/
no-magic-numbers.js
926 lines (917 loc) · 28.3 KB
/
no-magic-numbers.js
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/**
* @fileoverview Tests for no-magic-numbers rule.
* @author Vincent Lemeunier
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const rule = require("../../../lib/rules/no-magic-numbers"),
{ RuleTester } = require("../../../lib/rule-tester");
//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------
const ruleTester = new RuleTester();
ruleTester.run("no-magic-numbers", rule, {
valid: [
"var x = parseInt(y, 10);",
"var x = parseInt(y, -10);",
"var x = Number.parseInt(y, 10);",
{
code: "const foo = 42;",
env: { es6: true }
},
{
code: "var foo = 42;",
options: [{
enforceConst: false
}],
env: { es6: true }
},
"var foo = -42;",
{
code: "var foo = 0 + 1 - 2 + -2;",
options: [{
ignore: [0, 1, 2, -2]
}]
},
{
code: "var foo = 0 + 1 + 2 + 3 + 4;",
options: [{
ignore: [0, 1, 2, 3, 4]
}]
},
"var foo = { bar:10 }",
{
code: "setTimeout(function() {return 1;}, 0);",
options: [{
ignore: [0, 1]
}]
},
{
code: "var data = ['foo', 'bar', 'baz']; var third = data[3];",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[0]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[-0]", // Allowed. -0 is not the same as 0 but it will be coerced to "0", so foo[-0] refers to the element at index 0.
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[1]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[100]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[200.00]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[3e4]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[1.23e2]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[230e-1]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[0b110]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2015 }
},
{
code: "foo[0o71]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2015 }
},
{
code: "foo[0xABC]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[0123]",
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[5.0000000000000001]", // loses precision and evaluates to 5
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[4294967294]", // max array index
options: [{
ignoreArrayIndexes: true
}]
},
{
code: "foo[0n]", // Allowed. 0n will be coerced to "0", so foo[0n] refers to the element at index 0.
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo[-0n]", // Allowed. -0n evaluates to 0n which will be coerced to "0", so foo[-0n] refers to the element at index 0.
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo[1n]", // Allowed. 1n will be coerced to "1", so foo[1n] refers to the element at index 1.
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo[100n]", // Allowed. 100n will be coerced to "100", so foo[100n] refers to the element at index 100.
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo[0xABn]", // Allowed. 0xABn is evaluated to 171n and will be coerced to "171", so foo[0xABn] refers to the element at index 171.
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo[4294967294n]", // max array index
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "var a = <input maxLength={10} />;",
parserOptions: {
ecmaFeatures: {
jsx: true
}
}
},
{
code: "var a = <div objectProp={{ test: 1}}></div>;",
parserOptions: {
ecmaFeatures: {
jsx: true
}
}
},
{
code: "f(100n)",
options: [{ ignore: ["100n"] }],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "f(-100n)",
options: [{ ignore: ["-100n"] }],
parserOptions: { ecmaVersion: 2020 }
},
{
code: "const { param = 123 } = sourceObject;",
options: [{ ignoreDefaultValues: true }],
env: { es6: true }
},
{
code: "const func = (param = 123) => {}",
options: [{ ignoreDefaultValues: true }],
env: { es6: true }
},
{
code: "const func = ({ param = 123 }) => {}",
options: [{ ignoreDefaultValues: true }],
env: { es6: true }
},
{
code: "const [one = 1, two = 2] = []",
options: [{ ignoreDefaultValues: true }],
env: { es6: true }
},
{
