no-relative-packages.js

import { RuleTester } from 'eslint';
import rule from 'rules/no-relative-packages';
import { normalize } from 'path';

import { test, testFilePath } from '../utils';

const ruleTester = new RuleTester();

ruleTester.run('no-relative-packages', rule, {
  valid: [
    test({
      code: 'import foo from "./index.js"',
      filename: testFilePath('./package/index.js'),
    }),
    test({
      code: 'import bar from "../bar"',
      filename: testFilePath('./package/index.js'),
    }),
    test({
      code: 'import {foo} from "a"',
      filename: testFilePath('./package-named/index.js'),
    }),
    test({
      code: 'const bar = require("../bar.js")',
      filename: testFilePath('./package/index.js'),
    }),
    test({
      code: 'const bar = require("../not/a/file/path.js")',
      filename: testFilePath('./package/index.js'),
    }),
    test({
      code: 'import "package"',
      filename: testFilePath('./package/index.js'),
    }),
    test({
      code: 'require("../bar.js")',
      filename: testFilePath('./package/index.js'),
    }),
  ],

  invalid: [
    test({
      code: 'import foo from "./package-named"',
      filename: testFilePath('./bar.js'),
      errors: [ {
        message: 'Relative import from another package is not allowed. Use `package-named` instead of `./package-named`',
        line: 1,
        column: 17,
      } ],
    }),
    test({
      code: 'import foo from "../package-named"',
      filename: testFilePath('./package/index.js'),
      errors: [ {
        message: 'Relative import from another package is not allowed. Use `package-named` instead of `../package-named`',
        line: 1,
        column: 17,
      } ],
    }),
    test({
      code: 'import foo from "../package-scoped"',
      filename: testFilePath('./package/index.js'),
      errors: [ {
        message: `Relative import from another package is not allowed. Use \`${normalize('@scope/package-named')}\` instead of \`../package-scoped\``,
        line: 1,
        column: 17,
      } ],
    }),
    test({
      code: 'import bar from "../bar"',
      filename: testFilePath('./package-named/index.js'),
      errors: [ {
        message: `Relative import from another package is not allowed. Use \`${normalize('eslint-plugin-import/tests/files/bar')}\` instead of \`../bar\``,
        line: 1,
        column: 17,
      } ],
    }),
  ],
});