true}.name].hi} />"
)
).toBe(
`export var hi = jsx("div", {
hi: foo[{ name: () => true }.name].hi
}, undefined, false, undefined, this);
`
);
expect(
bun.transformSync("export var hi =
")
).toBe(
`export var hi = jsx(Foo, {
NODE_ENV: "development"
}, undefined, false, undefined, this);
`
);
expect(
bun.transformSync("export var hi =
")
).toBe(
`export var hi = jsx("div", {
baz: foo["baz"].bar?.baz
}, undefined, false, undefined, this);
`
);
try {
bun.transformSync("export var hi =
");
throw new Error("Expected error");
} catch (e) {
expect(e.errors[0].message.includes('Expected ">"')).toBe(true);
}
expect(
bun.transformSync("export var hi =
")
).toBe(
`export var hi = jsx("div", {
Foo,
children: jsx(Foo, {}, undefined, false, undefined, this)
}, undefined, false, undefined, this);
`
);
expect(
bun.transformSync("export var hi =
")
).toBe(
`export var hi = jsx("div", {
Foo,
children: jsx(Foo, {}, undefined, false, undefined, this)
}, undefined, false, undefined, this);
`
);
expect(bun.transformSync("export var hi =
{123}}
").trim()).toBe(
`export var hi = jsx("div", {
children: [
123,
"}"
]
}, undefined, true, undefined, this);
`.trim()
);
});
it("require with a dynamic non-string expression", () => {
var nodeTranspiler = new Bun.Transpiler({ platform: "node" });
expect(nodeTranspiler.transformSync("require('hi' + bar)")).toBe(
'require("hi" + bar);\n'
);
});
it("CommonJS", () => {
var nodeTranspiler = new Bun.Transpiler({ platform: "node" });
expect(nodeTranspiler.transformSync("module.require('hi' + 123)")).toBe(
'require("hi" + 123);\n'
);
expect(
nodeTranspiler.transformSync("module.require(1 ? 'foo' : 'bar')")
).toBe('require("foo");\n');
expect(nodeTranspiler.transformSync("require(1 ? 'foo' : 'bar')")).toBe(
'require("foo");\n'
);
expect(
nodeTranspiler.transformSync("module.require(unknown ? 'foo' : 'bar')")
).toBe('unknown ? require("foo") : require("bar");\n');
});
describe("regressions", () => {
it("unexpected super", () => {
const input = `
'use strict';
const ErrorReportingMixinBase = require('./mixin-base');
const PositionTrackingPreprocessorMixin = require('../position-tracking/preprocessor-mixin');
const Mixin = require('../../utils/mixin');
class ErrorReportingPreprocessorMixin extends ErrorReportingMixinBase {
constructor(preprocessor, opts) {
super(preprocessor, opts);
this.posTracker = Mixin.install(preprocessor, PositionTrackingPreprocessorMixin);
this.lastErrOffset = -1;
}
_reportError(code) {
//NOTE: avoid reporting error twice on advance/retreat
if (this.lastErrOffset !== this.posTracker.offset) {
this.lastErrOffset = this.posTracker.offset;
super._reportError(code);
}
}
}
module.exports = ErrorReportingPreprocessorMixin;
`;
expect(transpiler.transformSync(input, "js").length > 0).toBe(true);
});
});
describe("scanImports", () => {
it("reports import paths, excluding types", () => {
const imports = transpiler.scanImports(code, "tsx");
expect(imports.filter(({ path }) => path === "remix")).toHaveLength(1);
expect(imports.filter(({ path }) => path === "mod")).toHaveLength(0);
expect(imports.filter(({ path }) => path === "react")).toHaveLength(1);
expect(imports).toHaveLength(2);
});
});
const parsed = (code, trim = true, autoExport = false) => {
if (autoExport) {
code = "export default (" + code + ")";
}
var out = transpiler.transformSync(code, "js");
if (autoExport && out.startsWith("export default ")) {
out = out.substring("export default ".length);
}
if (trim) {
out = out.trim();
if (out.endsWith(";")) {
out = out.substring(0, out.length - 1);
}
return out.trim();
}
return out;
};
const expectPrinted = (code, out) => {
expect(parsed(code, true, true)).toBe(out);
};
const expectPrinted_ = (code, out) => {
expect(parsed(code, !out.endsWith(";\n"), false)).toBe(out);
};
const expectParseError = (code, message) => {
try {
parsed(code, false, false);
} catch (er) {
var err = er;
if (er instanceof AggregateError) {
err = err.errors[0];
}
expect(er.message).toBe(message);
return;
}
throw new Error("Expected parse error for code\n\t" + code);
};
const ts = {
parsed: (code, trim = true, autoExport = false) => {
if (autoExport) {
code = "export default (" + code + ")";
}
var out = transpiler.transformSync(code, "ts");
if (autoExport && out.startsWith("export default ")) {
out = out.substring("export default ".length);
}
if (trim) {
out = out.trim();
if (out.endsWith(";")) {
