/
resolver_test.dart
775 lines (700 loc) · 25.8 KB
/
resolver_test.dart
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// 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.
import 'dart:convert';
import 'dart:io' show Platform;
import 'dart:isolate';
import 'package:analyzer/dart/analysis/results.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer/dart/element/element.dart';
import 'package:build/build.dart';
import 'package:build/experiments.dart';
import 'package:build_resolvers/src/analysis_driver.dart';
import 'package:build_resolvers/src/resolver.dart';
import 'package:build_test/build_test.dart';
import 'package:logging/logging.dart';
import 'package:package_config/package_config.dart';
import 'package:pub_semver/pub_semver.dart';
import 'package:test/test.dart';
void main() {
final entryPoint = AssetId('a', 'web/main.dart');
group('Resolver', () {
test('should handle initial files', () {
return resolveSources({
'a|web/main.dart': ' main() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib, isNotNull);
}, resolvers: AnalyzerResolvers());
});
test('should follow imports', () {
return resolveSources({
'a|web/main.dart': '''
import 'a.dart';
main() {
} ''',
'a|web/a.dart': '''
library a;
''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.importedLibraries.length, 2);
var libA = lib.importedLibraries.where((l) => l.name == 'a').single;
expect(libA.getType('Foo'), isNull);
}, resolvers: AnalyzerResolvers());
});
test('should follow package imports', () {
return resolveSources({
'a|web/main.dart': '''
import 'package:b/b.dart';
main() {
} ''',
'b|lib/b.dart': '''
library b;
''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.importedLibraries.length, 2);
var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
expect(libB.getType('Foo'), isNull);
}, resolvers: AnalyzerResolvers());
});
test('should still crawl transitively after a call to isLibrary', () {
return resolveSources({
'a|web/main.dart': '''
import 'package:b/b.dart';
main() {
} ''',
'b|lib/b.dart': '''
library b;
''',
}, (resolver) async {
await resolver.isLibrary(entryPoint);
var libs = await resolver.libraries.toList();
expect(libs, contains(predicate((LibraryElement l) => l.name == 'b')));
}, resolvers: AnalyzerResolvers());
});
test('should still crawl transitively after a call to compilationUnitFor',
() {
return resolveSources({
'a|web/main.dart': '''
import 'package:b/b.dart';
main() {
} ''',
'b|lib/b.dart': '''
library b;
''',
}, (resolver) async {
await resolver.compilationUnitFor(entryPoint);
var libs = await resolver.libraries.toList();
expect(libs, contains(predicate((LibraryElement l) => l.name == 'b')));
}, resolvers: AnalyzerResolvers());
});
group('language versioning', () {
test('gives a correct languageVersion based on comments', () async {
await resolveSources({
'a|web/main.dart': '// @dart=2.1\n\nmain() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.languageVersion.effective.major, 2);
expect(lib.languageVersion.effective.minor, 1);
}, resolvers: AnalyzerResolvers());
});
test('defaults to the current isolate package config', () async {
await resolveSources({
'a|web/main.dart': 'main() {}',
}, (resolver) async {
var buildResolversId =
AssetId('build_resolvers', 'lib/build_resolvers.dart');
var lib = await resolver.libraryFor(buildResolversId);
var currentPackageConfig =
await loadPackageConfigUri((await Isolate.packageConfig)!);
var expectedVersion =
currentPackageConfig['build_resolvers']!.languageVersion!;
expect(lib.languageVersion.effective.major, expectedVersion.major);
expect(lib.languageVersion.effective.minor, expectedVersion.minor);
}, resolvers: AnalyzerResolvers());
});
test('uses the overridden package config if provided', () async {
// An arbitrary past version that could never be selected for this
// package.
