require "language/node"

describe Language::Node do
  describe "#setup_npm_environment" do
    it "calls prepend_path when node formula exists only during the first call" do
      node = formula "node" do
        url "node-test"
      end
      stub_formula_loader(node)
      expect(ENV).to receive(:prepend_path)
      subject.instance_variable_set(:@env_set, false)
      expect(subject.setup_npm_environment).to be_nil

      expect(subject.instance_variable_get(:@env_set)).to eq(true)
      expect(ENV).not_to receive(:prepend_path)
      expect(subject.setup_npm_environment).to be_nil
    end

    it "does not call prepend_path when node formula does not exist" do
      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 --ignore-scripts"

    it "raises error with non zero exitstatus" do
      allow(Utils).to receive(:popen_read).with(npm_pack_cmd).and_return(`false`)
      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(Utils).to receive(:popen_read).with(npm_pack_cmd).and_return(`true`)
      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(Utils).to receive(:popen_read).with(npm_pack_cmd).and_return(`echo pack.tgz`)
      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", "--cache=#{HOMEBREW_CACHE}/npm_cache")
  end
end