# coding: utf-8

require "spec_helper"

describe PDF::Reader::WidthCalculator::BuiltIn do
  it_behaves_like "a WidthCalculator duck type" do
    let!(:font) { double(:basefont => :Helvetica) }
    subject     { PDF::Reader::WidthCalculator::BuiltIn.new(font)}
  end
end

describe PDF::Reader::WidthCalculator::BuiltIn, "#initialize" do
  context "when the basefont is one of the 14 standard fonts" do
    let!(:font)        { double(:basefont => :Helvetica) }

    it "should initialize with no errors" do
      lambda {
        PDF::Reader::WidthCalculator::BuiltIn.new(font)
      }.should_not raise_error
    end
  end

  context "when the basefont is not one of the 14 standard fonts" do
    let!(:font)        { double(:basefont => :Foo) }

    it "should raise an error" do
      lambda {
        PDF::Reader::WidthCalculator::BuiltIn.new(font)
      }.should raise_error(ArgumentError)
    end
  end
end