Library/Homebrew/test/language/node_spec.rb


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require "language/node"

describe Language::Node do
  describe "#setup_npm_environment" do
    it "does nothing when npmrc exists" do
      expect(subject.setup_npm_environment).to be_nil
    end

    it "calls prepend_path when node formula exists and npmrc does not exist" do
      node = formula "node" do
        url "node-test"
      end
      stub_formula_loader(node)
      allow_any_instance_of(Pathname).to receive(:exist?).and_return(false)
      expect(ENV).to receive(:prepend_path)
      subject.setup_npm_environment
    end

    it "does not call prepend_path when node formula does not exist but npmrc exists" do
      allow_any_instance_of(Pathname).to receive(:exist?).and_return(false)
      expect(subject.setup_npm_environment).to be_nil
    end
  end

  describe "#std_npm_install_args" do
    npm_install_arg = "libexec"
    npm_pack_cmd = "npm pack -ddd --ignore-scripts"

    it "raises error with non zero exitstatus" do
      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("error msg")
      allow_any_instance_of(Process::Status).to receive(:exitstatus).and_return(42)
      allow_any_instance_of(nil::NilClass).to receive(:exitstatus).and_return(42)
      expect { subject.std_npm_install_args(npm_install_arg) }.to \
        raise_error("npm failed to pack #{Dir.pwd}")
    end

    it "raises error with empty npm pack output" do
      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("")
      expect { subject.std_npm_install_args(npm_install_arg) }.to \
        raise_error("npm failed to pack #{Dir.pwd}")
    end

    it "does not raise error with a zero exitstatus" do
      allow(Language::Node).to receive(:`).with(npm_pack_cmd).and_return("pack.tgz")
      allow_any_instance_of(Process::Status).to receive(:exitstatus).and_return(0)
      allow_any_instance_of(nil::NilClass).to receive(:exitstatus).and_return(0)
      resp = subject.std_npm_install_args(npm_install_arg)
      expect(resp).to include("--prefix=#{npm_install_arg}", "#{Dir.pwd}/pack.tgz")
    end
  end

  specify "#local_npm_install_args" do
    resp = subject.local_npm_install_args
    expect(resp).to include("-ddd", "--build-from-source")
  end
end