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• [DIR] ..
• [FILE] array_test.js
• [FILE] bool_test.js
• [FILE] define_test.js
• [FILE] double_test.js
• [FILE] enum_test.js
• [FILE] float_test.js
• [FILE] hyper_test.js
• [FILE] int_test.js
• [FILE] opaque_test.js
• [FILE] option_test.js
• [FILE] quadruple_test.js
• [FILE] string_test.js
• [FILE] struct_test.js
• [FILE] struct_union_test.js
• [FILE] union_test.js
• [FILE] unsigned-hyper_test.js
• [FILE] unsigned-int_test.js
• [FILE] var-array_test.js
• [FILE] var-opaque_test.js
• [FILE] void_test.js

Просмотр файла: float_test.js

let Float = XDR.Float;
import { Cursor } from '../../src/cursor';
import { cursorToArray } from '../support/io-helpers';

describe('Float.read', function() {
  it('decodes correctly', function() {
    expect(read([0x00, 0x00, 0x00, 0x00])).to.eql(0.0);
    expect(read([0x80, 0x00, 0x00, 0x00])).to.eql(-0.0);
    expect(read([0x3f, 0x80, 0x00, 0x00])).to.eql(1.0);
    expect(read([0xbf, 0x80, 0x00, 0x00])).to.eql(-1.0);
    expect(read([0x7f, 0xc0, 0x00, 0x00])).to.eql(NaN);
    expect(read([0x7f, 0xf8, 0x00, 0x00])).to.eql(NaN);
  });

  function read(bytes) {
    let io = new Cursor(bytes);
    return Float.read(io);
  }
});

describe('Float.write', function() {
  it('encodes correctly', function() {
    expect(write(0.0)).to.eql([0x00, 0x00, 0x00, 0x00]);
    expect(write(-0.0)).to.eql([0x80, 0x00, 0x00, 0x00]);
    expect(write(1.0)).to.eql([0x3f, 0x80, 0x00, 0x00]);
    expect(write(-1.0)).to.eql([0xbf, 0x80, 0x00, 0x00]);
  });

  function write(value) {
    let io = new Cursor(8);
    Float.write(value, io);
    return cursorToArray(io);
  }
});

describe('Float.isValid', function() {
  it('returns true for numbers', function() {
    expect(Float.isValid(0)).to.be.true;
    expect(Float.isValid(-1)).to.be.true;
    expect(Float.isValid(1.0)).to.be.true;
    expect(Float.isValid(100000.0)).to.be.true;
    expect(Float.isValid(NaN)).to.be.true;
    expect(Float.isValid(Infinity)).to.be.true;
    expect(Float.isValid(-Infinity)).to.be.true;
  });

  it('returns false for non numbers', function() {
    expect(Float.isValid(true)).to.be.false;
    expect(Float.isValid(false)).to.be.false;
    expect(Float.isValid(null)).to.be.false;
    expect(Float.isValid('0')).to.be.false;
    expect(Float.isValid([])).to.be.false;
    expect(Float.isValid([0])).to.be.false;
    expect(Float.isValid('hello')).to.be.false;
    expect(Float.isValid({ why: 'hello' })).to.be.false;
    expect(Float.isValid(['how', 'do', 'you', 'do'])).to.be.false;
  });
});

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