Initial Commit

packages/foundation/data/mime/tests/tree-shake.test.ts

@@ -0,0 +1,52 @@
+/**
+ * Tree-shake guard: verifies subpath imports work independently and the
+ * `sideEffects` allowlist is narrowly scoped (only the magic-byte
+ * signature registry is preserved).
+ */
+import { describe, expect, it } from "@suaveplan/testing/runner";
+import pkg from "../package.json";
+
+describe("tree-shake compatibility", () => {
+    it("package.json sideEffects allowlist is narrow", {
+        timeout: 5000,
+    }, () => {
+        // The magic-byte signature registry registers entries via the
+        // side-effecting `signatures/index.ts` module — keep it on the
+        // sideEffects allowlist so bundlers don't tree-shake the
+        // registration loop. Every OTHER module must be side-effect-free.
+        expect(pkg.sideEffects).toEqual([
+            "**/detection/from-magic-bytes/signatures/index.{ts,js}",
+        ]);
+    });
+
+    it("has subpath exports for core modules", { timeout: 5000 }, () => {
+        const exports = pkg.exports as Record<string, unknown>;
+        expect(exports["."]).toBeDefined();
+        expect(exports["./content-type"]).toBeDefined();
+        expect(exports["./detection"]).toBeDefined();
+        expect(exports["./db"]).toBeDefined();
+        expect(exports["./charset"]).toBeDefined();
+        expect(exports["./errors"]).toBeDefined();
+        expect(exports["./schemas"]).toBeDefined();
+    });
+});
+
+describe("subpath import smoke test", () => {
+    it("can import from content-type subpath", { timeout: 30000 }, async () => {
+        // Dynamic import simulates tree-shaking consumer
+        const m = await import("../src/content-type/index.js");
+        expect(typeof m.parseContentType).toBe("function");
+        expect(typeof m.formatContentType).toBe("function");
+    });
+
+    it("can import from charset subpath", { timeout: 30000 }, async () => {
+        const m = await import("../src/charset/index.js");
+        expect(typeof m.sniffBom).toBe("function");
+    });
+
+    it("can import from db subpath", { timeout: 30000 }, async () => {
+        const m = await import("../src/db/index.js");
+        expect(typeof m.getMimeEntry).toBe("function");
+        expect(Array.isArray(m.BUILTIN_DB)).toBe(true);
+    });
+});