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// Copyright (c) 2011, 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 map_test;
import "package:expect/expect.dart";
import 'dart:collection';
import 'dart:convert' show json;
Map<String, dynamic> newJsonMap() => json.decode('{}');
Map<String, dynamic> newJsonMapCustomReviver() =>
json.decode('{}', reviver: (key, value) => value);
void main() {
test(new HashMap());
test(new LinkedHashMap());
test(new SplayTreeMap());
test(new SplayTreeMap(Comparable.compare));
test(new MapView(new HashMap()));
test(new MapView(new SplayTreeMap()));
test(new MapBaseMap());
test(new MapMixinMap());
test(newJsonMap());
test(newJsonMapCustomReviver());
testLinkedHashMap();
testMapLiteral();
testNullValue();
testTypes();
testUnmodifiableMaps();
testWeirdStringKeys(new Map());
testWeirdStringKeys(new Map<String, String>());
testWeirdStringKeys(new HashMap());
testWeirdStringKeys(new HashMap<String, String>());
testWeirdStringKeys(new LinkedHashMap());
testWeirdStringKeys(new LinkedHashMap<String, String>());
testWeirdStringKeys(new SplayTreeMap());
testWeirdStringKeys(new SplayTreeMap<String, String>());
testWeirdStringKeys(new MapBaseMap<String, String>());
testWeirdStringKeys(new MapMixinMap<String, String>());
testWeirdStringKeys(newJsonMap());
testWeirdStringKeys(newJsonMapCustomReviver());
testNumericKeys(new Map());
testNumericKeys(new Map<num, String>());
testNumericKeys(new HashMap());
testNumericKeys(new HashMap<num, String>());
testNumericKeys(new HashMap.identity());
testNumericKeys(new HashMap<num, String>.identity());
testNumericKeys(new LinkedHashMap());
testNumericKeys(new LinkedHashMap<num, String>());
testNumericKeys(new LinkedHashMap.identity());
testNumericKeys(new LinkedHashMap<num, String>.identity());
testNumericKeys(new MapBaseMap<num, String>());
testNumericKeys(new MapMixinMap<num, String>());
// NaN maps need to have nullable value types because the forEach method
// cannot look up the value and therefore might find `null` instead of the
// actuall value. See MapMixin.forEach in dart:collection/maps.dart
testNaNKeys(new Map());
testNaNKeys(new Map<num, String?>());
testNaNKeys(new HashMap());
testNaNKeys(new HashMap<num, String?>());
testNaNKeys(new LinkedHashMap());
testNaNKeys(new LinkedHashMap<num, String?>());
testNaNKeys(new MapBaseMap<num, String?>());
testNaNKeys(new MapMixinMap<num, String?>());
// Identity maps fail the NaN-keys tests because the test assumes that
// NaN is not equal to NaN.
testIdentityMap(new Map.identity());
testIdentityMap(new HashMap.identity());
testIdentityMap(new LinkedHashMap.identity());
testIdentityMap(new HashMap(equals: identical, hashCode: identityHashCode));
testIdentityMap(
new LinkedHashMap(equals: identical, hashCode: identityHashCode));
testIdentityMap(new HashMap(
equals: (x, y) => identical(x, y), hashCode: (x) => identityHashCode(x)));
testIdentityMap(new LinkedHashMap(
equals: (x, y) => identical(x, y), hashCode: (x) => identityHashCode(x)));
testCustomMap(new HashMap(
equals: myEquals,
hashCode: myHashCode,
isValidKey: (v) => v is Customer));
testCustomMap(new LinkedHashMap(
equals: myEquals,
hashCode: myHashCode,
isValidKey: (v) => v is Customer));
testCustomMap(
new HashMap<Customer, dynamic>(equals: myEquals, hashCode: myHashCode));
testCustomMap(new LinkedHashMap<Customer, dynamic>(
equals: myEquals, hashCode: myHashCode));
testIterationOrder(new LinkedHashMap());
testIterationOrder(new LinkedHashMap.identity());
testIterationOrder(newJsonMap());
testIterationOrder(newJsonMapCustomReviver());
testOtherKeys(new SplayTreeMap<int, int>());
testOtherKeys(
new SplayTreeMap<int, int>((int a, int b) => a - b, (v) => v is int));
