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424import { describe, expect } from "bun:test";
import { itBundled } from "./expectBundled";
describe("bundler", () => {
itBundled("bundler/__promiseAll is tree-shaken when only one async import exists but __esm remains", {
files: {
"/entry.ts": `
const { AsyncEntryPoint } = await import("./AsyncEntryPoint");
AsyncEntryPoint();
export {};
`,
"/AsyncEntryPoint.ts": `
export async function AsyncEntryPoint() {
const { BaseElement } = await import("./BaseElement");
console.log("Launching AsyncEntryPoint", BaseElement());
}
`,
"/BaseElement.ts": `
import { StoreDependency } from "./StoreDependency";
import { BaseElementImport } from "./BaseElementImport";
const depValue = StoreDependency();
export const formValue = {
key: depValue,
};
export const listValue = {
key: depValue + "value",
};
export function BaseElement() {
console.log("BaseElement called", BaseElementImport());
return BaseElementImport();
}
`,
"/BaseElementImport.ts": `
import { SecondElementImport } from "./SecondElementImport";
export function BaseElementImport() {
console.log("BaseElementImport called", SecondElementImport());
return SecondElementImport();
}
`,
"/SecondElementImport.ts": `
import { formValue } from "./BaseElement";
export function SecondElementImport() {
console.log("SecondElementImport called", formValue.key);
return formValue.key;
}
`,
"/StoreDependency.ts": `
import { somePromise } from "./StoreDependencyAsync";
export function StoreDependency() {
return "A string from StoreFunc" + somePromise;
}
`,
"/StoreDependencyAsync.ts": `
export const somePromise = await Promise.resolve("Hello World");
`,
},
format: "esm",
target: "browser",
sourceMap: "linked",
minifySyntax: false,
minifyWhitespace: false,
minifyIdentifiers: false,
run: {
partialStdout: "Launching AsyncEntryPoint",
validate({ stderr }) {
expect(stderr).not.toContain('await" can only be used inside an "async" function');
},
},
onAfterBundle(api) {
const bundled = api.readFile("out.js");
expect(bundled).toMatchInlineSnapshot(`
"var __defProp = Object.defineProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, {
get: all[name],
enumerable: true,
configurable: true,
set: (newValue) => all[name] = () => newValue
});
};
var __esm = (fn, res) => () => (fn && (res = fn(fn = 0)), res);
var __promiseAll = (args) => Promise.all(args);
// StoreDependencyAsync.ts
var somePromise;
var init_StoreDependencyAsync = __esm(async () => {
somePromise = await Promise.resolve("Hello World");
});
// StoreDependency.ts
function StoreDependency() {
return "A string from StoreFunc" + somePromise;
}
var init_StoreDependency = __esm(async () => {
await init_StoreDependencyAsync();
});
// SecondElementImport.ts
function SecondElementImport() {
console.log("SecondElementImport called", formValue.key);
return formValue.key;
}
var init_SecondElementImport = __esm(async () => {
await init_BaseElement();
});
// BaseElementImport.ts
function BaseElementImport() {
console.log("BaseElementImport called", SecondElementImport());
return SecondElementImport();
}
var init_BaseElementImport = __esm(async () => {
await init_SecondElementImport();
});
// BaseElement.ts
var exports_BaseElement = {};
__export(exports_BaseElement, {
listValue: () => listValue,
formValue: () => formValue,
BaseElement: () => BaseElement
});
function BaseElement() {
console.log("BaseElement called", BaseElementImport());
return BaseElementImport();
}
var depValue, formValue, listValue;
var init_BaseElement = __esm(async () => {
await __promiseAll([
init_StoreDependency(),
init_BaseElementImport()
]);
depValue = StoreDependency();
formValue = {
key: depValue
};
listValue = {
key: depValue + "value"
};
});
// AsyncEntryPoint.ts