out = out.substring(0, out.length - 1);
}
return out.trim();
}
return out;
},
expectPrinted: (code, out) => {
expect(ts.parsed(code, true, true)).toBe(out);
},
expectPrinted_: (code, out) => {
expect(ts.parsed(code, !out.endsWith(";\n"), false)).toBe(out);
},
expectParseError: (code, message) => {
try {
ts.parsed(code, false, false);
} catch (er) {
var err = er;
if (er instanceof AggregateError) {
err = err.errors[0];
}
expect(er.message).toBe(message);
return;
}
throw new Error("Expected parse error for code\n\t" + code);
},
};
describe("parser", () => {
it("arrays", () => {
expectPrinted("[]", "[]");
expectPrinted("[,]", "[,]");
expectPrinted("[1]", "[1]");
expectPrinted("[1,]", "[1]");
expectPrinted("[,1]", "[, 1]");
expectPrinted("[1,2]", "[1, 2]");
expectPrinted("[,1,2]", "[, 1, 2]");
expectPrinted("[1,,2]", "[1, , 2]");
expectPrinted("[1,2,]", "[1, 2]");
expectPrinted("[1,2,,]", "[1, 2, ,]");
});
it("exponentiation", () => {
expectPrinted("(delete x) ** 0", "(delete x) ** 0");
expectPrinted("(delete x.prop) ** 0", "(delete x.prop) ** 0");
expectPrinted("(delete x[0]) ** 0", "(delete x[0]) ** 0");
expectPrinted("(delete x?.prop) ** 0", "(delete x?.prop) ** 0");
expectPrinted("(void x) ** 0", "(void x) ** 0");
expectPrinted("(typeof x) ** 0", "(typeof x) ** 0");
expectPrinted("(+x) ** 0", "(+x) ** 0");
expectPrinted("(-x) ** 0", "(-x) ** 0");
expectPrinted("(~x) ** 0", "(~x) ** 0");
expectPrinted("(!x) ** 0", "(!x) ** 0");
expectPrinted("(await x) ** 0", "(await x) ** 0");
expectPrinted("(await -x) ** 0", "(await -x) ** 0");
expectPrinted("--x ** 2", "--x ** 2");
expectPrinted("++x ** 2", "++x ** 2");
expectPrinted("x-- ** 2", "x-- ** 2");
expectPrinted("x++ ** 2", "x++ ** 2");
expectPrinted("(-x) ** 2", "(-x) ** 2");
expectPrinted("(+x) ** 2", "(+x) ** 2");
expectPrinted("(~x) ** 2", "(~x) ** 2");
expectPrinted("(!x) ** 2", "(!x) ** 2");
expectPrinted("(-1) ** 2", "(-1) ** 2");
expectPrinted("(+1) ** 2", "1 ** 2");
expectPrinted("(~1) ** 2", "(~1) ** 2");
expectPrinted("(!1) ** 2", "false ** 2");
expectPrinted("(void x) ** 2", "(void x) ** 2");
expectPrinted("(delete x) ** 2", "(delete x) ** 2");
expectPrinted("(typeof x) ** 2", "(typeof x) ** 2");
expectPrinted("undefined ** 2", "undefined ** 2");
expectParseError("-x ** 2", "Unexpected **");
expectParseError("+x ** 2", "Unexpected **");
expectParseError("~x ** 2", "Unexpected **");
expectParseError("!x ** 2", "Unexpected **");
expectParseError("void x ** 2", "Unexpected **");
expectParseError("delete x ** 2", "Unexpected **");
expectParseError("typeof x ** 2", "Unexpected **");
expectParseError("-x.y() ** 2", "Unexpected **");
expectParseError("+x.y() ** 2", "Unexpected **");
expectParseError("~x.y() ** 2", "Unexpected **");
expectParseError("!x.y() ** 2", "Unexpected **");
expectParseError("void x.y() ** 2", "Unexpected **");
expectParseError("delete x.y() ** 2", "Unexpected **");
expectParseError("typeof x.y() ** 2", "Unexpected **");
expectParseError("delete x ** 0", "Unexpected **");
expectParseError("delete x.prop ** 0", "Unexpected **");
expectParseError("delete x[0] ** 0", "Unexpected **");
expectParseError("delete x?.prop ** 0", "Unexpected **");
expectParseError("void x ** 0", "Unexpected **");
expectParseError("typeof x ** 0", "Unexpected **");
expectParseError("+x ** 0", "Unexpected **");
expectParseError("-x ** 0", "Unexpected **");
expectParseError("~x ** 0", "Unexpected **");
expectParseError("!x ** 0", "Unexpected **");
expectParseError("await x ** 0", "Unexpected **");
expectParseError("await -x ** 0", "Unexpected **");
});
it("await", () => {
expectPrinted("await x", "await x");
expectPrinted("await +x", "await +x");
expectPrinted("await -x", "await -x");
expectPrinted("await ~x", "await ~x");
expectPrinted("await !x", "await !x");
expectPrinted("await --x", "await --x");
expectPrinted("await ++x", "await ++x");
expectPrinted("await x--", "await x--");
expectPrinted("await x++", "await x++");
expectPrinted("await void x", "await void x");
expectPrinted("await typeof x", "await typeof x");
expectPrinted("await (x * y)", "await (x * y)");
expectPrinted("await (x ** y)", "await (x ** y)");
expectPrinted_(
"async function f() { await delete x }",
"async function f() {\n await delete x;\n}"
);
// expectParseError(
// "await delete x",
// "Delete of a bare identifier cannot be used in an ECMAScript module"
// );
});
