521 lines
25 KiB
JavaScript
521 lines
25 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const fc = require("fast-check");
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const semver_1 = require("semver");
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const index_1 = require("./index");
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// Evaluate a string into JavaScript
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const evalValue = (str) => {
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// tslint:disable-next-line no-eval
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return eval(`(${str})`);
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};
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/**
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* Create a quick test function wrapper.
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*/
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function test(value, result, indent, options) {
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return () => {
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expect(index_1.stringify(value, null, indent, options)).toEqual(result);
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};
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}
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/**
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* Create a wrapper for round-trip eval tests.
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*/
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function testRoundTrip(expression, indent, options) {
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return () => test(evalValue(expression), expression, indent, options)();
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}
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/**
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* Check if syntax is supported.
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*/
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function isSupported(expr) {
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try {
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// tslint:disable-next-line no-eval
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eval(expr);
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return true;
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}
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catch (err) {
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if (err.name === "SyntaxError")
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return false;
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throw err;
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}
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}
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/**
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* Generate a list of test cases to run.
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*/
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function cases(cases) {
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return () => {
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for (const value of cases) {
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if (value)
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it(value, testRoundTrip(value));
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}
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};
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}
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/**
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* Conditionally execute test cases.
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*/
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function describeIf(description, condition, fn) {
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return condition ? describe(description, fn) : describe.skip(description, fn);
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}
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describe("javascript-stringify", () => {
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describe("types", () => {
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describe("booleans", () => {
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it("should be stringified", test(true, "true"));
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});
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describe("strings", () => {
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it("should wrap in single quotes", test("string", "'string'"));
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it("should escape quote characters", test("'test'", "'\\'test\\''"));
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it("should escape control characters", test("multi\nline", "'multi\\nline'"));
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it("should escape back slashes", test("back\\slash", "'back\\\\slash'"));
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it("should escape certain unicode sequences", test("\u0602", "'\\u0602'"));
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});
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describe("numbers", () => {
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it("should stringify integers", test(10, "10"));
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it("should stringify floats", test(10.5, "10.5"));
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it('should stringify "NaN"', test(10.5, "10.5"));
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it('should stringify "Infinity"', test(Infinity, "Infinity"));
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it('should stringify "-Infinity"', test(-Infinity, "-Infinity"));
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it('should stringify "-0"', test(-0, "-0"));
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});
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describe("arrays", () => {
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it("should stringify as array shorthand", test([1, 2, 3], "[1,2,3]"));
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it("should indent elements", test([{ x: 10 }], "[\n\t{\n\t\tx: 10\n\t}\n]", "\t"));
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});
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describe("objects", () => {
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it("should stringify as object shorthand", test({ key: "value", "-": 10 }, "{key:'value','-':10}"));
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it("should stringify undefined keys", test({ a: true, b: undefined }, "{a:true,b:undefined}"));
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it("should stringify omit undefined keys", test({ a: true, b: undefined }, "{a:true}", null, {
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skipUndefinedProperties: true
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}));
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it("should quote reserved word keys", test({ if: true, else: false }, "{'if':true,'else':false}"));
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it("should not quote Object.prototype keys", test({ constructor: 1, toString: 2 }, "{constructor:1,toString:2}"));
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});
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describe("functions", () => {
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it("should reindent function bodies", test(evalValue(`function() {
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if (true) {
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return "hello";
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}
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}`), 'function () {\n if (true) {\n return "hello";\n }\n}', 2));
