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no-magic-numbers.test.ts
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no-magic-numbers.test.ts
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import rule from '../../src/rules/no-magic-numbers';
import { RuleTester } from '../RuleTester';
const ruleTester = new RuleTester({
parser: '@typescript-eslint/parser',
});
ruleTester.run('no-magic-numbers', rule, {
valid: [
{
code: 'const FOO = 10;',
options: [{ ignoreNumericLiteralTypes: true }],
},
{
code: "type Foo = 'bar';",
},
{
code: 'type Foo = true;',
},
{
code: 'type Foo = 1;',
options: [{ ignoreNumericLiteralTypes: true }],
},
{
code: 'type Foo = -1;',
options: [{ ignoreNumericLiteralTypes: true }],
},
{
code: 'type Foo = 1 | 2 | 3;',
options: [{ ignoreNumericLiteralTypes: true }],
},
{
code: 'type Foo = 1 | -1;',
options: [{ ignoreNumericLiteralTypes: true }],
},
{
code: `
enum foo {
SECOND = 1000,
NUM = '0123456789',
NEG = -1,
POS = +1,
}
`,
options: [{ ignoreEnums: true }],
},
{
code: `
class Foo {
readonly A = 1;
readonly B = 2;
public static readonly C = 1;
static readonly D = 1;
readonly E = -1;
readonly F = +1;
private readonly G = 100n;
}
`,
options: [{ ignoreReadonlyClassProperties: true }],
},
{
code: 'type Foo = Bar[0];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[-1];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[0xab];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[5.6e1];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[10n];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[1 | -2];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[1 & -2];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[1 & number];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Bar[((1 & -2) | 3) | 4];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: 'type Foo = Parameters<Bar>[2];',
options: [{ ignoreTypeIndexes: true }],
},
{
code: "type Foo = Bar['baz'];",
options: [{ ignoreTypeIndexes: true }],
},
{
code: "type Foo = Bar['baz'];",
options: [{ ignoreTypeIndexes: false }],
},
{
code: `
type Others = [['a'], ['b']];
type Foo = {
[K in keyof Others[0]]: Others[K];
};
`,
options: [{ ignoreTypeIndexes: true }],
},
],
invalid: [
{
code: 'type Foo = 1;',
options: [{ ignoreNumericLiteralTypes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 12,
},
],
},
{
code: 'type Foo = -1;',
options: [{ ignoreNumericLiteralTypes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '-1',
},
line: 1,
column: 12,
},
],
},
{
code: 'type Foo = 1 | 2 | 3;',
options: [{ ignoreNumericLiteralTypes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 12,
},
{
messageId: 'noMagic',
data: {
raw: '2',
},
line: 1,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '3',
},
line: 1,
column: 20,
},
],
},
{
code: 'type Foo = 1 | -1;',
options: [{ ignoreNumericLiteralTypes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 12,
},
{
messageId: 'noMagic',
data: {
raw: '-1',
},
line: 1,
column: 16,
},
],
},
{
code: `
interface Foo {
bar: 1;
}
`,
options: [{ ignoreNumericLiteralTypes: true }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 3,
column: 8,
},
],
},
{
code: `
enum foo {
SECOND = 1000,
NUM = '0123456789',
NEG = -1,
POS = +1,
}
`,
options: [{ ignoreEnums: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1000',
},
line: 3,
column: 12,
},
{
messageId: 'noMagic',
data: {
raw: '-1',
},
line: 5,
column: 9,
},
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 6,
column: 10,
},
],
},
{
code: `
class Foo {
readonly A = 1;
readonly B = 2;
public static readonly C = 3;
static readonly D = 4;
readonly E = -5;
readonly F = +6;
private readonly G = 100n;
}
`,
options: [{ ignoreReadonlyClassProperties: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 3,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '2',
},
line: 4,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '3',
},
line: 5,
column: 30,
},
{
messageId: 'noMagic',
data: {
raw: '4',
},
line: 6,
column: 23,
},
{
messageId: 'noMagic',
data: {
raw: '-5',
},
line: 7,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '6',
},
line: 8,
column: 17,
},
{
messageId: 'noMagic',
data: {
raw: '100n',
},
line: 9,
column: 24,
},
],
},
{
code: 'type Foo = Bar[0];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '0',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[-1];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '-1',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[0xab];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '0xab',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[5.6e1];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '5.6e1',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[10n];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '10n',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[1 | -2];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '-2',
},
line: 1,
column: 20,
},
],
},
{
code: 'type Foo = Bar[1 & -2];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 16,
},
{
messageId: 'noMagic',
data: {
raw: '-2',
},
line: 1,
column: 20,
},
],
},
{
code: 'type Foo = Bar[1 & number];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 16,
},
],
},
{
code: 'type Foo = Bar[((1 & -2) | 3) | 4];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 1,
column: 18,
},
{
messageId: 'noMagic',
data: {
raw: '-2',
},
line: 1,
column: 22,
},
{
messageId: 'noMagic',
data: {
raw: '3',
},
line: 1,
column: 28,
},
{
messageId: 'noMagic',
data: {
raw: '4',
},
line: 1,
column: 33,
},
],
},
{
code: 'type Foo = Parameters<Bar>[2];',
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '2',
},
line: 1,
column: 28,
},
],
},
{
code: `
type Others = [['a'], ['b']];
type Foo = {
[K in keyof Others[0]]: Others[K];
};
`,
options: [{ ignoreTypeIndexes: false }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '0',
},
line: 5,
column: 22,
},
],
},
{
code: `
type Other = {
[0]: 3;
};
type Foo = {
[K in keyof Other]: \`\${K & number}\`;
};
`,
dependencyConstraints: {
typescript: '4.1',
},
options: [{ ignoreTypeIndexes: true }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '0',
},
line: 3,
column: 4,
},
{
messageId: 'noMagic',
data: {
raw: '3',
},
line: 3,
column: 8,
},
],
},
{
code: `
type Foo = {
[K in 0 | 1 | 2]: 0;
};
`,
options: [{ ignoreTypeIndexes: true }],
errors: [
{
messageId: 'noMagic',
data: {
raw: '0',
},
line: 3,
column: 9,
},
{
messageId: 'noMagic',
data: {
raw: '1',
},
line: 3,
column: 13,
},
{
messageId: 'noMagic',
data: {
raw: '2',
},
line: 3,
column: 17,
},
{
messageId: 'noMagic',
data: {
raw: '0',
},
line: 3,
column: 21,
},
],
},
],
});