var customVersion = LanguageVersion(2, 1);
var customPackageConfig = PackageConfig([
Package('a', Uri.file('/fake/a/'),
packageUriRoot: Uri.file('/fake/a/lib/'),
languageVersion: customVersion)
]);
await resolveSources({
'a|web/main.dart': 'main() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.languageVersion.effective.major, customVersion.major);
expect(lib.languageVersion.effective.minor, customVersion.minor);
}, resolvers: AnalyzerResolvers(null, null, customPackageConfig));
});
test('gives the current language version if not provided', () async {
var customPackageConfig = PackageConfig([
Package('a', Uri.file('/fake/a/'),
packageUriRoot: Uri.file('/fake/a/lib/'), languageVersion: null),
]);
await resolveSources({
'a|web/main.dart': 'main() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.languageVersion.effective.major, sdkLanguageVersion.major);
expect(lib.languageVersion.effective.minor, sdkLanguageVersion.minor);
}, resolvers: AnalyzerResolvers(null, null, customPackageConfig));
});
test('allows a version of analyzer compatibile with the current sdk',
() async {
var originalLevel = Logger.root.level;
Logger.root.level = Level.WARNING;
var listener = Logger.root.onRecord.listen((record) {
fail('Got an unexpected warning during analysis:\n\n$record');
});
addTearDown(() {
Logger.root.level = originalLevel;
listener.cancel();
});
await resolveSources({
'a|web/main.dart': 'main() {}',
}, (resolver) async {
await resolver.libraryFor(entryPoint);
}, resolvers: AnalyzerResolvers());
}, skip: _skipOnPreRelease);
});
group('assets that aren\'t a transitive import of input', () {
Future _runWith(Future Function(Resolver) test) {
return resolveSources({
'a|web/main.dart': '''
main() {}
''',
'a|lib/other.dart': '''
library other;
'''
}, test, resolvers: AnalyzerResolvers());
}
final otherId = AssetId.parse('a|lib/other.dart');
test('can be resolved', () {
return _runWith((resolver) async {
final main = await resolver.libraryFor(entryPoint);
expect(main, isNotNull);
final other = await resolver.libraryFor(otherId);
expect(other.name, 'other');
});
});
test('are included in library stream', () {
return _runWith((resolver) async {
await expectLater(
resolver.libraries.map((l) => l.name), neverEmits('other'));
await resolver.libraryFor(otherId);
await expectLater(
resolver.libraries.map((l) => l.name), emitsThrough('other'));
});
});
test('can be found by name', () {
return _runWith((resolver) async {
await resolver.libraryFor(otherId);
await expectLater(
resolver.findLibraryByName('other'), completion(isNotNull));
});
});
});
test('handles missing files', () {
return resolveSources({
'a|web/main.dart': '''
import 'package:b/missing.dart';
part 'missing.g.dart';
main() {
} ''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.parts2.length, 1);
expect(lib.parts2.whereType<DirectiveUriWithSource>(), isEmpty);
}, resolvers: AnalyzerResolvers());
});
test('handles discovering previously missing parts', () async {
var resolvers = AnalyzerResolvers();
await resolveSources({
'a|web/main.dart': '''
part 'main.g.dart';
class A implements B {}
''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
var clazz = lib.getType('A');
expect(clazz, isNotNull);
expect(clazz!.interfaces, isEmpty);
}, resolvers: resolvers);
await resolveSources({
'a|web/main.dart': '''
part 'main.g.dart';
class A implements B {}
''',
'a|web/main.g.dart': '''
part of 'main.dart';
class B {}
''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
var clazz = lib.getType('A');
expect(clazz, isNotNull);
expect(clazz!.interfaces, hasLength(1));
expect(clazz.interfaces.first.getDisplayString(withNullability: false),
'B');
}, resolvers: resolvers);
});
test('should list all libraries', () {
return resolveSources({
'a|web/main.dart': '''
library a.main;
import 'package:a/a.dart';
import 'package:a/b.dart';
export 'package:a/d.dart';
''',
'a|lib/a.dart': 'library a.a;\n import "package:a/c.dart";',
'a|lib/b.dart': 'library a.b;\n import "c.dart";',
