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40e18905f2
Closes https://github.com/dart-lang/sdk/pull/49478 TEST=Manual GitOrigin-RevId: f4c9c6869dfe73639295e86574a021523b3d374d Change-Id: I134a97caed4eec59d70e9cbca16b7e9a472cf2c1 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/251902 Reviewed-by: Michael Thomsen <mit@google.com> Commit-Queue: Alexander Thomas <athom@google.com> Reviewed-by: Aske Simon Christensen <askesc@google.com> Reviewed-by: Kevin Chisholm <kevinjchisholm@google.com> Reviewed-by: Alexander Thomas <athom@google.com>
149 lines
5.7 KiB
Dart
149 lines
5.7 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'package:expect/expect.dart';
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import 'package:async_helper/async_helper.dart';
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import 'dart:async';
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main() {
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// Unique object.
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var baz = new Mimic(new Object());
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// Not so unique object that thinks it's the same as baz.
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var mimic = new Mimic(baz.original);
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// runGuarded calls run, captures the synchronous error (if any) and
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// gives that one to handleUncaughtError.
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Expect.identical(Zone.root, Zone.current);
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// Create a map with various key types.
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Map zoneValues = new Map();
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zoneValues[#foo] = 499;
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zoneValues["bar"] = [];
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zoneValues[baz] = "baz";
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zoneValues[0] = "zero!";
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zoneValues[null] = baz;
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Zone forked = Zone.current.fork(zoneValues: zoneValues);
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// Values are not present when not inside the zone.
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Expect.identical(Zone.root, Zone.current);
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Expect.isNull(Zone.current[#foo]);
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Expect.isNull(Zone.current["bar"]);
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Expect.isNull(Zone.current[baz]);
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Expect.isNull(Zone.current[mimic]);
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Expect.isNull(Zone.current[0]);
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Expect.isNull(Zone.current[null]);
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Expect.isNull(Zone.current["qux"]);
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// Changing the original map has no effect after the zone is created.
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zoneValues[#foo] = -1;
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// Values are available directly on the zone.
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Expect.equals(499, forked[#foo]);
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Expect.listEquals([], forked["bar"]);
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Expect.equals("baz", forked[baz]);
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Expect.equals("baz", forked[mimic]);
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Expect.equals("zero!", forked[0]);
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Expect.equals("zero!", forked[0.0]); // Lookup uses equality.
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Expect.equals("zero!", forked[-0.0]);
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Expect.equals(baz, forked[null]);
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Expect.isNull(forked["qux"]);
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forked.run(() {
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Expect.identical(forked, Zone.current); // Sanity check.
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// Values are present on current when inside zone.
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Expect.equals(499, Zone.current[#foo]);
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Expect.listEquals([], Zone.current["bar"]);
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Expect.equals("baz", Zone.current[baz]);
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Expect.equals("baz", Zone.current[mimic]);
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Expect.equals("zero!", Zone.current[0]);
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Expect.equals("zero!", Zone.current[0.0]); // Lookup uses equality.
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Expect.equals("zero!", Zone.current[-0.0]);
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Expect.equals(baz, Zone.current[null]);
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Expect.isNull(Zone.current["qux"]);
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});
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// Values are still not present when not inside the zone.
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Expect.identical(Zone.root, Zone.current);
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Expect.isNull(Zone.current[#foo]);
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Expect.isNull(Zone.current["bar"]);
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Expect.isNull(Zone.current[baz]);
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Expect.isNull(Zone.current[mimic]);
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Expect.isNull(Zone.current[0]);
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Expect.isNull(Zone.current[null]);
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Expect.isNull(Zone.current["qux"]);
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// Modifying the stored values work as expected.
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zoneValues["bar"].add(42);
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forked.run(() {
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Expect.identical(forked, Zone.current); // Sanity check.
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// Values are still there when inside the zone. The list was modified.
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Expect.equals(499, Zone.current[#foo]);
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Expect.listEquals([42], Zone.current["bar"]);
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Expect.equals("baz", Zone.current[baz]);
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Expect.equals("baz", Zone.current[mimic]);
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Expect.equals("zero!", Zone.current[0]);
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Expect.equals(baz, Zone.current[null]);
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Expect.isNull(Zone.current["qux"]);
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});
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// Creating a further nested zone with new values allows keeping, overriding,
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// and shadowing existing values from the outer zone.
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zoneValues = new Map();
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zoneValues[#foo] = -499; // Values can be overridden.
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zoneValues["bar"] = null; // Values can be changed to null.
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zoneValues["qux"] = 99; // Values can be added
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// Overriding with equal, but not identical, key is possible.
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zoneValues[mimic] = "floo";
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zoneValues[0.0] = "zero!ZERO!";
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Zone forkedChild = forked.fork(zoneValues: zoneValues);
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// New values available on zone.
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Expect.equals(-499, forkedChild[#foo]); // Overridden.
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Expect.isNull(forkedChild["bar"]); // Overridden to null.
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Expect.equals("floo", forkedChild[baz]); // Overridden by mimic.
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Expect.equals("floo", forkedChild[mimic]); // Now recognizes mimic.
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Expect.equals("zero!ZERO!", forkedChild[0]); // Overridden by 0.0.
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Expect.equals("zero!ZERO!", forkedChild[0.0]); // Overriding 0.
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Expect.equals(baz, forkedChild[null]); // Inherited.
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Expect.equals(99, forkedChild["qux"]); // Added.
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forkedChild.run(() {
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Expect.identical(forkedChild, Zone.current); // Sanity check.
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// New values available on current zone when the zone is current.
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Expect.equals(-499, Zone.current[#foo]); // Overridden.
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Expect.isNull(Zone.current["bar"]); // Overridden to null.
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Expect.equals("floo", Zone.current[baz]); // Overridden by mimic.
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Expect.equals("floo", Zone.current[mimic]); // Now recognizes mimic.
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Expect.equals("zero!ZERO!", Zone.current[0]); // Overridden by 0.0.
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Expect.equals("zero!ZERO!", Zone.current[0.0]); // Overriding 0.
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Expect.equals(baz, Zone.current[null]); // Inherited.
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Expect.equals(99, Zone.current["qux"]); // Added.
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});
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// Parent zone values are unchanged.
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Expect.equals(499, forked[#foo]);
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Expect.listEquals([42], forked["bar"]);
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Expect.equals("baz", forked[baz]);
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Expect.equals("baz", forked[mimic]);
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Expect.equals("zero!", forked[0]);
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Expect.equals("zero!", forked[0.0]); // Lookup uses equality.
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Expect.equals("zero!", forked[-0.0]);
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Expect.equals(baz, forked[null]);
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Expect.isNull(forked["qux"]);
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}
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// Class of objects that consider themselves equal to their originals.
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// Sees through mimicry.
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class Mimic {
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final Object original;
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Mimic(this.original);
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int get hashCode => original.hashCode;
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bool operator ==(Object other) =>
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(other is Mimic) ? this == other.original : original == other;
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}
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