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it("should reindent function bodies in objects", test(evalValue(`
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{
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fn: function() {
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if (true) {
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return "hello";
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}
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}
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}
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`), '{\n fn: function () {\n if (true) {\n return "hello";\n }\n }\n}', 2));
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it("should reindent function bodies in arrays", test(evalValue(`[
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function() {
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if (true) {
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return "hello";
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}
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}
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]`), '[\n function () {\n if (true) {\n return "hello";\n }\n }\n]', 2));
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it("should not need to reindent one-liners", testRoundTrip("{\n fn: function () { return; }\n}", 2));
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it("should gracefully handle unexpected Function.toString formats", () => {
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const origToString = Function.prototype.toString;
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Function.prototype.toString = () => "{nope}";
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try {
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expect(index_1.stringify(function () {
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/* Empty */
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})).toEqual("void '{nope}'");
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}
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finally {
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Function.prototype.toString = origToString;
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}
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});
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describe("omit the names of their keys", cases(["{name:function () {}}", "{'tricky name':function () {}}"]));
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});
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describe("native instances", () => {
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describe("Date", () => {
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const date = new Date();
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it("should stringify", test(date, "new Date(" + date.getTime() + ")"));
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});
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describe("RegExp", () => {
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it("should stringify as shorthand", test(/[abc]/gi, "/[abc]/gi"));
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});
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describe("Number", () => {
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it("should stringify", test(new Number(10), "new Number(10)"));
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});
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describe("String", () => {
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it("should stringify", test(new String("abc"), "new String('abc')"));
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});
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describe("Boolean", () => {
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it("should stringify", test(new Boolean(true), "new Boolean(true)"));
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});
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describeIf("Buffer", typeof Buffer === "function", () => {
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it("should stringify", test(Buffer.from("test"), "new Buffer('test')"));
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});
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describeIf("BigInt", typeof BigInt === "function", () => {
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it("should stringify", test(BigInt("10"), "BigInt('10')"));
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});
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describe("Error", () => {
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it("should stringify", test(new Error("test"), "new Error('test')"));
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});
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describe("unknown native type", () => {
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it("should be omitted", test({
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k: typeof process === "undefined"
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? window.navigator
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: process
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}, "{}"));
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});
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});
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describeIf("ES6", typeof Array.from === "function", () => {
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describeIf("Map", typeof Map === "function", () => {
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it("should stringify", test(new Map([["key", "value"]]), "new Map([['key','value']])"));
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});
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describeIf("Set", typeof Set === "function", () => {
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it("should stringify", test(new Set(["key", "value"]), "new Set(['key','value'])"));
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});
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describe("arrow functions", () => {
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describe("should stringify", cases([
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"(a, b) => a + b",
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"o => { return o.a + o.b; }",
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"(a, b) => { if (a) { return b; } }",
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"(a, b) => ({ [a]: b })",
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"a => b => () => a + b"
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]));
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it("should reindent function bodies", test(evalValue(" () => {\n" +
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" if (true) {\n" +
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' return "hello";\n' +
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" }\n" +
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" }"), '() => {\n if (true) {\n return "hello";\n }\n}', 2));
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describeIf("arrows with patterns", isSupported("({x}) => x"), () => {
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describe("should stringify", cases([
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"({ x, y }) => x + y",
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"({ x, y }) => { if (x === '}') { return y; } }",
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"({ x, y = /[/})]/.test(x) }) => { return y ? x : 0; }"
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]));
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});
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});
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describe("generators", () => {
