import { readFileSync } from "node:fs";
import { join } from "node:path";
import { describe, expect, it } from "@suaveplan/testing/runner";

describe("tree-shake: main bundle isolation", () => {
    it("package.json has sideEffects: false", { timeout: 5000 }, () => {
        const pkgPath = join(import.meta.dirname, "..", "package.json");
        const pkg = JSON.parse(readFileSync(pkgPath, "utf-8")) as {
            sideEffects?: boolean;
        };
        expect(pkg.sideEffects).toBe(false);
    });

    it("dist/index.js does not reference serialize-javascript", {
        timeout: 5000,
    }, () => {
        const distPath = join(import.meta.dirname, "..", "dist", "index.js");
        let content: string;
        try {
            content = readFileSync(distPath, "utf-8");
        } catch {
            // Build hasn't run yet in test-only mode — skip gracefully.
            return;
        }
        expect(content).not.toContain("serialize-javascript");
    });
});