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packages/code_transformers/test/resolver_test.dart

+// Copyright (c) 2014, 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.
+
+library code_transformers.test.resolver_test;
+
+import 'dart:async';
+
+import 'package:barback/barback.dart';
+import 'package:code_transformers/resolver.dart';
+import 'package:code_transformers/tests.dart';
+import 'package:unittest/compact_vm_config.dart';
+import 'package:unittest/unittest.dart';
+
+import 'package:code_transformers/src/dart_sdk.dart' show mockSdkSources;
+
+main() {
+  useCompactVMConfiguration();
+  group('mock sdk', () {
+    resolverTests(new Resolvers.fromMock(mockSdkSources));
+  });
+
+  group('real sdk', () {
+    resolverTests(new Resolvers(testingDartSdkDirectory));
+  });
+}
+
+resolverTests(Resolvers resolvers) {
+  var entryPoint = new AssetId('a', 'web/main.dart');
+  Future validateResolver({Map<String, String> inputs, validator(Resolver),
+      List<String> messages: const []}) {
+    return applyTransformers(
+        [[new TestTransformer(resolvers, entryPoint, validator)]],
+        inputs: inputs, messages: messages);
+  }
+
+  group('Resolver', () {
+    test('should handle initial files', () {
+      return validateResolver(
+          inputs: {'a|web/main.dart': ' main() {}',}, validator: (resolver) {
+        var source = resolver.sources[entryPoint];
+        expect(source.modificationStamp, 1);
+
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib, isNotNull);
+      });
+    });
+
+    test('should update when sources change', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': ''' main() {
+                } ''',
+      }, validator: (resolver) {
+        var source = resolver.sources[entryPoint];
+        expect(source.modificationStamp, 2);
+
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib, isNotNull);
+        expect(lib.entryPoint, isNotNull);
+      });
+    });
+
+    test('should follow imports', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'a.dart';
+
+              main() {
+              } ''',
+        'a|web/a.dart': '''
+              library a;
+              ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 2);
+        var libA = lib.importedLibraries.where((l) => l.name == 'a').single;
+        expect(libA.getType('Foo'), isNull);
+      });
+    });
+
+    test('should update changed imports', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'a.dart';
+
+              main() {
+              } ''',
+        'a|web/a.dart': '''
+              library a;
+              class Foo {}
+              ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 2);
+        var libA = lib.importedLibraries.where((l) => l.name == 'a').single;
+        expect(libA.getType('Foo'), isNotNull);
+      });
+    });
+
+    test('should follow package imports', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'package:b/b.dart';
+
+              main() {
+              } ''',
+        'b|lib/b.dart': '''
+              library b;
+              ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 2);
+        var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
+        expect(libB.getType('Foo'), isNull);
+      });
+    });
+
+    test('handles missing files', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'package:b/missing.dart';
+
+              main() {
+              } ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 1);
+      });
+    });
+
+    test('should update on changed package imports', () {
+      // TODO(sigmund): remove modification below, see dartbug.com/22638
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'package:b/missing.dart';
+
+              main() {
+              } // modified, but we shouldn't need to! ''',
+        'b|lib/missing.dart': '''
+              library b;
+              class Bar {}
+              ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 2);
+        var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
+        expect(libB.getType('Bar'), isNotNull);
+      });
+    });
+
+    test('should handle deleted files', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'package:b/missing.dart';
+
+              main() {
+              } ''',
+      }, validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 1);
+      });
+    });
+
+    test('should fail on absolute URIs', () {
+      var warningPrefix = 'warning: absolute paths not allowed';
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import '/b.dart';
+
+              main() {
+              } ''',
+      }, messages: [
+        // First from the AST walker
+        '$warningPrefix: "/b.dart" (web/main.dart 0 14)',
+        '$warningPrefix: "/b.dart"',
