/
no-unused-vars-experimental.test.ts
1369 lines (1358 loc) · 26.5 KB
/
no-unused-vars-experimental.test.ts
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import {
InvalidTestCase,
ValidTestCase,
} from '@typescript-eslint/experimental-utils/dist/ts-eslint';
import rule, {
DEFAULT_IGNORED_REGEX_STRING,
Options,
MessageIds,
} from '../../src/rules/no-unused-vars-experimental';
import { RuleTester, getFixturesRootDir } from '../RuleTester';
const rootDir = getFixturesRootDir();
const ruleTester = new RuleTester({
parserOptions: {
ecmaVersion: 2018,
sourceType: 'module',
},
parser: '@typescript-eslint/parser',
});
const hasExport = /^export/m;
// const hasImport = /^import .+? from ['"]/m;
function makeExternalModule<
T extends ValidTestCase<Options> | InvalidTestCase<MessageIds, Options>
>(tests: T[]): T[] {
return tests.map(t => {
if (!hasExport.test(t.code)) {
return {
...t,
code: `${t.code}\nexport const __externalModule = 1;`,
};
}
return t;
});
}
const DEFAULT_IGNORED_REGEX = new RegExp(
DEFAULT_IGNORED_REGEX_STRING,
).toString();
ruleTester.run('no-unused-vars-experimental', rule, {
valid: makeExternalModule([
///////////////////////
// #region variables //
///////////////////////
{ code: 'const _x = "unused"' },
{ code: 'export const x = "used";' },
{
code: `
const x = "used";
console.log(x);
`,
},
{
code: `
function foo() {}
foo();
`,
},
{ code: 'function _foo() {}' },
{
// decorators require the tsconfig compiler option
// or else they are marked as unused because it is not a valid usage
code: `
function decorator(_clazz: any) {}
@decorator
export class Foo {}
`,
parser: require.resolve('@typescript-eslint/parser'),
parserOptions: {
project: './tsconfig.json',
tsconfigRootDir: rootDir,
},
},
{
code: `
type Foo = { a?: string };
export const foo: Foo = {};
`,
},
{
code: `
interface Foo { a?: string };
export const foo: Foo = {};
`,
},
{ code: 'type _Foo = { a?: string };' },
{ code: 'interface _Foo { a?: string };' },
{
code: `
class Foo {}
new Foo();
`,
},
{ code: 'class _Foo {}' },
{
code: `
export class Foo {
private foo: string;
bar() {
console.log(this.foo);
}
}
`,
},
{
code: `
export class Foo {
private _foo: string;
}
`,
},
{
code: `
export class Foo {
private foo() {};
bar() {
this.foo();
}
}
`,
},
{
code: `
export class Foo {
private _foo() {};
}
`,
},
{
code: `
enum Foo { a = 1 }
console.log(Foo.a);
`,
},
{ code: 'enum _Foo { a = 1 }' },
{ code: 'export const {a, b} = c;' },
{
code: `
const {a, b: {c}} = d;
console.log(a, c);
`,
},
{
code: `
const {a, b} = c;
console.log(a, b);
`,
},
{
code: `
const {a: _a, b} = c;
console.log(b);
`,
},
{ code: `const {a: _a, b: _b} = c;` },
{ code: 'export const [a, b] = c;' },
{
code: `
const [a, b] = c;
console.log(a, b);
`,
},
{
code: `
const [a, [b]] = c;
console.log(a, b);
`,
},
{
code: `
const [_a, b] = c;
console.log(b);
`,
},
{ code: `const [_a, _b] = c;` },
// #endregion variables //
//////////////////////////
////////////////////////
// #region parameters //
////////////////////////
{
code: `
export function foo(a) {
console.log(a);
}
`,
},
{
code: `
export function foo(a: string, b: string) {
console.log(b);
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export class Clazz {
constructor(a: string, public b: string) {}
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export class Clazz {
constructor(private a: string, public b: string) {}
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export class Clazz {
constructor(private a: string) {}
foo() { console.log(this.a) }
}
`,
},
{ code: 'export function foo({a: _a}) {}' },
{ code: 'export function foo({a: { b: _b }}) {}' },
{ code: 'export function foo([_a]) {}' },
{ code: 'export function foo([[_a]]) {}' },
{
code: `
export function foo({a: _a}, used) {
console.log(used);
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export function foo({a: { b: _b }}, used) {
console.log(used);
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export function foo([_a], used) {
