Merge kernel closure conversion into the Dart SDK

pkg/kernel/test/closures/suite.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.md file.
+
+library test.kernel.closures.suite;
+
+import 'dart:async' show Future;
+
+import 'dart:io' show Directory, File, Platform;
+
+import 'package:analyzer/src/generated/sdk.dart' show DartSdk;
+
+import 'package:kernel/analyzer/loader.dart'
+    show DartLoader, DartOptions, createDartSdk;
+
+import 'package:kernel/target/targets.dart' show Target, TargetFlags, getTarget;
+
+import 'package:kernel/repository.dart' show Repository;
+
+import 'kernel_chain.dart'
+    show MatchExpectation, Print, ReadDill, SanityCheck, WriteDill;
+
+import 'package:testing/testing.dart'
+    show
+        Chain,
+        ChainContext,
+        Result,
+        StdioProcess,
+        Step,
+        TestDescription,
+        runMe;
+
+import 'package:kernel/ast.dart' show Program;
+
+import 'package:kernel/transformations/closure_conversion.dart'
+    as closure_conversion;
+
+import 'package:package_config/discovery.dart' show loadPackagesFile;
+
+class TestContext extends ChainContext {
+  final Uri vm;
+
+  final Uri packages;
+
+  final DartOptions options;
+
+  final DartSdk dartSdk;
+
+  final List<Step> steps;
+
+  TestContext(String sdk, this.vm, Uri packages, bool strongMode, this.dartSdk,
+      bool updateExpectations)
+      : packages = packages,
+        options = new DartOptions(
+            strongMode: strongMode,
+            sdk: sdk,
+            packagePath: packages.toFilePath()),
+        steps = <Step>[
+          const Kernel(),
+          const Print(),
+          const SanityCheck(),
+          const ClosureConversion(),
+          const Print(),
+          const SanityCheck(),
+          new MatchExpectation(".expect",
+              updateExpectations: updateExpectations),
+          const WriteDill(),
+          const ReadDill(),
+          const Run(),
+        ];
+
+  Future<DartLoader> createLoader() async {
+    Repository repository = new Repository();
+    return new DartLoader(repository, options, await loadPackagesFile(packages),
+        dartSdk: dartSdk);
+  }
+}
+
+enum Environment {
+  directory,
+  file,
+}
+
+Future<String> getEnvironmentVariable(
+    String name, Environment kind, String undefined, notFound(String n)) async {
+  String result = Platform.environment[name];
+  if (result == null) {
+    throw undefined;
+  }
+  switch (kind) {
+    case Environment.directory:
+      if (!await new Directory(result).exists()) throw notFound(result);
+      break;
+
+    case Environment.file:
+      if (!await new File(result).exists()) throw notFound(result);
+      break;
+  }
+  return result;
+}
+
+Future<bool> fileExists(Uri base, String path) async {
+  return await new File.fromUri(base.resolve(path)).exists();
+}
+
+Future<TestContext> createContext(
+    Chain suite, Map<String, String> environment) async {
+  const String suggestion = """Try building the patched SDK by running
+    'tools/build.py patched_sdk'""";
+
+  // TODO(karlklose): The path is different on MacOS.
+  String sdk = "out/DebugX64/patched_sdk/";
+  Uri sdkUri = Uri.base.resolve(sdk);
+  const String asyncDart = "lib/async/async.dart";
+  if (!await fileExists(sdkUri, asyncDart)) {
+    throw "Couldn't find the patched SDK. $suggestion";
+  }
+  const String asyncSources = "lib/async/async_sources.gypi";
+  if (await fileExists(sdkUri, asyncSources)) {
+    throw "Found '$asyncSources' in '$sdk', so it isn't a patched SDK. "
+        "$suggestion";
+  }
+
+  // TODO(karlklose): select the VM based on the mode.
+  Uri vm = Uri.base.resolve("out/ReleaseX64/dart");
+
+  Uri packages = Uri.base.resolve(".packages");
+  bool strongMode = false;
+  bool updateExpectations = environment["updateExpectations"] != "false";
+  return new TestContext(sdk, vm, packages, strongMode,
+      createDartSdk(sdk, strongMode: strongMode), updateExpectations);
+}
+
+class Kernel extends Step<TestDescription, Program, TestContext> {
+  const Kernel();
+
+  String get name => "kernel";
+
+  Future<Result<Program>> run(
+      TestDescription description, TestContext testContext) async {
+    try {
+      DartLoader loader = await testContext.createLoader();
+      Target target = getTarget(
+          "vm", new TargetFlags(strongMode: testContext.options.strongMode));
+      String path = description.file.path;
+      Uri uri = Uri.base.resolve(path);
+      Program program = loader.loadProgram(uri, target: target);
+      for (var error in loader.errors) {
+        return fail(program, "$error");
+      }
+      target.transformProgram(program);
+      return pass(program);
+    } catch (e, s) {
+      return crash(e, s);
+    }
+  }
+}
+
+class ClosureConversion extends Step<Program, Program, TestContext> {
+  const ClosureConversion();
+
+  String get name => "closure conversion";
+
+  Future<Result<Program>> run(Program program, TestContext testContext) async {
+    try {
+      program = closure_conversion.transformProgram(program);
+      return pass(program);
+    } catch (e, s) {
+      return crash(e, s);
+    }
+  }
+}
+
+class Run extends Step<Uri, int, TestContext> {
+  const Run();
+
+  String get name => "run";
+
+  Future<Result<int>> run(Uri uri, TestContext context) async {
+    File generated = new File.fromUri(uri);
+    StdioProcess process;
+    try {
+      process = await StdioProcess
+          .run(context.vm.toFilePath(), [generated.path, "Hello, World!"]);
+      print(process.output);
+    } finally {
+      generated.parent.delete(recursive: true);
+    }
+    return process.toResult();
+  }
+}
+
+main(List<String> arguments) => runMe(arguments, createContext, "testing.json");