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it("should stringify", testRoundTrip("function* (x) { yield x; }"));
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});
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describe("class notation", () => {
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it("should stringify classes", testRoundTrip("class {}"));
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it("should stringify class and method", testRoundTrip("class { method() {} }"));
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it("should stringify with newline", testRoundTrip("class\n{ method() {} }"));
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it("should stringify with comment", testRoundTrip("class/*test*/\n{ method() {} }"));
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});
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describe("method notation", () => {
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it("should stringify", testRoundTrip("{a(b, c) { return b + c; }}"));
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it("should stringify generator methods", testRoundTrip("{*a(b) { yield b; }}"));
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describe("should not be fooled by tricky names", cases([
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"{'function a'(b, c) { return b + c; }}",
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"{'a(a'(b, c) { return b + c; }}",
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"{'() => function '() {}}",
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"{'['() { return x[y]()\n{ return true; }}}",
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"{'() { return false;//'() { return true;\n}}"
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]));
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it("should not be fooled by tricky generator names", testRoundTrip("{*'function a'(b, c) { return b + c; }}"));
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it("should not be fooled by empty names", testRoundTrip("{''(b, c) { return b + c; }}"));
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it("should not be fooled by keys that look like functions", () => {
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const fn = evalValue('{ "() => ": () => () => 42 }')["() => "];
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expect(index_1.stringify(fn)).toEqual("() => () => 42");
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});
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describe("should not be fooled by arrow functions", cases([
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"{a:(b, c) => b + c}",
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"{a:a => a + 1}",
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"{'() => ':() => () => 42}",
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'{\'() => "\':() => "() {//"}',
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'{\'() => "\':() => "() {`//"}',
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'{\'() => "\':() => "() {`${//"}',
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'{\'() => "\':() => "() {/*//"}',
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semver_1.satisfies(process.versions.node, "<=4 || >=10")
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? "{'a => function ':a => function () { return a + 1; }}"
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: undefined
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]));
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describe("should not be fooled by regexp literals", cases([
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"{' '(s) { return /}/.test(s); }}",
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"{' '(s) { return /abc/ .test(s); }}",
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"{' '() { return x / y; // /}\n}}",
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"{' '() { return / y; }//* } */}}",
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"{' '() { return delete / y; }/.x}}",
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"{' '() { switch (x) { case / y; }}/: }}}",
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"{' '() { if (x) return; else / y;}/; }}",
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"{' '() { return x in / y;}/; }}",
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"{' '() { return x instanceof / y;}/; }}",
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"{' '() { return new / y;}/.x; }}",
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"{' '() { throw / y;}/.x; }}",
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"{' '() { return typeof / y;}/; }}",
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"{' '() { void / y;}/; }}",
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"{' '() { return x, / y;}/; }}",
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"{' '() { return x; / y;}/; }}",
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"{' '() { return { x: / y;}/ }; }}",
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"{' '() { return x + / y;}/.x; }}",
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"{' '() { return x - / y;}/.x; }}",
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"{' '() { return !/ y;}/; }}",
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"{' '() { return ~/ y;}/.x; }}",
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"{' '() { return x && / y;}/; }}",
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"{' '() { return x || / y;}/; }}",
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"{' '() { return x ^ / y;}/.x; }}",
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"{' '() { return x * / y;}/.x; }}",
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"{' '() { return x / / y;}/.x; }}",
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"{' '() { return x % / y;}/.x; }}",
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"{' '() { return x < / y;}/.x; }}",
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"{' '() { return x > / y;}/.x; }}",
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"{' '() { return x <= / y;}/.x; }}",
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"{' '() { return x /= / y;}/.x; }}",
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"{' '() { return x ? / y;}/ : false; }}"
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]));
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describe("should not be fooled by computed names", () => {
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it("1", test(evalValue('{ ["foobar".slice(3)](x) { return x + 1; } }'), "{bar(x) { return x + 1; }}"));
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it("2", test(evalValue('{[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\",\\"+s(b)+b)(JSON.stringify,",")]() {}")]() {}}'), '{\'[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\\\",\\\\"+s(b)+b)(JSON.stringify,",")]() {}")]() {}\'() {}}'));
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it("3", test(evalValue('{[`over${`6${"0".repeat(3)}`.replace("6", "9")}`]() { this.activateHair(); }}'), "{over9000() { this.activateHair(); }}"));
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it("4", test(evalValue("{[\"() {'\"]() {''}}"), "{'() {\\''() {''}}"));
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it("5", test(evalValue('{["() {`"]() {``}}'), "{'() {`'() {``}}"));
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it("6", test(evalValue('{["() {/*"]() {/*`${()=>{/*}*/}}'), "{'() {/*'() {/*`${()=>{/*}*/}}"));
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});
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// These two cases demonstrate that branching on
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// METHOD_NAMES_ARE_QUOTED is unavoidable--you can't write code
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// without it that will pass both of these cases on both node.js 4