testOtherKeys(new SplayTreeMap((int a, int b) => a - b, (v) => v is int));
testOtherKeys(new HashMap<int, int>());
testOtherKeys(new HashMap<int, int>.identity());
testOtherKeys(new HashMap<int, int>(
hashCode: (v) => v.hashCode, isValidKey: (v) => v is int));
testOtherKeys(new HashMap(
equals: (int x, int y) => x == y,
hashCode: (int v) => v.hashCode,
isValidKey: (v) => v is int));
testOtherKeys(new LinkedHashMap<int, int>());
testOtherKeys(new LinkedHashMap<int, int>.identity());
testOtherKeys(new LinkedHashMap<int, int>(
hashCode: (v) => v.hashCode, isValidKey: (v) => v is int));
testOtherKeys(new LinkedHashMap(
equals: (int x, int y) => x == y,
hashCode: (int v) => v.hashCode,
isValidKey: (v) => v is int));
testOtherKeys(new MapBaseMap<int, int>());
testOtherKeys(new MapMixinMap<int, int>());
testUnmodifiableMap(const {1: 37});
testUnmodifiableMap(new UnmodifiableMapView({1: 37}));
testUnmodifiableMap(new UnmodifiableMapBaseMap([1, 37]));
testTypeAnnotations(new HashMap());
testTypeAnnotations(new LinkedHashMap());
testTypeAnnotations(new HashMap(equals: identical));
testTypeAnnotations(new LinkedHashMap(equals: identical));
testTypeAnnotations(new HashMap(
equals: (int a, int b) => a == b,
hashCode: (int a) => a.hashCode,
isValidKey: (a) => a is int));
testTypeAnnotations(new LinkedHashMap(
equals: (int a, int b) => a == b,
hashCode: (int a) => a.hashCode,
isValidKey: (a) => a is int));
testFrom();
}
void test<K, V>(Map<K, V> map) {
testDeletedElement(map);
if (map is Map<int, dynamic>) {
testMap(map, 1, 2, 3, 4, 5, 6, 7, 8);
} else {
map.clear();
testMap(map, "value1", "value2", "value3", "value4", "value5", "value6",
"value7", "value8");
}
}
void testLinkedHashMap() {
LinkedHashMap map = new LinkedHashMap();
Expect.isFalse(map.containsKey(1));
map[1] = 1;
map[1] = 2;
testLength(1, map);
}
void testMap<K, V>(
Map<K, V> typedMap, key1, key2, key3, key4, key5, key6, key7, key8) {
dynamic map = typedMap;
int value1 = 10;
int value2 = 20;
int value3 = 30;
int value4 = 40;
int value5 = 50;
int value6 = 60;
int value7 = 70;
int value8 = 80;
testLength(0, map);
map[key1] = value1;
Expect.equals(value1, map[key1]);
map[key1] = value2;
Expect.isFalse(map.containsKey(key2));
testLength(1, map);
map[key1] = value1;
Expect.equals(value1, map[key1]);
// Add enough entries to make sure the table grows.
map[key2] = value2;
Expect.equals(value2, map[key2]);
testLength(2, map);
map[key3] = value3;
Expect.equals(value2, map[key2]);
Expect.equals(value3, map[key3]);
map[key4] = value4;
Expect.equals(value3, map[key3]);
Expect.equals(value4, map[key4]);
map[key5] = value5;
Expect.equals(value4, map[key4]);
Expect.equals(value5, map[key5]);
map[key6] = value6;
Expect.equals(value5, map[key5]);
Expect.equals(value6, map[key6]);
map[key7] = value7;
Expect.equals(value6, map[key6]);
Expect.equals(value7, map[key7]);
map[key8] = value8;
Expect.equals(value1, map[key1]);
Expect.equals(value2, map[key2]);
Expect.equals(value3, map[key3]);
Expect.equals(value4, map[key4]);
Expect.equals(value5, map[key5]);
Expect.equals(value6, map[key6]);
Expect.equals(value7, map[key7]);
Expect.equals(value8, map[key8]);
testLength(8, map);
map.remove(key4);
Expect.isFalse(map.containsKey(key4));
testLength(7, map);
// Test clearing the table.
map.clear();
testLength(0, map);
Expect.isFalse(map.containsKey(key1));
Expect.isFalse(map.containsKey(key2));
Expect.isFalse(map.containsKey(key3));
Expect.isFalse(map.containsKey(key4));
Expect.isFalse(map.containsKey(key5));
Expect.isFalse(map.containsKey(key6));
Expect.isFalse(map.containsKey(key7));
Expect.isFalse(map.containsKey(key8));
// Test adding and removing again.
