webpack/test/JavascriptParser.unittest.js

"use strict";

/* eslint-disable no-unused-expressions, no-unassigned-vars, func-names */

// cspell:ignore fghsub notry fghsub notry notry this's ijksub this's ijksub fghsub fghsub notry ijksub ijksub strrring strrring strr strrring strrring strr Sstrrringy strone stronetwo stronetwothree stronetwo stronetwothree stronetwothreefour onetwo onetwo twothree twothree twothree threefour onetwo onetwo threefour threefour fourfive startstrmid igmy igmyi igmya
const BasicEvaluatedExpression = require("../lib/javascript/BasicEvaluatedExpression");
const JavascriptParser = require("../lib/javascript/JavascriptParser");

describe("JavascriptParser", () => {
	/* eslint-disable no-undef */
	/* eslint-disable no-unused-vars */
	const testCases = {
		"call ident": [
			function () {
				abc("test");
			},
			{
				abc: ["test"]
			}
		],
		"call member": [
			function () {
				cde.abc("membertest");
			},
			{
				cdeabc: ["membertest"]
			}
		],
		"call member using bracket notation": [
			function () {
				// eslint-disable-next-line dot-notation
				cde["abc"]("membertest");
			},
			{
				cdeabc: ["membertest"]
			}
		],
		"call inner member": [
			function () {
				cde.ddd.abc("inner");
			},
			{
				cdedddabc: ["inner"]
			}
		],
		"call inner member using bracket notation": [
			function () {
				// eslint-disable-next-line dot-notation
				cde.ddd["abc"]("inner");
			},
			{
				cdedddabc: ["inner"]
			}
		],
		expression: [
			function () {
				fgh;
			},
			{
				fgh: [""]
			}
		],
		"expression sub": [
			function () {
				fgh.sub;
			},
			{
				fghsub: ["notry"]
			}
		],
		"member expression": [
			function () {
				test[memberExpr];

				// eslint-disable-next-line no-implicit-coercion
				test[+memberExpr];
			},
			{
				expressions: ["memberExpr", "memberExpr"]
			}
		],
		"in function definition": [
			function () {
				(function (abc, cde, fgh) {
					abc("test");
					cde.abc("test");
					cde.ddd.abc("test");
					fgh;
					fgh.sub;
				})();
			},
			{}
		],
		"const definition": [
			function () {
				// eslint-disable-next-line one-var
				let abc, cde, fgh;
				abc("test");
				cde.abc("test");
				cde.ddd.abc("test");
				fgh;
				fgh.sub;
			},
			{}
		],
		"var definition": [
			function () {
				// eslint-disable-next-line one-var
				let abc, cde, fgh;
				abc("test");
				cde.abc("test");
				cde.ddd.abc("test");
				fgh;
				fgh.sub;
			},
			{}
		],
		"function definition": [
			function () {
				function abc() {}

				function cde() {}

				function fgh() {}
				abc("test");
				cde.abc("test");
				cde.ddd.abc("test");
				fgh;
				fgh.sub;
			},
			{}
		],
		"class definition": [
			function () {
				class memberExpr {
					cde() {
						abc("cde");
					}

					static fgh() {
						abc("fgh");
						fgh();
					}
				}
			},
			{
				abc: ["cde", "fgh"],
				fgh: ["memberExpr"]
			}
		],
		"in try": [
			function () {
				try {
					fgh.sub;
					fgh;

