blob: 8be36a030317b9bf9b182608b64c8f092109c787 [file] [log] [blame]
// 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.
// @dart = 2.9
import 'package:expect/expect.dart';
import 'package:async_helper/async_helper.dart';
import 'dart:async';
main() {
// Unique object.
var baz = new Mimic(new Object());
// Not so unique object that thinks it's the same as baz.
var mimic = new Mimic(baz.original);
// runGuarded calls run, captures the synchronous error (if any) and
// gives that one to handleUncaughtError.
Expect.identical(Zone.root, Zone.current);
// Create a map with various key types.
Map zoneValues = new Map();
zoneValues[#foo] = 499;
zoneValues["bar"] = [];
zoneValues[baz] = "baz";
zoneValues[0] = "zero!";
zoneValues[null] = baz;
Zone forked = Zone.current.fork(zoneValues: zoneValues);
// Values are not present when not inside the zone.
Expect.identical(Zone.root, Zone.current);
Expect.isNull(Zone.current[#foo]);
Expect.isNull(Zone.current["bar"]);
Expect.isNull(Zone.current[baz]);
Expect.isNull(Zone.current[mimic]);
Expect.isNull(Zone.current[0]);
Expect.isNull(Zone.current[null]);
Expect.isNull(Zone.current["qux"]);
// Changing the original map has no effect after the zone is created.
zoneValues[#foo] = -1;
// Values are available directly on the zone.
Expect.equals(499, forked[#foo]);
Expect.listEquals([], forked["bar"]);
Expect.equals("baz", forked[baz]);
Expect.equals("baz", forked[mimic]);
Expect.equals("zero!", forked[0]);
Expect.equals("zero!", forked[0.0]); // Lookup uses equality.
Expect.equals("zero!", forked[-0.0]);
Expect.equals(baz, forked[null]);
Expect.isNull(forked["qux"]);
forked.run(() {
Expect.identical(forked, Zone.current); // Sanity check.
// Values are present on current when inside zone.
Expect.equals(499, Zone.current[#foo]);
Expect.listEquals([], Zone.current["bar"]);
Expect.equals("baz", Zone.current[baz]);
Expect.equals("baz", Zone.current[mimic]);
Expect.equals("zero!", Zone.current[0]);
Expect.equals("zero!", Zone.current[0.0]); // Lookup uses equality.
Expect.equals("zero!", Zone.current[-0.0]);
Expect.equals(baz, Zone.current[null]);
Expect.isNull(Zone.current["qux"]);
});
// Values are still not present when not inside the zone.
Expect.identical(Zone.root, Zone.current);
Expect.isNull(Zone.current[#foo]);
Expect.isNull(Zone.current["bar"]);
Expect.isNull(Zone.current[baz]);
Expect.isNull(Zone.current[mimic]);
Expect.isNull(Zone.current[0]);
Expect.isNull(Zone.current[null]);
Expect.isNull(Zone.current["qux"]);
// Modifying the stored values work as expected.
zoneValues["bar"].add(42);
forked.run(() {
Expect.identical(forked, Zone.current); // Sanity check.
// Values are still there when inside the zone. The list was modified.
Expect.equals(499, Zone.current[#foo]);
Expect.listEquals([42], Zone.current["bar"]);
Expect.equals("baz", Zone.current[baz]);
Expect.equals("baz", Zone.current[mimic]);
Expect.equals("zero!", Zone.current[0]);
Expect.equals(baz, Zone.current[null]);
Expect.isNull(Zone.current["qux"]);
});
// Creating a further nested zone with new values allows keeping, overriding,
// and shadowing existing values from the outer zone.
zoneValues = new Map();
zoneValues[#foo] = -499; // Values can be overridden.
zoneValues["bar"] = null; // Values can be changed to null.
zoneValues["qux"] = 99; // Values can be added
// Overriding with equal, but not identical, key is possible.
zoneValues[mimic] = "floo";
zoneValues[0.0] = "zero!ZERO!";
Zone forkedChild = forked.fork(zoneValues: zoneValues);
// New values available on zone.
Expect.equals(-499, forkedChild[#foo]); // Overridden.
Expect.isNull(forkedChild["bar"]); // Overridden to null.
Expect.equals("floo", forkedChild[baz]); // Overridden by mimic.
Expect.equals("floo", forkedChild[mimic]); // Now recognizes mimic.
Expect.equals("zero!ZERO!", forkedChild[0]); // Overridden by 0.0.
Expect.equals("zero!ZERO!", forkedChild[0.0]); // Overriding 0.
Expect.equals(baz, forkedChild[null]); // Inherited.
Expect.equals(99, forkedChild["qux"]); // Added.
forkedChild.run(() {
Expect.identical(forkedChild, Zone.current); // Sanity check.
// New values available on current zone when the zone is current.
Expect.equals(-499, Zone.current[#foo]); // Overridden.
Expect.isNull(Zone.current["bar"]); // Overridden to null.
Expect.equals("floo", Zone.current[baz]); // Overridden by mimic.
Expect.equals("floo", Zone.current[mimic]); // Now recognizes mimic.
Expect.equals("zero!ZERO!", Zone.current[0]); // Overridden by 0.0.
Expect.equals("zero!ZERO!", Zone.current[0.0]); // Overriding 0.
Expect.equals(baz, Zone.current[null]); // Inherited.
Expect.equals(99, Zone.current["qux"]); // Added.
});
// Parent zone values are unchanged.
Expect.equals(499, forked[#foo]);
Expect.listEquals([42], forked["bar"]);
Expect.equals("baz", forked[baz]);
Expect.equals("baz", forked[mimic]);
Expect.equals("zero!", forked[0]);
Expect.equals("zero!", forked[0.0]); // Lookup uses equality.
Expect.equals("zero!", forked[-0.0]);
Expect.equals(baz, forked[null]);
Expect.isNull(forked["qux"]);
}
// Class of objects that consider themselves equal to their originals.
// Sees through mimickry.
class Mimic {
final Object original;
Mimic(this.original);
int get hashCode => original.hashCode;
bool operator ==(Object other) =>
(other is Mimic) ? this == other.original : original == other;
}