tests/compiler/dart2js/list_tracer_test.dart

// Copyright (c) 2013, 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 'package:expect/expect.dart';
import "package:async_helper/async_helper.dart";
import 'package:compiler/src/types/types.dart'
    show ContainerTypeMask, TypeMask;

import 'compiler_helper.dart';
import 'parser_helper.dart';
import 'type_mask_test_helper.dart';

String generateTest(String listAllocation) {
  return """
int anInt = 42;
double aDouble = 42.5;

class A {
  final field;
  var nonFinalField;

  A(this.field);

  A.bar(list) {
    nonFinalField = list;
  }

  receiveIt(list) {
    list[0] = aDouble;
  }

  returnIt() {
    return listReturnedFromSelector;
  }

  useField() {
    field[0] = aDouble;
  }

  set callSetter(list) {
    list[0] = aDouble;
  }

  operator[](index) {
    index[0] = aDouble;
  }

  operator[]=(index, value) {
    index[0] = anInt;
    if (value == listEscapingTwiceInIndexSet) {
      value[0] = aDouble;
    }
  }
}

class B extends A {
  B(list) : super.bar(list);

  set nonFinalField(value) {
    value[0] = aDouble;
  }
}

var listInField = $listAllocation;
var listPassedToClosure = $listAllocation;
var listReturnedFromClosure = $listAllocation;
var listPassedToMethod = $listAllocation;
var listReturnedFromMethod = $listAllocation;
var listUsedWithCascade = $listAllocation;
var listUsedInClosure = $listAllocation;
var listPassedToSelector = $listAllocation;
var listReturnedFromSelector = $listAllocation;
var listUsedWithAddAndInsert = $listAllocation;
var listUsedWithNonOkSelector = $listAllocation;
var listUsedWithConstraint = $listAllocation;
var listEscapingFromSetter = $listAllocation;
var listUsedInLocal = $listAllocation;
var listUnset = $listAllocation;
var listOnlySetWithConstraint = $listAllocation;
var listEscapingInSetterValue = $listAllocation;
var listEscapingInIndex = $listAllocation;
var listEscapingInIndexSet = $listAllocation;
var listEscapingTwiceInIndexSet = $listAllocation;
var listPassedAsOptionalParameter = $listAllocation;
var listPassedAsNamedParameter = $listAllocation;
var listSetInNonFinalField = $listAllocation;
var listWithChangedLength = $listAllocation;
var listStoredInList = $listAllocation;
var listStoredInListButEscapes = $listAllocation;

foo(list) {
  list[0] = aDouble;
}

bar() {
  return listReturnedFromMethod;
}

takeOptional([list]) {
  list[0] = aDouble;
}

takeNamed({list}) {
  list[0] = aDouble;
}

main() {
  listReturnedFromMethod[0] = anInt;
  bar()[0] = aDouble;

  listPassedToMethod[0] = anInt;
  foo(listPassedToMethod);

  listPassedToClosure[0] = anInt;
  ((a) => a[0] = aDouble)(listPassedToClosure);

  listReturnedFromClosure[0] = anInt;
  (() => listReturnedFromClosure)()[0] = aDouble;

  listInField[0] = anInt;
  new A(listInField).useField();

  listUsedWithCascade[0] = anInt;
  listUsedWithCascade..[0] = aDouble;

  listUsedInClosure[0] = anInt;
  (() => listUsedInClosure[0] = aDouble)();

  listPassedToSelector[0] = anInt;
  new A(null).receiveIt(listPassedToSelector);

  listReturnedFromSelector[0] = anInt;
  new A(null).returnIt()[0] = aDouble;

  listUsedWithAddAndInsert.add(anInt);
  listUsedWithAddAndInsert.insert(0, aDouble);

  listUsedWithNonOkSelector[0] = anInt;
  listUsedWithNonOkSelector.addAll(listPassedToClosure);

  listUsedWithConstraint[0] = anInt;
  listUsedWithConstraint[0]++;
  listUsedWithConstraint[0] += anInt;

  listEscapingFromSetter[0] = anInt;
  foo(new A(null).field = listEscapingFromSetter);

  listUsedInLocal[0] = anInt;
  var a = listUsedInLocal;
  listUsedInLocal[1] = aDouble;