'a|lib/c.dart': 'library a.c;',
'a|lib/d.dart': 'library a.d;'
}, (resolver) async {
var libs = await resolver.libraries.where((l) => !l.isInSdk).toList();
expect(
libs.map((l) => l.name),
unorderedEquals([
'a.main',
'a.a',
'a.b',
'a.c',
'a.d',
]));
}, resolvers: AnalyzerResolvers());
});
test('should resolve types and library uris', () {
return resolveSources({
'a|web/main.dart': '''
// dart and dart-ext uris should be ignored
import 'dart:core';
import 'dart-ext:some-ext';
// package: and relative uris should be available
import 'package:a/a.dart';
import 'package:a/b.dart';
import 'sub_dir/d.dart';
class Foo {}
''',
'a|lib/a.dart': 'library a.a;\n import "package:a/c.dart";',
'a|lib/b.dart': 'library a.b;\n import "c.dart";',
'a|lib/c.dart': '''
library a.c;
class Bar {}
''',
'a|web/sub_dir/d.dart': '''
library a.web.sub_dir.d;
class Baz{}
''',
}, (resolver) async {
var a = await resolver.findLibraryByName('a.a');
expect(a, isNotNull);
var main = await resolver.findLibraryByName('');
expect(main, isNotNull);
}, resolvers: AnalyzerResolvers());
});
test('resolves constants transitively', () {
return resolveSources({
'a|web/main.dart': '''
library web.main;
import 'package:a/dont_resolve.dart';
export 'package:a/dont_resolve.dart';
class Foo extends Bar {}
''',
'a|lib/dont_resolve.dart': '''
library a.dont_resolve;
const int annotation = 0;
@annotation
class Bar {}''',
}, (resolver) async {
var main = (await resolver.findLibraryByName('web.main'))!;
var meta = main.getType('Foo')!.supertype!.element.metadata[0];
expect(meta, isNotNull);
expect(meta.computeConstantValue()?.toIntValue(), 0);
}, resolvers: AnalyzerResolvers());
});
test('handles circular imports', () {
return resolveSources({
'a|web/main.dart': '''
library main;
import 'package:a/a.dart'; ''',
'a|lib/a.dart': '''
library a;
import 'package:a/b.dart'; ''',
'a|lib/b.dart': '''
library b;
import 'package:a/a.dart'; ''',
}, (resolver) async {
var libs = await resolver.libraries.map((lib) => lib.name).toList();
expect(libs.contains('a'), isTrue);
expect(libs.contains('b'), isTrue);
}, resolvers: AnalyzerResolvers());
});
test('assetIdForElement', () {
return resolveSources({
'a|lib/a.dart': '''
import 'b.dart';
main() {
SomeClass();
} ''',
'a|lib/b.dart': '''
class SomeClass {}
''',
}, (resolver) async {
var entry = await resolver.libraryFor(AssetId('a', 'lib/a.dart'));
var classDefinition = entry.importedLibraries
.map((l) => l.getType('SomeClass'))
.singleWhere((c) => c != null)!;
expect(await resolver.assetIdForElement(classDefinition),
AssetId('a', 'lib/b.dart'));
}, resolvers: AnalyzerResolvers());
});
test('assetIdForElement throws for ambiguous elements', () {
return resolveSources({
'a|lib/a.dart': '''
import 'b.dart';
import 'c.dart';
@SomeClass()
main() {}
''',
'a|lib/b.dart': '''
class SomeClass {}
''',
'a|lib/c.dart': '''
class SomeClass {}
''',
}, (resolver) async {
var entry = await resolver.libraryFor(AssetId('a', 'lib/a.dart'));
final element = entry.topLevelElements
.firstWhere((e) => e is FunctionElement && e.name == 'main')
.metadata
.single
.element!;
await expectLater(() => resolver.assetIdForElement(element),
throwsA(isA<UnresolvableAssetException>()));
}, resolvers: AnalyzerResolvers());
});
test('Respects withEnabledExperiments', () async {
Logger.root.level = Level.ALL;
Logger.root.onRecord.listen(print);
await withEnabledExperiments(
() => resolveSources({
'a|web/main.dart': '''
// @dart=${sdkLanguageVersion.major}.${sdkLanguageVersion.minor}
int? get x => 1;
''',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(lib.languageVersion.effective.major,
sdkLanguageVersion.major);
expect(lib.languageVersion.effective.minor,
sdkLanguageVersion.minor);
var errors = await lib.session.getErrors('/a/web/main.dart')
as ErrorsResult;
expect(errors.errors, isEmpty);
}, resolvers: AnalyzerResolvers()),
['non-nullable']);
}, skip: _skipOnPreRelease);
test('can get a new analysis session after resolving additional assets',