map[key1] = value1;
Expect.equals(value1, map[key1]);
testLength(1, map);
map[key2] = value2;
Expect.equals(value2, map[key2]);
testLength(2, map);
map[key3] = value3;
Expect.equals(value3, map[key3]);
map.remove(key3);
testLength(2, map);
map[key4] = value4;
Expect.equals(value4, map[key4]);
map.remove(key4);
testLength(2, map);
map[key5] = value5;
Expect.equals(value5, map[key5]);
map.remove(key5);
testLength(2, map);
map[key6] = value6;
Expect.equals(value6, map[key6]);
map.remove(key6);
testLength(2, map);
map[key7] = value7;
Expect.equals(value7, map[key7]);
map.remove(key7);
testLength(2, map);
map[key8] = value8;
Expect.equals(value8, map[key8]);
map.remove(key8);
testLength(2, map);
Expect.isTrue(map.containsKey(key1));
Expect.isTrue(map.containsValue(value1));
// Test Map.forEach.
Map otherMap = new Map<K, V>();
void testForEachMap(key, value) {
otherMap[key] = value;
}
map.forEach(testForEachMap);
Expect.isTrue(otherMap.containsKey(key1));
Expect.isTrue(otherMap.containsKey(key2));
Expect.isTrue(otherMap.containsValue(value1));
Expect.isTrue(otherMap.containsValue(value2));
Expect.equals(2, otherMap.length);
otherMap.clear();
Expect.equals(0, otherMap.length);
// Test Collection.keys.
void testForEachKey(key) {
otherMap[key] = null;
}
Iterable keys = map.keys;
keys.forEach(testForEachKey);
Expect.isTrue(otherMap.containsKey(key1));
Expect.isTrue(otherMap.containsKey(key2));
Expect.isFalse(otherMap.containsKey(value1));
Expect.isFalse(otherMap.containsKey(value2));
Expect.isTrue(otherMap.containsValue(null));
Expect.isFalse(otherMap.containsValue(value1));
Expect.isFalse(otherMap.containsValue(value2));
Expect.equals(2, otherMap.length);
otherMap.clear();
Expect.equals(0, otherMap.length);
// Test Collection.values.
void testForEachValue(value) {
if (value == value1) {
otherMap[key1] = value;
} else if (value == value2) {
otherMap[key2] = value;
} else {
otherMap[key3] = null;
}
}
Iterable values = map.values;
values.forEach(testForEachValue);
Expect.isTrue(otherMap.containsKey(key1));
Expect.isTrue(otherMap.containsKey(key2));
Expect.isFalse(otherMap.containsKey(value1));
Expect.isFalse(otherMap.containsKey(value2));
Expect.isTrue(otherMap.containsValue(value1));
Expect.isTrue(otherMap.containsValue(value2));
Expect.isFalse(otherMap.containsValue(value3));
Expect.isFalse(otherMap.containsValue(key1));
Expect.isFalse(otherMap.containsValue(null));
Expect.equals(2, otherMap.length);
otherMap.clear();
Expect.equals(0, otherMap.length);
// Test Map.putIfAbsent.
map.clear();
Expect.isFalse(map.containsKey(key1));
map.putIfAbsent(key1, () => 10);
Expect.isTrue(map.containsKey(key1));
Expect.equals(10, map[key1]);
Expect.equals(10, map.putIfAbsent(key1, () => 11));
// Test Map.addAll.
