packages/codemode/test/string-search-test262.test.ts
Rama dev · réplica de lectura del repositorio original.
/*
* Portions adapted from Test262 at revision 250f204f23a9249ff204be2baec29600faae7b75:
* - test/built-ins/String/prototype/split/call-split-l-0-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-1-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-2-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-3-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-4-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-na-n-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-l-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-ll-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-h-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-hello-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-hellothere-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-o-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-x-instance-is-string-hello.js
* - test/built-ins/String/prototype/split/call-split-x-instance-is-empty-string.js
* - test/built-ins/String/prototype/split/call-split-4-instance-is-string-one-1-two-2-four-4.js
* - test/built-ins/String/prototype/split/call-split-on-instance-is-string-one-1-two-2-four-4.js
* - test/built-ins/String/prototype/split/call-split-instance-is-string-one-two-three-four-five.js
* - test/built-ins/String/prototype/split/call-split-instance-is-string-one-two-three.js
* - test/built-ins/String/prototype/split/call-split-instance-is-string.js
* - test/built-ins/String/prototype/split/instance-is-string-one-two-three-four-five.js
* - test/built-ins/String/prototype/split/instance-is-string.js
* - test/built-ins/String/prototype/split/separator-colon-instance-is-string-one-1-two-2-four-4.js
* - test/built-ins/String/prototype/split/separator-comma-instance-is-string-one-two-three-four-five.js
* - test/built-ins/String/prototype/split/separator-empty-string-instance-is-string.js
* - test/built-ins/String/prototype/split/call-split-without-arguments-and-instance-is-empty-string.js
* - test/built-ins/String/prototype/split/separator-undef.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A1_T6.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A1_T14.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T1.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T2.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T3.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T4.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T5.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T6.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T7.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T8.js
* - test/built-ins/String/prototype/slice/S15.5.4.13_A2_T9.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A1_T6.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A1_T14.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T1.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T2.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T3.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T4.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T5.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T6.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T7.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T8.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T9.js
* - test/built-ins/String/prototype/substring/S15.5.4.15_A2_T10.js
* - test/built-ins/String/prototype/includes/String.prototype.includes_FailMissingLetter.js
* - test/built-ins/String/prototype/includes/String.prototype.includes_SuccessNoLocation.js
* - test/built-ins/String/prototype/includes/String.prototype.includes_FailBadLocation.js
* - test/built-ins/String/prototype/includes/String.prototype.includes_FailLocation.js
* - test/built-ins/String/prototype/includes/String.prototype.includes_Success.js
* - test/built-ins/String/prototype/includes/searchstring-found-with-position.js
* - test/built-ins/String/prototype/includes/searchstring-found-without-position.js
* - test/built-ins/String/prototype/includes/searchstring-not-found-with-position.js
* - test/built-ins/String/prototype/includes/searchstring-not-found-without-position.js
* - test/built-ins/String/prototype/includes/return-false-with-out-of-bounds-position.js
* - test/built-ins/String/prototype/includes/return-true-if-searchstring-is-empty.js
* - test/built-ins/String/prototype/includes/coerced-values-of-position.js
* - test/built-ins/String/prototype/startsWith/searchstring-found-with-position.js
* - test/built-ins/String/prototype/startsWith/searchstring-found-without-position.js
* - test/built-ins/String/prototype/startsWith/searchstring-not-found-with-position.js
* - test/built-ins/String/prototype/startsWith/searchstring-not-found-without-position.js
* - test/built-ins/String/prototype/startsWith/out-of-bounds-position.js
* - test/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js
* - test/built-ins/String/prototype/startsWith/coerced-values-of-position.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_2.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_3.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_4.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Fail.js
* - test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Fail_2.js
* - test/built-ins/String/prototype/endsWith/searchstring-found-with-position.js
* - test/built-ins/String/prototype/endsWith/searchstring-found-without-position.js
* - test/built-ins/String/prototype/endsWith/searchstring-not-found-with-position.js
* - test/built-ins/String/prototype/endsWith/searchstring-not-found-without-position.js
* - test/built-ins/String/prototype/endsWith/return-false-if-search-start-is-less-than-zero.js
* - test/built-ins/String/prototype/endsWith/return-true-if-searchstring-is-empty.js
* - test/built-ins/String/prototype/endsWith/coerced-values-of-position.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T1.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T2.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T3.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T4.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A3_T1.js
* - test/built-ins/String/prototype/indexOf/S15.5.4.7_A3_T3.js
* - test/built-ins/String/prototype/indexOf/position-tointeger.js
* - test/built-ins/String/prototype/indexOf/searchstring-tostring.js
* - test/built-ins/String/prototype/lastIndexOf/not-a-substring.js
*
* Copyright 2009 the Sputnik authors. All rights reserved.