					function test(ttt) {
						fgh.sub;
						fgh;
					}
				} catch (err) {
					fgh.sub;
					fgh;
				}
			},
			{
				fghsub: ["try", "notry", "notry"],
				fgh: ["test", "test ttt", "test err"]
			}
		],
		"renaming with const": [
			function () {
				const xyz = abc;
				xyz("test");
			},
			{
				abc: ["test"]
			}
		],
		"renaming with var": [
			function () {
				const xyz = abc;
				xyz("test");
			},
			{
				abc: ["test"]
			}
		],
		"renaming with assignment": [
			function () {
				const xyz = abc;
				xyz("test");
			},
			{
				abc: ["test"]
			}
		],
		"renaming with IIFE": [
			function () {
				!(function (xyz) {
					xyz("test");
				})(abc);
			},
			{
				abc: ["test"]
			}
		],
		"renaming arguments with IIFE (called)": [
			function () {
				!function (xyz) {
					xyz("test");
				}.call(fgh, abc);
			},
			{
				abc: ["test"],
				fgh: [""]
			}
		],
		"renaming this's properties with IIFE (called)": [
			function () {
				!function () {
					this.sub;
				}.call(ijk);
			},
			{
				ijksub: ["test"]
			}
		],
		"renaming this's properties with nested IIFE (called)": [
			function () {
				!function () {
					!function () {
						this.sub;
					}.call(this);
				}.call(ijk);
			},
			{
				ijksub: ["test"]
			}
		],
		"new Foo(...)": [
			function () {
				// eslint-disable-next-line new-cap, no-new
				new xyz("membertest");
			},
			{
				xyz: ["membertest"]
			}
		],
		"spread calls/literals": [
			function () {
				const xyz = [...abc("xyz"), cde];
				Math.max(...fgh);
			},
			{
				abc: ["xyz"],
				fgh: ["xyz"]
			}
		]
	};
	/* eslint-enable no-undef */
	/* eslint-enable no-unused-vars */

	for (const name of Object.keys(testCases)) {
		it(`should parse ${name}`, () => {
			let source = testCases[name][0].toString();
			source = source.slice(13, -1).trim();
			const state = testCases[name][1];

			const testParser = new JavascriptParser({});
			testParser.hooks.canRename
				.for("abc")
				.tap("JavascriptParserTest", (_expr) => true);
			testParser.hooks.canRename
				.for("ijk")
				.tap("JavascriptParserTest", (_expr) => true);
			testParser.hooks.call.for("abc").tap("JavascriptParserTest", (expr) => {
				if (!testParser.state.abc) testParser.state.abc = [];
				testParser.state.abc.push(testParser.parseString(expr.arguments[0]));
				return true;
			});
			testParser.hooks.call
				.for("cde.abc")
				.tap("JavascriptParserTest", (expr) => {
					if (!testParser.state.cdeabc) testParser.state.cdeabc = [];
					testParser.state.cdeabc.push(
						testParser.parseString(expr.arguments[0])
					);
					return true;
				});
			testParser.hooks.call
				.for("cde.ddd.abc")
				.tap("JavascriptParserTest", (expr) => {
					if (!testParser.state.cdedddabc) testParser.state.cdedddabc = [];
					testParser.state.cdedddabc.push(
						testParser.parseString(expr.arguments[0])
					);
					return true;
				});
			testParser.hooks.expression
				.for("fgh")
				.tap("JavascriptParserTest", (_expr) => {
					if (!testParser.state.fgh) testParser.state.fgh = [];
					testParser.state.fgh.push(
						[...testParser.scope.definitions.asSet()].join(" ")
					);
					return true;
				});
			testParser.hooks.expression
				.for("fgh.sub")
				.tap("JavascriptParserTest", (_expr) => {
					if (!testParser.state.fghsub) testParser.state.fghsub = [];
					testParser.state.fghsub.push(
						testParser.scope.inTry ? "try" : "notry"
					);
					return true;
				});
			testParser.hooks.expression
				.for("ijk.sub")
				.tap("JavascriptParserTest", (_expr) => {
					if (!testParser.state.ijksub) testParser.state.ijksub = [];
					testParser.state.ijksub.push("test");
					return true;
				});
			testParser.hooks.expression
				.for("memberExpr")
				.tap("JavascriptParserTest", (expr) => {
					if (!testParser.state.expressions) testParser.state.expressions = [];
					testParser.state.expressions.push(expr.name);
					return true;
				});
			testParser.hooks.new.for("xyz").tap("JavascriptParserTest", (expr) => {
				if (!testParser.state.xyz) testParser.state.xyz = [];
				testParser.state.xyz.push(testParser.parseString(expr.arguments[0]));
				return true;
			});
			const actual = testParser.parse(source, {});
			expect(typeof actual).toBe("object");
			expect(actual).toEqual(state);
		});
	}