map.clear();
otherMap.clear();
otherMap['99'] = 1;
otherMap['50'] = 50;
otherMap['1'] = 99;
map.addAll(otherMap);
Expect.equals(3, map.length);
Expect.equals(1, map['99']);
Expect.equals(50, map['50']);
Expect.equals(99, map['1']);
otherMap['50'] = 42;
map.addAll(new HashMap<K, V>.from(otherMap));
Expect.equals(3, map.length);
Expect.equals(1, map['99']);
Expect.equals(42, map['50']);
Expect.equals(99, map['1']);
otherMap['99'] = 7;
map.addAll(new SplayTreeMap<K, V>.from(otherMap));
Expect.equals(3, map.length);
Expect.equals(7, map['99']);
Expect.equals(42, map['50']);
Expect.equals(99, map['1']);
otherMap.remove('99');
map['99'] = 0;
map.addAll(otherMap);
Expect.equals(3, map.length);
Expect.equals(0, map['99']);
Expect.equals(42, map['50']);
Expect.equals(99, map['1']);
map.clear();
otherMap.clear();
map.addAll(otherMap);
Expect.equals(0, map.length);
}
void testDeletedElement(Map map) {
map.clear();
for (int i = 0; i < 100; i++) {
map['1'] = 2;
testLength(1, map);
map.remove('1');
testLength(0, map);
}
testLength(0, map);
}
void testMapLiteral() {
var m = {"a": 1, "b": 2, "c": 3};
Expect.equals(3, m.length);
int sum = 0;
m.forEach((a, b) {
sum += b;
});
Expect.equals(6, sum);
List values = m.keys.toList();
Expect.equals(3, values.length);
String first = values[0];
String second = values[1];
String third = values[2];
String all = "${first}${second}${third}";
Expect.equals(3, all.length);
Expect.isTrue(all.contains("a", 0));
Expect.isTrue(all.contains("b", 0));
Expect.isTrue(all.contains("c", 0));
}
void testNullValue() {
Map m = {"a": 1, "b": null, "c": 3};
Expect.equals(null, m["b"]);
Expect.isTrue(m.containsKey("b"));
Expect.equals(3, m.length);
m["a"] = null;
m["c"] = null;
Expect.equals(null, m["a"]);
Expect.isTrue(m.containsKey("a"));
Expect.equals(null, m["c"]);
Expect.isTrue(m.containsKey("c"));
Expect.equals(3, m.length);
m.remove("a");
Expect.equals(2, m.length);
Expect.equals(null, m["a"]);
Expect.isFalse(m.containsKey("a"));
}
void testTypes() {
testMap(Map<num, String> map) {
Expect.isTrue(map is Map<num, String>);
Expect.isTrue(map is! Map<String, dynamic>);
Expect.isTrue(map is! Map<dynamic, int>);
// Use with properly typed keys and values.
map[42] = "text1";
map[43] = "text2";
map[42] = "text3";
Expect.equals("text3", map.remove(42));
Expect.equals(null, map[42]);
map[42] = "text4";
// Ensure that "containsKey", "containsValue" and "remove"
// accepts any object.
for (var object in [true, null, new Object()]) {
Expect.isFalse(map.containsKey(object));
Expect.isFalse(map.containsValue(object));
Expect.isNull(map.remove(object));
Expect.isNull(map[object]);
}
}
testMap(new HashMap<int, String>());
testMap(new LinkedHashMap<int, String>());
testMap(new SplayTreeMap<int, String>());
testMap(new SplayTreeMap<int, String>(Comparable.compare));
testMap(new SplayTreeMap<int, String>((int a, int b) => a.compareTo(b)));
testMap(new HashMap<num, String>());
testMap(new LinkedHashMap<num, String>());
testMap(new SplayTreeMap<num, String>());
testMap(new SplayTreeMap<num, String>(Comparable.compare));
testMap(new SplayTreeMap<num, String>((num a, num b) => a.compareTo(b)));
}
void testWeirdStringKeys(Map map) {
// Test weird keys.
var weirdKeys = const [
'hasOwnProperty',
'constructor',
'toLocaleString',
'propertyIsEnumerable',
'__defineGetter__',
'__defineSetter__',
'__lookupGetter__',
'__lookupSetter__',
'isPrototypeOf',
'toString',
'valueOf',
'__proto__',
'__count__',
'__parent__',
''
];
Expect.isTrue(map.isEmpty);
for (var key in weirdKeys) {
Expect.isFalse(map.containsKey(key));
Expect.equals(null, map[key]);
var value = 'value:$key';
map[key] = value;
Expect.isTrue(map.containsKey(key));
Expect.equals(value, map[key]);
Expect.equals(value, map.remove(key));
Expect.isFalse(map.containsKey(key));
Expect.equals(null, map[key]);
}
Expect.isTrue(map.isEmpty);
}
void testNumericKeys(Map map) {
var numericKeys = const [
double.infinity,
double.negativeInfinity,
0,
0.0,
-0.0
];
Expect.isTrue(map.isEmpty);
for (var key in numericKeys) {
Expect.isFalse(map.containsKey(key));
Expect.equals(null, map[key]);
var value = 'value:$key';
map[key] = value;
Expect.isTrue(map.containsKey(key));
Expect.equals(value, map[key]);
Expect.equals(value, map.remove(key));
Expect.isFalse(map.containsKey(key));
Expect.equals(null, map[key]);
}
Expect.isTrue(map.isEmpty);
}
void testNaNKeys(Map map) {
Object nan = double.nan;
// Skip this test on platforms that use native-JS NaN semantics for speed.
if (!identical(nan, nan)) return;
Expect.isTrue(map.isEmpty);
// Test NaN.