() async {
var resolvers = AnalyzerResolvers();
await resolveSources({
'a|web/main.dart': '',
'a|web/other.dart': '',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
expect(await resolver.isLibrary(AssetId('a', 'web/other.dart')), true);
var newLib =
await resolver.libraryFor(await resolver.assetIdForElement(lib));
expect(await newLib.session.getResolvedLibraryByElement(newLib),
isA<ResolvedLibraryResult>());
}, resolvers: resolvers);
});
group('syntax errors', () {
test('are reported', () {
return resolveSources({
'a|errors.dart': '''
library a_library;
void withSyntaxErrors() {
String x = ;
}
''',
}, (resolver) async {
await expectLater(
resolver.libraryFor(AssetId.parse('a|errors.dart')),
throwsA(isA<SyntaxErrorInAssetException>()),
);
await expectLater(
resolver.compilationUnitFor(AssetId.parse('a|errors.dart')),
throwsA(isA<SyntaxErrorInAssetException>()),
);
});
});
test('are reported for part files with errors', () {
return resolveSources({
'a|lib.dart': '''
library a_library;
part 'errors.dart';
part 'does_not_exist.dart';
''',
'a|errors.dart': '''
part of 'lib.dart';
void withSyntaxErrors() {
String x = ;
}
''',
}, (resolver) async {
await expectLater(
resolver.libraryFor(AssetId.parse('a|lib.dart')),
throwsA(
isA<SyntaxErrorInAssetException>()
.having((e) => e.syntaxErrors, 'syntaxErrors', hasLength(1)),
),
);
await expectLater(
resolver.compilationUnitFor(AssetId.parse('a|errors.dart')),
throwsA(
isA<SyntaxErrorInAssetException>()
.having((e) => e.syntaxErrors, 'syntaxErrors', hasLength(1)),
),
);
});
});
test('are not reported when disabled', () {
return resolveSources({
'a|errors.dart': '''
library a_library;
void withSyntaxErrors() {
String x = ;
}
''',
}, (resolver) async {
await expectLater(
resolver.libraryFor(AssetId.parse('a|errors.dart'),
allowSyntaxErrors: true),
completion(isNotNull),
);
await expectLater(
resolver.compilationUnitFor(AssetId.parse('a|errors.dart'),
allowSyntaxErrors: true),
completion(isNotNull),
);
});
});
test('are truncated if necessary', () {
return resolveSources({
'a|errors.dart': '''
library a_library;
void withSyntaxErrors() {
String x = ;
String x = ;
String x = ;
String x = ;
String x = ;
}
''',
}, (resolver) async {
var expectation = throwsA(
isA<SyntaxErrorInAssetException>().having(
(e) => e.toString(),
'toString()',
contains(RegExp(r'And \d more')),
),
);
await expectLater(
resolver.libraryFor(AssetId.parse('a|errors.dart')),
expectation,
);
await expectLater(
resolver.compilationUnitFor(AssetId.parse('a|errors.dart')),
expectation,
);
});
});
test('do not report semantic errors', () {
return resolveSources({
'a|errors.dart': '''
library a_library;
void withSemanticErrors() {
String x = withSemanticErrors();
String x = null;
}
''',
}, (resolver) async {
await expectLater(
resolver.libraryFor(AssetId.parse('a|errors.dart')),
completion(isNotNull),
);
await expectLater(
resolver.compilationUnitFor(AssetId.parse('a|errors.dart')),
completion(isNotNull),
);
});
});
});
});
test('throws when reading a part-of file', () {
return resolveSources(
{
'a|lib/a.dart': '''
part 'b.dart';
''',
'a|lib/b.dart': '''
part of 'a.dart';
'''
},
(resolver) async {
final assetId = AssetId.parse('a|lib/b.dart');
await expectLater(
() => resolver.libraryFor(assetId),
throwsA(const TypeMatcher<NonLibraryAssetException>()
.having((e) => e.assetId, 'assetId', equals(assetId))),
);
},
);
});
group('The ${isFlutter ? 'flutter' : 'dart'} sdk', () {
test('can${isFlutter ? '' : ' not'} resolve types from dart:ui', () async {
return resolveSources({
'a|lib/a.dart': '''
import 'dart:ui';
class MyClass {
final Color color;
MyClass(this.color);
} ''',
}, (resolver) async {
var entry = await resolver.libraryFor(AssetId('a', 'lib/a.dart'));
var classDefinition = entry.getType('MyClass')!;
var color = classDefinition.getField('color')!;
if (isFlutter) {
expect(color.type.element!.name, equals('Color'));
expect(color.type.element!.library!.name, equals('dart.ui'));