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// and node.js 10. (If you think you can, consider that the name and
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// toString of the first case when executed on node.js 10 are
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// identical to the name and toString of the second case when
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// executed on node.js 4, so good luck telling them apart without
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// knowing which node you're on.)
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describe("should handle different versions of node correctly", () => {
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it("1", test(evalValue('{[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\",\\"+s(b)+b)(JSON.stringify,",")]() { return 0; /*")]() { return 0; /*() {/* */ return 1;}}'), '{\'[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\\\",\\\\"+s(b)+b)(JSON.stringify,",")]() { return 0; /*")]() { return 0; /*\'() { return 0; /*() {/* */ return 1;}}'));
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it("2", test(evalValue('{\'[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\\\",\\\\"+s(b)+b)(JSON.stringify,",")]() { return 0; /*")]() { return 0; /*\'() {/* */ return 1;}}'), '{\'[((s,a,b)=>a+s(a)+","+s(b)+b)(JSON.stringify,"[((s,a,b)=>a+s(a)+\\\\",\\\\"+s(b)+b)(JSON.stringify,",")]() { return 0; /*")]() { return 0; /*\'() {/* */ return 1;}}'));
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});
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it("should not be fooled by comments", test(evalValue("{'method' /* a comment! */ () /* another comment! */ {}}"), "{method() /* another comment! */ {}}"));
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it("should stringify extracted methods", () => {
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const fn = evalValue("{ foo(x) { return x + 1; } }").foo;
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expect(index_1.stringify(fn)).toEqual("function foo(x) { return x + 1; }");
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});
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it("should stringify extracted generators", () => {
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const fn = evalValue("{ *foo(x) { yield x; } }").foo;
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expect(index_1.stringify(fn)).toEqual("function* foo(x) { yield x; }");
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});
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it("should stringify extracted methods with tricky names", () => {
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const fn = evalValue('{ "a(a"(x) { return x + 1; } }')["a(a"];
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expect(index_1.stringify(fn)).toEqual("function (x) { return x + 1; }");
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});
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it("should stringify extracted methods with arrow-like tricky names", () => {
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const fn = evalValue('{ "() => function "(x) { return x + 1; } }')["() => function "];
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expect(index_1.stringify(fn)).toEqual("function (x) { return x + 1; }");
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});
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it("should stringify extracted methods with empty names", () => {
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const fn = evalValue('{ ""(x) { return x + 1; } }')[""];
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expect(index_1.stringify(fn)).toEqual("function (x) { return x + 1; }");
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});
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it("should handle transplanted names", () => {
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const fn = evalValue("{ foo(x) { return x + 1; } }").foo;
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expect(index_1.stringify({ bar: fn })).toEqual("{bar:function foo(x) { return x + 1; }}");
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});
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it("should handle transplanted names with generators", () => {
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const fn = evalValue("{ *foo(x) { yield x; } }").foo;
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expect(index_1.stringify({ bar: fn })).toEqual("{bar:function* foo(x) { yield x; }}");
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});
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it("should reindent methods", test(evalValue(" {\n" +
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" fn() {\n" +
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" if (true) {\n" +
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' return "hello";\n' +
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" }\n" +
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" }\n" +
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" }"), '{\n fn() {\n if (true) {\n return "hello";\n }\n }\n}', 2));
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});
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});
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describe("ES2017", () => {
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describeIf("async functions", isSupported("(async function () {})"), () => {
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it("should stringify", testRoundTrip("async function (x) { await x; }"));
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it("should gracefully handle unexpected Function.toString formats", () => {
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const origToString = Function.prototype.toString;
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Function.prototype.toString = () => "{nope}";
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try {
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expect(index_1.stringify(evalValue("async function () {}"))).toEqual("void '{nope}'");
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}
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finally {
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Function.prototype.toString = origToString;
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}
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});
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});
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describeIf("async arrows", isSupported("async () => {}"), () => {
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describe("should stringify", cases([
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"async (x) => x + 1",
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"async x => x + 1",
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"async x => { await x.then(y => y + 1); }"
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]));
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describe("should stringify as object properties", cases([
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"{f:async a => a + 1}",
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semver_1.satisfies(process.versions.node, "<=4 || >=10")
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? "{'async a => function ':async a => function () { return a + 1; }}"
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: undefined
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]));
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});
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});
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describe("ES2018", () => {
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describeIf("async generators", isSupported("(async function* () {})"), () => {