Expect.isFalse(map.containsKey(nan));
Expect.equals(null, map[nan]);
map[nan] = 'value:0';
Expect.isFalse(map.containsKey(nan));
Expect.equals(null, map[nan]);
testLength(1, map);
map[nan] = 'value:1';
Expect.isFalse(map.containsKey(nan));
Expect.equals(null, map[nan]);
testLength(2, map);
Expect.equals(null, map.remove(nan));
testLength(2, map);
var count = 0;
map.forEach((key, value) {
if (key.isNaN) count++;
});
Expect.equals(2, count);
map.clear();
Expect.isTrue(map.isEmpty);
}
void testLength(int length, Map map) {
Expect.equals(length, map.length);
Expect.equals(length, map.keys.length);
Expect.equals(length, map.values.length);
// Check being-empty.
var ifEmpty = (length == 0) ? Expect.isTrue : Expect.isFalse;
var ifNotEmpty = (length != 0) ? Expect.isTrue : Expect.isFalse;
ifEmpty(map.isEmpty);
ifNotEmpty(map.isNotEmpty);
ifEmpty(map.keys.isEmpty);
ifNotEmpty(map.keys.isNotEmpty);
ifEmpty(map.values.isEmpty);
ifNotEmpty(map.values.isNotEmpty);
// Test key/value iterators match their isEmpty/isNotEmpty.
ifNotEmpty(map.keys.iterator.moveNext());
ifNotEmpty(map.values.iterator.moveNext());
if (length == 0) {
for (var k in map.keys) Expect.fail("contains key when iterating: $k");
for (var v in map.values) Expect.fail("contains values when iterating: $v");
}
}
testIdentityMap<K, V>(Map<K, V> typedMap) {
Map map = typedMap;
Expect.isTrue(map.isEmpty);
var nan = double.nan;
// TODO(11551): Remove guard when dart2js makes identical(NaN, NaN) true.
if (identical(nan, nan)) {
map[nan] = 42;
testLength(1, map);
Expect.isTrue(map.containsKey(nan));
Expect.equals(42, map[nan]);
map[nan] = 37;
testLength(1, map);
Expect.equals(37, map[nan]);
Expect.equals(37, map.remove(nan));
testLength(0, map);
}
Vampire v1 = const Vampire(1);
Vampire v2 = const Vampire(2);
Expect.isFalse(v1 == v1);
Expect.isFalse(v2 == v2);
Expect.isTrue(v2 == v1); // Snob!
map[v1] = 1;
map[v2] = 2;
testLength(2, map);
Expect.isTrue(map.containsKey(v1));
Expect.isTrue(map.containsKey(v2));
Expect.equals(1, map[v1]);
Expect.equals(2, map[v2]);
Expect.equals(1, map.remove(v1));
testLength(1, map);
Expect.isFalse(map.containsKey(v1));
Expect.isTrue(map.containsKey(v2));
Expect.isNull(map.remove(v1));
Expect.equals(2, map.remove(v2));
testLength(0, map);
var eq01 = new Equalizer(0);
var eq02 = new Equalizer(0);
var eq11 = new Equalizer(1);
var eq12 = new Equalizer(1);
// Sanity.