+      ], validator: (resolver) {
+        var lib = resolver.getLibrary(entryPoint);
+        expect(lib.importedLibraries.length, 1);
+      });
+    });
+
+    test('should list all libraries', () {
+      return validateResolver(inputs: {
+        '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;'
+      }, validator: (resolver) {
+        var libs = resolver.libraries.where((l) => !l.isInSdk);
+        expect(libs.map((l) => l.name),
+            unorderedEquals(['a.main', 'a.a', 'a.b', 'a.c', 'a.d',]));
+      });
+    });
+
+    test('should resolve types and library uris', () {
+      return validateResolver(inputs: {
+        'a|web/main.dart': '''
+              import 'dart:core';
+              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{}
+                ''',
+      }, validator: (resolver) {
+        var a = resolver.getLibraryByName('a.a');
+        expect(a, isNotNull);
+        expect(resolver.getImportUri(a).toString(), 'package:a/a.dart');
+        expect(resolver.getLibraryByUri(Uri.parse('package:a/a.dart')), a);
+
+        var main = resolver.getLibraryByName('');
+        expect(main, isNotNull);
+        expect(resolver.getImportUri(main), isNull);
+
+        var fooType = resolver.getType('Foo');
+        expect(fooType, isNotNull);
+        expect(fooType.library, main);
+
+        var barType = resolver.getType('a.c.Bar');
+        expect(barType, isNotNull);
+        expect(resolver.getImportUri(barType.library).toString(),
+            'package:a/c.dart');
+        expect(
+            resolver.getSourceAssetId(barType), new AssetId('a', 'lib/c.dart'));
+
+        var bazType = resolver.getType('a.web.sub_dir.d.Baz');
+        expect(bazType, isNotNull);
+        expect(resolver.getImportUri(bazType.library), isNull);
+        expect(
+            resolver.getImportUri(bazType.library, from: entryPoint).toString(),
+            'sub_dir/d.dart');
+
+        var hashMap = resolver.getType('dart.collection.HashMap');
+        expect(resolver.getImportUri(hashMap.library).toString(),
+            'dart:collection');
+        expect(resolver.getLibraryByUri(Uri.parse('dart:collection')),
+            hashMap.library);
+      });
+    });
+
+    test('deleted files should be removed', () {
+      return validateResolver(
+          inputs: {
+        'a|web/main.dart': '''import 'package:a/a.dart';''',
+        'a|lib/a.dart': '''import 'package:a/b.dart';''',
+        'a|lib/b.dart': '''class Engine{}''',
+      },
+          validator: (resolver) {
+        var engine = resolver.getType('Engine');
+        var uri = resolver.getImportUri(engine.library);
+        expect(uri.toString(), 'package:a/b.dart');
+      }).then((_) {
+        return validateResolver(
+            inputs: {
+          'a|web/main.dart': '''import 'package:a/a.dart';''',
+          'a|lib/a.dart': '''lib a;\n class Engine{}'''
+        },
+            validator: (resolver) {
+          var engine = resolver.getType('Engine');
+          var uri = resolver.getImportUri(engine.library);
+          expect(uri.toString(), 'package:a/a.dart');
+
+          // Make sure that we haven't leaked any sources.
+          expect(resolver.sources.length, 2);
+        });
+      });
+    });
+
+    test('handles circular imports', () {
+      return validateResolver(inputs: {
+        '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'; ''',
+      }, validator: (resolver) {
+        var libs = resolver.libraries.map((lib) => lib.name);
+        expect(libs.contains('a'), isTrue);
+        expect(libs.contains('b'), isTrue);
+      });
+    });
+
+    test('handles parallel resolves', () {
+      return Future.wait([
+        validateResolver(inputs: {
+          'a|web/main.dart': '''
+                library foo;'''
+        }, validator: (resolver) {
+          expect(resolver.getLibrary(entryPoint).name, 'foo');
+        }),
+        validateResolver(inputs: {
+          'a|web/main.dart': '''
+                library bar;'''
+        }, validator: (resolver) {
+          expect(resolver.getLibrary(entryPoint).name, 'bar');
+        }),
+      ]);
+    });
+  });
+}
+
+class TestTransformer extends Transformer with ResolverTransformer {
+  final AssetId primary;
+  final Function validator;
+
+  TestTransformer(Resolvers resolvers, this.primary, this.validator) {
+    this.resolvers = resolvers;
+  }
+
+  // TODO(nweiz): This should just take an AssetId when barback <0.13.0 support
+  // is dropped.
+  Future<bool> isPrimary(idOrAsset) {
+    var id = idOrAsset is AssetId ? idOrAsset : idOrAsset.id;
+    return new Future.value(id == primary);
+  }
+
+  applyResolver(Transform transform, Resolver resolver) => validator(resolver);
+}