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# frozen_string_literal: true
require 'spec_helper'
require 'ttfunk/ttf_encoder'
require 'ttfunk/subset'
RSpec.describe TTFunk::TTFEncoder do
let(:original_font_path) { test_font('DejaVuSans') }
let(:original) { TTFunk::File.open(original_font_path) }
let(:encoder_options) { {} }
let(:encoder) do
subset =
TTFunk::Subset::Unicode.new(original).tap do |sub_set|
# ASCII lowercase
(97..122).each { |char| sub_set.use(char) }
end
described_class.new(original, subset, encoder_options)
end
describe '#encode' do
subject(:encoded_ttf) { encoder.encode }
let(:new_font) { TTFunk::File.open(StringIO.new(encoded_ttf)) }
it 'includes all supported tables' do
expect(new_font.directory.tables).to include('cmap')
expect(new_font.directory.tables).to include('glyf')
expect(new_font.directory.tables).to include('loca')
expect(new_font.directory.tables).to include('hmtx')
expect(new_font.directory.tables).to include('hhea')
expect(new_font.directory.tables).to include('maxp')
expect(new_font.directory.tables).to include('OS/2')
expect(new_font.directory.tables).to include('post')
expect(new_font.directory.tables).to include('name')
expect(new_font.directory.tables).to include('head')
expect(new_font.directory.tables).to include('prep')
expect(new_font.directory.tables).to include('fpgm')
expect(new_font.directory.tables).to include('cvt ')
end
context 'when asked to encode the kern table' do
let(:encoder_options) { { kerning: true } }
it 'includes the kern table' do
expect(new_font.directory.tables).to include('kern')
end
end
it 'lists tables in optimal order' do
tables = described_class::OPTIMAL_TABLE_ORDER &
new_font.directory.tables.keys
tables.each_cons(2) do |first_table, second_table|
expect(new_font.directory.tables[first_table][:offset]).to(
be < new_font.directory.tables[second_table][:offset],
)
end
end
it 'is checksummed correctly' do
head_offset = new_font.directory.tables['head'][:offset]
checksum = encoded_ttf[head_offset + 8, 4].unpack1('N')
# verified via the Font-Validator tool at:
# https://github.com/HinTak/Font-Validator
expect(checksum).to eq(0xEEAE9DCF)
end
end
end
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