pkg/wasm/test/fn_import_test.dart

// Copyright (c) 2021, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// Test that we can load a wasm module, find a function, and call it.
import 'dart:typed_data';

import 'package:test/test.dart';
import 'package:wasm/wasm.dart';

void main() {
  test('function import', () {
    // void reportStuff() { report(123, 456); }
    var data = Uint8List.fromList([
      0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x09, 0x02, 0x60, //
      0x02, 0x7e, 0x7e, 0x00, 0x60, 0x00, 0x00, 0x02, 0x0e, 0x01, 0x03, 0x65,
      0x6e, 0x76, 0x06, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x00, 0x00, 0x03,
      0x02, 0x01, 0x01, 0x04, 0x05, 0x01, 0x70, 0x01, 0x01, 0x01, 0x05, 0x03,
      0x01, 0x00, 0x02, 0x06, 0x08, 0x01, 0x7f, 0x01, 0x41, 0x80, 0x88, 0x04,
      0x0b, 0x07, 0x18, 0x02, 0x06, 0x6d, 0x65, 0x6d, 0x6f, 0x72, 0x79, 0x02,
      0x00, 0x0b, 0x72, 0x65, 0x70, 0x6f, 0x72, 0x74, 0x53, 0x74, 0x75, 0x66,
      0x66, 0x00, 0x01, 0x0a, 0x10, 0x01, 0x0e, 0x00, 0x42, 0xfb, 0x00, 0x42,
      0xc8, 0x03, 0x10, 0x80, 0x80, 0x80, 0x80, 0x00, 0x0b,
    ]);

    var reportX = -1;
    var reportY = -1;

    var inst = WasmModule(data).instantiate().addFunction('env', 'report',
        (int x, int y) {
      reportX = x;
      reportY = y;
    }).build();
    var fn = inst.lookupFunction('reportStuff');
    fn();
    expect(123, reportX);
    expect(456, reportY);
  });
}