Use URL to get path to wasm asset

host/javascript/src/common/index.ts

@@ -1,5 +1,6 @@
 export { App, AsyncMutex } from './app.js';
-export type { TextCoder, FileSystem, Timers, Network, WasiContext, Persistence } from './interfaces.js';
+export * from './error.js';
 export { HandleMap } from './handle_map.js';
+export type { FileSystem, Network, Persistence, TextCoder, Timers, WasiContext } from './interfaces.js';
 export { SecurityValuesMap } from './security.js';
-export * from './error.js';
+export * from './wasm.js';

host/javascript/src/common/wasm.ts

@@ -0,0 +1,3 @@
+export function corePath(): string {
+  return process.env.CORE_PATH ?? new URL('../assets/core-async.wasm', import.meta.url).pathname;
+}

host/javascript/src/node/index.test.ts

@@ -1,5 +1,3 @@
-import { jest } from '@jest/globals';
-
 import { Server, createServer as httpCreateServer } from 'node:http';
 import { fileURLToPath } from 'node:url';
 import { resolve as resolvePath, dirname } from 'node:path';

host/javascript/src/node/index.ts

@@ -17,11 +17,10 @@ import {
   Persistence
 } from '../common/index.js';
 import { fetchErrorToHostError, systemErrorToWasiError } from './error.js';
-import { loadCoreFile } from './wasm.js';
+import { corePath } from '../common/wasm.js';
 
 export { PerformError, UnexpectedError, ValidationError } from '../common/index.js';
 export { fetchErrorToHostError, systemErrorToWasiError } from './error.js';
-export { corePath, loadCoreFile } from './wasm.js';
 
 const ASSETS_FOLDER = 'superface';
 
@@ -223,7 +222,7 @@ class InternalClient {
       }
 
       await this.app.loadCore(
-        await loadCoreFile()
+        await fs.readFile(corePath())
       );
       await this.app.init(new WASI({ env: process.env, version: 'preview1' } as any)); // TODO: node typings do not include version https://github.com/DefinitelyTyped/DefinitelyTyped/blob/master/types/node/wasi.d.ts#L68-L110