Expect.equals(eq01, eq02);
Expect.equals(eq02, eq01);
Expect.equals(eq11, eq12);
Expect.equals(eq12, eq11);
Expect.notEquals(eq01, eq11);
Expect.notEquals(eq01, eq12);
Expect.notEquals(eq02, eq11);
Expect.notEquals(eq02, eq12);
Expect.notEquals(eq11, eq01);
Expect.notEquals(eq11, eq02);
Expect.notEquals(eq12, eq01);
Expect.notEquals(eq12, eq02);
map[eq01] = 0;
map[eq02] = 1;
map[eq11] = 2;
map[eq12] = 3;
testLength(4, map);
Expect.equals(0, map[eq01]);
Expect.equals(1, map[eq02]);
Expect.equals(2, map[eq11]);
Expect.equals(3, map[eq12]);
Expect.isTrue(map.containsKey(eq01));
Expect.isTrue(map.containsKey(eq02));
Expect.isTrue(map.containsKey(eq11));
Expect.isTrue(map.containsKey(eq12));
Expect.equals(1, map.remove(eq02));
Expect.equals(3, map.remove(eq12));
testLength(2, map);
Expect.isTrue(map.containsKey(eq01));
Expect.isFalse(map.containsKey(eq02));
Expect.isTrue(map.containsKey(eq11));
Expect.isFalse(map.containsKey(eq12));
Expect.equals(0, map[eq01]);
Expect.equals(null, map[eq02]);
Expect.equals(2, map[eq11]);
Expect.equals(null, map[eq12]);
Expect.equals(0, map.remove(eq01));
Expect.equals(2, map.remove(eq11));
testLength(0, map);
map[eq01] = 0;
map[eq02] = 1;
map[eq11] = 2;
map[eq12] = 3;
testLength(4, map);
// Transfer to equality-based map will collapse elements.
Map eqMap = new HashMap<K, V>();
eqMap.addAll(map);
testLength(2, eqMap);
Expect.isTrue(eqMap.containsKey(eq01));
Expect.isTrue(eqMap.containsKey(eq02));
Expect.isTrue(eqMap.containsKey(eq11));
Expect.isTrue(eqMap.containsKey(eq12));
// Changing objects will not affect identity map.
map.clear();
var m1 = new Mutable(1);
var m2 = new Mutable(2);
var m3 = new Mutable(3);
map[m1] = 1;
map[m2] = 2;
map[m3] = 3;
Expect.equals(3, map.length);
Expect.isTrue(map.containsKey(m1));
Expect.isTrue(map.containsKey(m2));
Expect.isTrue(map.containsKey(m3));
Expect.notEquals(m1, m3);
m3.id = 1;
Expect.equals(m1, m3);
// Even if keys are equal, they are still not identical.
// Even if hashcode of m3 changed, it can still be found.
Expect.equals(1, map[m1]);
Expect.equals(3, map[m3]);
}
/** Class of objects that are equal if they hold the same id. */
class Equalizer {
int id;
Equalizer(this.id);
int get hashCode => id;
bool operator ==(Object other) => other is Equalizer && id == other.id;
}
/**
* Objects that are not reflexive.
*
* They think they are better than their equals.
*/
class Vampire {
final int generation;
const Vampire(this.generation);
int get hashCode => generation;
// The double-fang operator falsely claims that a vampire is equal to
// any of its sire's generation.
bool operator ==(Object other) =>
other is Vampire && generation - 1 == other.generation;
}
void testCustomMap<K, V>(Map<K, V> typedMap) {
Map map = typedMap;
testLength(0, map);
var c11 = const Customer(1, 1);
var c12 = const Customer(1, 2);
var c21 = const Customer(2, 1);
var c22 = const Customer(2, 2);
// Sanity.
Expect.equals(c11, c12);
Expect.notEquals(c11, c21);
Expect.notEquals(c11, c22);
Expect.equals(c21, c22);
Expect.notEquals(c21, c11);
Expect.notEquals(c21, c12);
Expect.isTrue(myEquals(c11, c21));
Expect.isFalse(myEquals(c11, c12));
Expect.isFalse(myEquals(c11, c22));
Expect.isTrue(myEquals(c12, c22));
Expect.isFalse(myEquals(c12, c11));
Expect.isFalse(myEquals(c12, c21));
map[c11] = 42;
testLength(1, map);
Expect.isTrue(map.containsKey(c11));
Expect.isTrue(map.containsKey(c21));
Expect.isFalse(map.containsKey(c12));
Expect.isFalse(map.containsKey(c22));
Expect.equals(42, map[c11]);
Expect.equals(42, map[c21]);
map[c21] = 37;
testLength(1, map);
Expect.isTrue(map.containsKey(c11));
Expect.isTrue(map.containsKey(c21));
Expect.isFalse(map.containsKey(c12));
Expect.isFalse(map.containsKey(c22));
Expect.equals(37, map[c11]);
Expect.equals(37, map[c21]);
map[c22] = 42;
testLength(2, map);
Expect.isTrue(map.containsKey(c11));
Expect.isTrue(map.containsKey(c21));
Expect.isTrue(map.containsKey(c12));
