brew/Library/Homebrew/test/dependency_spec.rb

require "dependency"

RSpec::Matchers.alias_matcher :be_a_build_dependency, :be_build
RSpec::Matchers.alias_matcher :be_a_runtime_dependency, :be_run

describe Dependency do
  describe "::new" do
    it "accepts a single tag" do
      dep = described_class.new("foo", %w[bar])
      expect(dep.tags).to eq(%w[bar])
    end

    it "accepts multiple tags" do
      dep = described_class.new("foo", %w[bar baz])
      expect(dep.tags.sort).to eq(%w[bar baz].sort)
    end

    it "preserves symbol tags" do
      dep = described_class.new("foo", [:build])
      expect(dep.tags).to eq([:build])
    end

    it "accepts symbol and string tags" do
      dep = described_class.new("foo", [:build, "bar"])
      expect(dep.tags).to eq([:build, "bar"])
    end
  end

  describe "::merge_repeats" do
    it "merges duplicate dependencies" do
      dep = described_class.new("foo", [:build], nil, "foo")
      dep2 = described_class.new("foo", ["bar"], nil, "foo2")
      dep3 = described_class.new("xyz", ["abc"], nil, "foo")
      merged = described_class.merge_repeats([dep, dep2, dep3])
      expect(merged.count).to eq(2)
      expect(merged.first).to be_a described_class

      foo_named_dep = merged.find { |d| d.name == "foo" }
      expect(foo_named_dep.tags).to eq(["bar"])
      expect(foo_named_dep.option_names).to include("foo")
      expect(foo_named_dep.option_names).to include("foo2")

      xyz_named_dep = merged.find { |d| d.name == "xyz" }
      expect(xyz_named_dep.tags).to eq(["abc"])
      expect(xyz_named_dep.option_names).to include("foo")
      expect(xyz_named_dep.option_names).not_to include("foo2")
    end

    it "merges necessity tags" do
      required_dep = described_class.new("foo")
      recommended_dep = described_class.new("foo", [:recommended])
      optional_dep = described_class.new("foo", [:optional])

      deps = described_class.merge_repeats([required_dep, recommended_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).to be_required
      expect(deps.first).not_to be_recommended
      expect(deps.first).not_to be_optional

      deps = described_class.merge_repeats([required_dep, optional_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).to be_required
      expect(deps.first).not_to be_recommended
      expect(deps.first).not_to be_optional

      deps = described_class.merge_repeats([recommended_dep, optional_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).not_to be_required
      expect(deps.first).to be_recommended
      expect(deps.first).not_to be_optional
    end

    it "merges temporality tags" do
      normal_dep = described_class.new("foo")
      build_dep = described_class.new("foo", [:build])
      run_dep = described_class.new("foo", [:run])

      deps = described_class.merge_repeats([normal_dep, build_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).not_to be_a_build_dependency
      expect(deps.first).not_to be_a_runtime_dependency

      deps = described_class.merge_repeats([normal_dep, run_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).not_to be_a_build_dependency
      expect(deps.first).not_to be_a_runtime_dependency

      deps = described_class.merge_repeats([build_dep, run_dep])
      expect(deps.count).to eq(1)
      expect(deps.first).not_to be_a_build_dependency
      expect(deps.first).not_to be_a_runtime_dependency
    end
  end

  specify "equality" do
    foo1 = described_class.new("foo")
    foo2 = described_class.new("foo")
    expect(foo1).to eq(foo2)
    expect(foo1).to eql(foo2)

    bar = described_class.new("bar")
    expect(foo1).not_to eq(bar)
    expect(foo1).not_to eql(bar)

    foo3 = described_class.new("foo", [:build])
    expect(foo1).not_to eq(foo3)
    expect(foo1).not_to eql(foo3)
  end
end

describe TapDependency do
  subject { described_class.new("foo/bar/dog") }

  specify "#tap" do
    expect(subject.tap).to eq(Tap.new("foo", "bar"))
  end

  specify "#option_names" do
    expect(subject.option_names).to eq(%w[dog])
  end
end