	it("should parse comments", () => {
		const source = "//comment1\n/*comment2*/";
		const state = [
			{
				type: "Line",
				value: "comment1"
			},
			{
				type: "Block",
				value: "comment2"
			}
		];

		const testParser = new JavascriptParser({});

		testParser.hooks.program.tap("JavascriptParserTest", (ast, comments) => {
			if (!testParser.state.comments) testParser.state.comments = comments;
			return true;
		});

		const actual = testParser.parse(source, {});
		expect(typeof actual).toBe("object");
		expect(typeof actual.comments).toBe("object");
		for (const [index, element] of actual.comments.entries()) {
			expect(typeof element.type).toBe("string");
			expect(typeof element.value).toBe("string");
			expect(element.type).toBe(state[index].type);
			expect(element.value).toBe(state[index].value);
		}
	});

	describe("expression evaluation", () => {
		/**
		 * @param {string} source source
		 * @returns {import("../lib/javascript/JavascriptParser").ParserState} the parser state
		 */
		function evaluateInParser(source) {
			const parser = new JavascriptParser();
			parser.hooks.call.for("test").tap("JavascriptParserTest", (expr) => {
				parser.state.result = parser.evaluateExpression(expr.arguments[0]);
			});
			parser.hooks.evaluateIdentifier
				.for("aString")
				.tap("JavascriptParserTest", (expr) =>
					new BasicEvaluatedExpression()
						.setString("aString")
						.setRange(expr.range)
				);
			parser.hooks.evaluateIdentifier
				.for("b.Number")
				.tap("JavascriptParserTest", (expr) =>
					new BasicEvaluatedExpression().setNumber(123).setRange(expr.range)
				);
			return parser.parse(`test(${source});`, {}).result;
		}

