forked from babel/babel
/
introspection.js
216 lines (196 loc) 路 8.24 KB
/
introspection.js
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import { parse } from "@babel/parser";
import _traverse from "../lib/index.js";
const traverse = _traverse.default;
function getPath(code, options = { sourceType: "script" }) {
const ast = parse(code, options);
let path;
traverse(ast, {
Program: function (_path) {
path = _path;
_path.stop();
},
});
return path;
}
describe("path/introspection", function () {
describe("isInStrictMode", function () {
describe("classes", function () {
it("returns parent's strictness for class", function () {
let program = getPath("class Test extends Super {}");
let klass = program.get("body.0");
expect(klass.isInStrictMode()).toBeFalsy();
program = getPath(`"use strict"; class Test extends Super {}`);
klass = program.get("body.0");
expect(klass.isInStrictMode()).toBeTruthy();
});
it("returns true for class id", function () {
const program = getPath("class Test extends Super {}");
const id = program.get("body.0.id");
expect(id.isInStrictMode()).toBeTruthy();
});
it("returns true for superClass", function () {
const program = getPath("class Test extends Super {}");
const superClass = program.get("body.0.superClass");
expect(superClass.isInStrictMode()).toBeTruthy();
});
it("returns true for method", function () {
const program = getPath("class Test { test() {} }");
const method = program.get("body.0.body.body.0");
expect(method.isInStrictMode()).toBeTruthy();
});
});
describe("program", function () {
describe("when script", function () {
it("returns true when strict", function () {
let program = getPath(`test;`);
expect(program.isInStrictMode()).toBeFalsy();
program = getPath(`"use strict";`);
expect(program.isInStrictMode()).toBeTruthy();
});
});
describe("when module", function () {
it("returns true", function () {
const program = getPath(`test;`, { sourceType: "module" });
expect(program.isInStrictMode()).toBeTruthy();
});
});
});
describe("function", function () {
it("returns parent's strictness for function", function () {
let program = getPath("function test() {}");
let fn = program.get("body.0");
expect(fn.isInStrictMode()).toBeFalsy();
program = getPath(`function test() {"use strict";}`);
fn = program.get("body.0");
expect(fn.isInStrictMode()).toBeFalsy();
program = getPath(`"use strict"; function test() {}`);
fn = program.get("body.0");
expect(fn.isInStrictMode()).toBeTruthy();
});
it("returns function's strictness for id", function () {
let program = getPath("function test(a) {}");
let id = program.get("body.0.id");
expect(id.isInStrictMode()).toBeFalsy();
program = getPath(`function test(a) {"use strict";}`);
id = program.get("body.0.id");
expect(id.isInStrictMode()).toBeTruthy();
});
it("returns function's strictness for parameters", function () {
let program = getPath("function test(a) {}");
let param = program.get("body.0.params.0");
expect(param.isInStrictMode()).toBeFalsy();
program = getPath(`function test(a) {"use strict";}`);
param = program.get("body.0.params.0");
expect(param.isInStrictMode()).toBeTruthy();
});
});
});
describe("referencesImport", function () {
it("accepts a default import", function () {
const program = getPath(`import dep from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "default")).toBe(true);
});
it("rejects a default import from the wrong module", function () {
const program = getPath(`import dep from "wrong-source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "default")).toBe(false);
});
it("rejects a named instead of default import", function () {
const program = getPath(`import { dep } from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "default")).toBe(false);
});
it("accepts a named import", function () {
const program = getPath(`import { dep } from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(true);
});
it("accepts an aliased named import", function () {
const program = getPath(`import { dep as alias } from "source"; alias;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(true);
});
it("accepts a named import via a namespace import member expression", function () {
const program = getPath(`import * as ns from "source"; ns.dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(true);
});
it("accepts a named import via a namespace import optional member expression", function () {
const program = getPath(`import * as ns from "source"; ns?.dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(true);
});
it("accepts a named import via a namespace import computed member expression", function () {
const program = getPath(`import * as ns from "source"; ns["馃槄"];`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "馃槄")).toBe(true);
});
it("accepts a named import via a namespace import jsx member expression", function () {
const program = getPath(`import * as ns from "source"; <ns.dep />;`, {
sourceType: "module",
plugins: ["jsx"],
});
const reference = program.get("body.1.expression.openingElement.name");
expect(reference.referencesImport("source", "dep")).toBe(true);
});
it("rejects a named import from the wrong module", function () {
const program = getPath(`import { dep } from "wrong-source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(false);
});
it("rejects a default instead of named import", function () {
const program = getPath(`import dep from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "dep")).toBe(false);
});
it('rejects the "export called *" trick', function () {
const program = getPath(`import * as ns from "source"; ns["*"].nested;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "nested")).toBe(false);
});
it("accepts a namespace import", function () {
const program = getPath(`import * as dep from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "*")).toBe(true);
});
it("rejects a namespace import from the wrong module", function () {
const program = getPath(`import * as dep from "wrong-source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "*")).toBe(false);
});
it("rejects a default instead of a namespace import", () => {
const program = getPath(`import dep from "source"; dep;`, {
sourceType: "module",
});
const reference = program.get("body.1.expression");
expect(reference.referencesImport("source", "*")).toBe(false);
});
});
});