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it("should stringify", testRoundTrip("async function* (x) { yield x; }"));
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it("should gracefully handle unexpected Function.toString formats", () => {
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const origToString = Function.prototype.toString;
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Function.prototype.toString = () => "{nope}";
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try {
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expect(index_1.stringify(evalValue("async function* () {}"))).toEqual("void '{nope}'");
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}
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finally {
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Function.prototype.toString = origToString;
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}
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});
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});
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});
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describe("global", () => {
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it("should access the global in the current environment", testRoundTrip("Function('return this')()"));
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});
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});
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describe("circular references", () => {
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it("should omit circular references", () => {
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const obj = { key: "value" };
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obj.obj = obj;
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const result = index_1.stringify(obj);
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expect(result).toEqual("{key:'value'}");
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});
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it("should restore value", () => {
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const obj = { key: "value" };
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obj.obj = obj;
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const result = index_1.stringify(obj, null, null, { references: true });
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expect(result).toEqual("(function(){var x={key:'value'};x.obj=x;return x;}())");
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});
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it("should omit recursive array value", () => {
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const obj = [1, 2, 3];
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obj.push(obj);
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const result = index_1.stringify(obj);
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expect(result).toEqual("[1,2,3,undefined]");
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});
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it("should restore array value", () => {
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const obj = [1, 2, 3];
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obj.push(obj);
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const result = index_1.stringify(obj, null, null, { references: true });
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expect(result).toEqual("(function(){var x=[1,2,3,undefined];x[3]=x;return x;}())");
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});
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it("should print repeated values when no references enabled", () => {
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const obj = {};
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const child = {};
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obj.a = child;
|
|
obj.b = child;
|
|
const result = index_1.stringify(obj);
|
|
expect(result).toEqual("{a:{},b:{}}");
|
|
});
|
|
it("should restore repeated values", () => {
|
|
const obj = {};
|
|
const child = {};
|
|
obj.a = child;
|
|
obj.b = child;
|
|
const result = index_1.stringify(obj, null, null, { references: true });
|
|
expect(result).toEqual("(function(){var x={a:{}};x.b=x.a;return x;}())");
|
|
});
|
|
it("should restore repeated values with indentation", function () {
|
|
const obj = {};
|
|
const child = {};
|
|
obj.a = child;
|
|
obj.b = child;
|
|
const result = index_1.stringify(obj, null, 2, { references: true });
|
|
expect(result).toEqual("(function () {\nvar x = {\n a: {}\n};\nx.b = x.a;\nreturn x;\n}())");
|
|
});
|
|
});
|
|
describe("custom indent", () => {
|
|
it("string", () => {
|
|
const result = index_1.stringify({
|
|
test: [1, 2, 3],
|
|
nested: {
|
|
key: "value"
|
|
}
|
|
}, null, "\t");
|
|
expect(result).toEqual("{\n" +
|
|
"\ttest: [\n\t\t1,\n\t\t2,\n\t\t3\n\t],\n" +
|
|
"\tnested: {\n\t\tkey: 'value'\n\t}\n" +
|
|
"}");
|
|
});
|
|
it("integer", () => {
|
|
const result = index_1.stringify({
|
|
test: [1, 2, 3],
|
|
nested: {
|
|
key: "value"
|
|
}
|
|
}, null, 2);
|
|
expect(result).toEqual("{\n" +
|
|
" test: [\n 1,\n 2,\n 3\n ],\n" +
|
|
" nested: {\n key: 'value'\n }\n" +
|
|
"}");
|
|
});
|
|
it("float", () => {
|
|
const result = index_1.stringify({
|
|
test: [1, 2, 3],
|
|
nested: {
|
|
key: "value"
|
|
}
|
|
}, null, 2.6);
|
|
expect(result).toEqual("{\n" +
|
|
" test: [\n 1,\n 2,\n 3\n ],\n" +
|
|
" nested: {\n key: 'value'\n }\n" +
|
|
"}");
|
|
});
|
|
});
|
|
describe("replacer function", () => {
|
|
it("should allow custom replacements", () => {
|
|
let callCount = 0;
|
|
const result = index_1.stringify({
|
|
test: "value"
|
|
}, function (value, indent, next) {
|
|
callCount++;
|
|
if (typeof value === "string") {
|
|
return '"hello"';
|
|
}
|
|
return next(value);
|
|
});
|
|
expect(callCount).toEqual(2);
|
|
expect(result).toEqual('{test:"hello"}');
|
|
});
|
|
it("change primitive to object", () => {
|
|
const result = index_1.stringify({
|
|
test: 10
|
|
}, function (value, indent, next) {
|
|
if (typeof value === "number") {
|
|
return next({ obj: "value" });
|
|
}
|
|
return next(value);
|
|
});
|
|
expect(result).toEqual("{test:{obj:'value'}}");
|
|
});
|
|
it("change object to primitive", () => {
|
|
const result = index_1.stringify({
|
|
test: 10
|
|
}, value => Object.prototype.toString.call(value));
|
|
expect(result).toEqual("[object Object]");
|
|
});
|
|
it("should support object functions", () => {
|
|
function makeRaw(str) {
|
|
const fn = () => {
|
|
/* Noop. */
|
|
};
|
|
fn.__expression = str;
|
|
return fn;
|
|
}
|
|
const result = index_1.stringify({
|
|
"no-console": makeRaw(`process.env.NODE_ENV === 'production' ? 'error' : 'off'`),
|
|
"no-debugger": makeRaw(`process.env.NODE_ENV === 'production' ? 'error' : 'off'`)
|
|
}, (val, indent, stringify) => {
|
|
if (val && val.__expression) {
|
|
return val.__expression;
|
|
}
|
|
return stringify(val);
|
|
}, 2);
|
|
expect(result).toEqual(`{
|
|
'no-console': process.env.NODE_ENV === 'production' ? 'error' : 'off',
|
|
'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'off'
|
|
}`);
|
|
});
|
|
});
|
|
describe("max depth", () => {
|
|
const obj = { a: { b: { c: 1 } } };
|
|
it("should get all object", test(obj, "{a:{b:{c:1}}}"));
|
|
it("should get part of the object", test(obj, "{a:{b:{}}}", null, { maxDepth: 2 }));
|
|
it("should get part of the object when tracking references", test(obj, "{a:{b:{}}}", null, { maxDepth: 2, references: true }));
|
|
});
|
|
describe("property based", () => {
|
|
it("should produce string evaluating to the original value", () => {
|
|
fc.assert(fc.property(fc.anything(), value => {
|
|
expect(evalValue(index_1.stringify(value))).toEqual(value);
|
|
}));
|
|
});
|
|
});
|
|
});
|
|
//# sourceMappingURL=index.spec.js.map
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