runtime/observatory/tests/service/evaluate_in_frame_with_scope_test.dart

// Copyright (c) 2017, 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.

import 'dart:developer';

import 'package:observatory/service_io.dart';
import 'package:test/test.dart';

import 'service_test_common.dart';
import 'test_helper.dart';

var thing1;
var thing2;

testeeMain() {
  thing1 = 3;
  thing2 = 4;
  foo(42, 1984);
}

foo(x, y) {
  var local = x + y;
  debugger();
  return local;
}

var tests = <IsolateTest>[
  hasStoppedAtBreakpoint,
  (Isolate isolate) async {
    // Make sure we are in the right place.
    var stack = await isolate.getStack();
    expect(stack.type, equals('Stack'));
    expect(stack['frames'].length, greaterThanOrEqualTo(1));
    expect(stack['frames'][0].function.name, equals('foo'));

    Library lib = await isolate.rootLibrary.load() as Library;
    Field thing1Field = await lib.variables
        .singleWhere((v) => v.name == "thing1")
        .load() as Field;
    var thing1 = thing1Field.staticValue!;
    print(thing1);
    Field thing2Field = await lib.variables
        .singleWhere((v) => v.name == "thing2")
        .load() as Field;
    var thing2 = thing2Field.staticValue!;
    print(thing2);

    ServiceObject result = await isolate.evalFrame(0, "x + y + a + b",
        scope: <String, ServiceObject>{"a": thing1, "b": thing2});
    expect(result, isA<Instance>());
    print(result);
    expect((result as Instance).valueAsString, equals('2033'));

    result = await isolate.evalFrame(0, "local + a + b",
        scope: <String, ServiceObject>{"a": thing1, "b": thing2});
    expect(result, isA<Instance>());
    print(result);
    expect((result as Instance).valueAsString, equals('2033'));

    // Note the eval's scope is shadowing the locals' scope.
    result = await isolate.evalFrame(0, "x + y",
        scope: <String, ServiceObject>{"x": thing1, "y": thing2});
    expect(result, isA<Instance>());
    print(result);
    expect((result as Instance).valueAsString, equals('7'));

    DartError errorResult = await lib.evaluate("x + y",
        scope: <String, ServiceObject>{"x": lib, "y": lib}) as DartError;
    print(errorResult);
    expect(errorResult.toString(),
        contains("Cannot evaluate against a VM-internal object"));

    errorResult = await lib.evaluate("x + y",
            scope: <String, ServiceObject>{"not&an&identifier": thing1})
        as DartError;
    print(errorResult);
    expect(errorResult.toString(), contains("invalid 'scope' parameter"));
  },
];

main(args) => runIsolateTests(args, tests, testeeConcurrent: testeeMain);