console.log(used);
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
{
code: `
export function foo([[_a]], used) {
console.log(used);
}
`,
options: [
{
ignoreArgsIfArgsAfterAreUsed: true,
},
],
},
// #endregion parameters //
///////////////////////////
////////////////////
// #region import //
////////////////////
{
code: `
import defaultImp from "thing";
console.log(defaultImp);
`,
},
{
code: `
import { named } from "thing";
console.log(named);
`,
},
{
code: `
import defaultImp, { named } from "thing";
console.log(defaultImp, named);
`,
},
{
code: `
import defaultImp = require("thing");
console.log(defaultImp, named);
`,
},
{
code: `
import * as namespace from "thing";
console.log(namespace);
`,
},
{
code: `
import defaultImp, * as namespace from "thing";
console.log(defaultImp, namespace);
`,
},
{ code: 'import _defaultImp from "thing";' },
{ code: 'import { named as _named } from "thing";' },
{ code: 'import _defaultImp, { named as _named } from "thing";' },
{ code: 'import _defaultImp = require("thing");' },
{ code: 'import * as _namespace from "thing";' },
{ code: 'import _defaultImp, * as _namespace from "thing";' },
// #endregion import //
///////////////////////
//////////////////////
// #region generics //
//////////////////////
{ code: 'export function foo<T>(): T {}' },
{ code: 'export function foo<T, T2>(): T & T2 {}' },
{ code: 'export function foo<T, _T2>(): T {}' },
{
code: `
export class foo<T> {
prop: T
}
`,
},
{
code: `
export class foo<T, T2> {
prop: T
prop2: T2
}
`,
},
{
code: `
export class foo<T, _T2> {
prop: T
prop2: T2
}
`,
},
{
code: `
export interface foo<T> {
prop: T
}
`,
},
{
code: `
export interface foo<T, T2> {
prop: T
prop2: T2
}
`,
},
{
code: `
export interface foo<T, _T2> {
prop: T
prop2: T2
}
`,
},
{
code: `
export type foo<T> = {
prop: T
}
`,
},
{
code: `
export type foo<T, T2> = {
prop: T
prop2: T2
}
`,
},
{
code: `
export type foo<T, _T2> = {
prop: T
prop2: T2
}
`,
},
// #endregion generics //
/////////////////////////
]),
invalid: makeExternalModule([
///////////////////////
// #region variables //
///////////////////////
{
code: 'const x = "unused"',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'x',
type: 'Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 7,
endColumn: 8,
},
],
},
{
code: 'const x: string = "unused"',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'x',
type: 'Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 7,
endColumn: 16,
},
],
},
{
code: 'const x = "unused"',
options: [
{
ignoredNamesRegex: false,
},
],
errors: [
{
messageId: 'unused',
data: {
name: 'x',
type: 'Variable',
},
line: 1,
column: 7,
endColumn: 8,
},
],
},
{
code: 'function foo() {}',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Function',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 10,
endColumn: 13,
},
],
},
{
code: 'type Foo = { a?: string };',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'Foo',
type: 'Type',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 6,
endColumn: 9,
},
],
},
{
code: 'interface Foo { a?: string };',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'Foo',
type: 'Interface',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 11,
endColumn: 14,
},
],
},
{
code: 'class Foo {}',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'Foo',
type: 'Class',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 7,
endColumn: 10,
},
],
},
{
code: `
export class Foo {
private foo: string;
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
// eslint-disable-next-line @typescript-eslint/internal/prefer-ast-types-enum
type: 'Property',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 3,
column: 11,
endColumn: 14,
},
],
},
{
code: `
export class Foo {
private foo() {};
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Method',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 3,
column: 11,
endColumn: 14,
},
],
},
{
code: 'enum Foo { a = 1 }',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'Foo',