it("import assert", () => {
expectPrinted_(
`import json from "./foo.json" assert { type: "json" };`,
`import json from "./foo.json"`
);
expectPrinted_(
`import json from "./foo.json";`,
`import json from "./foo.json"`
);
expectPrinted_(
`import("./foo.json", { type: "json" });`,
`import("./foo.json")`
);
});
it("import with unicode escape", () => {
expectPrinted_(
`import { name } from 'mod\\u1011';`,
`import {name} from "mod\\u1011"`
);
});
it("define", () => {
expectPrinted_(
`export default typeof user_undefined === 'undefined';`,
`export default true`
);
expectPrinted_(
`export default typeof user_undefined !== 'undefined';`,
`export default false`
);
expectPrinted_(
`export default typeof user_undefined !== 'undefined';`,
`export default false`
);
expectPrinted_(`export default !user_undefined;`, `export default true`);
});
it("decls", () => {
// expectParseError("var x = 0", "");
// expectParseError("let x = 0", "");
// expectParseError("const x = 0", "");
// expectParseError("for (var x = 0;;) ;", "");
// expectParseError("for (let x = 0;;) ;", "");
// expectParseError("for (const x = 0;;) ;", "");
// expectParseError("for (var x in y) ;", "");
// expectParseError("for (let x in y) ;", "");
// expectParseError("for (const x in y) ;", "");
// expectParseError("for (var x of y) ;", "");
// expectParseError("for (let x of y) ;", "");
// expectParseError("for (const x of y) ;", "");
// expectParseError("var x", "");
// expectParseError("let x", "");
expectParseError("const x", 'The constant "x" must be initialized');
expectParseError("const {}", "This constant must be initialized");
expectParseError("const []", "This constant must be initialized");
// expectParseError("for (var x;;) ;", "");
// expectParseError("for (let x;;) ;", "");
expectParseError(
"for (const x;;) ;",
'The constant "x" must be initialized'
);
expectParseError(
"for (const {};;) ;",
"This constant must be initialized"
);
expectParseError(
"for (const [];;) ;",
"This constant must be initialized"
);
// Make sure bindings are visited during parsing
expectPrinted_("var {[x]: y} = {}", "var { [x]: y } = {}");
expectPrinted_("var {...x} = {}", "var { ...x } = {}");
// Test destructuring patterns
expectPrinted_("var [...x] = []", "var [...x] = []");
expectPrinted_("var {...x} = {}", "var { ...x } = {}");
expectPrinted_(
"export var foo = ([...x] = []) => {}",
"export var foo = ([...x] = []) => {\n}"
);
expectPrinted_(
"export var foo = ({...x} = {}) => {}",
"export var foo = ({ ...x } = {}) => {\n}"
);
expectParseError("var [...x,] = []", 'Unexpected "," after rest pattern');
expectParseError("var {...x,} = {}", 'Unexpected "," after rest pattern');
expectParseError(
"export default function() { return ([...x,] = []) => {} }",
"Unexpected trailing comma after rest element"
);
expectParseError(
"({...x,} = {}) => {}",
"Unexpected trailing comma after rest element"
);
expectPrinted_("[b, ...c] = d", "[b, ...c] = d");
expectPrinted_("([b, ...c] = d)", "[b, ...c] = d");
expectPrinted_("({b, ...c} = d)", "({ b, ...c } = d)");
expectPrinted_("({a = b} = c)", "({ a = b } = c)");
expectPrinted_("({a: b = c} = d)", "({ a: b = c } = d)");
expectPrinted_("({a: b.c} = d)", "({ a: b.c } = d)");
expectPrinted_("[a = {}] = b", "[a = {}] = b");
expectPrinted_("[[...a, b].x] = c", "[[...a, b].x] = c");
expectPrinted_("[{...a, b}.x] = c", "[{ ...a, b }.x] = c");
expectPrinted_("({x: [...a, b].x} = c)", "({ x: [...a, b].x } = c)");
expectPrinted_("({x: {...a, b}.x} = c)", "({ x: { ...a, b }.x } = c)");
expectPrinted_("[x = [...a, b]] = c", "[x = [...a, b]] = c");
expectPrinted_("[x = {...a, b}] = c", "[x = { ...a, b }] = c");
expectPrinted_("({x = [...a, b]} = c)", "({ x = [...a, b] } = c)");
expectPrinted_("({x = {...a, b}} = c)", "({ x = { ...a, b } } = c)");
expectPrinted_("(x = y)", "x = y");
expectPrinted_("([] = [])", "[] = []");
expectPrinted_("({} = {})", "({} = {})");
expectPrinted_("([[]] = [[]])", "[[]] = [[]]");
expectPrinted_("({x: {}} = {x: {}})", "({ x: {} } = { x: {} })");
expectPrinted_("(x) = y", "x = y");
expectParseError("([]) = []", "Invalid assignment target");
expectParseError("({}) = {}", "Invalid assignment target");
expectParseError("[([])] = [[]]", "Invalid assignment target");
expectParseError("({x: ({})} = {x: {}})", "Invalid assignment target");
expectParseError(
"(([]) = []) => {}",
"Unexpected parentheses in binding pattern"