* Copyright (c) 2014 Ryan Lewis. All rights reserved.
* Copyright (C) 2015 the V8 project authors. All rights reserved.
* Copyright (C) 2016 the V8 project authors. All rights reserved.
* Copyright (C) 2017 Josh Wolfe. All rights reserved.
* Copyright (C) 2020 Leo Balter. All rights reserved.
* Copyright (C) 2026 Garham Lee. All rights reserved.
* Test262 portions are governed by the BSD license in LICENSE.test262.
*/
import { describe, expect, test } from "bun:test"
import { Effect } from "effect"
import { CodeMode } from "./lib/index.js"
const value = async (code: string) => {
const result = await Effect.runPromise(CodeMode.execute({ code, tools: {} }))
if (!result.ok) throw new Error(`expected success, got ${result.error.kind}: ${result.error.message}`)
return result.value
}
const cases = [
{
path: "test/built-ins/String/prototype/split/call-split-l-0-instance-is-string-hello.js",
code: `const result = "hello".split("l", 0); return [result.length, result[0] === undefined]`,
expected: [0, true],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[0] is expected to equal the value of __expected[0]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-1-instance-is-string-hello.js",
code: `const result = "hello".split("l", 1); return [result.length, result[0]]`,
expected: [1, "he"],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[0] is expected to equal the value of __expected[0]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-2-instance-is-string-hello.js",
code: `const result = "hello".split("l", 2); return [result.length, result[0], result[1]]`,
expected: [2, "he", ""],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[index] is expected to equal the value of __expected[index]",
"The value of __split[index] is expected to equal the value of __expected[index]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-3-instance-is-string-hello.js",
code: `const result = "hello".split("l", 3); return [result.length, result[0], result[1], result[2]]`,
expected: [3, "he", "", "o"],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[index] is expected to equal the value of __expected[index]",
"The value of __split[index] is expected to equal the value of __expected[index]",
"The value of __split[index] is expected to equal the value of __expected[index]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-4-instance-is-string-hello.js",
code: `const result = "hello".split("l", 4); return [result.length, result[0], result[1], result[2]]`,
expected: [3, "he", "", "o"],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[index] is expected to equal the value of __expected[index]",
"The value of __split[index] is expected to equal the value of __expected[index]",
"The value of __split[index] is expected to equal the value of __expected[index]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-na-n-instance-is-string-hello.js",
code: `const result = "hello".split("l", NaN); return [result.length, result[0] === undefined]`,
expected: [0, true],
labels: [
"The value of __split.length is expected to equal the value of __expected.length",
"The value of __split[0] is expected to equal the value of __expected[0]",
],
},
{
path: "test/built-ins/String/prototype/split/call-split-l-instance-is-string-hello.js",
code: `const result = "hello".split("l"); return [result.length, result[0], result[1], result[2]]`,
expected: [3, "he", "", "o"],
labels: [
"The value of __split.length is 3",
'The value of __split[0] is "he"',
'The value of __split[1] is ""',
'The value of __split[2] is "o"',
],
},
{
path: "test/built-ins/String/prototype/split/call-split-ll-instance-is-string-hello.js",
code: `const result = "hello".split("ll"); return [result.length, result[0], result[1]]`,
expected: [2, "he", "o"],
labels: ["The value of __split.length is 2", 'The value of __split[0] is "he"', 'The value of __split[1] is "o"'],
},
{
path: "test/built-ins/String/prototype/split/call-split-h-instance-is-string-hello.js",