  // At least use [listUnused] in a local to pretend it's used.
  var b = listUnset;

  listOnlySetWithConstraint[0]++;

  listEscapingInSetterValue[0] = anInt;
  new A(null).callSetter = listEscapingInSetterValue;

  listEscapingInIndex[0] = anInt;
  new A(null)[listEscapingInIndex];

  new A(null)[listEscapingInIndexSet] = 42;

  new A(null)[listEscapingTwiceInIndexSet] = listEscapingTwiceInIndexSet;

  listPassedAsOptionalParameter[0] = anInt;
  takeOptional(listPassedAsOptionalParameter);

  listPassedAsNamedParameter[0] = anInt;
  takeNamed(list: listPassedAsNamedParameter);

  listSetInNonFinalField[0] = anInt;
  new B(listSetInNonFinalField);

  listWithChangedLength[0] = anInt;
  listWithChangedLength.length = 54;

  a = [listStoredInList];
  a[0][0] = 42;

  a = [listStoredInListButEscapes];
  a[0][0] = 42;
  a.forEach((e) => print(e));
}
""";
}

void main() {
  doTest('[]', nullify: false); // Test literal list.
  doTest('new List()', nullify: false); // Test growable list.
  doTest('new List(1)', nullify: true); // Test fixed list.
  doTest('new List.filled(1, 0)', nullify: false); // Test List.filled.
  doTest('new List.filled(1, null)', nullify: true); // Test List.filled.
}

void doTest(String allocation, {bool nullify}) {
  Uri uri = new Uri(scheme: 'source');
  var compiler = compilerFor(generateTest(allocation), uri,
      expectedErrors: 0, expectedWarnings: 1);
  asyncTest(() => compiler.runCompiler(uri).then((_) {
    var typesTask = compiler.typesTask;
    var typesInferrer = typesTask.typesInferrer;

    checkType(String name, type) {
      var element = findElement(compiler, name);
      ContainerTypeMask mask = typesInferrer.getTypeOfElement(element);
      if (nullify) type = type.nullable();
      Expect.equals(type, simplify(mask.elementType, compiler), name);
    }

    checkType('listInField', typesTask.numType);
    checkType('listPassedToMethod', typesTask.numType);
    checkType('listReturnedFromMethod', typesTask.numType);
    checkType('listUsedWithCascade', typesTask.numType);
    checkType('listUsedInClosure', typesTask.numType);
    checkType('listPassedToSelector', typesTask.numType);
    checkType('listReturnedFromSelector', typesTask.numType);
    checkType('listUsedWithAddAndInsert', typesTask.numType);
    checkType('listUsedWithConstraint', typesTask.positiveIntType);
    checkType('listEscapingFromSetter', typesTask.numType);
    checkType('listUsedInLocal', typesTask.numType);
    checkType('listEscapingInSetterValue', typesTask.numType);
    checkType('listEscapingInIndex', typesTask.numType);
    checkType('listEscapingInIndexSet', typesTask.uint31Type);
    checkType('listEscapingTwiceInIndexSet', typesTask.numType);
    checkType('listSetInNonFinalField', typesTask.numType);
    checkType('listWithChangedLength', typesTask.uint31Type.nullable());

    checkType('listPassedToClosure', typesTask.dynamicType);
    checkType('listReturnedFromClosure', typesTask.dynamicType);
    checkType('listUsedWithNonOkSelector', typesTask.dynamicType);
    checkType('listPassedAsOptionalParameter', typesTask.numType);
    checkType('listPassedAsNamedParameter', typesTask.numType);
    checkType('listStoredInList', typesTask.uint31Type);
    checkType('listStoredInListButEscapes', typesTask.dynamicType);

    if (!allocation.contains('filled')) {
      checkType('listUnset', new TypeMask.nonNullEmpty());
      checkType('listOnlySetWithConstraint', new TypeMask.nonNullEmpty());
    }
  }));
}