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feat(getStaticValue): added more safe calls (#76)
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‎src/get-static-value.mjs‎

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Original file line numberDiff line numberDiff line change
@@ -66,6 +66,24 @@ const builtinNames = Object.freeze(
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const callAllowed = new Set(
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[
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Array.isArray,
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Array.of,
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Array.prototype.at,
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Array.prototype.concat,
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Array.prototype.entries,
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Array.prototype.every,
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Array.prototype.filter,
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Array.prototype.find,
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Array.prototype.findIndex,
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Array.prototype.flat,
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Array.prototype.includes,
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Array.prototype.indexOf,
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Array.prototype.join,
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Array.prototype.keys,
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Array.prototype.lastIndexOf,
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Array.prototype.slice,
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Array.prototype.some,
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Array.prototype.toString,
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Array.prototype.values,
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typeof BigInt === "function" ? BigInt : undefined,
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Boolean,
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Date,
@@ -78,6 +96,12 @@ const callAllowed = new Set(
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isFinite,
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isNaN,
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isPrototypeOf,
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Map,
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Map.prototype.entries,
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Map.prototype.get,
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Map.prototype.has,
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Map.prototype.keys,
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Map.prototype.values,
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...Object.getOwnPropertyNames(Math)
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.filter((k) => k !== "random")
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.map((k) => Math[k])
@@ -87,6 +111,10 @@ const callAllowed = new Set(
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Number.isNaN,
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Number.parseFloat,
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Number.parseInt,
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Number.prototype.toExponential,
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Number.prototype.toFixed,
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Number.prototype.toPrecision,
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Number.prototype.toString,
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Object,
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Object.entries,
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Object.is,
@@ -98,10 +126,39 @@ const callAllowed = new Set(
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parseFloat,
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parseInt,
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RegExp,
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Set,
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Set.prototype.entries,
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Set.prototype.has,
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Set.prototype.keys,
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Set.prototype.values,
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String,
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String.fromCharCode,
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String.fromCodePoint,
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String.raw,
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String.prototype.at,
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String.prototype.charAt,
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String.prototype.charCodeAt,
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String.prototype.codePointAt,
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String.prototype.concat,
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String.prototype.endsWith,
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String.prototype.includes,
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String.prototype.indexOf,
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String.prototype.lastIndexOf,
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String.prototype.normalize,
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String.prototype.padEnd,
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String.prototype.padStart,
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String.prototype.slice,
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String.prototype.startsWith,
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String.prototype.substr,
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String.prototype.substring,
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String.prototype.toLowerCase,
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String.prototype.toString,
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String.prototype.toUpperCase,
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String.prototype.trim,
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String.prototype.trimEnd,
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String.prototype.trimLeft,
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String.prototype.trimRight,
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String.prototype.trimStart,
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Symbol.for,
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Symbol.keyFor,
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unescape,