code: `const result = "hello".split("h"); return [result.length, result[0], result[1]]`,
expected: [2, "", "ello"],
labels: ["The value of __split.length is 2", 'The value of __split[0] is ""', 'The value of __split[1] is "ello"'],
},
{
path: "test/built-ins/String/prototype/split/call-split-hello-instance-is-string-hello.js",
code: `const result = "hello".split("hello"); return [result.length, result[0], result[1]]`,
expected: [2, "", ""],
labels: ["The value of __split.length is 2", 'The value of __split[0] is ""', 'The value of __split[1] is ""'],
},
{
path: "test/built-ins/String/prototype/split/call-split-hellothere-instance-is-string-hello.js",
code: `const result = "hello".split("hellothere"); return [result.length, result[0]]`,
expected: [1, "hello"],
labels: ["The value of __split.length is 1", 'The value of __split[0] is "hello"'],
},
{
path: "test/built-ins/String/prototype/split/call-split-o-instance-is-string-hello.js",
code: `const result = "hello".split("o"); return [result.length, result[0], result[1]]`,
expected: [2, "hell", ""],
labels: ["The value of __split.length is 2", 'The value of __split[0] is "hell"', 'The value of __split[1] is ""'],
},
{
path: "test/built-ins/String/prototype/split/call-split-x-instance-is-string-hello.js",
code: `const result = "hello".split("x"); return [result.length, result[0]]`,
expected: [1, "hello"],
labels: ["The value of __split.length is 1", 'The value of __split[0] is "hello"'],
},
{
path: "test/built-ins/String/prototype/split/call-split-x-instance-is-empty-string.js",
code: `const result = "".split("x"); return [result.length, result[0]]`,
expected: [1, ""],
labels: ["The value of __split.length is 1", 'The value of __split[0] is ""'],
},
{
path: "test/built-ins/String/prototype/split/call-split-4-instance-is-string-one-1-two-2-four-4.js",
code: `const result = "one-1 two-2 four-4".split("-4"); return [result.length, result[0], result[1]]`,
expected: [2, "one-1 two-2 four", ""],
labels: [
"The value of __split.length is 2",
'The value of __split[0] is "one-1 two-2 four"',
'The value of __split[1] is ""',
],
},
{
path: "test/built-ins/String/prototype/split/call-split-on-instance-is-string-one-1-two-2-four-4.js",
code: `const result = "one-1 two-2 four-4".split("on"); return [result.length, result[0], result[1]]`,
expected: [2, "", "e-1 two-2 four-4"],
labels: [
"The value of __split.length is 2",
'The value of __split[0] is ""',
'The value of __split[1] is "e-1 two-2 four-4"',
],
},
{
path: "test/built-ins/String/prototype/split/call-split-instance-is-string-one-two-three-four-five.js",
code: `const result = "one two three four five".split(" "); return [result.length, ...result]`,
expected: [5, "one", "two", "three", "four", "five"],
labels: [
"The value of __split.length is 5",
'The value of __split[0] is "one"',
'The value of __split[1] is "two"',
'The value of __split[2] is "three"',
'The value of __split[3] is "four"',
'The value of __split[4] is "five"',
],
},
{
path: "test/built-ins/String/prototype/split/call-split-instance-is-string-one-two-three.js",
code: `const result = "one two three".split(""); return [result[0], result[1], result[11], result[12]]`,
expected: ["o", "n", "e", "e"],
labels: [
'The value of __split[0] is "o"',
'The value of __split[1] is "n"',
'The value of __split[11] is "e"',
'The value of __split[12] is "e"',
],
},
{
path: "test/built-ins/String/prototype/split/call-split-instance-is-string.js",
code: `const result = " ".split(" "); return [result.length, result[0], result[1]]`,
expected: [2, "", ""],
labels: ["The value of __split.length is 2", 'The value of __split[0] is ""', 'The value of __split[1] is ""'],
},
{
path: "test/built-ins/String/prototype/split/instance-is-string-one-two-three-four-five.js",
code: `const result = "one,two,three,four,five".split(); return [result.length, result[0]]`,
expected: [1, "one,two,three,four,five"],
labels: ["The value of __split.length is 1", 'The value of __split[0] is "one,two,three,four,five"'],
},
{
