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import { it, expect } from "bun:test";
import { mkdirSync, writeFileSync } from "fs";
import { join } from "path";
it("import.meta.resolve", async () => {
expect(await import.meta.resolve("./resolve.test.js")).toBe(import.meta.path);
expect(await import.meta.resolve("./resolve.test.js", import.meta.path)).toBe(
import.meta.path
);
expect(
// optional second param can be any path, including a dir
await import.meta.resolve(
"./bunjs-only-snippets/resolve.test.js",
join(import.meta.path, "../")
)
).toBe(import.meta.path);
// can be a package path
expect(
(await import.meta.resolve("react", import.meta.path)).length > 0
).toBe(true);
// file extensions are optional
expect(await import.meta.resolve("./resolve.test")).toBe(import.meta.path);
// works with tsconfig.json "paths"
expect(await import.meta.resolve("foo/bar")).toBe(
join(import.meta.path, "../baz.js")
);
// works with package.json "exports"
writePackageJSONExportsFixture();
expect(await import.meta.resolve("package-json-exports/baz")).toBe(
join(import.meta.path, "../node_modules/package-json-exports/foo/bar.js")
);
// works with TypeScript compiler edgecases like:
// - If the file ends with .js and it doesn't exist, try again with .ts and .tsx
expect(await import.meta.resolve("./resolve-typescript-file.js")).toBe(
join(import.meta.path, "../resolve-typescript-file.tsx")
);
expect(await import.meta.resolve("./resolve-typescript-file.tsx")).toBe(
join(import.meta.path, "../resolve-typescript-file.tsx")
);
// throws a ResolveError on failure
try {
await import.meta.resolve("THIS FILE DOESNT EXIST");
throw new Error("Test failed");
} catch (exception) {
expect(exception instanceof ResolveError).toBe(true);
expect(exception.referrer).toBe(import.meta.path);
expect(exception.name).toBe("ResolveError");
}
});
// the slightly lower level API, which doesn't prefill the second param
// and expects a directory instead of a filepath
it("Bun.resolve", async () => {
expect(await Bun.resolve("./resolve.test.js", import.meta.dir)).toBe(
import.meta.path
);
});
// synchronous
it("Bun.resolveSync", () => {
expect(Bun.resolveSync("./resolve.test.js", import.meta.dir)).toBe(
import.meta.path
);
});
function writePackageJSONExportsFixture() {
try {
mkdirSync(
join(import.meta.dir, "./node_modules/package-json-exports/foo"),
{
recursive: true,
}
);
} catch (exception) {}
writeFileSync(
join(import.meta.dir, "./node_modules/package-json-exports/foo/bar.js"),
"export const bar = 1;"
);
writeFileSync(
join(import.meta.dir, "./node_modules/package-json-exports/package.json"),
JSON.stringify(
{
name: "package-json-exports",
exports: {
"./baz": "./foo/bar.js",
},
},
null,
2
)
);
}
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