expect(
color.type.element!.library!.definingCompilationUnit.source.uri
.toString(),
equals('dart:ui'));
} else {
expect(color.type.element!.name, equals('dynamic'));
}
}, resolvers: AnalyzerResolvers());
});
});
test('generated part files are not considered libraries', () async {
var writer = InMemoryAssetWriter();
var reader = InMemoryAssetReader.shareAssetCache(writer.assets);
var input = AssetId('a', 'lib/input.dart');
writer.assets[input] = utf8.encode("part 'input.a.dart';");
var builder = TestBuilder(
buildExtensions: {
'.dart': ['.a.dart']
},
build: (buildStep, buildExtensions) async {
var isLibrary = await buildStep.resolver.isLibrary(buildStep.inputId);
if (buildStep.inputId == input) {
await buildStep.writeAsString(
buildStep.inputId
.changeExtension(buildExtensions['.dart']!.first),
"part of 'input.dart';");
expect(isLibrary, true);
} else {
expect(isLibrary, false,
reason:
'${buildStep.inputId} should not be considered a library');
}
});
var resolvers = AnalyzerResolvers();
await runBuilder(builder, [input], reader, writer, resolvers);
await runBuilder(
builder, [input.changeExtension('.a.dart')], reader, writer, resolvers);
});
test('missing files are not considered libraries', () async {
var writer = InMemoryAssetWriter();
var reader = InMemoryAssetReader.shareAssetCache(writer.assets);
var input = AssetId('a', 'lib/input.dart');
writer.assets[input] = utf8.encode('void doStuff() {}');
var builder = TestBuilder(
buildExtensions: {
'.dart': ['.a.dart']
},
build: expectAsync2((buildStep, _) async {
expect(
await buildStep.resolver.isLibrary(
buildStep.inputId.changeExtension('doesnotexist.dart')),
false);
}));
var resolvers = AnalyzerResolvers();
await runBuilder(builder, [input], reader, writer, resolvers);
});
test('assets with extensions other than `.dart` are not considered libraries',
() async {
var writer = InMemoryAssetWriter();
var reader = InMemoryAssetReader.shareAssetCache(writer.assets);
var input = AssetId('a', 'lib/input.dart');
writer.assets[input] = utf8.encode('void doStuff() {}');
var otherFile = AssetId('a', 'lib/input.notdart');
writer.assets[otherFile] = utf8.encode('Not a Dart file');
var builder = TestBuilder(
buildExtensions: {
'.dart': ['.a.dart']
},
build: expectAsync2((buildStep, _) async {
var other = buildStep.inputId.changeExtension('.notdart');
expect(await buildStep.canRead(other), true);
expect(await buildStep.resolver.isLibrary(other), false);
}));
var resolvers = AnalyzerResolvers();
await runBuilder(builder, [input], reader, writer, resolvers);
});
group('compilationUnitFor', () {
test('can parse a given input', () {
return resolveSources({
'a|web/main.dart': ' main() {}',
}, (resolver) async {
var unit = await resolver.compilationUnitFor(entryPoint);
expect(unit, isNotNull);
expect(unit.declarations.length, 1);
expect(
unit.declarations.first,
isA<FunctionDeclaration>()
.having((d) => d.name.name, 'main', 'main'));
}, resolvers: AnalyzerResolvers());
});
});
group('astNodeFor', () {
test('can return an unresolved ast', () {
return resolveSources({
'a|web/main.dart': ' main() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
var unit = await resolver.astNodeFor(lib.topLevelElements.first);
expect(unit, isA<FunctionDeclaration>());
expect(unit!.toSource(), 'main() {}');
expect((unit as FunctionDeclaration).declaredElement, isNull);
}, resolvers: AnalyzerResolvers());
});
test('can return an resolved ast', () {
return resolveSources({
'a|web/main.dart': 'main() {}',
}, (resolver) async {
var lib = await resolver.libraryFor(entryPoint);
var unit = await resolver.astNodeFor(lib.topLevelElements.first,
resolve: true);
expect(
unit,
isA<FunctionDeclaration>()
.having((fd) => fd.toSource(), 'toSource()', 'main() {}')
.having((fd) => fd.declaredElement, 'declaredElement', isNotNull),
);
}, resolvers: AnalyzerResolvers());
});
});
}
final _skipOnPreRelease =
Version.parse(Platform.version.split(' ').first).isPreRelease
? 'Skipped on prerelease sdks'
: null;