```ruby
require 'spec_helper'

describe Hbc::Artifact::Binary do
  let(:cask) {
    Hbc.load('with-binary').tap do |cask|
      shutup do
        InstallHelper::install_without_artifacts(cask)
      end
    end
  }
  let(:expected_path) {
    Hbc.binarydir.join('binary')
  }
  after(:each) {
    if expected_path.exist?
      FileUtils.rm expected_path
    end
  }

  it "links the binary to the proper directory" do
    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end
    expect(FileHelper.valid_alias?(expected_path)).to be true
  end

  it "avoids clobbering an existing binary by linking over it" do
    FileUtils.touch expected_path

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(expected_path).to_not be :symlink?
  end

  it "clobbers an existing symlink" do
    expected_path.make_symlink('/tmp')

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(File.readlink(expected_path)).not_to eq('/tmp')
  end

  it "respects --no-binaries flag" do
    Hbc.no_binaries = true

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(expected_path.exist?).to be false

    Hbc.no_binaries = false
  end
end
```

Add test for creating binarydir if it doesn't exist
user
```ruby
require 'spec_helper'

describe Hbc::Artifact::Binary do
  let(:cask) {
    Hbc.load('with-binary').tap do |cask|
      shutup do
        InstallHelper::install_without_artifacts(cask)
      end
    end
  }
  let(:expected_path) {
    Hbc.binarydir.join('binary')
  }
  after(:each) {
    if expected_path.exist?
      FileUtils.rm expected_path
    end
  }

  it "links the binary to the proper directory" do
    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end
    expect(FileHelper.valid_alias?(expected_path)).to be true
  end

  it "avoids clobbering an existing binary by linking over it" do
    FileUtils.touch expected_path

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(expected_path).to_not be :symlink?
  end

  it "clobbers an existing symlink" do
    expected_path.make_symlink('/tmp')

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(File.readlink(expected_path)).not_to eq('/tmp')
  end

  it "respects --no-binaries flag" do
    Hbc.no_binaries = true

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(expected_path.exist?).to be false

    Hbc.no_binaries = false
  end

  it "creates parent directory if it doesn't exist" do
    FileUtils.rmdir Hbc.binarydir

    shutup do
      Hbc::Artifact::Binary.new(cask).install_phase
    end

    expect(expected_path.exist?).to be true
  end
end
```
assistant