feat: add unit test

packages/@jsii/kernel/lib/api.ts

@@ -103,13 +103,13 @@ export interface LoadResponse {
 export interface InvokeScriptRequest {
   readonly pkgname: string;
   readonly script: string;
-  readonly args?: any[];
+  readonly args?: string[];
 }
 
 export interface InvokeScriptResponse {
   readonly status: number | null;
-  readonly stdout: string;
-  readonly stderr: string;
+  readonly stdout: Buffer;
+  readonly stderr: Buffer;
   readonly output: string[];
 }
 

packages/@jsii/kernel/lib/kernel.ts

@@ -140,12 +140,15 @@ export class Kernel {
     req: api.InvokeScriptRequest,
   ): api.InvokeScriptResponse {
     const result = cp.spawnSync(
-      path.join(this._getPackageDir(req.pkgname), req.script),
-      req.args,
+      'node',
+      [path.join(this._getPackageDir(req.pkgname), req.script)].concat(
+        req.args ?? [],
+      ),
+      { encoding: 'utf-8' },
     );
 
     return {
-      output: result.output,
+      output: [path.join(this._getPackageDir(req.pkgname), req.script)],
       stdout: result.stdout,
       stderr: result.stderr,
       status: result.status,

packages/@jsii/kernel/test/kernel.test.ts

@@ -2133,6 +2133,17 @@ defineTest('Override transitive property', (sandbox) => {
   expect(propValue).toBe('N3W');
 });
 
+defineTest('invokeBinScript() return output', (sandbox) => {
+  sandbox.create({ fqn: 'jsii-calc.Calculator' });
+
+  const result = sandbox.invokeBinScript({
+    pkgname: 'jsii-calc',
+    script: 'bin/calc',
+  });
+
+  expect(result).toEqual('Hello World!\n');
+});
+
 // =================================================================================================
 
 const testNames: { [name: string]: boolean } = {};

packages/@jsii/python-runtime/tests/test_compliance.py

@@ -85,6 +85,7 @@
 from scope.jsii_calc_lib import IFriendly, EnumFromScopedModule, Number
 from scope.jsii_calc_lib.custom_submodule_name import IReflectable, ReflectableEntry
 
+from subprocess import Popen, PIPE, STDOUT
 
 # Note: The names of these test functions have been chosen to map as closely to the
 #       Java Compliance tests as possible.

packages/jsii-calc/bin/calc

@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('./calc.js');

packages/jsii-calc/bin/calc.ts

@@ -0,0 +1,5 @@
+#!/usr/bin/env node
+
+/* eslint-disable no-console */
+
+console.info('Hello World!');

packages/jsii-calc/package.json

@@ -14,6 +14,9 @@
   "bugs": {
     "url": "https://github.com/aws/jsii/issues"
   },
+  "bin": {
+    "calc": "bin/calc"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/aws/jsii.git",

packages/jsii-calc/test/assembly.jsii

@@ -7,6 +7,9 @@
     ],
     "url": "https://aws.amazon.com"
   },
+  "bin": {
+    "calc": "bin/calc"
+  },
   "bundled": {
     "@fixtures/jsii-calc-bundled": "^0.19.0"
   },
@@ -14229,5 +14232,5 @@
     }
   },
   "version": "0.0.0",
-  "fingerprint": "azqNkkl+/4FLzTVBLkOyHcokS4xLoYtHsri0z9kIehQ="
+  "fingerprint": "QHc8YZS13IljwCQpg6AZlBxIZvkAbfnCFh6Vi+e0Cgg="
 }