);
expectParseError(
"(({}) = {}) => {}",
"Unexpected parentheses in binding pattern"
);
expectParseError("function f(([]) = []) {}", "Parse error");
expectParseError(
"function f(({}) = {}) {}",
"Parse error"
// 'Expected identifier but found "("\n'
);
expectPrinted_("for (x in y) ;", "for (x in y) {\n}");
expectPrinted_("for ([] in y) ;", "for ([] in y) {\n}");
expectPrinted_("for ({} in y) ;", "for ({} in y) {\n}");
expectPrinted_("for ((x) in y) ;", "for (x in y) {\n}");
expectParseError("for (([]) in y) ;", "Invalid assignment target");
expectParseError("for (({}) in y) ;", "Invalid assignment target");
expectPrinted_("for (x of y) ;", "for (x of y) {\n}");
expectPrinted_("for ([] of y) ;", "for ([] of y) {\n}");
expectPrinted_("for ({} of y) ;", "for ({} of y) {\n}");
expectPrinted_("for ((x) of y) ;", "for (x of y) {\n}");
expectParseError("for (([]) of y) ;", "Invalid assignment target");
expectParseError("for (({}) of y) ;", "Invalid assignment target");
expectParseError("[[...a, b]] = c", 'Unexpected "," after rest pattern');
expectParseError("[{...a, b}] = c", 'Unexpected "," after rest pattern');
expectParseError(
"({x: [...a, b]} = c)",
'Unexpected "," after rest pattern'
);
expectParseError(
"({x: {...a, b}} = c)",
'Unexpected "," after rest pattern'
);
expectParseError("[b, ...c,] = d", 'Unexpected "," after rest pattern');
expectParseError("([b, ...c,] = d)", 'Unexpected "," after rest pattern');
expectParseError("({b, ...c,} = d)", 'Unexpected "," after rest pattern');
expectParseError("({a = b})", 'Unexpected "="');
expectParseError("({x = {a = b}} = c)", 'Unexpected "="');
expectParseError("[a = {b = c}] = d", 'Unexpected "="');
expectPrinted_(
"for ([{a = {}}] in b) {}",
"for ([{ a = {} }] in b) {\n}"
);
expectPrinted_(
"for ([{a = {}}] of b) {}",
"for ([{ a = {} }] of b) {\n}"
);
expectPrinted_("for ({a = {}} in b) {}", "for ({ a = {} } in b) {\n}");
expectPrinted_("for ({a = {}} of b) {}", "for ({ a = {} } of b) {\n}");
expectParseError("({a = {}} in b)", 'Unexpected "="');
expectParseError("[{a = {}}]\nof()", 'Unexpected "="');
expectParseError(
"for ([...a, b] in c) {}",
'Unexpected "," after rest pattern'
);
expectParseError(
"for ([...a, b] of c) {}",
'Unexpected "," after rest pattern'
);
});
it("regexp", () => {
expectPrinted("/x/g", "/x/g");
expectPrinted("/x/i", "/x/i");
expectPrinted("/x/m", "/x/m");
expectPrinted("/x/s", "/x/s");
expectPrinted("/x/u", "/x/u");
expectPrinted("/x/y", "/x/y");
expectPrinted("/gimme/g", "/gimme/g");
expectPrinted("/gimgim/g", "/gimgim/g");
expectParseError(
"/x/msuygig",
'Duplicate flag "g" in regular expression'
);
});
it("identifier escapes", () => {
expectPrinted_("var _\u0076\u0061\u0072", "var _var");
expectParseError(
"var \u0076\u0061\u0072",
'Expected identifier but found "\u0076\u0061\u0072"'
);
expectParseError(
"\\u0076\\u0061\\u0072 foo",
"Unexpected \\u0076\\u0061\\u0072"
);
expectPrinted_("foo._\u0076\u0061\u0072", "foo._var");
expectPrinted_("foo.\u0076\u0061\u0072", "foo.var");
// expectParseError("\u200Ca", 'Unexpected "\\u200c"');
// expectParseError("\u200Da", 'Unexpected "\\u200d"');
});
});
it("private identifiers", () => {
expectParseError("#foo", "Unexpected #foo");
expectParseError("#foo in this", "Unexpected #foo");
expectParseError("this.#foo", 'Expected identifier but found "#foo"');
expectParseError("this?.#foo", 'Expected identifier but found "#foo"');
expectParseError("({ #foo: 1 })", 'Expected identifier but found "#foo"');
expectParseError(
"class Foo { x = { #foo: 1 } }",
'Expected identifier but found "#foo"'
);
expectParseError("class Foo { x = #foo }", 'Expected "in" but found "}"');
expectParseError(
"class Foo { #foo; foo() { delete this.#foo } }",
'Deleting the private name "#foo" is forbidden'
);
expectParseError(
"class Foo { #foo; foo() { delete this?.#foo } }",
'Deleting the private name "#foo" is forbidden'
);
expectParseError(
"class Foo extends Bar { #foo; foo() { super.#foo } }",
'Expected identifier but found "#foo"'
);
expectParseError(
"class Foo { #foo = () => { for (#foo in this) ; } }",
"Unexpected #foo"
);
expectParseError(
"class Foo { #foo = () => { for (x = #foo in this) ; } }",
"Unexpected #foo"
);
expectPrinted_("class Foo { #foo }", "class Foo {\n #foo;\n}");
expectPrinted_("class Foo { #foo = 1 }", "class Foo {\n #foo = 1;\n}");
expectPrinted_(
"class Foo { #foo = #foo in this }",