path: "test/built-ins/String/prototype/split/instance-is-string.js",
code: `const result = " ".split(); return [result.length, result[0]]`,
expected: [1, " "],
labels: ["The value of __split.length is 1", 'The value of __split[0] is " "'],
},
{
path: "test/built-ins/String/prototype/split/separator-colon-instance-is-string-one-1-two-2-four-4.js",
code: `const result = "one-1,two-2,four-4".split(":"); return [result.length, result[0]]`,
expected: [1, "one-1,two-2,four-4"],
labels: ["The value of __split.length is 1", 'The value of __split[0] is "one-1,two-2,four-4"'],
},
{
path: "test/built-ins/String/prototype/split/separator-comma-instance-is-string-one-two-three-four-five.js",
code: `const result = "one,two,three,four,five".split(","); return [result.length, ...result]`,
expected: [5, "one", "two", "three", "four", "five"],
labels: [
"The value of __split.length is 5",
'The value of __split[0] is "one"',
'The value of __split[1] is "two"',
'The value of __split[2] is "three"',
'The value of __split[3] is "four"',
'The value of __split[4] is "five"',
],
},
{
path: "test/built-ins/String/prototype/split/separator-empty-string-instance-is-string.js",
code: `const result = " ".split(""); return [result.length, result[0]]`,
expected: [1, " "],
labels: ["The value of __split.length is 1", 'The value of __split[0] is " "'],
},
{
path: "test/built-ins/String/prototype/split/call-split-without-arguments-and-instance-is-empty-string.js",
code: `const result = "".split(); return [result.length, result[0]]`,
expected: [1, ""],
labels: ["The value of __split.length is 1", 'The value of __split[0] is ""'],
},
{
path: "test/built-ins/String/prototype/split/separator-undef.js",
code: `const result = "undefined is not a function".split(); return [Array.isArray(result), result.length, result[0]]`,
expected: [true, 1, "undefined is not a function"],
labels: [
"implicit separator, result is array",
"implicit separator, result.length",
"implicit separator, [0] is the same string",
],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A1_T6.js",
code: `return ["undefined".slice(undefined, 3)]`,
expected: ["und"],
labels: ['#1: new String("undefined").slice(x,3) === "und"'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A1_T14.js",
code: `return ["report".slice(undefined)]`,
expected: ["report"],
labels: ['#1: "report".slice(function(){}()) === "report"'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T1.js",
code: `return [typeof "this is a string object".slice()]`,
expected: ["string"],
labels: ['#1: typeof __string.slice() === "string"'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T2.js",
code: `return ["this is a string object".slice(NaN, Infinity)]`,
expected: ["this is a string object"],
labels: ['#1: __string.slice(NaN, Infinity) === "this is a string object"'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T3.js",
code: `return ["".slice(1, 0)]`,
expected: [""],
labels: ['#1: __string.slice(1,0) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T4.js",
code: `return ["this is a string object".slice(Infinity, NaN)]`,
expected: [""],
labels: ['#1: __string.slice(Infinity, NaN) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T5.js",
code: `return ["this is a string object".slice(Infinity, Infinity)]`,
expected: [""],
labels: ['#1: __string.slice(Infinity, Infinity) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T6.js",
code: `return ["this is a string object".slice(-0.01, 0)]`,
expected: [""],
labels: ['#1: __string.slice(-0.01,0) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T7.js",
code: `const text = "this is a string object"; return [text.slice(text.length, text.length)]`,
expected: [""],
labels: ['#1: __string.slice(__string.length, __string.length) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T8.js",
code: `const text = "this is a string object"; return [text.slice(text.length + 1, 0)]`,
expected: [""],
labels: ['#1: __string.slice(__string.length+1, 0) === ""'],
},
{
