spec/shared/properties_database_spec.rb

# encoding: UTF-8

# Copyright 2012 Twitter, Inc
# http://www.apache.org/licenses/LICENSE-2.0

require 'spec_helper'

require 'fileutils'
require 'securerandom'
require 'tmpdir'

describe TwitterCldr::Shared::PropertiesDatabase do
  context 'with an empty database' do
    let(:tmp_dir) do
      File.join(Dir.tmpdir, SecureRandom.hex)
    end

    let(:database) { described_class.new(tmp_dir) }

    before(:each) do
      FileUtils.mkdir_p(tmp_dir)
    end

    after(:each) do
      FileUtils.rm_rf(tmp_dir)
    end

    describe '#store' do
      it 'associates the code points with the property name/value' do
        database.store('foo', 'bar', TwitterCldr::Utils::RangeSet.new([1..4]))
        result = database.code_points_for_property('foo', 'bar')
        expect(result).to be_a(TwitterCldr::Utils::RangeSet)
        expect(result.to_a).to eq([1..4])
      end
    end
  end

  context 'with a full database of properties' do
    let(:database) { described_class.new }

    describe '#code_points_for_property' do
      it 'retrieves code points for the property name' do
        code_points = database.code_points_for_property('Math')
        [126, 172, 215, 1014, 9168, 10176].each do |cp|
          expect(code_points).to include(cp)
        end
      end

      it 'retrieves code points for the property name/value pair' do
        code_points = database.code_points_for_property('Age', '1.1')
        [501, 736, 890, 990, 1118, 1227, 1632].each do |cp|
          expect(code_points).to include(cp)
        end
      end

      it "returns an empty range set if the property name can't be found" do
        code_points = database.code_points_for_property('foo')
        expect(code_points.to_a).to eq([])
      end

      it "returns an empty range set if the property name/value pair can't be found" do
        code_points = database.code_points_for_property('Age', 'foo')
        expect(code_points.to_a).to eq([])
      end
    end

    describe '#include?' do
      it 'returns true if the database contains the property name' do
        expect(database.include?('Age')).to eq(true)
      end

      it 'returns true if the database contains the property name/value pair' do
        expect(database.include?('Age', '1.1')).to eq(true)
      end

      it "returns false if the database doesn't contain the property name" do
        expect(database.include?('foo')).to eq(false)
      end

      it "returns false if the database doesn't contain the property name/value pair" do
        expect(database.include?('Age', 'foo')).to eq(false)
      end
    end

    describe '#properties_for_code_point' do
      it 'returns a property set for the given code point' do
        property_set = database.properties_for_code_point(65)
        expect(property_set).to be_a(TwitterCldr::Shared::PropertySet)
        expect(property_set.general_category).to eq(Set.new(%w(L Lu)))
        expect(property_set.word_break).to eq(Set.new(%w(ALetter)))
      end
    end

    describe '#property_names' do
      it 'returns a list of all valid property names' do
        %w(Radical Script Hex_Digit Diacritic).each do |property_name|
          expect(database.property_names).to include(property_name)
        end
      end
    end

    describe '#property_values_for' do
      it 'returns a list of all valid values for a property name' do
        values = database.property_values_for('Script')
        %w(Cyrillic Latin Hangul Han Bengali Tagalog Yi).each do |script|
          expect(values).to include(script)
        end
      end

      it 'correctly expands value prefixes for General_Category' do
        values = database.property_values_for('General_Category')
        expect(values).to include('Cc')
        expect(values).to include('C')

        expect(values).to include('Lo')
        expect(values).to include('L')

        expect(values).to include('Pd')
        expect(values).to include('P')

        expect(values).to include('Sm')
        expect(values).to include('S')
      end
    end

    describe '#each_property_pair' do
      it 'yields each property name/value pair' do
        pairs = database.each_property_pair.to_a

        expected_pairs = [
          %w(Script Thai), ['Radical', nil],
          ['Math', nil], %w(Line_Break HY),
          %w(Jamo_Short_Name EU), ['Hyphen', nil]
        ]

        expected_pairs.each do |expected_pair|
          expect(pairs).to include(expected_pair)
        end
      end
    end

    describe '#normalize' do
      let(:property_name) { 'foo' }
      let(:property_value) { 'bar' }

      it 'delegates normalization to a normalizer' do
        normalizer = Object.new
        allow(database).to receive(:normalizer).and_return(normalizer)
        expect(normalizer).to receive(:normalize).with(property_name, property_value)
        database.normalize(property_name, property_value)
      end
    end
  end
end