pdf.js/test/unit/unicode_spec.js

/* globals describe, it, expect, beforeAll, afterAll, mapSpecialUnicodeValues,
           getUnicodeForGlyph, getGlyphsUnicode, getDingbatsGlyphsUnicode,
           getUnicodeRangeFor, getNormalizedUnicodes, reverseIfRtl */

'use strict';

describe('unicode', function () {
  describe('mapSpecialUnicodeValues', function () {
    it('should not re-map normal Unicode values', function () {
      // A
      expect(mapSpecialUnicodeValues(0x0041)).toEqual(0x0041);
      // fi
      expect(mapSpecialUnicodeValues(0xFB01)).toEqual(0xFB01);
    });

    it('should re-map special Unicode values', function () {
      // copyrightsans => copyright
      expect(mapSpecialUnicodeValues(0xF8E9)).toEqual(0x00A9);
      // Private Use Area characters
      expect(mapSpecialUnicodeValues(0xFFFF)).toEqual(0);
    });
  });

  describe('getUnicodeForGlyph', function () {
    var standardMap, dingbatsMap;

    beforeAll(function (done) {
      standardMap = getGlyphsUnicode();
      dingbatsMap = getDingbatsGlyphsUnicode();
      done();
    });

    afterAll(function () {
      standardMap = dingbatsMap = null;
    });

    it('should get Unicode values for valid glyph names', function () {
      expect(getUnicodeForGlyph('A', standardMap)).toEqual(0x0041);
      expect(getUnicodeForGlyph('a1', dingbatsMap)).toEqual(0x2701);
    });

    it('should recover Unicode values from uniXXXX/uXXXX{XX} glyph names',
        function () {
      expect(getUnicodeForGlyph('uni0041', standardMap)).toEqual(0x0041);
      expect(getUnicodeForGlyph('u0041', standardMap)).toEqual(0x0041);

      expect(getUnicodeForGlyph('uni2701', dingbatsMap)).toEqual(0x2701);
      expect(getUnicodeForGlyph('u2701', dingbatsMap)).toEqual(0x2701);
    });

    it('should not get Unicode values for invalid glyph names', function () {
      expect(getUnicodeForGlyph('Qwerty', standardMap)).toEqual(-1);
      expect(getUnicodeForGlyph('Qwerty', dingbatsMap)).toEqual(-1);
    });
  });

  describe('getUnicodeRangeFor', function () {
    it('should get correct Unicode range', function () {
      // A (Basic Latin)
      expect(getUnicodeRangeFor(0x0041)).toEqual(0);
      // fi (Alphabetic Presentation Forms)
      expect(getUnicodeRangeFor(0xFB01)).toEqual(62);
    });

    it('should not get a Unicode range', function () {
      expect(getUnicodeRangeFor(0x05FF)).toEqual(-1);
    });
  });

  describe('getNormalizedUnicodes', function () {
    var NormalizedUnicodes;

    beforeAll(function (done) {
      NormalizedUnicodes = getNormalizedUnicodes();
      done();
    });

    afterAll(function () {
      NormalizedUnicodes = null;
    });

    it('should get normalized Unicode values for ligatures', function () {
      // fi => f + i
      expect(NormalizedUnicodes['\uFB01']).toEqual('fi');
      // Arabic
      expect(NormalizedUnicodes['\u0675']).toEqual('\u0627\u0674');
    });

    it('should not normalize standard characters', function () {
      expect(NormalizedUnicodes['A']).toEqual(undefined);
    });
  });

  describe('reverseIfRtl', function () {
    var NormalizedUnicodes;

    function getGlyphUnicode(char) {
      if (NormalizedUnicodes[char] !== undefined) {
        return NormalizedUnicodes[char];
      }
      return char;
    }

    beforeAll(function (done) {
      NormalizedUnicodes = getNormalizedUnicodes();
      done();
    });

    afterAll(function () {
      NormalizedUnicodes = null;
    });

    it('should not reverse LTR characters', function () {
      var A = getGlyphUnicode('A');
      expect(reverseIfRtl(A)).toEqual('A');

      var fi = getGlyphUnicode('\uFB01');
      expect(reverseIfRtl(fi)).toEqual('fi');
    });

    it('should reverse RTL characters', function () {
      // Hebrew (no-op, since it's not a combined character)
      var heAlef = getGlyphUnicode('\u05D0');
      expect(reverseIfRtl(heAlef)).toEqual('\u05D0');
      // Arabic
      var arAlef = getGlyphUnicode('\u0675');
      expect(reverseIfRtl(arAlef)).toEqual('\u0674\u0627');
    });
  });
});