		const testCases = {
			true: "bool=true",
			false: "bool=false",
			"!true": "bool=false",
			"!false": "bool=true",
			'"strrring"': "string=strrring",
			'"strr" + "ring"': "string=strrring",
			'"s" + ("trr" + "rin") + "g"': "string=strrring",
			"'S' + (\"strr\" + \"ring\") + 'y'": "string=Sstrrringy",
			"/abc/": "regExp=/abc/",
			1: "number=1",
			"1 + 3": "number=4",
			"3 - 1": "number=2",
			"2 * 3": "number=6",
			"8 / 2": "number=4",
			"2 ** 3": "number=8",
			"12 & 5": "number=4",
			"12 | 5": "number=13",
			"12 ^ 5": "number=9",
			"9 >>> 2": "number=2",
			"9 >> 2": "number=2",
			"9 << 2": "number=36",
			"~3": "number=-4",
			"1 == 1": "bool=true",
			"1 === 1": "bool=true",
			"3 != 1": "bool=true",
			"3 !== 1": "bool=true",
			"3 == 1": "bool=false",
			"3 === 1": "bool=false",
			"1 != 1": "bool=false",
			"1 !== 1": "bool=false",
			100.25: "number=100.25",
			"!100.25": "bool=false",
			"!+100.25": "bool=false",
			"!-100.25": "bool=false",
			0: "number=0",
			"!0": "bool=true",
			"!-0": "bool=true",
			"!+0": "bool=true",
			"20n": "bigint=20",
			"10n + 10n": "bigint=20",
			"10n - 5n": "bigint=5",
			"10n * 5n": "bigint=50",
			"10n / 5n": "bigint=2",
			"5n ** 2n": "bigint=25",
			"5n == 5n": "bool=true",
			"5n === 5n": "bool=true",
			"5n != 5n": "bool=false",
			"5n !== 5n": "bool=false",
			"5n != 1n": "bool=true",
			"5n !== 1n": "bool=true",
			"5n & 3n": "bigint=1",
			"5n | 2n": "bigint=7",
			"5n ^ 2n": "bigint=7",
			"5n >> 2n": "bigint=1",
			"5n << 2n": "bigint=20",
			"null == null": "bool=true",
			"null === null": "bool=true",
			"null != null": "bool=false",
			"null !== null": "bool=false",
			"true === false": "bool=false",
			"false !== false": "bool=false",
			"true == true": "bool=true",
			"false != true": "bool=true",
			"!'a'": "bool=false",
			"!''": "bool=true",
			"!null": "bool=true",
			"'pre' + a": "wrapped=['pre' string=pre]+[null]",
			"a + 'post'": "wrapped=[null]+['post' string=post]",
			"'pre' + a + 'post'": "wrapped=['pre' string=pre]+['post' string=post]",
			"1 + a + 2": "",
			"1 + a + 'post'": "wrapped=[null]+['post' string=post]",
			"'' + 1 + a + 2": "wrapped=['' + 1 string=1]+[2 string=2]",
			"'' + 1 + a + 2 + 3": "wrapped=['' + 1 string=1]+[2 + 3 string=23]",
			"'' + 1 + a + (2 + 3)": "wrapped=['' + 1 string=1]+[2 + 3 string=5]",
			"'pre' + (1 + a) + (2 + 3)":
				"wrapped=['pre' string=pre]+[2 + 3 string=5]",
			"a ? 'o1' : 'o2'": "options=['o1' string=o1],['o2' string=o2]",
			"a ? 'o1' : b ? 'o2' : 'o3'":
				"options=['o1' string=o1],['o2' string=o2],['o3' string=o3]",
			"a ? (b ? 'o1' : 'o2') : 'o3'":
				"options=['o1' string=o1],['o2' string=o2],['o3' string=o3]",
			"a ? (b ? 'o1' : 'o2') : c ? 'o3' : 'o4'":
				"options=['o1' string=o1],['o2' string=o2],['o3' string=o3],['o4' string=o4]",
			"a ? 'o1' : b ? 'o2' : c ? 'o3' : 'o4'":
				"options=['o1' string=o1],['o2' string=o2],['o3' string=o3],['o4' string=o4]",
			"a ? 'o1' : b ? b : c ? 'o3' : c":
				"options=['o1' string=o1],[b],['o3' string=o3],[c]",
			"['i1', 'i2', 3, a, b ? 4 : 5]":
				"items=['i1' string=i1],['i2' string=i2],[3 number=3],[a],[b ? 4 : 5 options=[4 number=4],[5 number=5]]",
			"typeof 'str'": "string=string",
			"typeof aString": "string=string",
			"typeof b.Number": "string=number",
			"typeof b['Number']": "string=number",
			"typeof b[Number]": "",
			"typeof true": "string=boolean",
			"typeof null": "string=object",
			"typeof 1": "string=number",
			"typeof 1n": "string=bigint",
			"b.Number": "number=123",
			"b['Number']": "number=123",
			"b[Number]": "",
			"'str'.concat()": "string=str",
			"'str'.concat('one')": "string=strone",
			"'str'.concat('one').concat('two')": "string=stronetwo",
			"'str'.concat('one').concat('two', 'three')": "string=stronetwothree",
			"'str'.concat('one', 'two')": "string=stronetwo",
			"'str'.concat('one', 'two').concat('three')": "string=stronetwothree",
			"'str'.concat('one', 'two').concat('three', 'four')":
				"string=stronetwothreefour",
			"'str'.concat('one', obj)": "wrapped=['str' string=str]+[null]",
			"'str'.concat('one', obj).concat()": "wrapped=['str' string=str]+[null]",
			"'str'.concat('one', obj, 'two')":
				"wrapped=['str' string=str]+['two' string=two]",
			"'str'.concat('one', obj, 'two').concat()":
				"wrapped=['str' string=str]+['two' string=two]",
			"'str'.concat('one', obj, 'two').concat('three')":
				"wrapped=['str' string=str]+['three' string=three]",
			"'str'.concat(obj)": "wrapped=['str' string=str]+[null]",
			"'str'.concat(obj).concat()": "wrapped=['str' string=str]+[null]",
			"'str'.concat(obj).concat('one', 'two')":
				"wrapped=['str' string=str]+['one', 'two' string=onetwo]",
			"'str'.concat(obj).concat(obj, 'one')":
				"wrapped=['str' string=str]+['one' string=one]",
			"'str'.concat(obj).concat(obj, 'one', 'two')":
				"wrapped=['str' string=str]+['one', 'two' string=onetwo]",
			"'str'.concat(obj).concat('one', obj, 'one')":
				"wrapped=['str' string=str]+['one' string=one]",
			"'str'.concat(obj).concat('one', obj, 'two', 'three')":
				"wrapped=['str' string=str]+['two', 'three' string=twothree]",
			"'str'.concat(obj, 'one')":
				"wrapped=['str' string=str]+['one' string=one]",
			"'str'.concat(obj, 'one').concat()":
				"wrapped=['str' string=str]+['one' string=one]",
			"'str'.concat(obj, 'one').concat('two', 'three')":
				"wrapped=['str' string=str]+['two', 'three' string=twothree]",
			"'str'.concat(obj, 'one').concat(obj, 'two', 'three')":
				"wrapped=['str' string=str]+['two', 'three' string=twothree]",
			"'str'.concat(obj, 'one').concat('two', obj, 'three')":
				"wrapped=['str' string=str]+['three' string=three]",
			"'str'.concat(obj, 'one').concat('two', obj, 'three', 'four')":
				"wrapped=['str' string=str]+['three', 'four' string=threefour]",
			"'str'.concat(obj, 'one', 'two')":
				"wrapped=['str' string=str]+['one', 'two' string=onetwo]",
			"'str'.concat(obj, 'one', 'two').concat()":
				"wrapped=['str' string=str]+['one', 'two' string=onetwo]",
			"'str'.concat(obj, 'one', 'two').concat('three', 'four')":
				"wrapped=['str' string=str]+['three', 'four' string=threefour]",
			"'str'.concat(obj, 'one', 'two').concat(obj, 'three', 'four')":
				"wrapped=['str' string=str]+['three', 'four' string=threefour]",
			"'str'.concat(obj, 'one', 'two').concat('three', obj, 'four')":
				"wrapped=['str' string=str]+['four' string=four]",
			"'str'.concat(obj, 'one', 'two').concat('three', obj, 'four', 'five')":
				"wrapped=['str' string=str]+['four', 'five' string=fourfive]",
			// eslint-disable-next-line no-template-curly-in-string
			"`start${obj}mid${obj2}end`":
				"template=[start string=start],[mid string=mid],[end string=end]",
			// eslint-disable-next-line no-template-curly-in-string
			"`start${'str'}mid${obj2}end`":
				// eslint-disable-next-line no-template-curly-in-string
				"template=[start${'str'}mid string=startstrmid],[end string=end]",
			// eslint-disable-next-line no-template-curly-in-string
			"`a${x}` === `b${x}`": "bool=false",
			// eslint-disable-next-line no-template-curly-in-string
			"`${x}a` === `${x}b`": "bool=false",
			// eslint-disable-next-line no-template-curly-in-string
			"`${a}${b}` === `a${b}`": "",
			// eslint-disable-next-line no-template-curly-in-string
			"`${a}${b}` === `${a}b`": "",
			"'abc'.slice(1)": "string=bc",
			"'abcdef'.slice(2, 5)": "string=cde",
			"'abcdef'.substring(2, 3)": "string=c",
			"'abcdef'.substring(2, 3, 4)": "",
			"'abc'[\"slice\"](1)": "string=bc",
			"'abc'[slice](1)": "",
			"'1,2+3'.split(/[,+]/)": "array=[1],[2],[3]",
			"'1,2+3'.split(expr)": "",
			"'a' + (expr + 'c')": "wrapped=['a' string=a]+['c' string=c]",
			"1 + 'a'": "string=1a",
			"'a' + 1": "string=a1",
			"'a' + expr + 1": "wrapped=['a' string=a]+[1 string=1]"
		};

