Add tests for handling closures in LocalInitializers

pkg/kernel/test/closures_initializers/suite.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.md file.
+
+library test.kernel.closures.suite;
+
+import 'dart:async' show Future;
+
+import 'package:front_end/physical_file_system.dart' show PhysicalFileSystem;
+
+import 'package:kernel/core_types.dart' show CoreTypes;
+
+import 'package:testing/testing.dart'
+    show Chain, ChainContext, Result, Step, TestDescription, runMe;
+
+import 'package:front_end/src/fasta/testing/patched_sdk_location.dart'
+    show computePatchedSdk;
+
+import 'package:kernel/ast.dart' show Program, Library;
+
+import 'package:kernel/transformations/argument_extraction_for_redirecting.dart'
+    as argument_extraction;
+
+import 'package:kernel/transformations/closure_conversion.dart'
+    as closure_conversion;
+
+import 'package:front_end/src/fasta/testing/kernel_chain.dart'
+    show Print, MatchExpectation, WriteDill, ReadDill, Verify;
+
+import 'package:front_end/src/fasta/ticker.dart' show Ticker;
+
+import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget;
+
+import 'package:front_end/src/fasta/kernel/kernel_target.dart'
+    show KernelTarget;
+
+import 'package:front_end/src/fasta/translate_uri.dart' show TranslateUri;
+
+import 'package:front_end/src/fasta/errors.dart' show InputError;
+
+import 'package:front_end/src/fasta/testing/patched_sdk_location.dart';
+
+import 'package:kernel/kernel.dart' show loadProgramFromBinary;
+
+import 'package:kernel/target/targets.dart' show TargetFlags;
+
+import 'package:kernel/target/vm_fasta.dart' show VmFastaTarget;
+
+const String STRONG_MODE = " strong mode ";
+
+class ClosureConversionContext extends ChainContext {
+  final bool strongMode;
+
+  final TranslateUri uriTranslator;
+
+  final List<Step> steps;
+
+  ClosureConversionContext(
+      this.strongMode, bool updateExpectations, this.uriTranslator)
+      : steps = <Step>[
+          const FastaCompile(),
+          const Print(),
+          const Verify(true),
+          const ArgumentExtraction(),
+          const Print(),
+          const Verify(true),
+          const ClosureConversion(),
+          const Print(),
+          const Verify(true),
+          new MatchExpectation(".expect",
+              updateExpectations: updateExpectations),
+          const WriteDill(),
+          const ReadDill(),
+          // TODO(29143): add `Run` step when Vectors are added to VM.
+        ];
+
+  Future<Program> loadPlatform() async {
+    Uri sdk = await computePatchedSdk();
+    return loadProgramFromBinary(sdk.resolve('platform.dill').toFilePath());
+  }
+
+  static Future<ClosureConversionContext> create(
+      Chain suite, Map<String, String> environment) async {
+    Uri sdk = await computePatchedSdk();
+    Uri packages = Uri.base.resolve(".packages");
+    bool strongMode = environment.containsKey(STRONG_MODE);
+    bool updateExpectations = environment["updateExpectations"] == "true";
+    TranslateUri uriTranslator = await TranslateUri
+        .parse(PhysicalFileSystem.instance, sdk, packages: packages);
+    return new ClosureConversionContext(
+        strongMode, updateExpectations, uriTranslator);
+  }
+}
+
+Future<ClosureConversionContext> createContext(
+    Chain suite, Map<String, String> environment) async {
+  environment["updateExpectations"] =
+      const String.fromEnvironment("updateExpectations");
+  return ClosureConversionContext.create(suite, environment);
+}
+
+class FastaCompile
+    extends Step<TestDescription, Program, ClosureConversionContext> {
+  const FastaCompile();
+
+  String get name => "fasta compilation";
+
+  Future<Result<Program>> run(
+      TestDescription description, ClosureConversionContext context) async {
+    Program platform = await context.loadPlatform();
+    Ticker ticker = new Ticker();
+    DillTarget dillTarget = new DillTarget(ticker, context.uriTranslator,
+        new VmFastaTarget(new TargetFlags(strongMode: context.strongMode)));
+    platform.unbindCanonicalNames();
+    dillTarget.loader.appendLibraries(platform);
+    KernelTarget sourceTarget = new KernelTarget(
+        PhysicalFileSystem.instance, dillTarget, context.uriTranslator);
+
+    Program p;
+    try {
+      sourceTarget.read(description.uri);
+      await dillTarget.buildOutlines();
+      await sourceTarget.buildOutlines();
+      p = await sourceTarget.buildProgram();
+    } on InputError catch (e, s) {
+      return fail(null, e.error, s);
+    }
+    return pass(p);
+  }
+}
+
+class ArgumentExtraction
+    extends Step<Program, Program, ClosureConversionContext> {
+  const ArgumentExtraction();
+
+  String get name => "argument extraction";
+
+  Future<Result<Program>> run(
+      Program program, ClosureConversionContext context) async {
+    try {
+      CoreTypes coreTypes = new CoreTypes(program);
+      Library library = program.libraries
+          .firstWhere((Library library) => library.importUri.scheme != "dart");
+      argument_extraction.transformLibraries(coreTypes, <Library>[library]);
+      return pass(program);
+    } catch (e, s) {
+      return crash(e, s);
+    }
+  }
+}
+
+class ClosureConversion
+    extends Step<Program, Program, ClosureConversionContext> {
+  const ClosureConversion();
+
+  String get name => "closure conversion";
+
+  Future<Result<Program>> run(
+      Program program, ClosureConversionContext testContext) async {
+    try {
+      CoreTypes coreTypes = new CoreTypes(program);
+      Library library = program.libraries
+          .firstWhere((Library library) => library.importUri.scheme != "dart");
+      closure_conversion.transformLibraries(coreTypes, <Library>[library]);
+      return pass(program);
+    } catch (e, s) {
+      return crash(e, s);
+    }
+  }
+}
+
+main(List<String> arguments) => runMe(arguments, createContext, "testing.json");