Expect.isTrue(map.containsKey(c22));
Expect.equals(37, map[c11]);
Expect.equals(37, map[c21]);
Expect.equals(42, map[c12]);
Expect.equals(42, map[c22]);
Expect.equals(42, map.remove(c12));
testLength(1, map);
Expect.isTrue(map.containsKey(c11));
Expect.isTrue(map.containsKey(c21));
Expect.isFalse(map.containsKey(c12));
Expect.isFalse(map.containsKey(c22));
Expect.equals(37, map[c11]);
Expect.equals(37, map[c21]);
Expect.equals(37, map.remove(c11));
testLength(0, map);
}
void testUnmodifiableMap(Map map) {
Expect.isTrue(map.containsKey(1));
testLength(1, map);
Expect.equals(1, map.keys.first);
Expect.equals(37, map.values.first);
Expect.throws(map.clear);
Expect.throws(() {
map.remove(1);
});
Expect.throws(() {
map[2] = 42;
});
Expect.throws(() {
map.addAll({2: 42});
});
}
class Customer {
final int id;
final int secondId;
const Customer(this.id, this.secondId);
int get hashCode => id;
bool operator ==(Object other) {
if (other is! Customer) return false;
Customer otherCustomer = other;
return id == otherCustomer.id;
}
}
int myHashCode(Customer c) => c.secondId;
bool myEquals(Customer a, Customer b) => a.secondId == b.secondId;
void testIterationOrder(Map map) {
var order = ['0', '6', '4', '2', '7', '9', '7', '1', '2', '5', '3'];
for (int i = 0; i < order.length; i++) map[order[i]] = i;
Expect.listEquals(
map.keys.toList(), ['0', '6', '4', '2', '7', '9', '1', '5', '3']);
Expect.listEquals(map.values.toList(), [0, 1, 2, 8, 6, 5, 7, 9, 10]);
}
void testOtherKeys(Map<int, int> map) {
// Test that non-int keys are allowed in containsKey/remove/lookup.
// Custom hash sets and tree sets must be constructed so they don't
// use the equality/comparator on incompatible objects.
// This should not throw in either checked or unchecked mode.
Expect.isFalse(map.containsKey("not an int"));
Expect.isFalse(map.containsKey(1.5));
Expect.isNull(map.remove("not an int"));
Expect.isNull(map.remove(1.5));
Expect.isNull(map["not an int"]);
Expect.isNull(map[1.5]);
}
class Mutable {
int id;
Mutable(this.id);
int get hashCode => id;
bool operator ==(other) => other is Mutable && other.id == id;
}
// Slow implementation of Map based on MapBase.
abstract class MapBaseOperations<K, V> {
final List _keys = <K>[];
final List _values = <V>[];
int _modCount = 0;
V? operator [](Object? key) {
int index = _keys.indexOf(key);
if (index < 0) return null;
return _values[index];
}
Iterable<K> get keys => new TestKeyIterable<K>(this);
void operator []=(K key, V value) {
int index = _keys.indexOf(key);
if (index >= 0) {
_values[index] = value;
} else {
_modCount++;
_keys.add(key);
_values.add(value);
}
}
V? remove(Object? key) {
int index = _keys.indexOf(key);
if (index >= 0) {
var result = _values[index];
key = _keys.removeLast();
var value = _values.removeLast();
if (index != _keys.length) {
_keys[index] = key;
_values[index] = value;
}
_modCount++;
return result;
}
return null;
}
void clear() {
// Clear cannot be based on remove, since remove won't remove keys that
// are not equal to themselves. It will fail the testNaNKeys test.
_keys.clear();
_values.clear();
_modCount++;
}
}
class MapBaseMap<K, V> = MapBase<K, V> with MapBaseOperations<K, V>;
class MapMixinMap<K, V> = MapBaseOperations<K, V> with MapMixin<K, V>;
class TestKeyIterable<K> extends IterableBase<K> {
final _map;
TestKeyIterable(this._map);
int get length => _map._keys.length;
Iterator<K> get iterator => new TestKeyIterator<K>(_map);
}
class TestKeyIterator<K> implements Iterator<K> {
final _map;
final int _modCount;
int _index = 0;
var _current;
TestKeyIterator(map)
: _map = map,
_modCount = map._modCount;
bool moveNext() {
if (_modCount != _map._modCount) {
throw new ConcurrentModificationError(_map);
}
if (_index == _map._keys.length) {
_current = null;
return false;
}
_current = _map._keys[_index++];
return true;
}
K get current => _current;
}
// Slow implementation of Map based on MapBase.
