Tests for File[System]State.

pkg/analyzer/test/src/dart/analysis/file_state_test.dart

+// Copyright (c) 2016, 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:typed_data';
+
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/source/package_map_resolver.dart';
+import 'package:analyzer/src/dart/analysis/byte_store.dart';
+import 'package:analyzer/src/dart/analysis/driver.dart' show PerformanceLog;
+import 'package:analyzer/src/dart/analysis/file_state.dart';
+import 'package:analyzer/src/generated/engine.dart'
+    show AnalysisOptions, AnalysisOptionsImpl;
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/util/fast_uri.dart';
+import 'package:convert/convert.dart';
+import 'package:crypto/crypto.dart';
+import 'package:test/test.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
+
+import '../../context/mock_sdk.dart';
+
+main() {
+  defineReflectiveSuite(() {
+    defineReflectiveTests(FileSystemStateTest);
+  });
+}
+
+@reflectiveTest
+class FileSystemStateTest {
+  static final MockSdk sdk = new MockSdk();
+
+  final MemoryResourceProvider provider = new MemoryResourceProvider();
+  final ByteStore byteStore = new MemoryByteStore();
+  final FileContentOverlay contentOverlay = new FileContentOverlay();
+
+  final StringBuffer logBuffer = new StringBuffer();
+  PerformanceLog logger;
+
+  FileSystemState fileSystemState;
+
+  void setUp() {
+    logger = new PerformanceLog(logBuffer);
+    SourceFactory sourceFactory = new SourceFactory([
+      new DartUriResolver(sdk),
+      new PackageMapUriResolver(provider, <String, List<Folder>>{
+        'aaa': [provider.getFolder(_p('/aaa/lib'))],
+        'bbb': [provider.getFolder(_p('/bbb/lib'))],
+      }),
+      new ResourceUriResolver(provider)
+    ], null, provider);
+    AnalysisOptions analysisOptions = new AnalysisOptionsImpl()
+      ..strongMode = true;
+    fileSystemState = new FileSystemState(logger, byteStore, contentOverlay,
+        provider, sourceFactory, analysisOptions, new Uint32List(0));
+  }
+
+  test_getFileForPath_doesNotExist() {
+    String path = _p('/aaa/lib/a.dart');
+    FileState file = fileSystemState.getFileForPath(path);
+    expect(file.path, path);
+    expect(file.uri, FastUri.parse('package:aaa/a.dart'));
+    expect(file.content, '');
+    expect(file.contentHash, _md5(''));
+    expect(file.importedFiles, isEmpty);
+    expect(file.exportedFiles, isEmpty);
+    expect(file.partedFiles, isEmpty);
+    expect(file.dependencies, isEmpty);
+    expect(file.isPart, isFalse);
+    expect(file.library, isNull);
+    expect(file.unlinked, isNotNull);
+    expect(file.unlinked.classes, isEmpty);
+  }
+
+  test_getFileForPath_library() {
+    String a1 = _p('/aaa/lib/a1.dart');
+    String a2 = _p('/aaa/lib/a2.dart');
+    String a3 = _p('/aaa/lib/a3.dart');
+    String a4 = _p('/aaa/lib/a4.dart');
+    String b1 = _p('/bbb/lib/b1.dart');
+    String b2 = _p('/bbb/lib/b2.dart');
+    String content_a1 = r'''
+import 'package:aaa/a2.dart';
+import 'package:bbb/b1.dart';
+export 'package:bbb/b2.dart';
+export 'package:aaa/a3.dart';
+part 'a4.dart';
+
+class A1 {}
+''';
+    provider.newFile(a1, content_a1);
+
+    FileState file = fileSystemState.getFileForPath(a1);
+    expect(file.path, a1);
+    expect(file.content, content_a1);
+    expect(file.contentHash, _md5(content_a1));
+
+    expect(file.isPart, isFalse);
+    expect(file.library, isNull);
+    expect(file.unlinked, isNotNull);
+    expect(file.unlinked.classes, hasLength(1));
+    expect(file.unlinked.classes[0].name, 'A1');
+
+    expect(file.importedFiles, hasLength(2));
+    expect(file.importedFiles[0].path, a2);
+    expect(file.importedFiles[0].uri, FastUri.parse('package:aaa/a2.dart'));
+    expect(file.importedFiles[0].source, isNotNull);
+    expect(file.importedFiles[1].path, b1);
+    expect(file.importedFiles[1].uri, FastUri.parse('package:bbb/b1.dart'));
+    expect(file.importedFiles[1].source, isNotNull);
+
+    expect(file.exportedFiles, hasLength(2));
+    expect(file.exportedFiles[0].path, b2);
+    expect(file.exportedFiles[0].uri, FastUri.parse('package:bbb/b2.dart'));
+    expect(file.exportedFiles[0].source, isNotNull);
+    expect(file.exportedFiles[1].path, a3);
+    expect(file.exportedFiles[1].uri, FastUri.parse('package:aaa/a3.dart'));
+    expect(file.exportedFiles[1].source, isNotNull);
+
+    expect(file.partedFiles, hasLength(1));
+    expect(file.partedFiles[0].path, a4);
+    expect(file.partedFiles[0].uri, FastUri.parse('package:aaa/a4.dart'));
+
+    expect(file.dependencies, hasLength(5));
+
+    expect(fileSystemState.getFilesForPath(a1), [file]);
+  }
+
+  test_getFileForPath_part() {
+    String a1 = _p('/aaa/lib/a1.dart');
+    String a2 = _p('/aaa/lib/a2.dart');
+    provider.newFile(
+        a1,
+        r'''
+library a1;
+part 'a2.dart';
+''');
+    provider.newFile(
+        a2,
+        r'''
+part of a1;
+class A2 {}
+''');
+
+    FileState file_a2 = fileSystemState.getFileForPath(a2);
+    expect(file_a2.path, a2);
+    expect(file_a2.uri, FastUri.parse('package:aaa/a2.dart'));
+
+    expect(file_a2.unlinked, isNotNull);
+    expect(file_a2.unlinked.classes, hasLength(1));
+    expect(file_a2.unlinked.classes[0].name, 'A2');
+
+    expect(file_a2.importedFiles, isEmpty);
+    expect(file_a2.exportedFiles, isEmpty);
+    expect(file_a2.partedFiles, isEmpty);
+    expect(file_a2.dependencies, isEmpty);
+
+    // The library is not known yet.