"class Foo {\n #foo = #foo in this;\n}"
);
expectPrinted_(
"class Foo { #foo = #foo in (#bar in this); #bar }",
"class Foo {\n #foo = #foo in (#bar in this);\n #bar;\n}"
);
expectPrinted_(
"class Foo { #foo() {} }",
"class Foo {\n #foo() {\n }\n}"
);
expectPrinted_(
"class Foo { get #foo() {} }",
"class Foo {\n get #foo() {\n }\n}"
);
expectPrinted_(
"class Foo { set #foo(x) {} }",
"class Foo {\n set #foo(x) {\n }\n}"
);
expectPrinted_(
"class Foo { static #foo }",
"class Foo {\n static #foo;\n}"
);
expectPrinted_(
"class Foo { static #foo = 1 }",
"class Foo {\n static #foo = 1;\n}"
);
expectPrinted_(
"class Foo { static #foo() {} }",
"class Foo {\n static #foo() {\n }\n}"
);
expectPrinted_(
"class Foo { static get #foo() {} }",
"class Foo {\n static get #foo() {\n }\n}"
);
expectPrinted_(
"class Foo { static set #foo(x) {} }",
"class Foo {\n static set #foo(x) {\n }\n}"
);
expectParseError(
"class Foo { #foo = #foo in #bar in this; #bar }",
"Unexpected #bar"
);
expectParseError(
"class Foo { #constructor }",
'Invalid field name "#constructor"'
);
expectParseError(
"class Foo { #constructor() {} }",
'Invalid method name "#constructor"'
);
expectParseError(
"class Foo { static #constructor }",
'Invalid field name "#constructor"'
);
expectParseError(
"class Foo { static #constructor() {} }",
'Invalid method name "#constructor"'
);
expectParseError(
"class Foo { #\\u0063onstructor }",
'Invalid field name "#constructor"'
);
expectParseError(
"class Foo { #\\u0063onstructor() {} }",
'Invalid method name "#constructor"'
);
expectParseError(
"class Foo { static #\\u0063onstructor }",
'Invalid field name "#constructor"'
);
expectParseError(
"class Foo { static #\\u0063onstructor() {} }",
'Invalid method name "#constructor"'
);
const errorText = '"#foo" has already been declared';
expectParseError("class Foo { #foo; #foo }", errorText);
expectParseError("class Foo { #foo; static #foo }", errorText);
expectParseError("class Foo { static #foo; #foo }", errorText);
expectParseError("class Foo { #foo; #foo() {} }", errorText);
expectParseError("class Foo { #foo; get #foo() {} }", errorText);
expectParseError("class Foo { #foo; set #foo(x) {} }", errorText);
expectParseError("class Foo { #foo() {} #foo }", errorText);
expectParseError("class Foo { get #foo() {} #foo }", errorText);
expectParseError("class Foo { set #foo(x) {} #foo }", errorText);
expectParseError("class Foo { get #foo() {} get #foo() {} }", errorText);
expectParseError("class Foo { set #foo(x) {} set #foo(x) {} }", errorText);
expectParseError(
"class Foo { get #foo() {} set #foo(x) {} #foo }",
errorText
);
expectParseError(
"class Foo { set #foo(x) {} get #foo() {} #foo }",
errorText
);
expectPrinted_(
"class Foo { get #foo() {} set #foo(x) { this.#foo } }",
"class Foo {\n get #foo() {\n }\n set #foo(x) {\n this.#foo;\n }\n}"
);
expectPrinted_(
"class Foo { set #foo(x) { this.#foo } get #foo() {} }",
"class Foo {\n set #foo(x) {\n this.#foo;\n }\n get #foo() {\n }\n}"
);
expectPrinted_(
"class Foo { #foo } class Bar { #foo }",
"class Foo {\n #foo;\n}\n\nclass Bar {\n #foo;\n}"
);
expectPrinted_(
"class Foo { foo = this.#foo; #foo }",
"class Foo {\n foo = this.#foo;\n #foo;\n}"
);
expectPrinted_(
"class Foo { foo = this?.#foo; #foo }",
"class Foo {\n foo = this?.#foo;\n #foo;\n}"
);
expectParseError(
"class Foo { #foo } class Bar { foo = this.#foo }",
'Private name "#foo" must be declared in an enclosing class'
);
expectParseError(
"class Foo { #foo } class Bar { foo = this?.#foo }",
'Private name "#foo" must be declared in an enclosing class'
);
expectParseError(
"class Foo { #foo } class Bar { foo = #foo in this }",
'Private name "#foo" must be declared in an enclosing class'
);
expectPrinted_(
`class Foo {
#if
#im() { return this.#im(this.#if) }
static #sf
static #sm() { return this.#sm(this.#sf) }
foo() {
return class {
#inner() {
return [this.#im, this?.#inner, this?.x.#if]
}
}
}
}
`,
`class Foo {
#if;
#im() {
return this.#im(this.#if);
}
static #sf;
static #sm() {
return this.#sm(this.#sf);
}
foo() {
return class {
#inner() {
return [this.#im, this?.#inner, this?.x.#if];
}
};
}
}`
);
});
it("type only exports", () => {
let { expectPrinted_, expectParseError } = ts;
expectPrinted_("export type {foo, bar as baz} from 'bar'", "");
expectPrinted_("export type {foo, bar as baz}", "");
expectPrinted_("export type {foo} from 'bar'; x", "x");
