsl do
src 'source-1'
dep 'butter'
end
end
let(:resolution) { resolver.resolve(spec) }
context "when cyclic resolutions are forbidden" do
let(:resolver) { env.resolver(:cyclic => false) }
specify { expect(resolution).to be_nil }
end
context "when cyclic resolutions are permitted" do
let(:resolver) { env.resolver(:cyclic => true) }
it "should have all the manifests" do
manifest_names = resolution.manifests.map(&:name).sort
expect(manifest_names).to be == %w[butter jam]
end
end
end
context "updating" do
it "should not work" do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.0'
spec 'butter', '1.1'
spec 'jam', '1.2' do
dependency 'butter'
end
end
end
first_spec = env.dsl do
src 'source-1'
dep 'butter', '1.1'
dep 'jam'
end
first_resolution = resolver.resolve(first_spec)
expect(first_resolution).to be_correct
first_manifests = first_resolution.manifests
first_manifests_index = Hash[first_manifests.map{|m| [m.name, m]}]
expect(first_manifests_index['butter'].version.to_s).to eq '1.1'
second_spec = env.dsl do
src 'source-1'
dep 'butter', '1.0'
dep 'jam'
end
locked_manifests = ManifestSet.deep_strip(first_manifests, ['butter'])
second_resolution =resolver.resolve(second_spec, locked_manifests)
expect(second_resolution).to be_correct
second_manifests = second_resolution.manifests
second_manifests_index = Hash[second_manifests.map{|m| [m.name, m]}]
expect(second_manifests_index['butter'].version.to_s).to eq '1.0'
end
end
context "a change to the spec" do
it "should work" do
env.registry :clear => true do
source 'source-1' do
spec 'butter', '1.0'
end
source 'source-2' do
spec 'butter', '1.0'
end
end
spec = env.dsl do
src 'source-1'
dep 'butter'
end
lock = resolver.resolve(spec)
expect(lock).to be_correct
spec = env.dsl do
src 'source-1'
dep 'butter', :src => 'source-2'
end
changes = SpecChangeSet.new(env, spec, lock)
expect(changes).to_not be_same
manifests = ManifestSet.new(changes.analyze).to_hash
expect(manifests).to_not have_key('butter')
lock = resolver.resolve(spec, changes.analyze)
expect(lock).to be_correct
expect(lock.manifests.map{|m| m.name}).to include('butter')
manifest = lock.manifests.find{|m| m.name == 'butter'}
expect(manifest).to_not be_nil
expect(manifest.source.name).to eq 'source-2'
end
end
context "a pathname to a simple specfile" do
let(:pwd) { Pathname(Dir.tmpdir) }
let(:specfile_path) { pwd + "Mockfile" }
before { FileUtils.mkpath(pwd) }
def write!(path, text)
Pathname(path).open("wb"){|f| f.write(text)}
end
it "loads the specfile with the __FILE__" do
write! specfile_path, "src __FILE__"
spec = env.dsl(specfile_path)
expect(spec.sources.size).to eq 1
source = spec.sources.first
expect(source.name).to eq specfile_path.to_s
end
end
end
end
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