var exports_AsyncEntryPoint = {};
__export(exports_AsyncEntryPoint, {
AsyncEntryPoint: () => AsyncEntryPoint
});
async function AsyncEntryPoint() {
const { BaseElement: BaseElement2 } = await init_BaseElement().then(() => exports_BaseElement);
console.log("Launching AsyncEntryPoint", BaseElement2());
}
// entry.ts
var { AsyncEntryPoint: AsyncEntryPoint2 } = await Promise.resolve().then(() => exports_AsyncEntryPoint);
AsyncEntryPoint2();
//# debugId=741426CCC2D50C3364756E2164756E21
//# sourceMappingURL=out.js.map
"
`);
// MUST have __esm because of circular dependency requiring wrapping
expect(bundled).toContain("__esm");
expect(bundled).toContain("var init_");
// Should have __promiseAll because BaseElement has multiple dependencies
// even though only one is async (due to circular deps both need to be awaited)
expect(bundled).toContain("__promiseAll");
expect(bundled).toContain("var __promiseAll = ");
// Verify it's used with both dependencies
expect(bundled).toMatch(/await\s+__promiseAll\s*\(\s*\[/);
},
});
itBundled("bundler/__promiseAll is included when multiple async imports exist with __esm", {
files: {
"/entry.ts": `
const { AsyncEntryPoint } = await import("./AsyncEntryPoint");
AsyncEntryPoint();
export {};
`,
"/AsyncEntryPoint.ts": `
export async function AsyncEntryPoint() {
const { BaseElement } = await import("./BaseElement");
console.log("Launching AsyncEntryPoint", BaseElement());
}
`,
"/BaseElement.ts": `
import { StoreDependency } from "./StoreDependency";
import { StoreDependency2 } from "./StoreDependency2";
import { BaseElementImport } from "./BaseElementImport";
const depValue = StoreDependency();
const depValue2 = StoreDependency2();
export const formValue = {
key: depValue + depValue2,
};
export const listValue = {
key: depValue + "value",
};
export function BaseElement() {
console.log("BaseElement called", BaseElementImport());
return BaseElementImport();
}
`,
"/BaseElementImport.ts": `
import { SecondElementImport } from "./SecondElementImport";
export function BaseElementImport() {
console.log("BaseElementImport called", SecondElementImport());
return SecondElementImport();
}
`,
"/SecondElementImport.ts": `
import { formValue } from "./BaseElement";
export function SecondElementImport() {
console.log("SecondElementImport called", formValue.key);
return formValue.key;
}
`,
"/StoreDependency.ts": `
import { somePromise } from "./StoreDependencyAsync";
export function StoreDependency() {
return "A string from StoreFunc" + somePromise;
}
`,
"/StoreDependencyAsync.ts": `
export const somePromise = await Promise.resolve("Hello World");
`,
"/StoreDependency2.ts": `
import { somePromise2 } from "./StoreDependencyAsync2";
export function StoreDependency2() {
return "Another string" + somePromise2;
}
`,
"/StoreDependencyAsync2.ts": `
export const somePromise2 = await Promise.resolve(" World2");
`,
},
format: "esm",
target: "browser",
sourceMap: "linked",
minifySyntax: false,
minifyWhitespace: false,
minifyIdentifiers: false,
run: {
partialStdout: "Launching AsyncEntryPoint",
validate({ stderr }) {
expect(stderr).not.toContain('await" can only be used inside an "async" function');
},
},
onAfterBundle(api) {
const bundled = api.readFile("out.js");
// MUST have __esm because of circular dependency requiring wrapping
expect(bundled).toContain("__esm");
expect(bundled).toContain("var init_");
// MUST have __promiseAll since there are TWO async dependencies
expect(bundled).toContain("__promiseAll");
expect(bundled).toContain("var __promiseAll = ");
// Verify it's actually used in the code with multiple async deps
expect(bundled).toMatch(/await\s+__promiseAll\s*\(\s*\[/);
},
});
itBundled("bundler/__promiseAll is tree-shaken when no async imports despite circular deps with __esm", {