expectPrinted_("export type {foo} from 'bar'\nx", "x");
expectPrinted_("export type {default} from 'bar'", "");
expectPrinted_(
"export { type } from 'mod'; type",
'export { type } from "mod";\ntype'
);
expectPrinted_(
"export { type, as } from 'mod'",
'export { type, as } from "mod"'
);
expectPrinted_(
"export { x, type foo } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, type as } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, type foo as bar } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, type foo as as } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { type as as } from 'mod'; as",
'export { type as as } from "mod";\nas'
);
expectPrinted_(
"export { type as foo } from 'mod'; foo",
'export { type as foo } from "mod";\nfoo'
);
expectPrinted_(
"export { type as type } from 'mod'; type",
'export { type } from "mod";\ntype'
);
expectPrinted_(
"export { x, type as as foo } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, type as as as } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, type type as as } from 'mod'; x",
'export { x } from "mod";\nx'
);
expectPrinted_(
"export { x, \\u0074ype y }; let x, y",
"export { x };\nlet x, y"
);
expectPrinted_(
"export { x, \\u0074ype y } from 'mod'",
'export { x } from "mod"'
);
expectPrinted_(
"export { x, type if } from 'mod'",
'export { x } from "mod"'
);
expectPrinted_("export { x, type y as if }; let x", "export { x };\nlet x");
expectPrinted_("export { type x };", "");
});
it("delete + optional chain", () => {
expectPrinted_("delete foo.bar.baz", "delete foo.bar.baz");
expectPrinted_("delete foo?.bar.baz", "delete foo?.bar.baz");
expectPrinted_("delete foo?.bar?.baz", "delete foo?.bar?.baz");
});
it("useDefineForConst TypeScript class initialization", () => {
var { expectPrinted_ } = ts;
expectPrinted_(
`
class Foo {
constructor(public x: string = "hey") {}
bar: number;
}
`.trim(),
`
class Foo {
x;
constructor(x = "hey") {
this.x = x;
}
bar;
}
`.trim()
);
});
it("class static blocks", () => {
expectPrinted_(
"class Foo { static {} }",
"class Foo {\n static {\n }\n}"
);
expectPrinted_(
"class Foo { static {} x = 1 }",
"class Foo {\n static {\n }\n x = 1;\n}"
);
expectPrinted_(
"class Foo { static { this.foo() } }",
"class Foo {\n static {\n this.foo();\n }\n}"
);
expectParseError(
"class Foo { static { yield } }",
'"yield" is a reserved word and cannot be used in strict mode'
);
expectParseError(
"class Foo { static { await } }",
'The keyword "await" cannot be used here'
);
expectParseError(
"class Foo { static { return } }",
"A return statement cannot be used here"
);
expectParseError(
"class Foo { static { break } }",
'Cannot use "break" here'
);
expectParseError(
"class Foo { static { continue } }",
'Cannot use "continue" here'
);
expectParseError(
"x: { class Foo { static { break x } } }",
'There is no containing label named "x"'
);
expectParseError(
"x: { class Foo { static { continue x } } }",
'There is no containing label named "x"'
);
expectParseError(
"class Foo { get #x() { this.#x = 1 } }",
'Writing to getter-only property "#x" will throw'
);
expectParseError(
"class Foo { get #x() { this.#x += 1 } }",
'Writing to getter-only property "#x" will throw'
);
expectParseError(
"class Foo { set #x(x) { this.#x } }",
'Reading from setter-only property "#x" will throw'
);
expectParseError(
"class Foo { set #x(x) { this.#x += 1 } }",
'Reading from setter-only property "#x" will throw'
);
// Writing to method warnings
expectParseError(
"class Foo { #x() { this.#x = 1 } }",
'Writing to read-only method "#x" will throw'
);
expectParseError(
"class Foo { #x() { this.#x += 1 } }",
'Writing to read-only method "#x" will throw'
);
});
describe("simplification", () => {
it("constant folding", () => {
expectPrinted("1 && 2", "2");
expectPrinted("1 || 2", "1");
expectPrinted("0 && 1", "0");
expectPrinted("0 || 1", "1");
expectPrinted("null ?? 1", "1");
expectPrinted("undefined ?? 1", "1");
expectPrinted("0 ?? 1", "0");
expectPrinted("false ?? 1", "false");
expectPrinted('"" ?? 1', '""');
expectPrinted("typeof undefined", '"undefined"');
expectPrinted("typeof null", '"object"');
expectPrinted("typeof false", '"boolean"');
expectPrinted("typeof true", '"boolean"');
expectPrinted("typeof 123", '"number"');
expectPrinted("typeof 123n", '"bigint"');
expectPrinted("typeof 'abc'", '"string"');