path: "test/built-ins/String/prototype/slice/S15.5.4.13_A2_T9.js",
code: `return ["this is a string object".slice(-Infinity, -Infinity)]`,
expected: [""],
labels: ['#1: __string.slice(-Infinity, -Infinity) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A1_T6.js",
code: `return ["undefined".substring(undefined, 3)]`,
expected: ["und"],
labels: ['#1: new String("undefined").substring(x,3) === "und"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A1_T14.js",
code: `return ["report".substring(undefined)]`,
expected: ["report"],
labels: ['#1: "report".substring(function(){}()) === "report"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T1.js",
code: `return [typeof "this is a string object".substring()]`,
expected: ["string"],
labels: ['#1: typeof __string.substring() === "string"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T2.js",
code: `return ["this is a string object".substring(NaN, Infinity)]`,
expected: ["this is a string object"],
labels: ['#1: __string.substring(NaN, Infinity) === "this is a string object"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T3.js",
code: `return ["".substring(1, 0)]`,
expected: [""],
labels: ['#1: __string.substring(1,0) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T4.js",
code: `return ["this is a string object".substring(Infinity, NaN)]`,
expected: ["this is a string object"],
labels: ['#1: __string.substring(Infinity, NaN) === "this is a string object"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T5.js",
code: `return ["this is a string object".substring(Infinity, Infinity)]`,
expected: [""],
labels: ['#1: __string.substring(Infinity, Infinity) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T6.js",
code: `return ["this is a string object".substring(-0.01, 0)]`,
expected: [""],
labels: ['#1: __string.substring(-0.01,0) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T7.js",
code: `const text = "this is a string object"; return [text.substring(text.length, text.length)]`,
expected: [""],
labels: ['#1: __string.substring(__string.length, __string.length) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T8.js",
code: `const text = "this is a string object"; return [text.substring(text.length + 1, 0)]`,
expected: ["this is a string object"],
labels: ['#1: __string.substring(__string.length+1, 0) === "this is a string object"'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T9.js",
code: `return ["this is a string object".substring(-Infinity, -Infinity)]`,
expected: [""],
labels: ['#1: __string.substring(-Infinity, -Infinity) === ""'],
},
{
path: "test/built-ins/String/prototype/substring/S15.5.4.15_A2_T10.js",
code: `return ["this_is_a_string object".substring(0, 8)]`,
expected: ["this_is_"],
labels: ['#1: __string.substring(0,8) === "this_is_"'],
},
{
path: "test/built-ins/String/prototype/includes/String.prototype.includes_FailMissingLetter.js",
code: `return ["word".includes("a", 0)]`,
expected: [false],
labels: ['"word".includes("a", 0)'],
},
{
path: "test/built-ins/String/prototype/includes/String.prototype.includes_SuccessNoLocation.js",
code: `return ["word".includes("w")]`,
expected: [true],
labels: ['"word".includes("w")'],
},
{
path: "test/built-ins/String/prototype/includes/String.prototype.includes_FailBadLocation.js",
code: `return ["word".includes("w", 5)]`,
expected: [false],
labels: ['"word".includes("w", 5)'],
},
{
path: "test/built-ins/String/prototype/includes/String.prototype.includes_FailLocation.js",
code: `return ["word".includes("o", 3)]`,
expected: [false],
labels: ['"word".includes("o", 3)'],
},
{
path: "test/built-ins/String/prototype/includes/String.prototype.includes_Success.js",
code: `return ["word".includes("w", 0)]`,
expected: [true],
labels: ['"word".includes("w", 0)'],
},
{
path: "test/built-ins/String/prototype/includes/searchstring-found-with-position.js",
code: `const text = "The future is cool!"; return [text.includes("The future", 0), text.includes(" is ", 1), text.includes("cool!", 10)]`,
expected: [true, true, true],