files: {
"/entry.ts": `
const { AsyncEntryPoint } = await import("./AsyncEntryPoint");
AsyncEntryPoint();
export {};
`,
"/AsyncEntryPoint.ts": `
export async function AsyncEntryPoint() {
const { BaseElement } = await import("./BaseElement");
console.log("Launching AsyncEntryPoint", BaseElement());
}
`,
"/BaseElement.ts": `
import { BaseElementImport } from "./BaseElementImport";
export const formValue = {
key: "static value",
};
export const listValue = {
key: "static list value",
};
export function BaseElement() {
console.log("BaseElement called", BaseElementImport());
return BaseElementImport();
}
`,
"/BaseElementImport.ts": `
import { SecondElementImport } from "./SecondElementImport";
export function BaseElementImport() {
console.log("BaseElementImport called", SecondElementImport());
return SecondElementImport();
}
`,
"/SecondElementImport.ts": `
import { formValue } from "./BaseElement";
export function SecondElementImport() {
console.log("SecondElementImport called", formValue.key);
return formValue.key;
}
`,
},
format: "esm",
target: "browser",
sourceMap: "linked",
minifySyntax: false,
minifyWhitespace: false,
minifyIdentifiers: false,
run: {
partialStdout: "Launching AsyncEntryPoint",
validate({ stderr }) {
expect(stderr).not.toContain('await" can only be used inside an "async" function');
},
},
onAfterBundle(api) {
const bundled = api.readFile("out.js");
expect(bundled).toMatchInlineSnapshot(`
"var __defProp = Object.defineProperty;
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, {
get: all[name],
enumerable: true,
configurable: true,
set: (newValue) => all[name] = () => newValue
});
};
var __esm = (fn, res) => () => (fn && (res = fn(fn = 0)), res);
// SecondElementImport.ts
function SecondElementImport() {
console.log("SecondElementImport called", formValue.key);
return formValue.key;
}
var init_SecondElementImport = __esm(() => {
init_BaseElement();
});
// BaseElementImport.ts
function BaseElementImport() {
console.log("BaseElementImport called", SecondElementImport());
return SecondElementImport();
}
var init_BaseElementImport = __esm(() => {
init_SecondElementImport();
});
// BaseElement.ts
var exports_BaseElement = {};
__export(exports_BaseElement, {
listValue: () => listValue,
formValue: () => formValue,
BaseElement: () => BaseElement
});
function BaseElement() {
console.log("BaseElement called", BaseElementImport());
return BaseElementImport();
}
var formValue, listValue;
var init_BaseElement = __esm(() => {
init_BaseElementImport();
formValue = {
key: "static value"
};
listValue = {
key: "static list value"
};
});
// AsyncEntryPoint.ts
var exports_AsyncEntryPoint = {};
__export(exports_AsyncEntryPoint, {
AsyncEntryPoint: () => AsyncEntryPoint
});
async function AsyncEntryPoint() {
const { BaseElement: BaseElement2 } = await Promise.resolve().then(() => (init_BaseElement(), exports_BaseElement));
console.log("Launching AsyncEntryPoint", BaseElement2());
}
// entry.ts
var { AsyncEntryPoint: AsyncEntryPoint2 } = await Promise.resolve().then(() => exports_AsyncEntryPoint);
AsyncEntryPoint2();
//# debugId=27B6A8D5F1ED83DA64756E2164756E21
//# sourceMappingURL=out.js.map
"
`);
// MUST have __esm because of circular dependency requiring wrapping
expect(bundled).toContain("__esm");
expect(bundled).toContain("var init_");
// Currently __promiseAll is always included with ESM wrappers (not tree-shaken)
// but it shouldn't be used since there are no async dependencies
expect(bundled).not.toContain("__promiseAll");
expect(bundled).not.toContain("var __promiseAll = ");
// Verify it's NOT actually used in any init functions
expect(bundled).not.toMatch(/await\s+__promiseAll\s*\(/);
},
});
});