584 lines
13 KiB
JavaScript
584 lines
13 KiB
JavaScript
import path from "path";
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import escope from "eslint-scope";
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import unpad from "dedent";
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import { parseForESLint } from "../src";
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const BABEL_OPTIONS = {
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configFile: require.resolve(
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"../../babel-eslint-shared-fixtures/config/babel.config.js",
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),
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};
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const PROPS_TO_REMOVE = [
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"importKind",
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"exportKind",
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"variance",
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"typeArguments",
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];
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function deeplyRemoveProperties(obj, props) {
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for (const [k, v] of Object.entries(obj)) {
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if (typeof v === "object") {
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if (Array.isArray(v)) {
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for (const el of v) {
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if (el != null) {
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deeplyRemoveProperties(el, props);
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}
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}
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}
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if (props.includes(k)) {
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delete obj[k];
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} else if (v != null) {
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deeplyRemoveProperties(v, props);
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}
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continue;
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}
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if (props.includes(k)) {
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delete obj[k];
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}
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}
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}
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describe("Babel and Espree", () => {
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let espree;
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function parseAndAssertSame(code) {
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code = unpad(code);
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const espreeAST = espree.parse(code, {
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ecmaFeatures: {
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// enable JSX parsing
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jsx: true,
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// enable return in global scope
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globalReturn: true,
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// enable implied strict mode (if ecmaVersion >= 5)
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impliedStrict: true,
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// allow experimental object rest/spread
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experimentalObjectRestSpread: true,
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},
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tokens: true,
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loc: true,
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range: true,
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comment: true,
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ecmaVersion: 2021,
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sourceType: "module",
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});
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const babelAST = parseForESLint(code, {
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eslintVisitorKeys: true,
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eslintScopeManager: true,
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babelOptions: BABEL_OPTIONS,
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}).ast;
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deeplyRemoveProperties(babelAST, PROPS_TO_REMOVE);
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expect(babelAST).toEqual(espreeAST);
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}
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beforeAll(async () => {
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// Use the version of Espree that is a dependency of
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// the version of ESLint we are testing against.
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const espreePath = require.resolve("espree", {
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paths: [path.dirname(require.resolve("eslint"))],
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});
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espree = require(espreePath);
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});
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describe("compatibility", () => {
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it("should allow ast.analyze to be called without options", function () {
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const ast = parseForESLint("`test`", {
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eslintScopeManager: true,
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eslintVisitorKeys: true,
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babelOptions: BABEL_OPTIONS,
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}).ast;
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expect(() => {
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escope.analyze(ast);
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}).not.toThrow(new TypeError("Should allow no options argument."));
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});
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});
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describe("templates", () => {
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it("empty template string", () => {
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parseAndAssertSame("``");
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});
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it("template string", () => {
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parseAndAssertSame("`test`");
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});
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it("template string using $", () => {
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parseAndAssertSame("`$`");
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});
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it("template string with expression", () => {
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parseAndAssertSame("`${a}`");
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});
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it("template string with multiple expressions", () => {
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parseAndAssertSame("`${a}${b}${c}`");
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});
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it("template string with expression and strings", () => {
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parseAndAssertSame("`a${a}a`");
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});
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it("template string with binary expression", () => {
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parseAndAssertSame("`a${a + b}a`");
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});
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it("tagged template", () => {
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parseAndAssertSame("jsx`<Button>Click</Button>`");
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});
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it("tagged template with expression", () => {
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parseAndAssertSame("jsx`<Button>Hi ${name}</Button>`");
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});
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it("tagged template with new operator", () => {
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parseAndAssertSame("new raw`42`");
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});
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it("template with nested function/object", () => {
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parseAndAssertSame(
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"`outer${{x: {y: 10}}}bar${`nested${function(){return 1;}}endnest`}end`",
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);
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});
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it("template with braces inside and outside of template string #96", () => {
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parseAndAssertSame(
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"if (a) { var target = `{}a:${webpackPort}{}}}}`; } else { app.use(); }",
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);
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});
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it("template also with braces #96", () => {
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parseAndAssertSame(`
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export default function f1() {
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function f2(foo) {
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const bar = 3;
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return \`\${foo} \${bar}\`;
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}
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return f2;
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}
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`);
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});
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it("template with destructuring #31", () => {
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parseAndAssertSame(`
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module.exports = {
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render() {
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var {name} = this.props;
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return Math.max(null, \`Name: \${name}, Name: \${name}\`);
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}
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};
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`);
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});
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it("template with arrow returning template #603", () => {
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parseAndAssertSame(`
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var a = \`\${() => {
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\`\${''}\`
