pkg/kernel/test/text_serializer_test.dart

// Copyright (c) 2018, 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 kernel.text_serializer_test;

import 'package:kernel/ast.dart';
import 'package:kernel/text/serializer_combinators.dart';
import 'package:kernel/text/text_reader.dart';
import 'package:kernel/text/text_serializer.dart';

void main() {
  initializeSerializers();
  test();
}

// Wrappers for testing.
Expression readExpression(String input) {
  TextIterator stream = new TextIterator(input, 0);
  stream.moveNext();
  Expression result = expressionSerializer.readFrom(
      stream, new DeserializationState(null, new CanonicalName.root()));
  if (stream.moveNext()) {
    throw StateError("extra cruft in basic literal");
  }
  return result;
}

String writeExpression(Expression expression) {
  StringBuffer buffer = new StringBuffer();
  expressionSerializer.writeTo(
      buffer, expression, new SerializationState(null));
  return buffer.toString();
}

void test() {
  List<String> failures = [];
  List<String> tests = [
    '(get-prop (int 0) (public "hashCode"))',
    '(get-super (public "hashCode"))',
    '(invoke-method (int 0) (public "foo") () ((int 1) (int 2)) ())',
    '(invoke-method (int 0) (public "foo") ((dynamic) (void)) '
        '((int 1) (int 2)) ("others" (list (dynamic) ((int 3) (int 4)))))',
    '(let (var "x^0" (dynamic) (int 0) ()) (null))',
    '(let (var "x^0" (dynamic) _ ()) (null))',
    '(let (const "x^0" (dynamic) (int 0) ()) (null))',
    '(let (const "x^0" (dynamic) _ ()) (null))',
    '(let (final "x^0" (dynamic) (int 0) ()) (null))',
    '(let (final "x^0" (dynamic) _ ()) (null))',
    r'''(string "Hello, 'string'!")''',
    r'''(string "Hello, \"string\"!")''',
    r'''(string "Yeah nah yeah, here is\nthis really long string haiku\n'''
        r'''blowing in the wind\n")''',
    '(int 42)',
    '(int 0)',
    '(int -1001)',
    '(double 3.14159)',
    '(bool true)',
    '(bool false)',
    '(null)',
    r'''(invalid "You can't touch this")''',
    '(not (bool true))',
    '(&& (bool true) (bool false))',
    '(|| (&& (bool true) (not (bool true))) (bool true))',
    '(concat ((string "The opposite of ") (int 3) '
        '(string " is ") (int 7)))',
    '(symbol "unquote-splicing")',
    '(this)',
    '(rethrow)',
    '(throw (string "error"))',
    '(await (null))',
    '(cond (bool true) (dynamic) (int 0) (int 1))',
    '(is (bool true) (invalid))',
    '(as (bool true) (void))',
    '(type (bottom))',
    '(list (dynamic) ((null) (null) (null)))',
    '(const-list (dynamic) ((int 0) (int 1) (int 2)))',
    '(set (dynamic) ((bool true) (bool false) (int 0)))',
    '(const-set (dynamic) ((int 0) (int 1) (int 2)))',
    '(map (dynamic) (void) ((int 0) (null) (int 1) (null) (int 2) (null)))',
    '(const-map (dynamic) (void) ((int 0) (null) (int 1) (null) '
        '(int 2) (null)))',
    '(type (-> () () () ((dynamic)) () () (dynamic)))',
    '(type (-> () () () () ((dynamic)) () (dynamic)))',
    '(type (-> () () () ((dynamic) (dynamic)) () () (dynamic)))',
    '(type (-> () () () () () () (dynamic)))',
    '(type (-> () () () ((-> () () () ((dynamic)) () () (dynamic))) () () '
        '(dynamic)))',
    '(type (-> ("T^0") ((dynamic)) ((dynamic)) () () () (dynamic)))',
    '(type (-> ("T^0") ((dynamic)) ((dynamic)) ((par "T^0" _)) () () '
        '(par "T^0" _)))',
    '(type (-> ("T^0" "S^1") ((par "S^1" _) (par "T^0" _)) ((dynamic) '
        '(dynamic)) () () () (dynamic)))',
  ];
  for (var test in tests) {
    var literal = readExpression(test);
    var output = writeExpression(literal);
    if (output != test) {
      failures.add('* input "${test}" gave output "${output}"');
    }
  }
  if (failures.isNotEmpty) {
    print('Round trip failures:');
    failures.forEach(print);
    throw StateError('Round trip failures');
  }
}