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import { expect, it, describe } from "bun:test";
describe("Bun.Transpiler", () => {
const transpiler = new Bun.Transpiler({
loader: "tsx",
define: {
"process.env.NODE_ENV": JSON.stringify("development"),
},
platform: "browser",
});
const code = `import { useParams } from "remix";
import type { LoaderFunction, ActionFunction } from "remix";
export const loader: LoaderFunction = async ({
params
}) => {
console.log(params.postId);
};
export const action: ActionFunction = async ({
params
}) => {
console.log(params.postId);
};
export default function PostRoute() {
const params = useParams();
console.log(params.postId);
}
`;
describe("scanImports", () => {
it("reports import paths, excluding types", () => {
const imports = transpiler.scanImports(code);
expect(imports.filter(({ path }) => path === "remix")).toHaveLength(1);
});
});
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);
});
});
describe("transform", () => {
it("supports macros", async () => {
const out = await transpiler.transform(`
import {keepSecondArgument} from 'macro:${
import.meta.dir
}/macro-check.js';
export default keepSecondArgument("Test failed", "Test passed");
`);
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
// ensure both the import and the macro function call are removed
expect(out.includes("keepSecondArgument")).toBe(false);
});
it("sync supports macros", async () => {
const out = transpiler.transformSync(`
import {keepSecondArgument} from 'macro:${
import.meta.dir
}/macro-check.js';
export default keepSecondArgument("Test failed", "Test passed");
`);
expect(out.includes("Test failed")).toBe(false);
expect(out.includes("Test passed")).toBe(true);
expect(out.includes("keepSecondArgument")).toBe(false);
});
it("removes types", () => {
expect(code.includes("ActionFunction")).toBe(true);
expect(code.includes("LoaderFunction")).toBe(true);
const out = transpiler.transformSync(code);
expect(out.includes("ActionFunction")).toBe(false);
expect(out.includes("LoaderFunction")).toBe(false);
const { exports } = transpiler.scan(out);
expect(exports[0]).toBe("action");
expect(exports[2]).toBe("loader");
expect(exports[1]).toBe("default");
expect(exports).toHaveLength(3);
});
});
});
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