+    expect(file_a2.isPart, isTrue);
+    expect(file_a2.library, isNull);
+
+    // Ask for the library.
+    FileState file_a1 = fileSystemState.getFileForPath(a1);
+    expect(file_a1.partedFiles, hasLength(1));
+    expect(file_a1.partedFiles[0], same(file_a2));
+    expect(file_a1.dependencies, unorderedEquals([file_a2]));
+
+    // Now the part knows its library.
+    expect(file_a2.library, same(file_a1));
+
+    // Now update the library, and refresh its file.
+    // The 'a2.dart' is not referenced anymore.
+    // So the part file does not have the library anymore.
+    provider.newFile(
+        a1,
+        r'''
+library a1;
+part 'not-a2.dart';
+''');
+    file_a1.refresh();
+    expect(file_a2.library, isNull);
+  }
+
+  test_getFileForPath_samePath() {
+    String path = _p('/aaa/lib/a.dart');
+    FileState file1 = fileSystemState.getFileForPath(path);
+    FileState file2 = fileSystemState.getFileForPath(path);
+    expect(file2, same(file1));
+  }
+
+  test_getFileForUri_packageVsFileUri() {
+    String path = _p('/aaa/lib/a.dart');
+    var packageUri = FastUri.parse('package:aaa/a.dart');
+    var fileUri = provider.pathContext.toUri(path);
+
+    // The files with `package:` and `file:` URIs are different.
+    FileState filePackageUri = fileSystemState.getFileForUri(packageUri);
+    FileState fileFileUri = fileSystemState.getFileForUri(fileUri);
+    expect(filePackageUri, isNot(same(fileFileUri)));
+
+    expect(filePackageUri.path, path);
+    expect(filePackageUri.uri, packageUri);
+
+    expect(fileFileUri.path, path);
+    expect(fileFileUri.uri, fileUri);
+
+    // The file with the `package:` style URI is canonical, and is the first.
+    var files = fileSystemState.getFilesForPath(path);
+    expect(files, [filePackageUri, fileFileUri]);
+  }
+
+  test_refresh_differentApiSignature() {
+    String path = _p('/aaa/lib/a.dart');
+    provider.newFile(
+        path,
+        r'''
+class C {
+  foo() {}
+}
+''');
+    FileState file = fileSystemState.getFileForPath(path);
+    List<int> signature = file.apiSignature;
+
+    // Update the resource and refresh the file state.
+    provider.newFile(
+        path,
+        r'''
+class C {
+  bar() {}
+}
+''');
+    bool apiSignatureChanged = file.refresh();
+    expect(apiSignatureChanged, isTrue);
+
+    expect(file.apiSignature, isNot(signature));
+  }
+
+  test_refresh_sameApiSignature() {
+    String path = _p('/aaa/lib/a.dart');
+    provider.newFile(
+        path,
+        r'''
+class C {
+  foo() {
+    print(111);
+  }
+}
+''');
+    FileState file = fileSystemState.getFileForPath(path);
+    List<int> signature = file.apiSignature;
+
+    // Update the resource and refresh the file state.
+    provider.newFile(
+        path,
+        r'''
+class C {
+  foo() {
+    print(222);
+  }
+}
+''');
+    bool apiSignatureChanged = file.refresh();
+    expect(apiSignatureChanged, isFalse);
+
+    expect(file.apiSignature, signature);
+  }
+
+  String _p(String path) => provider.convertPath(path);
+
+  static String _md5(String content) {
+    return hex.encode(md5.convert(UTF8.encode(content)).bytes);
+  }
+}