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Use evaluate instead of periodic timer to test dot shorthands (#2687)
Fixes #2638 Fields are cached after their first execution. When debugging, this means we may not hit the body of the field when using the AMD module format. The DDC library bundle format always has a getter for fields, even with the cached value, however. To make the test consistent, we should avoid any previous executions of the field by using an evaluate call instead of a periodic timer in main. This requires moving the dot shorthands test to its own fixture.
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-47
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6 files changed

+99
-47
lines changed

‎dwds/test/fixtures/project.dart‎

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@@ -121,6 +121,14 @@ class TestProject {
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htmlEntryFileName: 'index.html',
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);
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static final testDotShorthands = TestProject._(
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packageName: '_test_dot_shorthands',
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packageDirectory: '_test_dot_shorthands',
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webAssetsPath: 'web',
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dartEntryFileName: 'main.dart',
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htmlEntryFileName: 'index.html',
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);
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static final testHotRestart1 = TestProject._(
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packageName: '_test_hot_restart1',
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packageDirectory: '_test_hot_restart1',

‎dwds/test/instances/common/dot_shorthands_common.dart‎

Lines changed: 38 additions & 16 deletions
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@@ -2,7 +2,6 @@
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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5-
import 'package:dwds/src/services/expression_compiler.dart' show ModuleFormat;
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import 'package:path/path.dart' show basename;
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import 'package:test/test.dart';
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import 'package:test_common/logging.dart';
@@ -20,7 +19,7 @@ void runTests({
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required bool canaryFeatures,
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required bool debug,
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}) {
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final context = TestContext(TestProject.testExperiment, provider);
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final context = TestContext(TestProject.testDotShorthands, provider);
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final testInspector = TestInspector(context);
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late VmService service;
@@ -73,8 +72,8 @@ void runTests({
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await context.tearDown();
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});
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76-
test('expression evaluation and single-stepping', () async {
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await onBreakpoint('testDotShorthands', (event) async {
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test('expression evaluation', () async {
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final bp = onBreakpoint('testDotShorthands', (event) async {
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final frame = event.topFrame!.index!;
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var instanceRef = await getInstanceRef(frame, '(c = .two).value');
@@ -86,22 +85,36 @@ void runTests({
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instanceRef = await getInstanceRef(frame, '(c = .four()).value');
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expect(instanceRef.valueAsString, '4');
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await service.resume(isolateId);
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});
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final isolate = await service.getIsolate(isolateId);
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await service.evaluate(
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isolateId,
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isolate.rootLib!.id!,
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'testDotShorthands()',
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);
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await bp;
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});
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test('single-stepping', () async {
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final bp = onBreakpoint('testDotShorthands', (event) async {
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final scriptBasename = basename(mainScript.uri!);
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const lineA = 116;
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const lineB = 118;
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const lineC = 119;
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const lineD = 120;
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const lineE = 127;
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const lineF = 129;
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const lineG = 131;
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const lineH = 132;
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const lineA = 9;
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const lineB = 11;
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const lineC = 12;
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const lineD = 13;
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const lineE = 20;
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const lineF = 22;
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const lineG = 24;
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const lineH = 25;
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final expected = [
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'$scriptBasename:$lineE:3', // on 'c'
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// TODO(2638): Investigate why this conditional exclusion is needed.
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if (provider.ddcModuleFormat == ModuleFormat.ddc)
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'$scriptBasename:$lineB:20', // on '2'
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'$scriptBasename:$lineB:15', // on 'C'
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'$scriptBasename:$lineA:10', // on 'v' of 'value'
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'$scriptBasename:$lineA:16', // on ';'
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'$scriptBasename:$lineB:20', // on '2'
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'$scriptBasename:$lineF:3', // on 'c'
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'$scriptBasename:$lineC:25', // on 'C'
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'$scriptBasename:$lineA:10', // on 'v' of 'value'
@@ -119,11 +132,20 @@ void runTests({
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await testInspector.runStepIntoThroughProgramRecordingStops(
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isolateId,
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stops,
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provider.ddcModuleFormat == ModuleFormat.ddc ? 13 : 12,
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expected.length,
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);
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expect(stops, expected);
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await service.resume(isolateId);
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});
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final isolate = await service.getIsolate(isolateId);
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await service.evaluate(
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isolateId,
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isolate.rootLib!.id!,
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'testDotShorthands()',
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);
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await bp;
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});
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});
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}

