require 'rubygems/test_case' class TestGemResolver < Gem::TestCase def setup super @DR = Gem::Resolver end def make_dep(name, *req) Gem::Dependency.new(name, *req) end def set(*specs) StaticSet.new(specs) end def assert_resolves_to expected, resolver actual = resolver.resolve exp = expected.sort_by { |s| s.full_name } act = actual.map { |a| a.spec }.sort_by { |s| s.full_name } msg = "Set of gems was not the same: #{exp.map { |x| x.full_name}.inspect} != #{act.map { |x| x.full_name}.inspect}" assert_equal exp, act, msg rescue Gem::DependencyResolutionError => e flunk e.message end def test_self_compatibility assert_same Gem::Resolver, Gem::DependencyResolver end def test_self_compose_sets_multiple index_set = @DR::IndexSet.new vendor_set = @DR::VendorSet.new composed = @DR.compose_sets index_set, vendor_set assert_kind_of Gem::Resolver::ComposedSet, composed assert_equal [index_set, vendor_set], composed.sets end def test_self_compose_sets_nest index_set = @DR::IndexSet.new vendor_set = @DR::VendorSet.new inner = @DR.compose_sets index_set, vendor_set current_set = @DR::CurrentSet.new composed = @DR.compose_sets inner, current_set assert_kind_of Gem::Resolver::ComposedSet, composed assert_equal [index_set, vendor_set, current_set], composed.sets end def test_self_compose_sets_nil index_set = @DR::IndexSet.new composed = @DR.compose_sets index_set, nil assert_same index_set, composed e = assert_raises ArgumentError do @DR.compose_sets nil end assert_equal 'one set in the composition must be non-nil', e.message end def test_self_compose_sets_single index_set = @DR::IndexSet.new composed = @DR.compose_sets index_set assert_same index_set, composed end def test_handle_conflict a1 = util_spec 'a', 1 r1 = Gem::Resolver::DependencyRequest.new dep('a', '= 1'), nil r2 = Gem::Resolver::DependencyRequest.new dep('a', '= 2'), nil r3 = Gem::Resolver::DependencyRequest.new dep('a', '= 3'), nil existing = Gem::Resolver::ActivationRequest.new a1, r1, false res = Gem::Resolver.new [a1] res.handle_conflict r2, existing res.handle_conflict r2, existing res.handle_conflict r3, existing assert_equal 2, res.conflicts.length end def test_no_overlap_specificly a = util_spec "a", '1' b = util_spec "b", "1" ad = make_dep "a", "= 1" bd = make_dep "b", "= 1" deps = [ad, bd] s = set(a, b) res = Gem::Resolver.new(deps, s) assert_resolves_to [a, b], res end def test_pulls_in_dependencies a = util_spec "a", '1' b = util_spec "b", "1", "c" => "= 1" c = util_spec "c", "1" ad = make_dep "a", "= 1" bd = make_dep "b", "= 1" deps = [ad, bd] s = set(a, b, c) res = Gem::Resolver.new(deps, s) assert_resolves_to [a, b, c], res end def test_picks_highest_version a1 = util_spec "a", '1' a2 = util_spec "a", '2' s = set(a1, a2) ad = make_dep "a" res = Gem::Resolver.new([ad], s) assert_resolves_to [a2], res end def test_picks_best_platform is = Gem::Resolver::IndexSpecification unknown = Gem::Platform.new 'unknown' a2_p1 = a3_p2 = nil spec_fetcher do |fetcher| a2_p1 = fetcher.spec 'a', 2 do |s| s.platform = Gem::Platform.local end a3_p2 = fetcher.spec 'a', 3 do |s| s.platform = unknown end end v2 = v(2) v3 = v(3) source = Gem::Source.new @gem_repo s = set a2 = is.new s, 'a', v2, source, Gem::Platform::RUBY a2_p1 = is.new s, 'a', v2, source, Gem::Platform.local.to_s a3_p2 = is.new s, 'a', v3, source, unknown s.add a3_p2 s.add a2_p1 s.add a2 ad = make_dep "a" res = Gem::Resolver.new([ad], s) assert_resolves_to [a2_p1], res end def test_only_returns_spec_once a1 = util_spec "a", "1", "c" => "= 1" b1 = util_spec "b", "1", "c" => "= 1" c1 = util_spec "c", "1" ad = make_dep "a" bd = make_dep "b" s = set(a1, b1, c1) res = Gem::Resolver.new([ad, bd], s) assert_resolves_to [a1, b1, c1], res end def test_picks_lower_version_when_needed a1 = util_spec "a", "1", "c" => ">= 1" b1 = util_spec "b", "1", "c" => "= 1" c1 = util_spec "c", "1" c2 = util_spec "c", "2" ad = make_dep "a" bd = make_dep "b" s = set(a1, b1, c1, c2) res = Gem::Resolver.new([ad, bd], s) assert_resolves_to [a1, b1, c1], res end def test_conflict_resolution_only_effects_correct_spec a1 = util_spec "a", "1", "c" => ">= 1" b1 = util_spec "b", "1", "d" => ">= 1" d3 = util_spec "d", "3", "c" => "= 1" d4 = util_spec "d", "4", "c" => "= 1" c1 = util_spec "c", "1" c2 = util_spec "c", "2" ad = make_dep "a" bd = make_dep "b" s = set(a1, b1, d3, d4, c1, c2) res = Gem::Resolver.new([ad, bd], s) assert_resolves_to [a1, b1, c1, d4], res cons = res.conflicts assert_equal 1, cons.size con = cons.first assert_equal "c (= 1)", con.dependency.to_s assert_equal "c-2", con.activated.full_name end def test_raises_dependency_error a1 = util_spec "a", "1", "c" => "= 1" b1 = util_spec "b", "1", "c" => "= 2" c1 = util_spec "c", "1" c2 = util_spec "c", "2" ad = make_dep "a" bd = make_dep "b" s = set(a1, b1, c1, c2) r = Gem::Resolver.new([ad, bd], s) e = assert_raises Gem::DependencyResolutionError do r.resolve end deps = [make_dep("c", "= 1"), make_dep("c", "= 2")] assert_equal deps, e.conflicting_dependencies con = e.conflict act = con.activated assert_equal "c-2", act.spec.full_name parent = act.parent assert_equal "b-1", parent.spec.full_name act = con.requester assert_equal "a-1", act.spec.full_name end def test_raises_when_a_gem_is_missing ad = make_dep "a" r = Gem::Resolver.new([ad], set) e = assert_raises Gem::UnsatisfiableDepedencyError do r.resolve end assert_equal "Unable to resolve dependency: user requested 'a (>= 0)'", e.message assert_equal "a (>= 0)", e.dependency.to_s end def test_raises_when_a_gem_version_is_missing a1 = util_spec "a", "1" ad = make_dep "a", "= 3" r = Gem::Resolver.new([ad], set(a1)) e = assert_raises Gem::UnsatisfiableDepedencyError do r.resolve end assert_equal "a (= 3)", e.dependency.to_s end def test_raises_and_reports_a_toplevel_request_properly a1 = util_spec "a", "1" ad = make_dep "a", "= 3" r = Gem::Resolver.new([ad], set(a1)) e = assert_raises Gem::UnsatisfiableDepedencyError do r.resolve end assert_equal "Unable to resolve dependency: user requested 'a (= 3)'", e.message end def test_raises_and_reports_an_implicit_request_properly a1 = util_spec "a", "1" do |s| s.add_runtime_dependency 'b', '= 2' end ad = make_dep "a", "= 1" r = Gem::Resolver.new([ad], set(a1)) e = assert_raises Gem::UnsatisfiableDepedencyError do r.resolve end assert_equal "Unable to resolve dependency: 'a (= 1)' requires 'b (= 2)'", e.message end def test_raises_when_possibles_are_exhausted a1 = util_spec "a", "1", "c" => ">= 2" b1 = util_spec "b", "1", "c" => "= 1" c1 = util_spec "c", "1" c2 = util_spec "c", "2" c3 = util_spec "c", "3" s = set(a1, b1, c1, c2, c3) ad = make_dep "a" bd = make_dep "b" r = Gem::Resolver.new([ad, bd], s) e = assert_raises Gem::DependencyResolutionError do r.resolve end dependency = e.conflict.dependency assert_equal 'a', dependency.name assert_equal req('>= 0'), dependency.requirement activated = e.conflict.activated assert_equal 'c-1', activated.full_name assert_equal dep('c', '= 1'), activated.request.dependency assert_equal [dep('c', '>= 2'), dep('c', '= 1')], e.conflict.conflicting_dependencies end def test_keeps_resolving_after_seeing_satisfied_dep a1 = util_spec "a", "1", "b" => "= 1", "c" => "= 1" b1 = util_spec "b", "1" c1 = util_spec "c", "1" ad = make_dep "a" bd = make_dep "b" s = set(a1, b1, c1) r = Gem::Resolver.new([ad, bd], s) assert_resolves_to [a1, b1, c1], r end def test_common_rack_activation_scenario