labels: [
'Returns true for str.includes("The future", 0)',
'Returns true for str.includes(" is ", 1)',
'Returns true for str.includes("cool!", 10)',
],
},
{
path: "test/built-ins/String/prototype/includes/searchstring-found-without-position.js",
code: `const text = "The future is cool!"; return [text.includes("The future"), text.includes("is cool!"), text.includes(text)]`,
expected: [true, true, true],
labels: [
'Returns true for str.includes("The future")',
'Returns true for str.includes("is cool!")',
"Returns true for str.includes(str)",
],
},
{
path: "test/built-ins/String/prototype/includes/searchstring-not-found-with-position.js",
code: `const text = "The future is cool!"; return [text.includes("The future", 1), text.includes(text, 1)]`,
expected: [false, false],
labels: ['Returns false on str.includes("The future", 1)', "Returns false on str.includes(str, 1)"],
},
{
path: "test/built-ins/String/prototype/includes/searchstring-not-found-without-position.js",
code: `const text = "The future is cool!"; return [text.includes("Flash"), text.includes("FUTURE")]`,
expected: [false, false],
labels: ["Flash if not included", "includes is case sensitive"],
},
{
path: "test/built-ins/String/prototype/includes/return-false-with-out-of-bounds-position.js",
code: `const text = "The future is cool!"; return [
text.includes("!", text.length + 1), text.includes("!", 100), text.includes("!", Infinity), text.includes("!", text.length),
]`,
expected: [false, false, false, false],
labels: [
'str.includes("!", str.length + 1) returns false',
'str.includes("!", 100) returns false',
'str.includes("!", Infinity) returns false',
'str.includes("!", str.length) returns false',
],
},
{
path: "test/built-ins/String/prototype/includes/return-true-if-searchstring-is-empty.js",
code: `const text = "The future is cool!"; return [text.includes("", text.length), text.includes(""), text.includes("", Infinity)]`,
expected: [true, true, true],
labels: [
'str.includes("", str.length) returns true',
'str.includes("") returns true',
'str.includes("", Infinity) returns true',
],
},
{
path: "test/built-ins/String/prototype/includes/coerced-values-of-position.js",
code: `const text = "The future is cool!"; return [
text.includes("The future", NaN), text.includes("The future", undefined), text.includes("The future", 0.4),
text.includes("The future", -1), text.includes("The future", 1.4),
]`,
expected: [true, true, true, true, false],
labels: ["NaN coerced to 0", "undefined coerced to 0", "0.4 coerced to 0", "negative position", "1.4 coerced to 1"],
},
{
path: "test/built-ins/String/prototype/startsWith/searchstring-found-with-position.js",
code: `const text = "The future is cool!"; return [text.startsWith("The future", 0), text.startsWith("future", 4), text.startsWith(" is cool!", 10)]`,
expected: [true, true, true],
labels: [
'str.startsWith("The future", 0) === true',
'str.startsWith("future", 4) === true',
'str.startsWith(" is cool!", 10) === true',
],
},
{
path: "test/built-ins/String/prototype/startsWith/searchstring-found-without-position.js",
code: `const text = "The future is cool!"; return [text.startsWith("The "), text.startsWith("The future"), text.startsWith(text)]`,
expected: [true, true, true],
labels: [
'str.startsWith("The ") === true',
'str.startsWith("The future") === true',
"str.startsWith(str) === true",
],
},
{
path: "test/built-ins/String/prototype/startsWith/searchstring-not-found-with-position.js",
code: `const text = "The future is cool!"; return [text.startsWith("The future", 1), text.startsWith(text, 1)]`,
expected: [false, false],
labels: ['str.startsWith("The future", 1) === false', "str.startsWith(str, 1) === false"],
},
{
path: "test/built-ins/String/prototype/startsWith/searchstring-not-found-without-position.js",
code: `const text = "The future is cool!"; return [text.startsWith("Flash"), text.startsWith("THE FUTURE"), text.startsWith("future is cool!")]`,
expected: [false, false, false],
labels: [
'str.startsWith("Flash") === false',
