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require "dependency"
describe Dependency do
def build_dep(name, tags = [], deps = [])
dep = described_class.new(name.to_s, tags)
allow(dep).to receive(:to_formula).and_return(double(deps: deps, name: name))
dep
end
let(:foo) { build_dep(:foo) }
let(:bar) { build_dep(:bar) }
let(:baz) { build_dep(:baz) }
let(:qux) { build_dep(:qux) }
let(:deps) { [foo, bar, baz, qux] }
let(:formula) { double(deps: deps, name: "f") }
describe "::expand" do
it "yields dependent and dependency pairs" do
i = 0
described_class.expand(formula) do |dependent, dep|
expect(dependent).to eq(formula)
expect(deps[i]).to eq(dep)
i += 1
end
end
it "returns the dependencies" do
expect(described_class.expand(formula)).to eq(deps)
end
it "prunes all when given a block with ::prune" do
expect(described_class.expand(formula) { described_class.prune }).to be_empty
end
it "can prune selectively" do
deps = described_class.expand(formula) do |_, dep|
described_class.prune if dep.name == "foo"
end
expect(deps).to eq([bar, baz, qux])
end
it "preserves dependency order" do
allow(foo).to receive(:to_formula).and_return(double(name: "f", deps: [qux, baz]))
expect(described_class.expand(formula)).to eq([qux, baz, foo, bar])
end
end
it "skips optionals by default" do
deps = [build_dep(:foo, [:optional]), bar, baz, qux]
f = double(deps: deps, build: double(with?: false), name: "f")
expect(described_class.expand(f)).to eq([bar, baz, qux])
end
it "keeps recommended dependencies by default" do
deps = [build_dep(:foo, [:recommended]), bar, baz, qux]
f = double(deps: deps, build: double(with?: true), name: "f")
expect(described_class.expand(f)).to eq(deps)
end
it "merges repeated dependencies with differing options" do
foo2 = build_dep(:foo, ["option"])
baz2 = build_dep(:baz, ["option"])
deps << foo2 << baz2
deps = [foo2, bar, baz2, qux]
deps.zip(described_class.expand(formula)) do |expected, actual|
expect(expected.tags).to eq(actual.tags)
expect(expected).to eq(actual)
end
end
it "merges dependencies and perserves env_proc" do
env_proc = double
dep = described_class.new("foo", [], env_proc)
allow(dep).to receive(:to_formula).and_return(double(deps: [], name: "foo"))
deps.replace([dep])
expect(described_class.expand(formula).first.env_proc).to eq(env_proc)
end
it "merges tags without duplicating them" do
foo2 = build_dep(:foo, ["option"])
foo3 = build_dep(:foo, ["option"])
deps << foo2 << foo3
expect(described_class.expand(formula).first.tags).to eq(%w[option])
end
it "skips parent but yields children with ::skip" do
f = double(
name: "f",
deps: [
build_dep(:foo, [], [bar, baz]),
build_dep(:foo, [], [baz]),
],
)
deps = described_class.expand(f) do |_dependent, dep|
described_class.skip if %w[foo qux].include? dep.name
end
expect(deps).to eq([bar, baz])
end
it "keeps dependency but prunes recursive dependencies with ::keep_but_prune_recursive_deps" do
foo = build_dep(:foo, [:build], bar)
baz = build_dep(:baz, [:build])
f = double(name: "f", deps: [foo, baz])
deps = described_class.expand(f) do |_dependent, dep|
described_class.keep_but_prune_recursive_deps if dep.build?
end
expect(deps).to eq([foo, baz])
end
it "returns only the dependencies given as a collection as second argument" do
expect(formula.deps).to eq([foo, bar, baz, qux])
expect(described_class.expand(formula, [bar, baz])).to eq([bar, baz])
end
it "doesn't raise an error when a dependency is cyclic" do
foo = build_dep(:foo)
bar = build_dep(:bar, [], [foo])
allow(foo).to receive(:to_formula).and_return(double(deps: [bar], name: foo.name))
f = double(name: "f", deps: [foo, bar])
expect { described_class.expand(f) }.not_to raise_error
end
it "cleans the expand stack" do
foo = build_dep(:foo)
allow(foo).to receive(:to_formula).and_raise(FormulaUnavailableError, foo.name)
f = double(name: "f", deps: [foo])
expect { described_class.expand(f) }.to raise_error(FormulaUnavailableError)
expect(described_class.instance_variable_get(:@expand_stack)).to be_empty
end
end
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