blob: b567137ea6ec3a9beb3737986b1bacbeb8d87add [file] [log] [blame]
// Copyright (c) 2018, 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.
// @dart = 2.7
// Test that `length` access in JSArray.indexOf is encoding using `.length` and
// not `.get$length()`.
import 'package:async_helper/async_helper.dart';
import 'package:compiler/src/compiler.dart';
import 'package:compiler/src/commandline_options.dart';
import 'package:compiler/src/elements/entities.dart';
import 'package:compiler/src/elements/names.dart';
import 'package:compiler/src/world.dart';
import 'package:compiler/src/js_emitter/model.dart';
import 'package:compiler/src/js_model/js_strategy.dart';
import 'package:compiler/src/js/js.dart' as js;
import 'package:compiler/src/universe/selector.dart';
import 'package:expect/expect.dart';
import '../helpers/memory_compiler.dart';
import '../helpers/element_lookup.dart';
import '../helpers/program_lookup.dart';
const String source = '''
import 'package:expect/expect.dart';
@pragma('dart2js:noInline')
test(o, a) => o.indexOf(a);
main() {
test([1, 2, 3], 2);
test(['1', '2', '3'], '2');
}
''';
main() {
asyncTest(() async {
print('--test from kernel (strong mode)----------------------------------');
await runTest([]);
print('--test from kernel (strong mode, omit-implicit-checks)------------');
await runTest([Flags.omitImplicitChecks]);
});
}
runTest(List<String> options) async {
CompilationResult result = await runCompiler(
memorySourceFiles: {'main.dart': source}, options: options);
Expect.isTrue(result.isSuccess);
Compiler compiler = result.compiler;
JsBackendStrategy backendStrategy = compiler.backendStrategy;
JClosedWorld closedWorld = compiler.backendClosedWorldForTesting;
MemberEntity jsArrayIndexOf =
findClassMember(closedWorld, 'JSArray', 'indexOf');
ProgramLookup programLookup = new ProgramLookup(backendStrategy);
Selector getLengthSelector = new Selector.getter(const PublicName('length'));
js.Name getLengthName =
backendStrategy.namerForTesting.invocationName(getLengthSelector);
Method method = programLookup.getMethod(jsArrayIndexOf);
int lengthCount = 0;
forEachNode(method.code, onCall: (js.Call node) {
js.Node target = node.target;
Expect.isFalse(
target is js.PropertyAccess && target.selector == getLengthName,
"Unexpected .get\$length access ${js.nodeToString(node)} in\n"
"${js.nodeToString(method.code, pretty: true)}");
}, onPropertyAccess: (js.PropertyAccess node) {
js.Node selector = node.selector;
if (selector is js.LiteralString && selector.value == 'length') {
lengthCount++;
}
});
Expect.equals(
2,
lengthCount,
"Unexpected .length access in\n"
"${js.nodeToString(method.code, pretty: true)}");
}