"startsWith is case sensitive",
'str.startsWith("future is cool!") === false',
],
},
{
path: "test/built-ins/String/prototype/startsWith/out-of-bounds-position.js",
code: `const text = "The future is cool!"; return [
text.startsWith("!", text.length), text.startsWith("!", 100), text.startsWith("!", Infinity),
text.startsWith("The future", -1), text.startsWith("The future", -Infinity),
]`,
expected: [false, false, false, true, true],
labels: [
'str.startsWith("!", str.length) returns false',
'str.startsWith("!", 100) returns false',
'str.startsWith("!", Infinity) returns false',
"position argument < 0 will search from the start of the string (-1)",
"position argument < 0 will search from the start of the string (-Infinity)",
],
},
{
path: "test/built-ins/String/prototype/startsWith/return-true-if-searchstring-is-empty.js",
code: `const text = "The future is cool!"; return [text.startsWith(""), text.startsWith("", text.length), text.startsWith("", Infinity)]`,
expected: [true, true, true],
labels: [
'str.startsWith("") returns true',
'str.startsWith("", str.length) returns true',
'str.startsWith("", Infinity) returns true',
],
},
{
path: "test/built-ins/String/prototype/startsWith/coerced-values-of-position.js",
code: `const text = "The future is cool!"; return [
text.startsWith("The future", NaN), text.startsWith("The future", undefined),
text.startsWith("The future", 0.4), text.startsWith("The future", 1.4),
]`,
expected: [true, true, true, false],
labels: ["NaN coerced to 0", "undefined coerced to 0", "0.4 coerced to 0", "1.4 coerced to 1"],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success.js",
code: `return ["word".endsWith("d")]`,
expected: [true],
labels: ['"word".endsWith("d")'],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_2.js",
code: `return ["word".endsWith("d", 4)]`,
expected: [true],
labels: ['"word".endsWith("d", 4)'],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_3.js",
code: `return ["word".endsWith("d", 25)]`,
expected: [true],
labels: ['"word".endsWith("d", 25)'],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Success_4.js",
code: `return ["word".endsWith("r", 3)]`,
expected: [true],
labels: ['"word".endsWith("r", 3)'],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Fail.js",
code: `return ["word".endsWith("r")]`,
expected: [false],
labels: ['"word".endsWith("r")'],
},
{
path: "test/built-ins/String/prototype/endsWith/String.prototype.endsWith_Fail_2.js",
code: `return ["word".endsWith("d", 3)]`,
expected: [false],
labels: ['"word".endsWith("d", 3)'],
},
{
path: "test/built-ins/String/prototype/endsWith/searchstring-found-with-position.js",
code: `const text = "The future is cool!"; return [text.endsWith("The future", 10), text.endsWith("future", 10), text.endsWith(" is cool!", text.length)]`,
expected: [true, true, true],
labels: [
'str.endsWith("The future", 10) === true',
'str.endsWith("future", 10) === true',
'str.endsWith(" is cool!", str.length) === true',
],
},
{
path: "test/built-ins/String/prototype/endsWith/searchstring-found-without-position.js",
code: `const text = "The future is cool!"; return [text.endsWith("cool!"), text.endsWith("!"), text.endsWith(text)]`,
expected: [true, true, true],
labels: ['str.endsWith("cool!") === true', 'str.endsWith("!") === true', "str.endsWith(str) === true"],
},
{
path: "test/built-ins/String/prototype/endsWith/searchstring-not-found-with-position.js",
code: `const text = "The future is cool!"; return [text.endsWith("is cool!", text.length - 1), text.endsWith("!", 1)]`,
expected: [false, false],
labels: ['str.endsWith("is cool!", str.length - 1) === false', 'str.endsWith("!", 1) === false'],
},
{
path: "test/built-ins/String/prototype/endsWith/searchstring-not-found-without-position.js",
code: `const text = "The future is cool!"; return [text.endsWith("is Flash!"), text.endsWith("IS COOL!"), text.endsWith("The future")]`,
expected: [false, false, false],
labels: [
'str.endsWith("is Flash!") === false',