code: "var one, two; [one = 1, two = 2] = []",
options: [{ ignoreDefaultValues: true }],
env: { es6: true }
},
// Optional chaining
{
code: "var x = parseInt?.(y, 10);",
parserOptions: { ecmaVersion: 2020 }
},
{
code: "var x = Number?.parseInt(y, 10);",
parserOptions: { ecmaVersion: 2020 }
},
{
code: "var x = (Number?.parseInt)(y, 10);",
parserOptions: { ecmaVersion: 2020 }
},
{
code: "foo?.[777]",
options: [{ ignoreArrayIndexes: true }],
parserOptions: { ecmaVersion: 2020 }
},
// ignoreClassFieldInitialValues
{
code: "class C { foo = 2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class C { foo = -2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class C { static foo = 2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class C { #foo = 2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 }
},
{
code: "class C { static #foo = 2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 }
}
],
invalid: [
{
code: "var foo = 42",
options: [{
enforceConst: true
}],
env: { es6: true },
errors: [{ messageId: "useConst" }]
},
{
code: "var foo = 0 + 1;",
errors: [
{ messageId: "noMagic", data: { raw: "0" } },
{ messageId: "noMagic", data: { raw: "1" } }
]
},
{
code: "var foo = 42n",
options: [{
enforceConst: true
}],
parserOptions: {
ecmaVersion: 2020
},
errors: [{ messageId: "useConst" }]
},
{
code: "var foo = 0n + 1n;",
parserOptions: {
ecmaVersion: 2020
},
errors: [
{ messageId: "noMagic", data: { raw: "0n" } },
{ messageId: "noMagic", data: { raw: "1n" } }
]
},
{
code: "a = a + 5;",
errors: [
{ messageId: "noMagic", data: { raw: "5" } }
]
},
{
code: "a += 5;",
errors: [
{ messageId: "noMagic", data: { raw: "5" } }
]
},
{
code: "var foo = 0 + 1 + -2 + 2;",
errors: [
{ messageId: "noMagic", data: { raw: "0" } },
{ messageId: "noMagic", data: { raw: "1" } },
{ messageId: "noMagic", data: { raw: "-2" } },
{ messageId: "noMagic", data: { raw: "2" } }
]
},
{
code: "var foo = 0 + 1 + 2;",
options: [{
ignore: [0, 1]
}],
errors: [
{ messageId: "noMagic", data: { raw: "2" } }
]
},
{
code: "var foo = { bar:10 }",
options: [{
detectObjects: true
}],
errors: [
{ messageId: "noMagic", data: { raw: "10" } }
]
}, {
code: "console.log(0x1A + 0x02); console.log(071);",
errors: [
{ messageId: "noMagic", data: { raw: "0x1A" } },
{ messageId: "noMagic", data: { raw: "0x02" } },
{ messageId: "noMagic", data: { raw: "071" } }
]
}, {
code: "var stats = {avg: 42};",
options: [{
detectObjects: true
}],
errors: [
{ messageId: "noMagic", data: { raw: "42" } }
]
}, {
code: "var colors = {}; colors.RED = 2; colors.YELLOW = 3; colors.BLUE = 4 + 5;",
errors: [
{ messageId: "noMagic", data: { raw: "4" } },
{ messageId: "noMagic", data: { raw: "5" } }
]
},
{
code: "function getSecondsInMinute() {return 60;}",
errors: [
{ messageId: "noMagic", data: { raw: "60" } }
]
},
{
code: "function getNegativeSecondsInMinute() {return -60;}",
errors: [
{ messageId: "noMagic", data: { raw: "-60" } }
]
},
{
code: "var Promise = require('bluebird');\n" +
"var MINUTE = 60;\n" +
"var HOUR = 3600;\n" +
"const DAY = 86400;\n" +
"var configObject = {\n" +
"key: 90,\n" +
"another: 10 * 10,\n" +
"10: 'an \"integer\" key'\n" +
"};\n" +
"function getSecondsInDay() {\n" +
" return 24 * HOUR;\n" +
"}\n" +
"function getMillisecondsInDay() {\n" +
"return (getSecondsInDay() *\n" +
"(1000)\n" +
");\n" +
"}\n" +
"function callSetTimeoutZero(func) {\n" +
"setTimeout(func, 0);\n" +
"}\n" +
"function invokeInTen(func) {\n" +
"setTimeout(func, 10);\n" +
"}\n",
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "10" }, line: 7 },
{ messageId: "noMagic", data: { raw: "10" }, line: 7 },
{ messageId: "noMagic", data: { raw: "24" }, line: 11 },
{ messageId: "noMagic", data: { raw: "1000" }, line: 15 },
{ messageId: "noMagic", data: { raw: "0" }, line: 19 },
{ messageId: "noMagic", data: { raw: "10" }, line: 22 }
]
},
{
code: "var data = ['foo', 'bar', 'baz']; var third = data[3];",
errors: [{
messageId: "noMagic", data: { raw: "3" }, line: 1
}]
},
{
