1 // |reftest| shell-option(--enable-uint8array-base64) skip-if(!Uint8Array.fromBase64||!xulRuntime.shell) -- uint8array-base64 is not enabled unconditionally, requires shell-options
2 // Copyright (C) 2024 Kevin Gibbons. All rights reserved.
3 // This code is governed by the BSD license found in the LICENSE file.
5 esid: sec-uint8array.prototype.setfrombase64
6 description: Uint8Array.prototype.setFromBase64 triggers effects of the "alphabet" and "lastChunkHandling" getters, but does not perform toString on the results
7 includes: [compareArray.js]
8 features: [uint8array-base64, TypedArray]
11 assert.throws(TypeError, function() {
12 var target = new Uint8Array([255, 255, 255]);
13 target.setFromBase64("Zg==", { alphabet: Object("base64") });
16 assert.throws(TypeError, function() {
17 var target = new Uint8Array([255, 255, 255]);
18 target.setFromBase64("Zg==", { lastChunkHandling: Object("strict") });
22 var toStringCalls = 0;
23 var throwyToString = {
24 toString: function() {
26 throw new Test262Error("toString called");
29 assert.throws(TypeError, function() {
30 var target = new Uint8Array([255, 255, 255]);
31 target.setFromBase64("Zg==", { alphabet: throwyToString });
33 assert.sameValue(toStringCalls, 0);
35 assert.throws(TypeError, function() {
36 var target = new Uint8Array([255, 255, 255]);
37 target.setFromBase64("Zg==", { lastChunkHandling: throwyToString });
39 assert.sameValue(toStringCalls, 0);
42 var alphabetAccesses = 0;
43 var base64UrlOptions = {};
44 Object.defineProperty(base64UrlOptions, "alphabet", {
46 alphabetAccesses += 1;
50 var target = new Uint8Array([255, 255, 255, 255]);
51 var result = target.setFromBase64("x-_y", base64UrlOptions);
52 assert.sameValue(result.read, 4);
53 assert.sameValue(result.written, 3);
54 assert.compareArray(target, [199, 239, 242, 255]);
55 assert.sameValue(alphabetAccesses, 1);
57 var lastChunkHandlingAccesses = 0;
58 var strictOptions = {};
59 Object.defineProperty(strictOptions, "lastChunkHandling", {
61 lastChunkHandlingAccesses += 1;
65 var target = new Uint8Array([255, 255, 255, 255]);
66 var result = target.setFromBase64("Zg==", strictOptions);
67 assert.sameValue(result.read, 4);
68 assert.sameValue(result.written, 1);
69 assert.compareArray(target, [102, 255, 255, 255]);
70 assert.sameValue(lastChunkHandlingAccesses, 1);