"endsWith is case sensitive",
'str.endsWith("The future") === false',
],
},
{
path: "test/built-ins/String/prototype/endsWith/return-false-if-search-start-is-less-than-zero.js",
code: `return ["web".endsWith("w", 0), "Bob".endsWith(" Bob")]`,
expected: [false, false],
labels: ['"web".endsWith("w", 0) returns false', '"Bob".endsWith(" Bob") returns false'],
},
{
path: "test/built-ins/String/prototype/endsWith/return-true-if-searchstring-is-empty.js",
code: `const text = "The future is cool!"; return [
text.endsWith(""), text.endsWith("", text.length), text.endsWith("", Infinity),
text.endsWith("", -1), text.endsWith("", -Infinity),
]`,
expected: [true, true, true, true, true],
labels: [
'str.endsWith("") returns true',
'str.endsWith("", str.length) returns true',
'str.endsWith("", Infinity) returns true',
'str.endsWith("", -1) returns true',
'str.endsWith("", -Infinity) returns true',
],
},
{
path: "test/built-ins/String/prototype/endsWith/coerced-values-of-position.js",
code: `const text = "The future is cool!"; return [
text.endsWith("", NaN), text.endsWith("", undefined), text.endsWith("The future", 10.4),
]`,
expected: [true, true, true],
labels: ["NaN coerced to 0", "undefined coerced to 0", "10.4 coerced to 10"],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T1.js",
code: `return ["abcd".indexOf("abcdab")]`,
expected: [-1],
labels: ['#1: "abcd".indexOf("abcdab")===-1'],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T2.js",
code: `return ["abcd".indexOf("abcdab", 0)]`,
expected: [-1],
labels: ['#1: "abcd".indexOf("abcdab",0)===-1'],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T3.js",
code: `return ["abcd".indexOf("abcdab", 99)]`,
expected: [-1],
labels: ['#1: "abcd".indexOf("abcdab",99)===-1'],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A2_T4.js",
code: `return ["abcd".indexOf("abcdab", NaN)]`,
expected: [-1],
labels: ['#1: "abcd".indexOf("abcdab",NaN)===-1'],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A3_T1.js",
code: `return ["$$abcdabcd".indexOf("ab", NaN)]`,
expected: [2],
labels: ['#1: "$$abcdabcd".indexOf("ab",NaN)===2'],
},
{
path: "test/built-ins/String/prototype/indexOf/S15.5.4.7_A3_T3.js",
code: `return ["$$abcdabcd".indexOf("ab", -Infinity)]`,
expected: [2],
labels: ['#1: "$$abcdabcd".indexOf("ab", function(){return -Infinity;}())===2'],
},
{
path: "test/built-ins/String/prototype/indexOf/position-tointeger.js",
code: `return [
"aaaa".indexOf("aa", 0), "aaaa".indexOf("aa", 1), "aaaa".indexOf("aa", -0.9),
"aaaa".indexOf("aa", 0.9), "aaaa".indexOf("aa", 1.9), "aaaa".indexOf("aa", NaN),
"aaaa".indexOf("aa", Infinity), "aaaa".indexOf("aa", undefined),
"aaaa".indexOf("aa", 2), "aaaa".indexOf("aa", 2.9),
]`,
expected: [0, 1, 0, 0, 1, 0, -1, 0, 2, 2],
labels: [
"position 0",
"position 1",
"ToInteger: truncate towards 0 (-0.9)",
"ToInteger: truncate towards 0 (0.9)",
"ToInteger: truncate towards 0 (1.9)",
"ToInteger: NaN => 0",
"position Infinity",
"ToInteger: undefined => NaN => 0",
"position 2",
"ToInteger: truncate towards 0 (2.9)",
],
},
{
path: "test/built-ins/String/prototype/indexOf/searchstring-tostring.js",
code: `return ["foo".indexOf(""), "__foo__".indexOf("foo")]`,
expected: [0, 2],
labels: ['"foo".indexOf("")', '"__foo__".indexOf("foo")'],
},
{
path: "test/built-ins/String/prototype/lastIndexOf/not-a-substring.js",
code: `return ["abc".lastIndexOf("d")]`,
expected: [-1],
labels: [
"String.prototype.lastIndexOf returns -1 when searchString is shorter than this and searchString is not a substring of this.",
],
},
] as const
describe("Test262-adapted String search and extraction behavior", () => {
for (const item of cases) {
test(item.path, async () => {
const actual = await value(item.code)
if (!Array.isArray(actual)) throw new Error(`expected assertion values for ${item.path}`)
expect(actual.length, "adapted assertion count").toBe(item.expected.length)
item.expected.forEach((expected, index) => expect(actual[index], item.labels[index]!).toEqual(expected))
})
}
})