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}}\`;
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`);
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});
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it("template string with object with template string inside", () => {
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parseAndAssertSame("`${ { a:`${2}` } }`");
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});
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});
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it("simple expression", () => {
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parseAndAssertSame("a = 1");
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});
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it("logical NOT", () => {
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parseAndAssertSame("!0");
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});
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it("bitwise NOT", () => {
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parseAndAssertSame("~0");
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});
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it("class declaration", () => {
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parseAndAssertSame("class Foo {}");
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});
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it("class expression", () => {
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parseAndAssertSame("var a = class Foo {}");
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});
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it("jsx expression", () => {
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parseAndAssertSame("<App />");
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});
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it("jsx expression with 'this' as identifier", () => {
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parseAndAssertSame("<this />");
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});
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it("jsx expression with a dynamic attribute", () => {
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parseAndAssertSame("<App foo={bar} />");
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});
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it("jsx expression with a member expression as identifier", () => {
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parseAndAssertSame("<foo.bar />");
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});
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it("jsx expression with spread", () => {
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parseAndAssertSame("var myDivElement = <div {...this.props} />;");
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});
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it("empty jsx text", () => {
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parseAndAssertSame("<a></a>");
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});
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it("jsx text with content", () => {
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parseAndAssertSame("<a>Hello, world!</a>");
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});
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it("nested jsx", () => {
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parseAndAssertSame("<div>\n<h1>Wat</h1>\n</div>");
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});
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it("default import", () => {
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parseAndAssertSame('import foo from "foo";');
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});
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it("import specifier", () => {
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parseAndAssertSame('import { foo } from "foo";');
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});
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it("import specifier with name", () => {
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parseAndAssertSame('import { foo as bar } from "foo";');
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});
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it("import bare", () => {
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parseAndAssertSame('import "foo";');
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});
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it("import meta", () => {
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parseAndAssertSame("const url = import.meta.url");
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});
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it("export default class declaration", () => {
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parseAndAssertSame("export default class Foo {}");
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});
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it("export default class expression", () => {
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parseAndAssertSame("export default class {}");
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});
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it("export default function declaration", () => {
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parseAndAssertSame("export default function Foo() {}");
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});
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it("export default function expression", () => {
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parseAndAssertSame("export default function () {}");
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});
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it("export all", () => {
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parseAndAssertSame('export * from "foo";');
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});
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it("export * as ns", () => {
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parseAndAssertSame('export * as Foo from "foo";');
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});
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it("export named", () => {
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parseAndAssertSame("var foo = 1;export { foo };");
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});
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it("export named alias", () => {
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parseAndAssertSame("var foo = 1;export { foo as bar };");
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});
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it("optional chaining operator", () => {
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parseAndAssertSame("foo?.bar?.().qux()");
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});
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it("nullish coalescing operator", () => {
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parseAndAssertSame("foo ?? bar");
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});
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it("logical assignment", () => {
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parseAndAssertSame("foo ??= bar &&= qux ||= quux");
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});
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it("numeric separator", () => {
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parseAndAssertSame("1_0.0_0e0_1");
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});
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// Espree doesn't support the pipeline operator yet
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it("pipeline operator (token)", () => {
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const code = "foo |> bar";
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const babylonAST = parseForESLint(code, {
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eslintVisitorKeys: true,
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eslintScopeManager: true,
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babelOptions: BABEL_OPTIONS,
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}).ast;
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expect(babylonAST.tokens[1].type).toEqual("Punctuator");
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});
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// Espree doesn't support private fields yet
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it("hash (token)", () => {
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const code = "class A { #x }";
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const babylonAST = parseForESLint(code, {
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eslintVisitorKeys: true,
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eslintScopeManager: true,
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babelOptions: BABEL_OPTIONS,
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}).ast;
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expect(babylonAST.tokens[3].type).toEqual("Punctuator");
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expect(babylonAST.tokens[3].value).toEqual("#");
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});
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it("empty program with line comment", () => {
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parseAndAssertSame("// single comment");
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});
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it("empty program with block comment", () => {
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parseAndAssertSame(" /* multiline\n * comment\n*/");
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});
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it("line comments", () => {
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parseAndAssertSame(`
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// single comment
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var foo = 15; // comment next to statement
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// second comment after statement
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`);
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});
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it("block comments", () => {
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parseAndAssertSame(`
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/* single comment */
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var foo = 15; /* comment next to statement */
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/*
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* multiline
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* comment
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*/
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`);
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});
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it("block comments #124", () => {
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parseAndAssertSame(`
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React.createClass({
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render() {
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// return (
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// <div />
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// ); // <-- this is the line that is reported
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}
