pdf.js/test/unit/unicode_spec.js
Tim van der Meij e08fd5e389
Implement a unit test for getCharUnicodeCategory in src/core/unicode.js (PR 14428 follow-up)
Given that the other functions in this file are already covered by unit
tests, we should also cover this newly added function.
2022-01-16 15:18:05 +01:00

173 lines
5.4 KiB
JavaScript

/* Copyright 2017 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import {
getCharUnicodeCategory,
getNormalizedUnicodes,
getUnicodeForGlyph,
getUnicodeRangeFor,
mapSpecialUnicodeValues,
reverseIfRtl,
} from "../../src/core/unicode.js";
import {
getDingbatsGlyphsUnicode,
getGlyphsUnicode,
} from "../../src/core/glyphlist.js";
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("getCharUnicodeCategory", function () {
it("should correctly determine the character category", function () {
const tests = {
// Whitespace
" ": { isDiacritic: false, isWhitespace: true },
"\t": { isDiacritic: false, isWhitespace: true },
"\u2001": { isDiacritic: false, isWhitespace: true },
"\uFEFF": { isDiacritic: false, isWhitespace: true },
// Diacritic
"\u0302": { isDiacritic: true, isWhitespace: false },
"\u0344": { isDiacritic: true, isWhitespace: false },
"\u0361": { isDiacritic: true, isWhitespace: false },
// No whitespace or diacritic
a: { isDiacritic: false, isWhitespace: false },
1: { isDiacritic: false, isWhitespace: false },
};
for (const [character, expectation] of Object.entries(tests)) {
expect(getCharUnicodeCategory(character)).toEqual(expectation);
}
});
});
describe("getUnicodeForGlyph", function () {
let standardMap, dingbatsMap;
beforeAll(function () {
standardMap = getGlyphsUnicode();
dingbatsMap = getDingbatsGlyphsUnicode();
});
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 () {
let NormalizedUnicodes;
beforeAll(function () {
NormalizedUnicodes = getNormalizedUnicodes();
});
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 () {
let NormalizedUnicodes;
function getGlyphUnicode(char) {
if (NormalizedUnicodes[char] !== undefined) {
return NormalizedUnicodes[char];
}
return char;
}
beforeAll(function () {
NormalizedUnicodes = getNormalizedUnicodes();
});
afterAll(function () {
NormalizedUnicodes = null;
});
it("should not reverse LTR characters", function () {
const A = getGlyphUnicode("A");
expect(reverseIfRtl(A)).toEqual("A");
const fi = getGlyphUnicode("\uFB01");
expect(reverseIfRtl(fi)).toEqual("fi");
});
it("should reverse RTL characters", function () {
// Hebrew (no-op, since it's not a combined character)
const heAlef = getGlyphUnicode("\u05D0");
expect(reverseIfRtl(heAlef)).toEqual("\u05D0");
// Arabic
const arAlef = getGlyphUnicode("\u0675");
expect(reverseIfRtl(arAlef)).toEqual("\u0674\u0627");
});
});
});