Implement a replacement for FileBasedSource (and _MemoryFileSource)

pkg/analyzer/test/src/source/source_resource_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.
+
+library analyzer.test.src.source.source_resource_test;
+
+import 'package:analyzer/file_system/file_system.dart';
+import 'package:analyzer/file_system/memory_file_system.dart';
+import 'package:analyzer/file_system/physical_file_system.dart';
+import 'package:analyzer/src/generated/java_core.dart';
+import 'package:analyzer/src/generated/java_engine_io.dart';
+import 'package:analyzer/src/generated/sdk.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/utilities_dart.dart';
+import 'package:analyzer/src/source/source_resource.dart';
+import 'package:unittest/unittest.dart';
+
+import '../../reflective_tests.dart';
+import '../../utils.dart';
+import '../context/mock_sdk.dart';
+
+main() {
+  initializeTestEnvironment();
+  runReflectiveTests(FileSourceTest);
+}
+
+@reflectiveTest
+class FileSourceTest {
+  MemoryResourceProvider resourceProvider = new MemoryResourceProvider();
+
+  void test_equals_false_differentFiles() {
+    File file1 = resourceProvider.getFile("/does/not/exist1.dart");
+    File file2 = resourceProvider.getFile("/does/not/exist2.dart");
+    FileSource source1 = new FileSource(file1);
+    FileSource source2 = new FileSource(file2);
+    expect(source1 == source2, isFalse);
+  }
+
+  void test_equals_false_null() {
+    File file = resourceProvider.getFile("/does/not/exist1.dart");
+    FileSource source1 = new FileSource(file);
+    expect(source1 == null, isFalse);
+  }
+
+  void test_equals_true() {
+    File file1 = resourceProvider.getFile("/does/not/exist.dart");
+    File file2 = resourceProvider.getFile("/does/not/exist.dart");
+    FileSource source1 = new FileSource(file1);
+    FileSource source2 = new FileSource(file2);
+    expect(source1 == source2, isTrue);
+  }
+
+  void test_fileReadMode() {
+    expect(FileSource.fileReadMode('a'), 'a');
+    expect(FileSource.fileReadMode('a\n'), 'a\n');
+    expect(FileSource.fileReadMode('ab'), 'ab');
+    expect(FileSource.fileReadMode('abc'), 'abc');
+    expect(FileSource.fileReadMode('a\nb'), 'a\nb');
+    expect(FileSource.fileReadMode('a\rb'), 'a\rb');
+    expect(FileSource.fileReadMode('a\r\nb'), 'a\r\nb');
+  }
+
+  void test_fileReadMode_changed() {
+    FileSource.fileReadMode = (String s) => s + 'xyz';
+    expect(FileSource.fileReadMode('a'), 'axyz');
+    expect(FileSource.fileReadMode('a\n'), 'a\nxyz');
+    expect(FileSource.fileReadMode('ab'), 'abxyz');
+    expect(FileSource.fileReadMode('abc'), 'abcxyz');
+    FileSource.fileReadMode = (String s) => s;
+  }
+
+  void test_fileReadMode_normalize_eol_always() {
+    FileSource.fileReadMode = PhysicalResourceProvider.NORMALIZE_EOL_ALWAYS;
+    expect(FileSource.fileReadMode('a'), 'a');
+
+    // '\n' -> '\n' as first, last and only character
+    expect(FileSource.fileReadMode('\n'), '\n');
+    expect(FileSource.fileReadMode('a\n'), 'a\n');
+    expect(FileSource.fileReadMode('\na'), '\na');
+
+    // '\r\n' -> '\n' as first, last and only character
+    expect(FileSource.fileReadMode('\r\n'), '\n');
+    expect(FileSource.fileReadMode('a\r\n'), 'a\n');
+    expect(FileSource.fileReadMode('\r\na'), '\na');
+
+    // '\r' -> '\n' as first, last and only character
+    expect(FileSource.fileReadMode('\r'), '\n');
+    expect(FileSource.fileReadMode('a\r'), 'a\n');
+    expect(FileSource.fileReadMode('\ra'), '\na');
+
+    FileSource.fileReadMode = (String s) => s;
+  }
+
+  void test_getEncoding() {
+    SourceFactory factory =
+        new SourceFactory([new ResourceUriResolver(resourceProvider)]);
+    String fullPath = "/does/not/exist.dart";
+    File file = resourceProvider.getFile(fullPath);
+    FileSource source = new FileSource(file);
+    expect(factory.fromEncoding(source.encoding), source);
+  }
+
+  void test_getFullName() {
+    String fullPath = "/does/not/exist.dart";
+    File file = resourceProvider.getFile(fullPath);
