test/js-native-api/test_bigint/test.js

'use strict';
const common = require('../../common');
const assert = require('assert');
const {
  IsLossless,
  TestInt64,
  TestUint64,
  TestWords,
  CreateTooBigBigInt,
  MakeBigIntWordsThrow,
} = require(`./build/${common.buildType}/test_bigint`);

[
  0n,
  -0n,
  1n,
  -1n,
  100n,
  2121n,
  -1233n,
  986583n,
  -976675n,
  98765432213456789876546896323445679887645323232436587988766545658n,
  -4350987086545760976737453646576078997096876957864353245245769809n,
].forEach((num) => {
  if (num > -(2n ** 63n) && num < 2n ** 63n) {
    assert.strictEqual(TestInt64(num), num);
    assert.strictEqual(IsLossless(num, true), true);
  } else {
    assert.strictEqual(IsLossless(num, true), false);
  }

  if (num >= 0 && num < 2n ** 64n) {
    assert.strictEqual(TestUint64(num), num);
    assert.strictEqual(IsLossless(num, false), true);
  } else {
    assert.strictEqual(IsLossless(num, false), false);
  }

  assert.strictEqual(num, TestWords(num));
});

assert.throws(() => CreateTooBigBigInt(), {
  name: 'Error',
  message: 'Invalid argument',
});

// Test that we correctly forward exceptions from the engine.
assert.throws(() => MakeBigIntWordsThrow(), {
  name: 'RangeError',
  message: 'Maximum BigInt size exceeded'
});