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// Copyright 2018 The Chromium Authors. 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:async';
import 'package:file/file.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/platform.dart';
import 'package:vm_service_client/vm_service_client.dart';
import '../src/common.dart';
import 'test_data/basic_project.dart';
import 'test_driver.dart';
void main() {
group('expression evaluation', () {
Directory tempDir;
final BasicProject _project = BasicProject();
FlutterTestDriver _flutter;
setUp(() async {
tempDir = fs.systemTempDirectory.createTempSync('flutter_expression_test.');
await _project.setUpIn(tempDir);
_flutter = FlutterTestDriver(tempDir);
});
tearDown(() async {
await _flutter.stop();
tryToDelete(tempDir);
});
Future<VMIsolate> breakInBuildMethod(FlutterTestDriver flutter) async {
return _flutter.breakAt(
_project.buildMethodBreakpointFile,
_project.buildMethodBreakpointLine);
}
Future<VMIsolate> breakInTopLevelFunction(FlutterTestDriver flutter) async {
return _flutter.breakAt(
_project.topLevelFunctionBreakpointFile,
_project.topLevelFunctionBreakpointLine);
}
Future<void> evaluateTrivialExpressions() async {
VMInstanceRef res;
res = await _flutter.evaluateExpression('"test"');
expect(res is VMStringInstanceRef && res.value == 'test', isTrue);
res = await _flutter.evaluateExpression('1');
expect(res is VMIntInstanceRef && res.value == 1, isTrue);
res = await _flutter.evaluateExpression('true');
expect(res is VMBoolInstanceRef && res.value == true, isTrue);
}
Future<void> evaluateComplexExpressions() async {
final VMInstanceRef res = await _flutter.evaluateExpression('new DateTime.now().year');
expect(res is VMIntInstanceRef && res.value == DateTime.now().year, isTrue);
}
Future<void> evaluateComplexReturningExpressions() async {
final DateTime now = DateTime.now();
final VMInstanceRef resp = await _flutter.evaluateExpression('new DateTime.now()');
expect(resp.klass.name, equals('DateTime'));
// Ensure we got a reasonable approximation. The more accurate we try to
// make this, the more likely it'll fail due to differences in the time
// in the remote VM and the local VM at the time the code runs.
final VMStringInstanceRef res = await resp.evaluate(r'"$year-$month-$day"');
expect(res.value,
equals('${now.year}-${now.month}-${now.day}'));
}
test('can evaluate trivial expressions in top level function', () async {
await _flutter.run(withDebugger: true);
await breakInTopLevelFunction(_flutter);
await evaluateTrivialExpressions();
});
test('can evaluate trivial expressions in build method', () async {
await _flutter.run(withDebugger: true);
await breakInBuildMethod(_flutter);
await evaluateTrivialExpressions();
});
test('can evaluate complex expressions in top level function', () async {
await _flutter.run(withDebugger: true);
await breakInTopLevelFunction(_flutter);
await evaluateComplexExpressions();
});
test('can evaluate complex expressions in build method', () async {
await _flutter.run(withDebugger: true);
await breakInBuildMethod(_flutter);
await evaluateComplexExpressions();
});
test('can evaluate expressions returning complex objects in top level function', () async {
await _flutter.run(withDebugger: true);
await breakInTopLevelFunction(_flutter);
await evaluateComplexReturningExpressions();
});
test('can evaluate expressions returning complex objects in build method', () async {
await _flutter.run(withDebugger: true);
await breakInBuildMethod(_flutter);
await evaluateComplexReturningExpressions();
});
// TODO(dantup): Unskip after flutter-tester is fixed on Windows:
// https://github.com/flutter/flutter/issues/17833.
// https://github.com/flutter/flutter/issues/21348.
}, timeout: const Timeout.factor(6), skip: platform.isWindows);
}