‎fixtures/_experiment/web/main.dart‎

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@@ -6,9 +6,10 @@
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import 'dart:async';
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import 'dart:core';
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// TODO: https://github.com/dart-lang/webdev/issues/2508
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// ignore: deprecated_member_use
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import 'dart:html';
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import 'dart:js_interop';
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@JS('document.body.append')
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external void append(String text);
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void main() {
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// for evaluation
@@ -26,11 +27,9 @@ void main() {
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testPattern2();
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print('Classes');
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testClass();
29-
print('Dot shorthands');
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testDotShorthands();
3130
});
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document.body!.appendText('Program is running!');
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append('Program is running!');
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}
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void printSimpleLocalRecord() {
@@ -93,10 +92,7 @@ class GreeterClass {
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final String greeteeName;
9493
final bool useFrench;
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GreeterClass({
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this.greeteeName = 'Snoopy',
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this.useFrench = false,
99-
});
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GreeterClass({this.greeteeName = 'Snoopy', this.useFrench = false});
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void sayHello() {
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useFrench ? greetInFrench() : greetInEnglish();
@@ -110,24 +106,3 @@ class GreeterClass {
110106
print('Bonjour $greeteeName');
111107
}
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}
113-
114-
class C {
115-
int value;
116-
C(this.value); // lineA
117-
118-
static C two = C(2); // lineB
119-
static C get three => C(3); // lineC
120-
static C four() => C(4); // lineD
121-
}
122-
123-
void testDotShorthands() {
124-
C c = C(1);
125-
print('breakpoint'); // Breakpoint: testDotShorthands
126-
// ignore: experiment_not_enabled
127-
c = .two; // lineE
128-
// ignore: experiment_not_enabled
129-
c = .three; // lineF
130-
// ignore: experiment_not_enabled
131-
c = .four(); // lineG
132-
print(c.value); // lineH
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}

‎fixtures/_test_dot_shorthands/pubspec.yaml‎

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@@ -0,0 +1,12 @@
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name: _test_dot_shorthands
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version: 1.0.0
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description: >-
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A fake package used for testing dot shorthands.
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publish_to: none
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7+
environment:
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sdk: ^3.9.0
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10+
dev_dependencies:
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build_runner: ^2.5.0
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build_web_compilers: ^4.0.4

‎fixtures/_test_dot_shorthands/web/index.html‎

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@@ -0,0 +1,7 @@
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<html>
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<head>
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<script defer src="main.dart.js"></script>
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</head>
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</html>

‎fixtures/_test_dot_shorthands/web/main.dart‎

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@@ -0,0 +1,28 @@
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// Copyright (c) 2025, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
3+
// BSD-style license that can be found in the LICENSE file.
4+
5+
// @dart = 3.9
6+
7+
class C {
8+
int value;
9+
C(this.value); // lineA
10+
11+
static C two = C(2); // lineB
12+
static C get three => C(3); // lineC
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static C four() => C(4); // lineD
14+
}
15+
16+
void testDotShorthands() {
17+
C c = C(1);
18+
print('breakpoint'); // Breakpoint: testDotShorthands
19+
// ignore: experiment_not_enabled
20+
c = .two; // lineE
21+
// ignore: experiment_not_enabled
22+
c = .three; // lineF
23+
// ignore: experiment_not_enabled
24+
c = .four(); // lineG
25+
print(c.value); // lineH
26+
}
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28+
void main() {}

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