expectPrinted("typeof function() {}", '"function"');
expectPrinted("typeof (() => {})", '"function"');
expectPrinted("typeof {}", "typeof {}");
expectPrinted("typeof []", "typeof []");
expectPrinted("undefined === undefined", "true");
expectPrinted("undefined !== undefined", "false");
expectPrinted("undefined == undefined", "true");
expectPrinted("undefined != undefined", "false");
expectPrinted("null === null", "true");
expectPrinted("null !== null", "false");
expectPrinted("null == null", "true");
expectPrinted("null != null", "false");
expectPrinted("undefined === null", "undefined === null");
expectPrinted("undefined !== null", "undefined !== null");
expectPrinted("undefined == null", "undefined == null");
expectPrinted("undefined != null", "undefined != null");
expectPrinted("true === true", "true");
expectPrinted("true === false", "false");
expectPrinted("true !== true", "false");
expectPrinted("true !== false", "true");
expectPrinted("true == true", "true");
expectPrinted("true == false", "false");
expectPrinted("true != true", "false");
expectPrinted("true != false", "true");
expectPrinted("1 === 1", "true");
expectPrinted("1 === 2", "false");
expectPrinted("1 === '1'", '1 === "1"');
expectPrinted("1 == 1", "true");
expectPrinted("1 == 2", "false");
expectPrinted("1 == '1'", '1 == "1"');
expectPrinted("1 !== 1", "false");
expectPrinted("1 !== 2", "true");
expectPrinted("1 !== '1'", '1 !== "1"');
expectPrinted("1 != 1", "false");
expectPrinted("1 != 2", "true");
expectPrinted("1 != '1'", '1 != "1"');
expectPrinted("'a' === '\\x61'", "true");
expectPrinted("'a' === '\\x62'", "false");
expectPrinted("'a' === 'abc'", "false");
expectPrinted("'a' !== '\\x61'", "false");
expectPrinted("'a' !== '\\x62'", "true");
expectPrinted("'a' !== 'abc'", "true");
expectPrinted("'a' == '\\x61'", "true");
expectPrinted("'a' == '\\x62'", "false");
expectPrinted("'a' == 'abc'", "false");
expectPrinted("'a' != '\\x61'", "false");
expectPrinted("'a' != '\\x62'", "true");
expectPrinted("'a' != 'abc'", "true");
// TODO: string simplification
// expectPrinted("'a' + 'b'", '"ab"');
// expectPrinted("'a' + 'bc'", '"abc"');
// expectPrinted("'ab' + 'c'", '"abc"');
// expectPrinted("x + 'a' + 'b'", 'x + "ab"');
// expectPrinted("x + 'a' + 'bc'", 'x + "abc"');
// expectPrinted("x + 'ab' + 'c'", 'x + "abc"');
// expectPrinted("'a' + 1", '"a" + 1;');
// expectPrinted("x * 'a' + 'b'", 'x * "a" + "b"');
// TODO: string simplification
// expectPrinted("'string' + `template`", "`stringtemplate`");
// expectPrinted("'string' + `a${foo}b`", "`stringa${foo}b`");
// expectPrinted("'string' + tag`template`", '"string" + tag`template`;');
// expectPrinted("`template` + 'string'", "`templatestring`");
// expectPrinted("`a${foo}b` + 'string'", "`a${foo}bstring`");
// expectPrinted("tag`template` + 'string'", 'tag`template` + "string"');
// expectPrinted("`template` + `a${foo}b`", "`templatea${foo}b`");
// expectPrinted("`a${foo}b` + `template`", "`a${foo}btemplate`");
// expectPrinted("`a${foo}b` + `x${bar}y`", "`a${foo}bx${bar}y`");
// expectPrinted(
// "`a${i}${j}bb` + `xxx${bar}yyyy`",
// "`a${i}${j}bbxxx${bar}yyyy`"
// );
// expectPrinted(
// "`a${foo}bb` + `xxx${i}${j}yyyy`",
// "`a${foo}bbxxx${i}${j}yyyy`"
// );
// expectPrinted(
// "`template` + tag`template2`",
// "`template` + tag`template2`"
// );
// expectPrinted(
// "tag`template` + `template2`",
// "tag`template` + `template2`"
// );
expectPrinted("123", "123");
expectPrinted("123 .toString()", "123 .toString()");
expectPrinted("-123", "-123");
expectPrinted("(-123).toString()", "(-123).toString()");
expectPrinted("-0", "-0");
expectPrinted("(-0).toString()", "(-0).toString()");
expectPrinted("-0 === 0", "true");
expectPrinted("NaN", "NaN");
expectPrinted("NaN.toString()", "NaN.toString()");
expectPrinted("NaN === NaN", "false");
expectPrinted("Infinity", "Infinity");
expectPrinted("Infinity.toString()", "Infinity.toString()");
expectPrinted("(-Infinity).toString()", "(-Infinity).toString()");
expectPrinted("Infinity === Infinity", "true");
expectPrinted("Infinity === -Infinity", "false");
expectPrinted("123n === 1_2_3n", "true");
});
describe("type coercions", () => {
const dead = `
if ("") {
TEST_FAIL
}
if (false) {
TEST_FAIL
}
if (0) {
TEST_FAIL
}
if (void 0) {
TEST_FAIL
}
if (null) {
TEST_FAIL
}
var should_be_true = typeof "" === "string" || false
var should_be_false = typeof "" !== "string" && TEST_FAIL;
