Switch FE to use the libraries.json format.

pkg/front_end/test/src/base/processed_options_test.dart

 // Copyright (c) 2017, 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:async';
 
 import 'package:front_end/compiler_options.dart';
 import 'package:front_end/memory_file_system.dart';
 import 'package:front_end/src/base/processed_options.dart';
 import 'package:front_end/src/fasta/fasta.dart' show ByteSink;
+import 'package:front_end/src/fasta/compiler_context.dart';
 import 'package:front_end/src/fasta/fasta_codes.dart';
 import 'package:kernel/binary/ast_to_binary.dart' show BinaryPrinter;
 import 'package:kernel/kernel.dart' show Program, Library, CanonicalName;
 import 'package:package_config/packages.dart' show Packages;
 
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 main() {
-  defineReflectiveSuite(() {
-    defineReflectiveTests(ProcessedOptionsTest);
+  CompilerContext.runWithDefaultOptions((_) {
+    defineReflectiveSuite(() {
+      defineReflectiveTests(ProcessedOptionsTest);
+    });
   });
 }
 
 @reflectiveTest
 class ProcessedOptionsTest {
   MemoryFileSystem fileSystem = new MemoryFileSystem(Uri.parse('file:///'));
 
   Program _mockOutline;
 
   Program get mockSummary => _mockOutline ??=
@@ skipping 45 matching lines @@
     fileSystem.entityForUri(uri).writeAsBytesSync(sink.builder.takeBytes());
   }
 
   Future<Null> checkMockSummary(CompilerOptions raw) async {
     var processed = new ProcessedOptions(raw);
     var sdkSummary = await processed.loadSdkSummary(new CanonicalName.root());
     expect(sdkSummary.libraries.single.importUri,
         mockSummary.libraries.single.importUri);
   }
 
+  test_getUriTranslator_explicitLibrariesSpec() async {
+    fileSystem
+        .entityForUri(Uri.parse('file:///.packages'))
+        .writeAsStringSync('');
+    fileSystem
+        .entityForUri(Uri.parse('file:///libraries.json'))
+        .writeAsStringSync('{"vm":{"libraries":{"foo":{"uri":"bar.dart"}}}}');
+    var raw = new CompilerOptions()
+      ..packagesFileUri = Uri.parse('file:///.packages')
+      ..fileSystem = fileSystem
+      ..librariesSpecificationUri = Uri.parse('file:///libraries.json');
+    var processed = new ProcessedOptions(raw);
+    var uriTranslator = await processed.getUriTranslator();
+    expect(uriTranslator.dartLibraries.libraryInfoFor('foo').uri.path,
+        '/bar.dart');
+  }
+
+  test_getUriTranslator_inferredLibrariesSpec() async {
+    fileSystem
+        .entityForUri(Uri.parse('file:///.packages'))
+        .writeAsStringSync('');
+    fileSystem
+        .entityForUri(Uri.parse('file:///mysdk/lib/libraries.json'))
+        .writeAsStringSync('{"vm":{"libraries":{"foo":{"uri":"bar.dart"}}}}');
+    var raw = new CompilerOptions()
+      ..fileSystem = fileSystem
+      ..packagesFileUri = Uri.parse('file:///.packages')
+      ..compileSdk = true
+      ..sdkRoot = Uri.parse('file:///mysdk/');
+    var processed = new ProcessedOptions(raw);
+    var uriTranslator = await processed.getUriTranslator();
+    expect(uriTranslator.dartLibraries.libraryInfoFor('foo').uri.path,
+        '/mysdk/lib/bar.dart');
+  }
+
+  test_getUriTranslator_notInferredLibrariesSpec() async {
+    fileSystem
+        .entityForUri(Uri.parse('file:///.packages'))
+        .writeAsStringSync('');
+    fileSystem
+        .entityForUri(Uri.parse('file:///mysdk/lib/libraries.json'))
+        .writeAsStringSync('{"vm":{"libraries":{"foo":{"uri":"bar.dart"}}}}');
+    var raw = new CompilerOptions()
+      ..fileSystem = fileSystem
+      ..packagesFileUri = Uri.parse('file:///.packages')
+      ..compileSdk = false // libraries.json is only inferred if true
+      ..sdkRoot = Uri.parse('file:///mysdk/');
+    var processed = new ProcessedOptions(raw);
+    var uriTranslator = await processed.getUriTranslator();
+    expect(uriTranslator.dartLibraries.libraryInfoFor('foo'), isNull);
+  }
+
   checkPackageExpansion(
       String packageName, String packageDir, Packages packages) {
     var input = Uri.parse('package:$packageName/a.dart');
     var expected = Uri.parse('file:///$packageDir/a.dart');
     expect(packages.resolve(input), expected);
   }
 
   test_getUriTranslator_explicitPackagesFile() async {
     // This .packages file should be ignored.
     fileSystem
@@ skipping 294 matching lines @@
     var index = messageTemplate.indexOf('#');
     var prefix = messageTemplate.substring(0, index - 1);
 
     // Check that the prefix is not empty and that it contains more than one
     // word.
     expect(prefix.length > 0, isTrue);
     expect(prefix.contains(' '), isTrue);
     return prefix;
   }
 }