Add tests for automatic module location

Author: mrbbot

packages/miniflare/src/index.ts

@@ -564,7 +564,16 @@ export class Miniflare {
 
     this.#disposeController = new AbortController();
     this.#runtimeMutex = new Mutex();
-    this.#initPromise = this.#runtimeMutex.runWith(() => this.#init());
+    this.#initPromise = this.#runtimeMutex
+      .runWith(() => this.#init())
+      .catch((e) => {
+        // If initialisation failed, attempting to `dispose()` this instance
+        // will too. Therefore, remove from the instance registry now, so we
+        // can still test async initialisation failures, without test failures
+        // telling us to `dispose()` the instance.
+        maybeInstanceRegistry?.delete(this);
+        throw e;
+      });
   }
 
   #initPlugins() {

packages/miniflare/test/fixtures/modules/add.wasm

@@ -0,0 +1,2 @@
+// Test `ExportAllDeclaration`
+export * from "./blobs.mjs";

packages/miniflare/test/fixtures/modules/blobs-indirect.mjs

@@ -0,0 +1,3 @@
+// Test `ExportNamedDeclaration`
+export { default as text } from "./blobs/text.txt";
+export { default as data } from "./blobs/data.bin";

packages/miniflare/test/fixtures/modules/blobs.mjs

@@ -0,0 +1 @@
+Hello! 🤖

packages/miniflare/test/fixtures/modules/blobs/data.bin

@@ -0,0 +1 @@
+Hello! 👋

packages/miniflare/test/fixtures/modules/blobs/text.txt

@@ -0,0 +1,7 @@
+import cyclic2 from "./cyclic2.mjs";
+
+export const pong = "pong";
+
+export function ping() {
+  return cyclic2();
+}

packages/miniflare/test/fixtures/modules/cyclic/cyclic1.mjs

@@ -0,0 +1,5 @@
+import * as cyclic1 from "./cyclic1.mjs";
+
+export default function () {
+  return cyclic1.pong;
+}

packages/miniflare/test/fixtures/modules/cyclic/cyclic2.mjs

@@ -0,0 +1,7 @@
+import * as cyclic1 from "./cyclic1.mjs";
+
+export default {
+  async fetch() {
+    return new Response(cyclic1.ping());
+  }
+}

packages/miniflare/test/fixtures/modules/cyclic/index.mjs

@@ -0,0 +1,2 @@
+const id = "./index.cjs";
+require(id);