Adding package:code_transformers for unifying common transformers code

pkg/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 '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';
+
+main() {
+  useCompactVMConfiguration();
+
+  var entryPoint = new AssetId('a', 'web/main.dart');
+  var transformer = new ResolverTransformer(dartSdkDirectory,
+      (asset) => asset.id == entryPoint);
+
+  var phases = [[transformer]];
+
+  group('Resolver', () {
+
+    test('should handle empty files', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            var source = resolver.sources[entryPoint];
+            expect(source.modificationStamp, 1);
+
+            var lib = resolver.entryLibrary;
+            expect(lib, isNotNull);
+            expect(lib.entryPoint, isNull);
+          });
+    });
+
+    test('should update when sources change', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': ''' main() {} ''',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            var source = resolver.sources[entryPoint];
+            expect(source.modificationStamp, 2);
+
+            var lib = resolver.entryLibrary;
+            expect(lib, isNotNull);
+            expect(lib.entryPoint, isNotNull);
+          });
+    });
+
+    test('should follow imports', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import 'a.dart';
+
+              main() {
+              } ''',
+            'a|web/a.dart': '''
+              library a;
+              ''',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            var lib = resolver.entryLibrary;
+            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 applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import 'a.dart';
+
+              main() {
+              } ''',
+            'a|web/a.dart': '''
+              library a;
+              class Foo {}
+              ''',
+          }).then((_) {
+            var lib = transformer.getResolver(entryPoint).entryLibrary;
+            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 applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import 'package:b/b.dart';
+
+              main() {
+              } ''',
+            'b|lib/b.dart': '''
+              library b;
+              ''',
+          }).then((_) {
+            var lib = transformer.getResolver(entryPoint).entryLibrary;
+            expect(lib.importedLibraries.length, 2);
+            var libB = lib.importedLibraries.where((l) => l.name == 'b').single;
+            expect(libB.getType('Foo'), isNull);
+          });
+    });
+
+    test('should update on changed package imports', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import 'package:b/b.dart';
+
+              main() {
+              } ''',
+            'b|lib/b.dart': '''
+              library b;
+              class Bar {}
+              ''',
+          }).then((_) {
+            var lib = transformer.getResolver(entryPoint).entryLibrary;
+            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 applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import 'package:b/b.dart';
+
+              main() {
+              } ''',
+          },
+          messages: [
+            'error: Unable to find asset for "package:b/b.dart"',
+            'error: Unable to find asset for "package:b/b.dart"',
+          ]).then((_) {
+            var lib = transformer.getResolver(entryPoint).entryLibrary;
+            expect(lib.importedLibraries.length, 1);
+          });
+    });
+
+    test('should fail on absolute URIs', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              import '/b.dart';
+
+              main() {
+              } ''',
+          },
+          messages: [
+            // First from the AST walker
+            'error: absolute paths not allowed: "/b.dart" (main.dart 0 14)',
+            // Then two from the resolver.
+            'error: absolute paths not allowed: "/b.dart"',
+            'error: absolute paths not allowed: "/b.dart"',
+          ]).then((_) {
+            var lib = transformer.getResolver(entryPoint).entryLibrary;
+            expect(lib.importedLibraries.length, 1);
+          });
+    });
+
+    test('should list all libraries', () {
+      return applyTransformers(phases,
+          inputs: {
+            'a|web/main.dart': '''
+              library a.main;
+              import 'package:a/a.dart';
+              import 'package:a/b.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;'
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            var libs = resolver.libraries.where((l) => !l.isInSdk);
+            expect(libs.map((l) => l.name), unorderedEquals([
+              'a.main',
+              'a.a',
+              'a.b',
+              'a.c',
+            ]));
+          });
+    });
+
+    test('should resolve types and library uris', () {
+      return applyTransformers(phases,
+          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{}
+                ''',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+
+            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 applyTransformers(phases,
+          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{}''',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            var engine = resolver.getType('Engine');
+            var uri = resolver.getImportUri(engine.library);
+            expect(uri.toString(), 'package:a/b.dart');
+          }).then((_) {
+            return applyTransformers(phases,
+              inputs: {
+                'a|web/main.dart': '''import 'package:a/a.dart';''',
+                'a|lib/a.dart': '''lib a;\n class Engine{}'''
+              });
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+            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 applyTransformers(phases,
+          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'; ''',
+          }).then((_) {
+            var resolver = transformer.getResolver(entryPoint);
+
+            var libs = resolver.libraries.map((lib) => lib.name);
+            expect(libs.contains('a'), isTrue);
+            expect(libs.contains('b'), isTrue);
+          });
+    });
+  });
+}