		for (const key of Object.keys(testCases)) {
			/**
			 * @param {import("../lib/javascript/BasicEvaluatedExpression")} evalExpr eval expr
			 * @returns {string} result
			 */
			function evalExprToString(evalExpr) {
				if (!evalExpr) {
					return "null";
				}
				const result = [];
				if (evalExpr.isString()) result.push(`string=${evalExpr.string}`);
				if (evalExpr.isNumber()) result.push(`number=${evalExpr.number}`);
				if (evalExpr.isBigInt()) result.push(`bigint=${evalExpr.bigint}`);
				if (evalExpr.isBoolean()) result.push(`bool=${evalExpr.bool}`);
				if (evalExpr.isRegExp()) result.push(`regExp=${evalExpr.regExp}`);
				if (evalExpr.isConditional()) {
					result.push(
						`options=[${evalExpr.options.map(evalExprToString).join("],[")}]`
					);
				}
				if (evalExpr.isArray()) {
					result.push(
						`items=[${evalExpr.items.map(evalExprToString).join("],[")}]`
					);
				}
				if (evalExpr.isConstArray()) {
					result.push(`array=[${evalExpr.array.join("],[")}]`);
				}
				if (evalExpr.isTemplateString()) {
					result.push(
						`template=[${evalExpr.quasis.map(evalExprToString).join("],[")}]`
					);
				}
				if (evalExpr.isWrapped()) {
					result.push(
						`wrapped=[${evalExprToString(evalExpr.prefix)}]+[${evalExprToString(
							evalExpr.postfix
						)}]`
					);
				}
				if (evalExpr.range) {
					const start = evalExpr.range[0] - 5;
					const end = evalExpr.range[1] - 5;
					return (
						key.slice(start, end) +
						(result.length > 0 ? ` ${result.join(" ")}` : "")
					);
				}
				return result.join(" ");
			}

