pdfjs-dist/lib/test/unit/core_utils_spec.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2020 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.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

var _primitives = require("../../core/primitives.js");

var _core_utils = require("../../core/core_utils.js");

var _test_utils = require("./test_utils.js");

describe("core_utils", function () {
  describe("getInheritableProperty", function () {
    it("handles non-dictionary arguments", function () {
      expect((0, _core_utils.getInheritableProperty)({
        dict: null,
        key: "foo"
      })).toEqual(undefined);
      expect((0, _core_utils.getInheritableProperty)({
        dict: undefined,
        key: "foo"
      })).toEqual(undefined);
    });
    it("handles dictionaries that do not contain the property", function () {
      const emptyDict = new _primitives.Dict();
      expect((0, _core_utils.getInheritableProperty)({
        dict: emptyDict,
        key: "foo"
      })).toEqual(undefined);
      const filledDict = new _primitives.Dict();
      filledDict.set("bar", "baz");
      expect((0, _core_utils.getInheritableProperty)({
        dict: filledDict,
        key: "foo"
      })).toEqual(undefined);
    });
    it("fetches the property if it is not inherited", function () {
      const ref = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref,
        data: "quux"
      }]);
      const dict = new _primitives.Dict(xref);
      dict.set("foo", "bar");
      expect((0, _core_utils.getInheritableProperty)({
        dict,
        key: "foo"
      })).toEqual("bar");
      dict.set("baz", ["qux", ref]);
      expect((0, _core_utils.getInheritableProperty)({
        dict,
        key: "baz",
        getArray: true
      })).toEqual(["qux", "quux"]);
    });
    it("fetches the property if it is inherited and present on one level", function () {
      const ref = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref,
        data: "quux"
      }]);
      const firstDict = new _primitives.Dict(xref);
      const secondDict = new _primitives.Dict(xref);
      firstDict.set("Parent", secondDict);
      secondDict.set("foo", "bar");
      expect((0, _core_utils.getInheritableProperty)({
        dict: firstDict,
        key: "foo"
      })).toEqual("bar");
      secondDict.set("baz", ["qux", ref]);
      expect((0, _core_utils.getInheritableProperty)({
        dict: firstDict,
        key: "baz",
        getArray: true
      })).toEqual(["qux", "quux"]);
    });
    it("fetches the property if it is inherited and present on multiple levels", function () {
      const ref = _primitives.Ref.get(10, 0);

      const xref = new _test_utils.XRefMock([{
        ref,
        data: "quux"
      }]);
      const firstDict = new _primitives.Dict(xref);
      const secondDict = new _primitives.Dict(xref);
      firstDict.set("Parent", secondDict);
      firstDict.set("foo", "bar1");
      secondDict.set("foo", "bar2");
      expect((0, _core_utils.getInheritableProperty)({
        dict: firstDict,
        key: "foo"
      })).toEqual("bar1");
      expect((0, _core_utils.getInheritableProperty)({
        dict: firstDict,
        key: "foo",
        getArray: false,
        stopWhenFound: false
      })).toEqual(["bar1", "bar2"]);
      firstDict.set("baz", ["qux1", ref]);
      secondDict.set("baz", ["qux2", ref]);
      expect((0, _core_utils.getInheritableProperty)({
        dict: firstDict,
        key: "baz",
        getArray: true,
        stopWhenFound: false
      })).toEqual([["qux1", "quux"], ["qux2", "quux"]]);
    });
    it("stops searching when the loop limit is reached", function () {
      const dict = new _primitives.Dict();
      let currentDict = dict;
      let parentDict = null;

      for (let i = 0; i < 150; i++) {
        parentDict = new _primitives.Dict();
        currentDict.set("Parent", parentDict);
        currentDict = parentDict;
      }

      parentDict.set("foo", "bar");
      expect((0, _core_utils.getInheritableProperty)({
        dict,
        key: "foo"
      })).toEqual(undefined);
      dict.set("foo", "baz");
      expect((0, _core_utils.getInheritableProperty)({
        dict,
        key: "foo",
        getArray: false,
        stopWhenFound: false
      })).toEqual(["baz"]);
    });
  });
  describe("toRomanNumerals", function () {
    it("handles invalid arguments", function () {
      for (const input of ["foo", -1, 0]) {
        expect(function () {
          (0, _core_utils.toRomanNumerals)(input);
        }).toThrow(new Error("The number should be a positive integer."));
      }
    });
    it("converts numbers to uppercase Roman numerals", function () {
      expect((0, _core_utils.toRomanNumerals)(1)).toEqual("I");
      expect((0, _core_utils.toRomanNumerals)(6)).toEqual("VI");
      expect((0, _core_utils.toRomanNumerals)(7)).toEqual("VII");
      expect((0, _core_utils.toRomanNumerals)(8)).toEqual("VIII");
      expect((0, _core_utils.toRomanNumerals)(10)).toEqual("X");
      expect((0, _core_utils.toRomanNumerals)(40)).toEqual("XL");
      expect((0, _core_utils.toRomanNumerals)(100)).toEqual("C");
      expect((0, _core_utils.toRomanNumerals)(500)).toEqual("D");
      expect((0, _core_utils.toRomanNumerals)(1000)).toEqual("M");
      expect((0, _core_utils.toRomanNumerals)(2019)).toEqual("MMXIX");
    });
    it("converts numbers to lowercase Roman numerals", function () {
      expect((0, _core_utils.toRomanNumerals)(1, true)).toEqual("i");
      expect((0, _core_utils.toRomanNumerals)(6, true)).toEqual("vi");
      expect((0, _core_utils.toRomanNumerals)(7, true)).toEqual("vii");
      expect((0, _core_utils.toRomanNumerals)(8, true)).toEqual("viii");
      expect((0, _core_utils.toRomanNumerals)(10, true)).toEqual("x");
      expect((0, _core_utils.toRomanNumerals)(40, true)).toEqual("xl");
      expect((0, _core_utils.toRomanNumerals)(100, true)).toEqual("c");
      expect((0, _core_utils.toRomanNumerals)(500, true)).toEqual("d");
      expect((0, _core_utils.toRomanNumerals)(1000, true)).toEqual("m");
      expect((0, _core_utils.toRomanNumerals)(2019, true)).toEqual("mmxix");
    });
  });
  describe("log2", function () {
    it("handles values smaller than/equal to zero", function () {
      expect((0, _core_utils.log2)(0)).toEqual(0);
      expect((0, _core_utils.log2)(-1)).toEqual(0);
    });
    it("handles values larger than zero", function () {
      expect((0, _core_utils.log2)(1)).toEqual(0);
      expect((0, _core_utils.log2)(2)).toEqual(1);
      expect((0, _core_utils.log2)(3)).toEqual(2);
      expect((0, _core_utils.log2)(3.14)).toEqual(2);
    });
  });
  describe("isWhiteSpace", function () {
    it("handles space characters", function () {
      expect((0, _core_utils.isWhiteSpace)(0x20)).toEqual(true);
      expect((0, _core_utils.isWhiteSpace)(0x09)).toEqual(true);
      expect((0, _core_utils.isWhiteSpace)(0x0d)).toEqual(true);
      expect((0, _core_utils.isWhiteSpace)(0x0a)).toEqual(true);
    });
    it("handles non-space characters", function () {
      expect((0, _core_utils.isWhiteSpace)(0x0b)).toEqual(false);
      expect((0, _core_utils.isWhiteSpace)(null)).toEqual(false);
      expect((0, _core_utils.isWhiteSpace)(undefined)).toEqual(false);
    });
  });
});