rack100 = util_spec "rack", "1.0.0" rack101 = util_spec "rack", "1.0.1" lib1 = util_spec "lib", "1", "rack" => ">= 1.0.1" rails = util_spec "rails", "3", "actionpack" => "= 3" ap = util_spec "actionpack", "3", "rack" => ">= 1.0.0" d1 = make_dep "rails" d2 = make_dep "lib" s = set(lib1, rails, ap, rack100, rack101) r = Gem::Resolver.new([d1, d2], s) assert_resolves_to [rails, ap, rack101, lib1], r # check it with the deps reverse too r = Gem::Resolver.new([d2, d1], s) assert_resolves_to [lib1, rack101, rails, ap], r end def test_backtracks_to_the_first_conflict a1 = util_spec "a", "1" a2 = util_spec "a", "2" a3 = util_spec "a", "3" a4 = util_spec "a", "4" d1 = make_dep "a" d2 = make_dep "a", ">= 2" d3 = make_dep "a", "= 1" s = set(a1, a2, a3, a4) r = Gem::Resolver.new([d1, d2, d3], s) assert_raises Gem::DependencyResolutionError do r.resolve end end def test_resolve_conflict a1 = util_spec 'a', 1 a2 = util_spec 'a', 2 b2 = util_spec 'b', 2, 'a' => '~> 2.0' s = set a1, a2, b2 a_dep = dep 'a', '~> 1.0' b_dep = dep 'b' r = Gem::Resolver.new [a_dep, b_dep], s assert_raises Gem::DependencyResolutionError do r.resolve end end def test_resolve_bug_699 a1 = util_spec 'a', '1', 'b' => '= 2', 'c' => '~> 1.0.3' b1 = util_spec 'b', '2', 'c' => '~> 1.0' c1 = util_spec 'c', '1.0.9' c2 = util_spec 'c', '1.1.0' c3 = util_spec 'c', '1.2.0' s = set a1, b1, c1, c2, c3 a_dep = dep 'a', '= 1' r = Gem::Resolver.new [a_dep], s assert_resolves_to [a1, b1, c1], r end def test_resolve_rollback a1 = util_spec 'a', 1 a2 = util_spec 'a', 2 b1 = util_spec 'b', 1, 'a' => '~> 1.0' b2 = util_spec 'b', 2, 'a' => '~> 2.0' s = set a1, a2, b1, b2 a_dep = dep 'a', '~> 1.0' b_dep = dep 'b' r = Gem::Resolver.new [a_dep, b_dep], s assert_resolves_to [a1, b1], r end # actionmailer 2.3.4 # activemerchant 1.5.0 # activesupport 2.3.5, 2.3.4 # Activemerchant needs activesupport >= 2.3.2. When you require activemerchant, it will activate the latest version that meets that requirement which is 2.3.5. Actionmailer on the other hand needs activesupport = 2.3.4. When rubygems tries to activate activesupport 2.3.4, it will raise an error. def test_simple_activesupport_problem sup1 = util_spec "activesupport", "2.3.4" sup2 = util_spec "activesupport", "2.3.5" merch = util_spec "activemerchant", "1.5.0", "activesupport" => ">= 2.3.2" mail = util_spec "actionmailer", "2.3.4", "activesupport" => "= 2.3.4" s = set(mail, merch, sup1, sup2) d1 = make_dep "activemerchant" d2 = make_dep "actionmailer" r = Gem::Resolver.new([d1, d2], s) assert_resolves_to [merch, mail, sup1], r end def test_second_level_backout b1 = new_spec "b", "1", { "c" => ">= 1" }, "lib/b.rb" b2 = new_spec "b", "2", { "c" => ">= 2" }, "lib/b.rb" c1 = new_spec "c", "1" c2 = new_spec "c", "2" d1 = new_spec "d", "1", { "c" => "< 2" }, "lib/d.rb" d2 = new_spec "d", "2", { "c" => "< 2" }, "lib/d.rb" s = set(b1, b2, c1, c2, d1, d2) p1 = make_dep "b", "> 0" p2 = make_dep "d", "> 0" r = Gem::Resolver.new([p1, p2], s) assert_resolves_to [b1, c1, d2], r end def test_select_local_platforms r = Gem::Resolver.new nil, nil a1 = util_spec 'a', 1 a1_p1 = util_spec 'a', 1 do |s| s.platform = Gem::Platform.local end a1_p2 = util_spec 'a', 1 do |s| s.platform = 'unknown' end selected = r.select_local_platforms [a1, a1_p1, a1_p2] assert_equal [a1, a1_p1], selected end def test_raises_and_explains_when_platform_prevents_install a1 = util_spec "a", "1" do |s| s.platform = Gem::Platform.new %w[c p 1] end ad = make_dep "a", "= 1" r = Gem::Resolver.new([ad], set(a1)) e = assert_raises Gem::UnsatisfiableDepedencyError do r.resolve end assert_match "No match for 'a (= 1)' on this platform. Found: c-p-1", e.message end end