			it(`should eval ${key}`, () => {
				const evalExpr = evaluateInParser(key);
				expect(evalExprToString(evalExpr)).toBe(
					testCases[key] ? `${key} ${testCases[key]}` : key
				);
			});
		}
	});

	describe("async/await support", () => {
		describe("should accept", () => {
			const cases = {
				"async function": "async function x() {}",
				"async arrow function": "async () => {}",
				"await expression": "async function x(y) { await y }",
				"await iteration": "async function f() { for await (x of xs); }"
			};
			const parser = new JavascriptParser();
			for (const name of Object.keys(cases)) {
				const expr = cases[name];

				it(name, () => {
					const actual = parser.parse(expr, {});
					expect(typeof actual).toBe("object");
				});
			}
		});

		describe("should parse await", () => {
			const cases = {
				require: [
					"async function x() { await require('y'); }",
					{
						param: "y"
					}
				],
				import: [
					"async function x() { const y = await import('z'); }",
					{
						param: "z"
					}
				]
			};

			const parser = new JavascriptParser();
			parser.hooks.call.for("require").tap("JavascriptParserTest", (expr) => {
				const param = parser.evaluateExpression(expr.arguments[0]);
				parser.state.param = param.string;
			});
			parser.hooks.importCall.tap("JavascriptParserTest", (expr) => {
				const param = parser.evaluateExpression(expr.source);
				parser.state.param = param.string;
			});

			for (const name of Object.keys(cases)) {
				it(name, () => {
					const actual = parser.parse(cases[name][0], {});
					expect(actual).toEqual(cases[name][1]);
				});
			}
		});
	});