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});
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`);
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});
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it("null", () => {
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parseAndAssertSame("null");
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});
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it("boolean", () => {
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parseAndAssertSame("if (true) {} else if (false) {}");
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});
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it("regexp", () => {
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parseAndAssertSame("/affix-top|affix-bottom|affix|[a-z]/");
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});
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it("regexp", () => {
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parseAndAssertSame("const foo = /foo/;");
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});
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it("regexp y flag", () => {
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parseAndAssertSame("const foo = /foo/y;");
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});
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it("regexp u flag", () => {
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parseAndAssertSame("const foo = /foo/u;");
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});
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it("regexp in a template string", () => {
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parseAndAssertSame('`${/\\d/.exec("1")[0]}`');
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});
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it("first line is empty", () => {
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parseAndAssertSame('\nimport Immutable from "immutable";');
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});
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it("empty", () => {
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parseAndAssertSame("");
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});
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it("jsdoc", () => {
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parseAndAssertSame(`
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/**
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* @param {object} options
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* @return {number}
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*/
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const test = function({ a, b, c }) {
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return a + b + c;
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};
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module.exports = test;
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`);
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});
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it("empty block with comment", () => {
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parseAndAssertSame(`
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function a () {
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try {
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b();
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} catch (e) {
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// asdf
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}
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}
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`);
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});
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describe("babel tests", () => {
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it("MethodDefinition", () => {
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parseAndAssertSame(`
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export default class A {
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a() {}
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}
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`);
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});
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it("MethodDefinition 2", () => {
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parseAndAssertSame(
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"export default class Bar { get bar() { return 42; }}",
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);
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});
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it("ClassMethod", () => {
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parseAndAssertSame(`
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class A {
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constructor() {
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}
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}
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`);
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});
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it("ClassMethod multiple params", () => {
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parseAndAssertSame(`
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class A {
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constructor(a, b, c) {
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}
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}
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`);
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});
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it("ClassMethod multiline", () => {
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parseAndAssertSame(`
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class A {
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constructor (
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a,
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b,
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c
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)
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{
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}
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}
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`);
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});
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it("ClassMethod oneline", () => {
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parseAndAssertSame("class A { constructor(a, b, c) {} }");
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});
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it("ObjectMethod", () => {
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parseAndAssertSame(`
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var a = {
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b(c) {
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}
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}
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`);
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});
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it("do not allow import export everywhere", () => {
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expect(() => {
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parseAndAssertSame('function F() { import a from "a"; }');
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}).toThrow(
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new SyntaxError(
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"'import' and 'export' may only appear at the top level",
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),
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);
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});
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it("return outside function", () => {
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parseAndAssertSame("return;");
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});
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it("super outside method", () => {
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expect(() => {
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parseAndAssertSame("function F() { super(); }");
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}).toThrow(new SyntaxError("'super' keyword outside a method"));
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});
|
|
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it("StringLiteral", () => {
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parseAndAssertSame("");
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parseAndAssertSame("");
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parseAndAssertSame("a");
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});
|
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it("getters and setters", () => {
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parseAndAssertSame("class A { get x ( ) { ; } }");
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parseAndAssertSame(`
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class A {
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get x(
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)
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{
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;
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}
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}
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`);
|
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parseAndAssertSame("class A { set x (a) { ; } }");
|
|
parseAndAssertSame(`
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class A {
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|
set x(a
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)
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|
{
|
|
;
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|
}
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|
}
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|
`);
|
|
parseAndAssertSame(`
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|
var B = {
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|
get x () {
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|
return this.ecks;
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|
},
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|
set x (ecks) {
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this.ecks = ecks;
|
|
}
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|
};
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|
`);
|
|
});
|
|
|
|
it("RestOperator", () => {
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|
parseAndAssertSame("var { a, ...b } = c");
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|
parseAndAssertSame("var [ a, ...b ] = c");
|
|
parseAndAssertSame("var a = function (...b) {}");
|
|
});
|
|
|
|
it("SpreadOperator", () => {
|
|
parseAndAssertSame("var a = { b, ...c }");
|
|
parseAndAssertSame("var a = [ a, ...b ]");
|
|
parseAndAssertSame("var a = sum(...b)");
|
|
});
|
|
|
|
it("Async/Await", () => {
|
|
parseAndAssertSame(`
|
|
async function a() {
|
|
await 1;
|
|
}
|
|
`);
|
|
});
|
|
|
|
it("BigInt", () => {
|
|
parseAndAssertSame(`
|
|
const a = 1n;
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|
`);
|
|
});
|
|
|
|
it("Dynamic Import", () => {
|
|
parseAndAssertSame(`
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|
const a = import(moduleName);
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|
`);
|
|
});
|
|
});
|
|
});
|