code: "var data = ['foo', 'bar', 'baz']; var third = data[3];",
options: [{}],
errors: [{
messageId: "noMagic", data: { raw: "3" }, line: 1
}]
},
{
code: "var data = ['foo', 'bar', 'baz']; var third = data[3];",
options: [{
ignoreArrayIndexes: false
}],
errors: [{
messageId: "noMagic", data: { raw: "3" }, line: 1
}]
},
{
code: "foo[-100]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-100" }, line: 1
}]
},
{
code: "foo[-1.5]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-1.5" }, line: 1
}]
},
{
code: "foo[-1]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-1" }, line: 1
}]
},
{
code: "foo[-0.1]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-0.1" }, line: 1
}]
},
{
code: "foo[-0b110]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2015 },
errors: [{
messageId: "noMagic", data: { raw: "-0b110" }, line: 1
}]
},
{
code: "foo[-0o71]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2015 },
errors: [{
messageId: "noMagic", data: { raw: "-0o71" }, line: 1
}]
},
{
code: "foo[-0x12]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-0x12" }, line: 1
}]
},
{
code: "foo[-012]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-012" }, line: 1
}]
},
{
code: "foo[0.1]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "0.1" }, line: 1
}]
},
{
code: "foo[0.12e1]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "0.12e1" }, line: 1
}]
},
{
code: "foo[1.5]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "1.5" }, line: 1
}]
},
{
code: "foo[1.678e2]", // 167.8
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "1.678e2" }, line: 1
}]
},
{
code: "foo[56e-1]", // 5.6
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "56e-1" }, line: 1
}]
},
{
code: "foo[5.000000000000001]", // doesn't lose precision
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "5.000000000000001" }, line: 1
}]
},
{
code: "foo[100.9]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "100.9" }, line: 1
}]
},
{
code: "foo[4294967295]", // first above the max index
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "4294967295" }, line: 1
}]
},
{
code: "foo[1e300]", // Above the max, and also coerces to "1e+300"
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "1e300" }, line: 1
}]
},
{
code: "foo[1e310]", // refers to property "Infinity"
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "1e310" }, line: 1
}]
},
{
code: "foo[-1e310]", // refers to property "-Infinity"
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-1e310" }, line: 1
}]
},
{
code: "foo[-1n]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "-1n" }, line: 1
}]
},
{
code: "foo[-100n]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "-100n" }, line: 1
}]
},
{
code: "foo[-0x12n]",
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "-0x12n" }, line: 1
}]
},
{
code: "foo[4294967295n]", // first above the max index
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "4294967295n" }, line: 1
}]
},
{
code: "foo[+0]", // Consistent with the default behavior, which doesn't allow: var foo = +0
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "0" }, line: 1
}]
},
{
code: "foo[+1]", // Consistent with the default behavior, which doesn't allow: var foo = +1
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "1" }, line: 1
}]
},
{
code: "foo[-(-1)]", // Consistent with the default behavior, which doesn't allow: var foo = -(-1)
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "-1" }, line: 1
}]
},
{
code: "foo[+0n]", // Consistent with the default behavior, which doesn't allow: var foo = +0n
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "0n" }, line: 1
}]
},
{
code: "foo[+1n]", // Consistent with the default behavior, which doesn't allow: var foo = +1n
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "1n" }, line: 1
}]
},
{
code: "foo[- -1n]", // Consistent with the default behavior, which doesn't allow: var foo = - -1n
options: [{
ignoreArrayIndexes: true
}],
parserOptions: { ecmaVersion: 2020 },