var should_be_false_2 = typeof true === "string" && TEST_FAIL;
var should_be_false_3 = typeof false === "string" && TEST_FAIL;
var should_be_false_4 = typeof 123n === "string" && TEST_FAIL;
var should_be_false_5 = typeof function(){} === "string" && TEST_FAIL;
var should_be_kept = typeof globalThis.BACON === "string" && TEST_OK;
var should_be_kept_1 = typeof TEST_OK === "string";
var should_be_kept_2 = TEST_OK ?? true;
var should_be_kept_4 = { "TEST_OK": true } ?? TEST_FAIL;
var should_be_false_6 = false ?? TEST_FAIL;
var should_be_true_7 = true ?? TEST_FAIL;
`;
const out = transpiler.transformSync(dead);
for (let line of out.split("\n")) {
it(line, () => {
if (line.includes("should_be_kept")) {
expect(line.includes("TEST_OK")).toBe(true);
}
if (line.includes("should_be_false")) {
if (!line.includes("= false"))
throw new Error(`Expected false in "${line}"`);
expect(line.includes("= false")).toBe(true);
}
if (line.includes("TEST_FAIL")) {
throw new Error(`"${line}"\n\tshould not contain TEST_FAIL`);
}
});
}
});
});
describe("scan", () => {
it("reports all export names", () => {
const { imports, exports } = transpiler.scan(code);
expect(exports[0]).toBe("action");
expect(exports[2]).toBe("loader");
expect(exports[1]).toBe("default");
expect(exports).toHaveLength(3);
expect(imports.filter(({ path }) => path === "remix")).toHaveLength(1);
expect(imports.filter(({ path }) => path === "mod")).toHaveLength(0);
expect(imports.filter(({ path }) => path === "react")).toHaveLength(1);
expect(imports).toHaveLength(2);
});
});
describe("transform", () => {
it("supports macros", async () => {
const out = await transpiler.transform(`
import {keepSecondArgument} from 'macro:${
import.meta.dir
}/macro-check.js';
export default keepSecondArgument("Test failed", "Test passed");
export function otherNamesStillWork() {}
`);
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
// ensure both the import and the macro function call are removed
expect(out.includes("keepSecondArgument")).toBe(false);
expect(out.includes("otherNamesStillWork")).toBe(true);
});
it("sync supports macros", () => {
const out = transpiler.transformSync(`
import {keepSecondArgument} from 'macro:${
import.meta.dir
}/macro-check.js';
export default keepSecondArgument("Test failed", "Test passed");
export function otherNamesStillWork() {
}
`);
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
expect(out.includes("keepSecondArgument")).toBe(false);
expect(out.includes("otherNamesStillWork")).toBe(true);
});
const importLines = [
"import {createElement, bacon} from 'react';",
"import {bacon, createElement} from 'react';",
];
describe("sync supports macros remap", () => {
for (let importLine of importLines) {
it(importLine, () => {
var thisCode = `
${importLine}
export default bacon("Test failed", "Test passed");
export function otherNamesStillWork() {
return createElement("div");
}
`;
var out = transpiler.transformSync(thisCode);
try {
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
expect(out.includes("bacon")).toBe(false);
expect(out.includes("createElement")).toBe(true);
} catch (e) {
console.log("Failing code:\n\n" + out + "\n");
throw e;
}
});
}
});
it("macro remap removes import statement if its the only used one", () => {
const out = transpiler.transformSync(`
import {bacon} from 'react';
export default bacon("Test failed", "Test passed");
`);
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
expect(out.includes("bacon")).toBe(false);
expect(out.includes("import")).toBe(false);
});
it("removes types", () => {
expect(code.includes("mod")).toBe(true);
expect(code.includes("xx")).toBe(true);
expect(code.includes("ActionFunction")).toBe(true);
expect(code.includes("LoaderFunction")).toBe(true);
expect(code.includes("ReactNode")).toBe(true);
expect(code.includes("React")).toBe(true);
expect(code.includes("Component")).toBe(true);
const out = transpiler.transformSync(code);
expect(out.includes("ActionFunction")).toBe(false);
expect(out.includes("LoaderFunction")).toBe(false);
expect(out.includes("mod")).toBe(false);
expect(out.includes("xx")).toBe(false);
expect(out.includes("ReactNode")).toBe(false);
const { exports } = transpiler.scan(out);
exports.sort();
expect(exports[0]).toBe("action");
expect(exports[2]).toBe("loader");
expect(exports[1]).toBe("default");
expect(exports).toHaveLength(3);
});
});
});