file-extension-in-import.js

/**
 * @author Toru Nagashima
 * See LICENSE file in root directory for full license.
 */
"use strict"

const path = require("path")
const RuleTester = require("eslint").RuleTester
const rule = require("../../../lib/rules/file-extension-in-import")

function fixture(filename) {
    return path.resolve(
        __dirname,
        "../../fixtures/file-extension-in-import",
        filename
    )
}

new RuleTester({
    parserOptions: {
        ecmaVersion: 2015,
        sourceType: "module",
    },
    settings: {
        node: {
            tryExtensions: [".mjs", ".cjs", ".js", ".json", ".node"],
        },
    },
}).run("file-extension-in-import", rule, {
    valid: [
        {
            filename: fixture("test.js"),
            code: "import 'eslint'",
        },
        {
            filename: fixture("test.js"),
            code: "import '@typescript-eslint/parser'",
        },
        {
            filename: fixture("test.js"),
            code: "import '@typescript-eslint\\parser'",
        },
        {
            filename: fixture("test.js"),
            code: "import 'punycode/'",
        },
        {
            filename: fixture("test.js"),
            code: "import 'xxx'",
        },
        {
            filename: fixture("test.js"),
            code: "import './a.js'",
        },
        {
            filename: fixture("test.js"),
            code: "import './b.json'",
        },
        {
            filename: fixture("test.js"),
            code: "import './c.mjs'",
        },
        {
            filename: fixture("test.js"),
            code: "import './a.js'",
            options: ["always"],
        },
        {
            filename: fixture("test.js"),
            code: "import './b.json'",
            options: ["always"],
        },
        {
            filename: fixture("test.js"),
            code: "import './c.mjs'",
            options: ["always"],
        },
        {
            filename: fixture("test.js"),
            code: "import './a'",
            options: ["never"],
        },
        {
            filename: fixture("test.js"),
            code: "import './b'",
            options: ["never"],
        },
        {
            filename: fixture("test.js"),
            code: "import './c'",
            options: ["never"],
        },
        {
            filename: fixture("test.js"),
            code: "import './a'",
            options: ["always", { ".js": "never" }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b.json'",
            options: ["always", { ".js": "never" }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c.mjs'",
            options: ["always", { ".js": "never" }],
        },
        {
            filename: fixture("test.js"),
            code: "import './a'",
            options: ["never", { ".json": "always" }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b.json'",
            options: ["never", { ".json": "always" }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c'",
            options: ["never", { ".json": "always" }],
        },
    ],
    invalid: [
        {
            filename: fixture("test.js"),
            code: "import './a'",
            output: "import './a.js'",
            errors: [{ messageId: "requireExt", data: { ext: ".js" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b'",
            output: "import './b.json'",
            errors: [{ messageId: "requireExt", data: { ext: ".json" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c'",
            output: "import './c.mjs'",
            errors: [{ messageId: "requireExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './a'",
            output: "import './a.js'",
            options: ["always"],
            errors: [{ messageId: "requireExt", data: { ext: ".js" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b'",
            output: "import './b.json'",
            options: ["always"],
            errors: [{ messageId: "requireExt", data: { ext: ".json" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c'",
            output: "import './c.mjs'",
            options: ["always"],
            errors: [{ messageId: "requireExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './a.js'",
            output: "import './a'",
            options: ["never"],
            errors: [{ messageId: "forbidExt", data: { ext: ".js" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b.json'",
            output: "import './b'",
            options: ["never"],
            errors: [{ messageId: "forbidExt", data: { ext: ".json" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c.mjs'",
            output: "import './c'",
            options: ["never"],
            errors: [{ messageId: "forbidExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './a.js'",
            output: "import './a'",
            options: ["always", { ".js": "never" }],
            errors: [{ messageId: "forbidExt", data: { ext: ".js" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b'",
            output: "import './b.json'",
            options: ["always", { ".js": "never" }],
            errors: [{ messageId: "requireExt", data: { ext: ".json" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c'",
            output: "import './c.mjs'",
            options: ["always", { ".js": "never" }],
            errors: [{ messageId: "requireExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './a.js'",
            output: "import './a'",
            options: ["never", { ".json": "always" }],
            errors: [{ messageId: "forbidExt", data: { ext: ".js" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './b'",
            output: "import './b.json'",
            options: ["never", { ".json": "always" }],
            errors: [{ messageId: "requireExt", data: { ext: ".json" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './c.mjs'",
            output: "import './c'",
            options: ["never", { ".json": "always" }],
            errors: [{ messageId: "forbidExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './multi'",
            output: null,
            options: ["always"],
            errors: [{ messageId: "requireExt", data: { ext: ".mjs" } }],
        },
        {
            filename: fixture("test.js"),
            code: "import './multi.cjs'",
            output: null,
            options: ["never"],
            errors: [{ messageId: "forbidExt", data: { ext: ".cjs" } }],
        },
    ],
})