errors: [{
messageId: "noMagic", data: { raw: "-1n" }, line: 1
}]
},
{
code: "100 .toString()",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "100" }, line: 1
}]
},
{
code: "200[100]",
options: [{
ignoreArrayIndexes: true
}],
errors: [{
messageId: "noMagic", data: { raw: "200" }, line: 1
}]
},
{
code: "var a = <div arrayProp={[1,2,3]}></div>;",
parserOptions: {
ecmaFeatures: {
jsx: true
}
},
errors: [
{ messageId: "noMagic", data: { raw: "1" }, line: 1 },
{ messageId: "noMagic", data: { raw: "2" }, line: 1 },
{ messageId: "noMagic", data: { raw: "3" }, line: 1 }
]
},
{
code: "var min, max, mean; min = 1; max = 10; mean = 4;",
options: [{}],
errors: [
{ messageId: "noMagic", data: { raw: "1" }, line: 1 },
{ messageId: "noMagic", data: { raw: "10" }, line: 1 },
{ messageId: "noMagic", data: { raw: "4" }, line: 1 }
]
},
{
code: "f(100n)",
options: [{ ignore: [100] }],
parserOptions: { ecmaVersion: 2020 },
errors: [
{ messageId: "noMagic", data: { raw: "100n" }, line: 1 }
]
},
{
code: "f(-100n)",
options: [{ ignore: ["100n"] }],
parserOptions: { ecmaVersion: 2020 },
errors: [
{ messageId: "noMagic", data: { raw: "-100n" }, line: 1 }
]
},
{
code: "f(100n)",
options: [{ ignore: ["-100n"] }],
parserOptions: { ecmaVersion: 2020 },
errors: [
{ messageId: "noMagic", data: { raw: "100n" }, line: 1 }
]
},
{
code: "f(100)",
options: [{ ignore: ["100n"] }],
errors: [
{ messageId: "noMagic", data: { raw: "100" }, line: 1 }
]
},
{
code: "const func = (param = 123) => {}",
options: [{ ignoreDefaultValues: false }],
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "123" }, line: 1 }
]
},
{
code: "const { param = 123 } = sourceObject;",
options: [{}],
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "123" }, line: 1 }
]
},
{
code: "const { param = 123 } = sourceObject;",
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "123" }, line: 1 }
]
},
{
code: "const { param = 123 } = sourceObject;",
options: [{ ignoreDefaultValues: false }],
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "123" }, line: 1 }
]
},
{
code: "const [one = 1, two = 2] = []",
options: [{ ignoreDefaultValues: false }],
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "1" }, line: 1 },
{ messageId: "noMagic", data: { raw: "2" }, line: 1 }
]
},
{
code: "var one, two; [one = 1, two = 2] = []",
options: [{ ignoreDefaultValues: false }],
env: { es6: true },
errors: [
{ messageId: "noMagic", data: { raw: "1" }, line: 1 },
{ messageId: "noMagic", data: { raw: "2" }, line: 1 }
]
},
// ignoreClassFieldInitialValues
{
code: "class C { foo = 2; }",
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 17 }
]
},
{
code: "class C { foo = 2; }",
options: [{}],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 17 }
]
},
{
code: "class C { foo = 2; }",
options: [{ ignoreClassFieldInitialValues: false }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 17 }
]
},
{
code: "class C { foo = -2; }",
options: [{ ignoreClassFieldInitialValues: false }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "-2" }, line: 1, column: 17 }
]
},
{
code: "class C { static foo = 2; }",
options: [{ ignoreClassFieldInitialValues: false }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 24 }
]
},
{
code: "class C { #foo = 2; }",
options: [{ ignoreClassFieldInitialValues: false }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 18 }
]
},
{
code: "class C { static #foo = 2; }",
options: [{ ignoreClassFieldInitialValues: false }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 25 }
]
},
{
code: "class C { foo = 2 + 3; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 17 },
{ messageId: "noMagic", data: { raw: "3" }, line: 1, column: 21 }
]
},
{
code: "class C { 2; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 11 }
]
},
{
code: "class C { [2]; }",
options: [{ ignoreClassFieldInitialValues: true }],
parserOptions: { ecmaVersion: 2022 },
errors: [
{ messageId: "noMagic", data: { raw: "2" }, line: 1, column: 12 }
]
}
]
});