Switch to Fasta in "golden" tests of closure conversion

pkg/kernel/test/closures/kernel_chain.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, IOSink;
-
-import 'dart:typed_data' show Uint8List;
-
-import 'package:kernel/kernel.dart' show loadProgramFromBinary;
-
-import 'package:kernel/text/ast_to_text.dart' show Printer;
-
-import 'package:testing/testing.dart'
-    show ChainContext, Result, StdioProcess, Step;
-
-import 'package:kernel/ast.dart' show Library, Program;
-
-import 'package:kernel/verifier.dart' show verifyProgram;
-
-import 'package:kernel/binary/ast_to_binary.dart' show BinaryPrinter;
-
-import 'package:kernel/binary/ast_from_binary.dart' show BinaryBuilder;
-
-Future<bool> fileExists(Uri base, String path) async {
-  return await new File.fromUri(base.resolve(path)).exists();
-}
-
-class Print extends Step<Program, Program, ChainContext> {
-  const Print();
-
-  String get name => "print";
-
-  Future<Result<Program>> run(Program program, _) async {
-    StringBuffer sb = new StringBuffer();
-    for (Library library in program.libraries) {
-      Printer printer = new Printer(sb);
-      if (library.importUri.scheme != "dart") {
-        printer.writeLibraryFile(library);
-      }
-    }
-    print("$sb");
-    return pass(program);
-  }
-}
-
-class SanityCheck extends Step<Program, Program, ChainContext> {
-  const SanityCheck();
-
-  String get name => "sanity check";
-
-  Future<Result<Program>> run(Program program, _) async {
-    try {
-      verifyProgram(program);
-      return pass(program);
-    } catch (e, s) {
-      return crash(e, s);
-    }
-  }
-}
-
-class MatchExpectation extends Step<Program, Program, ChainContext> {
-  final String suffix;
-
-  final bool updateExpectations;
-
-  const MatchExpectation(this.suffix, {this.updateExpectations: true});
-
-  String get name => "match expectations";
-
-  Future<Result<Program>> run(Program program, _) async {
-    Library library = program.libraries
-        .firstWhere((Library library) => library.importUri.scheme != "dart");
-    Uri uri = library.importUri;
-    StringBuffer buffer = new StringBuffer();
-    new Printer(buffer).writeLibraryFile(library);
-
-    File expectedFile = new File("${uri.toFilePath()}$suffix");
-    if (await expectedFile.exists()) {
-      String expected = await expectedFile.readAsString();
-      if (expected.trim() != "$buffer".trim()) {
-        if (!updateExpectations) {
-          String diff = await runDiff(expectedFile.uri, "$buffer");
-          return fail(null, "$uri doesn't match ${expectedFile.uri}\n$diff");
-        }
-      } else {
-        return pass(program);
-      }
-    }
-    if (updateExpectations) {
-      await openWrite(expectedFile.uri, (IOSink sink) {
-        sink.writeln("$buffer".trim());
-      });
-      return pass(program);
-    } else {
-      return fail(
-          program,
-          """
-Please create file ${expectedFile.path} with this content:
-$buffer""");
-    }
-  }
-}
-
-class WriteDill extends Step<Program, Uri, ChainContext> {
-  const WriteDill();
-
-  String get name => "write .dill";
-
-  Future<Result<Uri>> run(Program program, _) async {
-    Directory tmp = await Directory.systemTemp.createTemp();
-    Uri uri = tmp.uri.resolve("generated.dill");
-    File generated = new File.fromUri(uri);
-    IOSink sink = generated.openWrite();
-    try {
-      new BinaryPrinter(sink).writeProgramFile(program);
-      program.unbindCanonicalNames();
-    } catch (e, s) {
-      return fail(uri, e, s);
-    } finally {
-      print("Wrote `${generated.path}`");
-      await sink.close();
-    }
-    return pass(uri);
-  }
-}
-
-class ReadDill extends Step<Uri, Uri, ChainContext> {
-  const ReadDill();
-
-  String get name => "read .dill";
-
-  Future<Result<Uri>> run(Uri uri, _) async {
-    try {
-      loadProgramFromBinary(uri.toFilePath());
-    } catch (e, s) {
-      return fail(uri, e, s);
-    }
-    return pass(uri);
-  }
-}
-
-class Copy extends Step<Program, Program, ChainContext> {
-  const Copy();
-
-  String get name => "copy program";
-
-  Future<Result<Program>> run(Program program, _) async {
-    BytesCollector sink = new BytesCollector();
-    new BinaryPrinter(sink).writeProgramFile(program);
-    program.unbindCanonicalNames();
-    Uint8List bytes = sink.collect();
-    var newProgram = new Program();
-    new BinaryBuilder(bytes).readProgram(newProgram);
-    newProgram.unbindCanonicalNames();
-    return pass(newProgram);
-  }
-}
-
-class BytesCollector implements Sink<List<int>> {
-  final List<List<int>> lists = <List<int>>[];
-
-  int length = 0;
-
-  void add(List<int> data) {
-    lists.add(data);
-    length += data.length;
-  }
-
-  Uint8List collect() {
-    Uint8List result = new Uint8List(length);
-    int offset = 0;
-    for (List<int> list in lists) {
-      result.setRange(offset, offset += list.length, list);
-    }
-    lists.clear();
-    length = 0;
-    return result;
-  }
-
-  void close() {}
-}
-
-Future<String> runDiff(Uri expected, String actual) async {
-  StdioProcess process = await StdioProcess
-      .run("diff", <String>["-u", expected.toFilePath(), "-"], input: actual);
-  return process.output;
-}
-
-Future openWrite(Uri uri, f(IOSink sink)) async {
-  IOSink sink = new File.fromUri(uri).openWrite();
-  try {
-    await f(sink);
-  } finally {
-    await sink.close();
-  }
-  print("Wrote $uri");
-}