Konstantin Shcheglov
f0a07ac120
Change-Id: I92a002d69a10b83b9600455156a43c1592439477 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/245420 Reviewed-by: Samuel Rawlins <srawlins@google.com> Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
104 lines
3.4 KiB
Dart
104 lines
3.4 KiB
Dart
// Copyright (c) 2019, 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
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:io';
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import 'package:_fe_analyzer_shared/src/testing/id.dart' show ActualData, Id;
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import 'package:_fe_analyzer_shared/src/testing/id_testing.dart';
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import 'package:analyzer/dart/ast/ast.dart';
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import 'package:analyzer/dart/element/element.dart';
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import 'package:analyzer/dart/element/type.dart';
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import 'package:analyzer/dart/element/type_system.dart';
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import 'package:analyzer/src/dart/analysis/testing_data.dart';
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import 'package:analyzer/src/dart/ast/extensions.dart';
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import 'package:analyzer/src/util/ast_data_extractor.dart';
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import '../util/id_testing_helper.dart';
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main(List<String> args) async {
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Directory dataDir = Directory.fromUri(Platform.script.resolve(
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'../../../_fe_analyzer_shared/test/flow_analysis/nullability/data'));
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return runTests<String>(dataDir,
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args: args,
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createUriForFileName: createUriForFileName,
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onFailure: onFailure,
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runTest: runTestFor(
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const _NullabilityDataComputer(), [analyzerDefaultConfig]));
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}
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class _NullabilityDataComputer extends DataComputer<String> {
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const _NullabilityDataComputer();
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@override
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DataInterpreter<String> get dataValidator =>
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const _NullabilityDataInterpreter();
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@override
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void computeUnitData(TestingData testingData, CompilationUnit unit,
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Map<Id, ActualData<String>> actualMap) {
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var unitElement = unit.declaredElement!;
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_NullabilityDataExtractor(
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unitElement.source.uri, actualMap, unitElement.library.typeSystem)
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.run(unit);
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}
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}
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class _NullabilityDataExtractor extends AstDataExtractor<String> {
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final TypeSystem _typeSystem;
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_NullabilityDataExtractor(super.uri, super.actualMap, this._typeSystem);
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@override
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String? computeNodeValue(Id id, AstNode node) {
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if (node is SimpleIdentifier &&
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node.inGetterContext() &&
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!node.inDeclarationContext()) {
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var element = node.staticElement;
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if (element is LocalVariableElement || element is ParameterElement) {
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var promotedType = _readType(node);
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var declaredType = (element as VariableElement).type;
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var isPromoted = promotedType != declaredType;
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if (isPromoted &&
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_typeSystem.isPotentiallyNullable(declaredType) &&
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!_typeSystem.isPotentiallyNullable(promotedType)) {
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return 'nonNullable';
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}
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}
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}
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return null;
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}
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static DartType _readType(SimpleIdentifier node) {
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var parent = node.parent;
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if (parent is AssignmentExpression && parent.leftHandSide == node) {
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return parent.readType!;
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} else if (parent is PostfixExpression) {
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return parent.readType ?? node.typeOrThrow;
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} else if (parent is PrefixExpression) {
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return parent.readType ?? node.typeOrThrow;
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} else {
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return node.typeOrThrow;
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}
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}
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}
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class _NullabilityDataInterpreter implements DataInterpreter<String> {
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const _NullabilityDataInterpreter();
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@override
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String getText(String actualData, [String? indentation]) => actualData;
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@override
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String? isAsExpected(String actualData, String? expectedData) {
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if (actualData == expectedData) {
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return null;
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} else {
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return 'Expected $expectedData, got $actualData';
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}
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}
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@override
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bool isEmpty(String actualData) => actualData.isEmpty;
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}
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