type: 'Enum',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 6,
endColumn: 9,
},
],
},
{
code: `
const {foo, bar} = baz;
console.log(foo);
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'bar',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 13,
endColumn: 16,
},
],
},
{
code: `
const [foo, bar] = baz;
console.log(foo);
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'bar',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 13,
endColumn: 16,
},
],
},
{
code: 'const {foo, bar} = baz;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'bar',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 13,
endColumn: 16,
},
],
},
{
code: 'const {foo, bar: _bar} = baz;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
],
},
{
code: 'const [foo, bar] = baz;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'bar',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 13,
endColumn: 16,
},
],
},
{
code: 'const [foo, _bar] = baz;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
],
},
{
code: 'const [foo, [bar]] = baz;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'bar',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 14,
endColumn: 17,
},
],
},
{
code: 'const {foo, bar: {baz}} = bam;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'baz',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 19,
endColumn: 22,
},
],
},
{
code: 'const {foo, bar: [baz]} = bam;',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'baz',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 19,
endColumn: 22,
},
],
},
// #endregion variables //
//////////////////////////
////////////////////////
// #region parameters //
////////////////////////
{
code: `
export function foo(a, b) {
console.log(b);
}
`,
errors: [
{
messageId: 'unused',
data: {
name: 'a',
type: 'Parameter',
},
line: 2,
column: 21,
endColumn: 22,
},
],
},
{
code: `
export function foo(a: string, b: string) {
console.log(b);
}
`,
errors: [
{
messageId: 'unused',
data: {
name: 'a',
type: 'Parameter',
},
line: 2,
column: 21,
endColumn: 30,
},
],
},
{
code: `
export class Clazz {
constructor(a: string, b: string) {
console.log(b);
}
}
`,
errors: [
{
messageId: 'unused',
data: {
name: 'a',
type: 'Parameter',
},
line: 3,
column: 15,
endColumn: 24,
},
],
},
{
code: `
export class Clazz {
constructor(a: string, public b: string) {}
}
`,
errors: [
{
messageId: 'unused',
data: {
name: 'a',
type: 'Parameter',
},
line: 3,
column: 15,
endColumn: 24,
},
],
},
{
code: `
export function foo({a}, used) {
console.log(used);
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'a',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 22,
endColumn: 23,
},
],
},
{
code: `
export function foo({a: {b}}, used) {
console.log(used);
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'b',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 26,
endColumn: 27,
},
],
},
{
code: `
export function foo([a], used) {
console.log(used);
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'a',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 22,
endColumn: 23,
},
],
},
{
code: `
export function foo([[a]], used) {
console.log(used);
}
`,
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'a',
type: 'Destructured Variable',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 2,
column: 23,
endColumn: 24,
},
],
},
// #endregion parameters //
///////////////////////////
////////////////////
// #region import //
////////////////////
{
code: 'import foo = require("test")',
errors: [
{
messageId: 'unusedWithIgnorePattern',
data: {
name: 'foo',
// eslint-disable-next-line @typescript-eslint/internal/prefer-ast-types-enum
type: 'Import',
pattern: DEFAULT_IGNORED_REGEX,
},
line: 1,
column: 8,
endColumn: 11,
},
],
},
{
code: 'import defaultImp from "thing";',
errors: [
{
messageId: 'unusedImport',
line: 1,
column: 1,
endColumn: 32,
},
],
},
{
code: 'import { named } from "thing";',
errors: [
{
messageId: 'unusedImport',