brew/Library/Homebrew/test/missing_formula_spec.rb

require "missing_formula"

describe Homebrew::MissingFormula do
  describe "::reason" do
    subject { described_class.reason("gem") }

    it { is_expected.not_to be_nil }
  end

  describe "::blacklisted_reason" do
    matcher :blacklist do |name|
      match do |expected|
        expected.blacklisted_reason(name)
      end
    end

    it { is_expected.to blacklist("gem") }
    it { is_expected.to blacklist("latex") }
    it { is_expected.to blacklist("pip") }
    it { is_expected.to blacklist("pil") }
    it { is_expected.to blacklist("macruby") }
    it { is_expected.to blacklist("lzma") }
    it { is_expected.to blacklist("gtest") }
    it { is_expected.to blacklist("gmock") }
    it { is_expected.to blacklist("sshpass") }
    it { is_expected.to blacklist("gsutil") }
    it { is_expected.to blacklist("gfortran") }
    it { is_expected.to blacklist("play") }
    it { is_expected.to blacklist("haskell-platform") }
    it { is_expected.to blacklist("mysqldump-secure") }
    it { is_expected.to blacklist("ngrok") }
    it("blacklists Xcode", :needs_macos) { is_expected.to blacklist("xcode") }
  end

  describe "::tap_migration_reason" do
    subject { described_class.tap_migration_reason(formula) }

    before do
      Tap.clear_cache
      tap_path = Tap::TAP_DIRECTORY/"homebrew/homebrew-foo"
      tap_path.mkpath
      (tap_path/"tap_migrations.json").write <<~JSON
        { "migrated-formula": "homebrew/bar" }
      JSON
    end

    context "with a migrated formula" do
      let(:formula) { "migrated-formula" }

      it { is_expected.not_to be_nil }
    end

    context "with a missing formula" do
      let(:formula) { "missing-formula" }

      it { is_expected.to be_nil }
    end
  end

  describe "::deleted_reason" do
    subject { described_class.deleted_reason(formula, silent: true) }

    before do
      Tap.clear_cache
      tap_path = Tap::TAP_DIRECTORY/"homebrew/homebrew-foo"
      tap_path.mkpath
      (tap_path/"deleted-formula.rb").write "placeholder"
      ENV.delete "GIT_AUTHOR_DATE"
      ENV.delete "GIT_COMMITTER_DATE"

      tap_path.cd do
        system "git", "init"
        system "git", "add", "--all"
        system "git", "commit", "-m", "initial state"
        system "git", "rm", "deleted-formula.rb"
        system "git", "commit", "-m", "delete formula 'deleted-formula'"
      end
    end

    context "with a deleted formula" do
      let(:formula) { "homebrew/foo/deleted-formula" }

      it { is_expected.not_to be_nil }
    end

    context "with a formula that never existed" do
      let(:formula) { "homebrew/foo/missing-formula" }

      it { is_expected.to be_nil }
    end
  end

  describe "::cask_reason", :cask do
    subject { described_class.cask_reason(formula, show_info: show_info) }

    context "with a formula name that is a cask and show_info: false" do
      let(:formula) { "local-caffeine" }
      let(:show_info) { false }

      it { is_expected.to match(/Found a cask named "local-caffeine" instead./) }
    end

    context "with a formula name that is a cask and show_info: true" do
      let(:formula) { "local-caffeine" }
      let(:show_info) { true }

      it { is_expected.to match(/Found a cask named "local-caffeine" instead.\nlocal-caffeine: 1.2.3\n/) }
    end

    context "with a formula name that is not a cask" do
      let(:formula) { "missing-formula" }
      let(:show_info) { false }

      it { is_expected.to be_nil }
    end
  end
end