+    FileSource source = new FileSource(file);
+    expect(source.fullName, file.path);
+  }
+
+  void test_getShortName() {
+    File file = resourceProvider.getFile("/does/not/exist.dart");
+    FileSource source = new FileSource(file);
+    expect(source.shortName, "exist.dart");
+  }
+
+  void test_hashCode() {
+    File file1 = resourceProvider.getFile("/does/not/exist.dart");
+    File file2 = resourceProvider.getFile("/does/not/exist.dart");
+    FileSource source1 = new FileSource(file1);
+    FileSource source2 = new FileSource(file2);
+    expect(source2.hashCode, source1.hashCode);
+  }
+
+  void test_isInSystemLibrary_contagious() {
+    DartSdk sdk = _createSdk();
+    UriResolver resolver = new DartUriResolver(sdk);
+    SourceFactory factory = new SourceFactory([resolver]);
+    // resolve dart:core
+    Source result =
+        resolver.resolveAbsolute(parseUriWithException("dart:async"));
+    expect(result, isNotNull);
+    expect(result.isInSystemLibrary, isTrue);
+    // system libraries reference only other system libraries
+    Source partSource = factory.resolveUri(result, "stream.dart");
+    expect(partSource, isNotNull);
+    expect(partSource.isInSystemLibrary, isTrue);
+  }
+
+  void test_isInSystemLibrary_false() {
+    File file = resourceProvider.getFile("/does/not/exist.dart");
+    FileSource source = new FileSource(file);
+    expect(source, isNotNull);
+    expect(source.fullName, file.path);
+    expect(source.isInSystemLibrary, isFalse);
+  }
+
+  void test_issue14500() {
+    // see https://code.google.com/p/dart/issues/detail?id=14500
+    FileSource source =
+        new FileSource(resourceProvider.getFile("/some/packages/foo:bar.dart"));
+    expect(source, isNotNull);
+    expect(source.exists(), isFalse);
+  }
+
+  void test_resolveRelative_file_fileName() {
+    if (OSUtilities.isWindows()) {
+      // On Windows, the URI that is produced includes a drive letter,
+      // which I believe is not consistent across all machines that might run
+      // this test.
+      return;
+    }
+    File file = resourceProvider.getFile("/a/b/test.dart");
+    FileSource source = new FileSource(file);
+    expect(source, isNotNull);
+    Uri relative =
+        resolveRelativeUri(source.uri, parseUriWithException("lib.dart"));
+    expect(relative, isNotNull);
+    expect(relative.toString(), "file:///a/b/lib.dart");
+  }
+
+  void test_resolveRelative_file_filePath() {
+    if (OSUtilities.isWindows()) {
+      // On Windows, the URI that is produced includes a drive letter,
+      // which I believe is not consistent across all machines that might run
+      // this test.
+      return;
+    }
+    File file = resourceProvider.getFile("/a/b/test.dart");
+    FileSource source = new FileSource(file);
+    expect(source, isNotNull);
+    Uri relative =
+        resolveRelativeUri(source.uri, parseUriWithException("c/lib.dart"));
+    expect(relative, isNotNull);
+    expect(relative.toString(), "file:///a/b/c/lib.dart");
+  }
+
+  void test_resolveRelative_file_filePathWithParent() {
+    if (OSUtilities.isWindows()) {
+      // On Windows, the URI that is produced includes a drive letter, which I
+      // believe is not consistent across all machines that might run this test.
+      return;
+    }
+    File file = resourceProvider.getFile("/a/b/test.dart");
+    FileSource source = new FileSource(file);
+    expect(source, isNotNull);
+    Uri relative =
+        resolveRelativeUri(source.uri, parseUriWithException("../c/lib.dart"));
+    expect(relative, isNotNull);
+    expect(relative.toString(), "file:///a/c/lib.dart");
+  }
+
+  void test_system() {
+    File file = resourceProvider.getFile("/does/not/exist.dart");
+    FileSource source =
+        new FileSource(file, parseUriWithException("dart:core"));
+    expect(source, isNotNull);
+    expect(source.fullName, file.path);
+    expect(source.isInSystemLibrary, isTrue);
+  }
+
+  DartSdk _createSdk() {
+    return new MockSdk(resourceProvider: resourceProvider);
+  }
+}