	describe("object rest/spread support", () => {
		describe("should accept", () => {
			const cases = {
				"object spread": "({...obj})",
				"object rest": "({...obj} = foo)"
			};
			for (const name of Object.keys(cases)) {
				const expr = cases[name];

				it(name, () => {
					const actual = JavascriptParser._parse(expr, {});
					expect(typeof actual).toBe("object");
				});
			}
		});

		it("should collect definitions from identifiers introduced in object patterns", () => {
			let definitions;

			const parser = new JavascriptParser();

			parser.hooks.statement.tap("JavascriptParserTest", (_expr) => {
				definitions = parser.scope.definitions;
				return true;
			});

			parser.parse("const { a, ...rest } = { a: 1, b: 2 };", {});

			expect(definitions.has("a")).toBe(true);
			expect(definitions.has("rest")).toBe(true);
		});
	});

	describe("parse calculated string", () => {
		describe("should work", () => {
			const cases = {
				123: {
					code: "123",
					result: {
						code: false,
						conditional: false,
						range: [0, 3],
						value: "123"
					}
				},
				"'test'": {
					code: "'test'",
					result: {
						code: false,
						conditional: false,
						range: [0, 6],
						value: "test"
					}
				},
				"'test' + 'test'": {
					code: "'test' + 'test'",
					result: {
						code: false,
						conditional: false,
						range: [0, 15],
						value: "testtest"
					}
				},
				"myVar + 'test'": {
					code: "myVar + 'test'",
					result: {
						code: true,
						conditional: false,
						range: undefined,
						value: ""
					}
				},
				"'test' + myVar": {
					code: "'test' + myVar",
					result: {
						code: true,
						conditional: false,
						range: [0, 6],
						value: "test"
					}
				},
				"true ? 'one' : 'two'": {
					code: "true ? 'one' : 'two'",
					result: {
						code: true,
						conditional: [
							{
								code: false,
								conditional: false,
								range: [7, 12],
								value: "one"
							},
							{
								code: false,
								conditional: false,
								range: [15, 20],
								value: "two"
							}
						],
						range: undefined,
						value: ""
					}
				},
				"true ? true ? 'one' : 'two' : true ? 'three': 'four'": {
					code: "true ? true ? 'one' : 'two' : true ? 'three': 'four'",
					result: {
						code: true,
						conditional: [
							{
								code: false,
								conditional: false,
								range: [14, 19],
								value: "one"
							},
							{
								code: false,
								conditional: false,
								range: [22, 27],
								value: "two"
							},
							{
								code: false,
								conditional: false,
								range: [37, 44],
								value: "three"
							},
							{
								code: false,
								conditional: false,
								range: [46, 52],
								value: "four"
							}
						],
						range: undefined,
						value: ""
					}
				}
			};
			for (const name of Object.keys(cases)) {
				const expr = cases[name];

				it(name, () => {
					const parser = new JavascriptParser();
					const actual = JavascriptParser._parse(expr.code);
					expect(typeof actual).toBe("object");
					expect(
						parser.parseCalculatedString(actual.body[0].expression)
					).toEqual(expr.result);
				});
			}
		});
	});

	describe("BasicEvaluatedExpression", () => {
		/** @type [string, boolean][] */
		const tests = [
			...["i", "g", "m", "y"].reduce((acc, flag) => {
				acc.push([flag, true]);
				acc.push([flag + flag, false]);
				return acc;
			}, []),
			["", true],
			["igm", true],
			["igmy", true],
			["igmyi", false],
			["igmya", false],
			["ai", false],
			["ia", false]
		];

		for (const [suite, expected] of tests) {
			it(`BasicEvaluatedExpression.isValidRegExpFlags(${JSON.stringify(
				suite
			)})`, () => {
				expect(BasicEvaluatedExpression.isValidRegExpFlags(suite)).toBe(
					expected
				);
			});
		}
	});
});