tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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bits-toindex.js (2006B)

      1 // Copyright (C) 2017 Josh Wolfe. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 description: BigInt.asIntN type coercion for bits parameter
      5 esid: sec-bigint.asintn
      6 info: |
      7  BigInt.asIntN ( bits, bigint )
      8 
      9  1. Let bits be ? ToIndex(bits).
     10 features: [BigInt]
     11 ---*/
     12 
     13 assert.sameValue(BigInt.asIntN(0, 1n), 0n);
     14 assert.sameValue(BigInt.asIntN(1, 1n), -1n);
     15 assert.sameValue(BigInt.asIntN(-0.9, 1n), 0n, "ToIndex: truncate towards 0");
     16 assert.sameValue(BigInt.asIntN(0.9, 1n), 0n, "ToIndex: truncate towards 0");
     17 assert.sameValue(BigInt.asIntN(NaN, 1n), 0n, "ToIndex: NaN => 0");
     18 assert.sameValue(BigInt.asIntN(undefined, 1n), 0n, "ToIndex: undefined => NaN => 0");
     19 assert.sameValue(BigInt.asIntN(null, 1n), 0n, "ToIndex: null => 0");
     20 assert.sameValue(BigInt.asIntN(false, 1n), 0n, "ToIndex: false => 0");
     21 assert.sameValue(BigInt.asIntN(true, 1n), -1n, "ToIndex: true => 1");
     22 assert.sameValue(BigInt.asIntN("0", 1n), 0n, "ToIndex: parse Number");
     23 assert.sameValue(BigInt.asIntN("1", 1n), -1n, "ToIndex: parse Number");
     24 assert.sameValue(BigInt.asIntN("", 1n), 0n, "ToIndex: parse Number => NaN => 0");
     25 assert.sameValue(BigInt.asIntN("foo", 1n), 0n, "ToIndex: parse Number => NaN => 0");
     26 assert.sameValue(BigInt.asIntN("true", 1n), 0n, "ToIndex: parse Number => NaN => 0");
     27 assert.sameValue(BigInt.asIntN(3, 10n), 2n);
     28 assert.sameValue(BigInt.asIntN("3", 10n), 2n, "toIndex: parse Number");
     29 assert.sameValue(BigInt.asIntN(3.9, 10n), 2n, "toIndex: truncate towards 0");
     30 assert.sameValue(BigInt.asIntN("3.9", 10n), 2n, "toIndex: parse Number => truncate towards 0");
     31 assert.sameValue(BigInt.asIntN([0], 1n), 0n, 'ToIndex: [0].toString() => "0" => 0');
     32 assert.sameValue(BigInt.asIntN(["1"], 1n), -1n, 'ToIndex: ["1"].toString() => "1" => 1');
     33 assert.sameValue(BigInt.asIntN({}, 1n), 0n,
     34  'ToIndex: ({}).toString() => "[object Object]" => NaN => 0');
     35 assert.sameValue(BigInt.asIntN([], 1n), 0n, 'ToIndex: [].toString() => "" => NaN => 0');
     36 
     37 reportCompare(0, 0);