shared_examples_for "Rex::Encoder::NDR.wstring" do
  let(:string) { "ABCD" }

  it "encodes the argument as null-terminated unicode string" do
    is_expected.to include("A\x00B\x00C\x00D\x00\x00\x00")
  end

  it "starts encoding string metadata" do
    expect(subject.unpack("VVV")[0]).to eq(string.length + 1)
    expect(subject.unpack("VVV")[1]).to eq(0)
    expect(subject.unpack("VVV")[2]).to eq(string.length + 1)
  end

  it "ends with padding to make result length 32-bits aligned" do
    is_expected.to end_with("\x00" * 2)
    expect(subject.length).to eq(24)
  end
end