‎test/get-static-value.mjs‎

Lines changed: 86 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -37,6 +37,17 @@ describe("The 'getStaticValue' function", () => {
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{ code: "1 ^ 15", expected: { value: 14 } },
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{ code: "3 & 2", expected: { value: 2 } },
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{ code: "a + 1", expected: null },
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{
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code: "(123.456).toExponential()",
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expected: { value: "1.23456e+2" },
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},
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{ code: "(123.456).toExponential(3)", expected: { value: "1.235e+2" } },
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{ code: "(123.456).toFixed()", expected: { value: "123" } },
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{ code: "(123.456).toFixed(1)", expected: { value: "123.5" } },
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{ code: "(123.456).toPrecision()", expected: { value: "123.456" } },
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{ code: "(123.456).toPrecision(2)", expected: { value: "1.2e+2" } },
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{ code: "(123.456).toString()", expected: { value: "123.456" } },
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{ code: "(123).toString(16)", expected: { value: "7b" } },
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{ code: "String(7)", expected: { value: "7" } },
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{ code: "Math.round(0.7)", expected: { value: 1 } },
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{ code: "Math['round'](0.4)", expected: { value: 0 } },
@@ -84,6 +95,50 @@ describe("The 'getStaticValue' function", () => {
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{ code: "Object.xxx", expected: { value: undefined } },
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{ code: "new Array(2)", expected: null },
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{ code: "new Array(len)", expected: null },
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{ code: "Array.of()", expected: { value: [] } },
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{ code: "Array.of(1)", expected: { value: [1] } },
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{ code: "Array.of(1, 2)", expected: { value: [1, 2] } },
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{
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code: "[0,1,2].at(-1)",
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expected: Array.prototype.at ? { value: 2 } : null,
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},
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{
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code: "[0,1,2].concat([3,4], [5])",
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expected: { value: [0, 1, 2, 3, 4, 5] },
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},
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{ code: "[0,1,2].every(Boolean)", expected: { value: false } },
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{ code: "[0,1,2].filter(Boolean)", expected: { value: [1, 2] } },
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{ code: "[0,1,2].find((i) => i === 2)", expected: null },
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{ code: "[0,1,2].findIndex((i) => i === 2)", expected: null },
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{
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code: "[-1, [0,1,2], [[4]]].flat()",
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expected: { value: [-1, 0, 1, 2, [4]] },
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},
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{ code: "[0,1,2].includes(4)", expected: { value: false } },
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{ code: "[0,1,2].indexOf(4)", expected: { value: -1 } },
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{ code: "[0,1,2].join()", expected: { value: "0,1,2" } },
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{ code: "[0,1,2].join('|')", expected: { value: "0|1|2" } },
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{ code: "[1,1,1].lastIndexOf(1)", expected: { value: 2 } },
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{ code: "[0,1,2].slice(1)", expected: { value: [1, 2] } },
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{ code: "[0,1,2].some(Boolean)", expected: { value: true } },
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{ code: "[0,1,2].toString()", expected: { value: "0,1,2" } },
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{ code: "String([0,1,2])", expected: { value: "0,1,2" } },
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{ code: "[...[0,1,,2].keys()]", expected: { value: [0, 1, 2, 3] } },
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{
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code: "[...[0,1,,2].values()]",
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expected: { value: [0, 1, undefined, 2] },
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},
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{
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code: "[...[0,1,,2].entries()]",
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expected: {
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value: [
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[0, 0],
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[1, 1],
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[2, undefined],
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[3, 2],
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],
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},
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},
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{ code: "({})", expected: { value: {} } },
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{
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code: "({a: 1, b: 2, c: 3})",
@@ -105,6 +160,12 @@ describe("The 'getStaticValue' function", () => {
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{ code: "String.raw`\\unicode`", expected: { value: "\\unicode" } },
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{ code: "`he${a}o`", expected: null }, //eslint-disable-line no-template-curly-in-string
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{ code: "x`hello`", expected: null },
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{ code: "' foo '.trim()", expected: { value: "foo" } },
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{ code: "' foo '.trim().toUpperCase()", expected: { value: "FOO" } },
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{ code: "' foo '.indexOf('f')", expected: { value: 2 } },
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{ code: "' foo '.charAt(4)", expected: { value: "o" } },
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{ code: "' foo '.charCodeAt(400)", expected: { value: NaN } },
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{ code: "' foo '.repeat(1e12)", expected: null },
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{ code: "-1", expected: { value: -1 } },
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{ code: "+'1'", expected: { value: 1 } },
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{ code: "!0", expected: { value: true } },
@@ -243,6 +304,31 @@ const aMap = Object.freeze({
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code: "({'a': 1, 1e+1: 2, 2n: 3})",
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expected: { value: { a: 1, 10: 2, 2: 3 } },
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},
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{
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code: "new Set([1,2])",
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expected: { value: new Set([1, 2]) },
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},
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{
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code: "new Set([1,2]).has(2)",
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expected: { value: true },
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},
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{
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code: "new Map([[1,2], [4,6]])",
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expected: {
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value: new Map([
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[1, 2],
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[4, 6],
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]),
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},
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},
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{
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code: "const m = new Map([[1,2], [4,6]]); m.get(1)",
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expected: { value: 2 },
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},
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{
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code: "const m = new Map([[1,2], [4,6]]); m.has(2)",
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expected: { value: false },
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},
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...(semver.gte(eslint.Linter.version, "8.0.0")
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? [
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{

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