class UnmodifiableMapBaseMap<K, V> extends UnmodifiableMapBase<K, V> {
final List<K> _keys = [];
final List<V> _values = [];
UnmodifiableMapBaseMap(List pairs) {
for (int i = 0; i < pairs.length; i += 2) {
_keys.add(pairs[i]);
_values.add(pairs[i + 1]);
}
}
int get _modCount => 0;
V? operator [](Object? key) {
int index = _keys.indexOf(key as K);
if (index < 0) return null;
return _values[index];
}
Iterable<K> get keys => _keys.skip(0);
}
abstract class Super implements Comparable {}
abstract class Interface implements Comparable {}
class Sub extends Super implements Interface, Comparable {
int compareTo(dynamic other) => 0;
int get hashCode => 0;
bool operator ==(other) => other is Sub;
}
expectMap(Map expect, Map actual) {
Expect.equals(expect.length, actual.length, "length");
for (var key in expect.keys) {
Expect.isTrue(actual.containsKey(key), "containsKey $key");
Expect.equals(expect[key], actual[key]);
}
}
void testFrom() {
// Check contents.
for (var map in [
{},
{1: 1},
{1: 2, 3: 4, 5: 6, 7: 8}
]) {
expectMap(map, new Map.from(map));
expectMap(map, new HashMap.from(map));
expectMap(map, new LinkedHashMap.from(map));
expectMap(map, new SplayTreeMap.from(map));
}
// Test type combinations allowed.
Map<int, int> intMap = <int, int>{1: 2, 3: 4};
Map<num, num> numMap = <num, num>{1: 2, 3: 4};
expectMap(intMap, new Map<int, int>.from(numMap));
expectMap(intMap, new Map<num, num>.from(intMap));
expectMap(intMap, new HashMap<int, int>.from(numMap));
expectMap(intMap, new HashMap<num, num>.from(intMap));
expectMap(intMap, new LinkedHashMap<int, int>.from(numMap));
expectMap(intMap, new LinkedHashMap<num, num>.from(intMap));
expectMap(intMap, new SplayTreeMap<int, int>.from(numMap));
expectMap(intMap, new SplayTreeMap<num, num>.from(intMap));
var sub = new Sub();
Map<Super, Super> superMap = <Super, Super>{sub: sub};
Map<Interface, Interface> interfaceMap = <Interface, Interface>{sub: sub};
expectMap(superMap, new Map<Super, Super>.from(interfaceMap));
expectMap(superMap, new Map<Interface, Interface>.from(superMap));
expectMap(superMap, new HashMap<Super, Super>.from(interfaceMap));
expectMap(superMap, new HashMap<Interface, Interface>.from(superMap));
expectMap(superMap, new LinkedHashMap<Super, Super>.from(interfaceMap));
expectMap(superMap, new LinkedHashMap<Interface, Interface>.from(superMap));
expectMap(superMap, new SplayTreeMap<Super, Super>.from(interfaceMap));
expectMap(superMap, new SplayTreeMap<Interface, Interface>.from(superMap));
}
void testTypeAnnotations(Map<int, int> map) {
map[0] = 100;
map[999] = 101;
map[0x800000000] = 102;
map[0x20000000000000] = 103;
Expect.isFalse(map.containsKey("not an it"));
Expect.isNull(map.remove("not an it"));
testLength(4, map);
Expect.equals(101, map.remove(999));
testLength(3, map);
Expect.equals(102, map.remove(0x800000000));
testLength(2, map);
Expect.equals(103, map.remove(0x20000000000000));
testLength(1, map);
}
void testUnmodifiableMaps() {
void checkUnmodifiable(Map<int, int> map) {
Expect.throws(() => map[0] = 0);
Expect.throws(() => map.addAll({0: 0}));
Expect.throws(() => map.addEntries({0: 0}.entries));
Expect.throws(() => map.clear());
Expect.throws(() => map.putIfAbsent(0, () => 0));
Expect.throws(() => map.remove(0));
Expect.throws(() => map.removeWhere((k, v) => true));
Expect.throws(() => map.update(0, (v) => v, ifAbsent: () => 0));
Expect.throws(() => map.updateAll((k, v) => v));
}
checkUnmodifiable(const {1: 1});
checkUnmodifiable(Map.unmodifiable({1: 1}));
checkUnmodifiable(UnmodifiableMapView({1: 1}));
checkUnmodifiable(const MapView({1: 1}));
}