Update the Angular/DI tests to latest from github.

third_party/pkg/angular/lib/change_detection/change_detection.dart

+library change_detection;
+
+typedef EvalExceptionHandler(error, stack);
+
+/**
+ * An interface for [ChangeDetectorGroup] groups related watches together. It
+ * guarantees that within the group all watches will be reported in the order in
+ * which they were registered. It also provides an efficient way of removing the
+ * watch group.
+ */
+abstract class ChangeDetectorGroup<H> {
+  /**
+   * Watch a specific [field] on an [object].
+   *
+   * If the [field] is:
+   *   - _name_ - Name of the property to watch. (If the [object] is a Map then
+   *   treat the name as a key.)
+   *   - _[]_ - Watch all items in an array.
+   *   - _{}_ - Watch all items in a Map.
+   *   - _._ - Watch the actual object identity.
+   *
+   *
+   * Parameters:
+   * - [object] to watch.
+   * - [field] to watch on the [object].
+   * - [handler] an opaque object passed on to [ChangeRecord].
+   */
+  WatchRecord<H> watch(Object object, String field, H handler);
+
+  /** Use to remove all watches in the group in an efficient manner. */
+  void remove();
+
+  /** Create a child [ChangeDetectorGroup] */
+  ChangeDetectorGroup<H> newGroup();
+}
+
+/**
+ * An interface for [ChangeDetector]. An application can have multiple instances
+ * of the [ChangeDetector] to be used for checking different application domains.
+ *
+ * [ChangeDetector] works by comparing the identity of the objects not by
+ * calling the `.equals()` method. This is because ChangeDetector needs to have
+ * predictable performance, and the developer can implement `.equals()` on top
+ * of identity checks.
+ *
+ * - [H] A [ChangeRecord] has associated handler object. The handler object is
+ * opaque to the [ChangeDetector] but it is meaningful to the code which
+ * registered the watcher. It can be a data structure, an object, or a function.
+ * It is up to the developer to attach meaning to it.
+ */
+abstract class ChangeDetector<H> extends ChangeDetectorGroup<H> {
+  /**
+   * This method does the work of collecting the changes and returns them as a
+   * linked list of [ChangeRecord]s. The [ChangeRecord]s are returned in the
+   * same order as they were registered.
+   */
+  ChangeRecord<H> collectChanges({ EvalExceptionHandler exceptionHandler,
+                                   AvgStopwatch stopwatch });
+}
+
+abstract class Record<H> {
+  /** The observed object. */
+  Object get object;
+
+  /**
+   * The field which is being watched:
+   *   - _name_ - Name of the field to watch.
+   *   - _[]_ - Watch all items in an array.
+   *   - _{}_ - Watch all items in a Map.
+   *   - _._ - Watch the actual object identity.
+   */
+  String get field;
+
+  /**
+   * An application provided object which contains the specific logic which
+   * needs to be applied when the change is detected. The handler is opaque to
+   * the ChangeDetector and as such can be anything the application desires.
+   */
+  H get handler;
+
+  /** Current value of the [field] on the [object] */
+  get currentValue;
+  /** Previous value of the [field] on the [object] */
+  get previousValue;
+}
+
+/**
+ * [WatchRecord] API which allows changing what object is being watched and
+ * manually triggering the checking.
+ */
+abstract class WatchRecord<H> extends Record<H> {
+  /** Set a new object for checking */
+  set object(value);
+
+  /**
+   * Check to see if the field on the object has changed. Returns [null] if no
+   * change, or a [ChangeRecord] if a change has been detected.
+   */
+  ChangeRecord<H> check();
+
+  void remove();
+}
+
+/**
+ * Provides information about the changes which were detected in objects.
+ *
+ * It exposes a `nextChange` method for traversing all of the changes.
+ */
+abstract class ChangeRecord<H> extends Record<H> {
+  /** Next [ChangeRecord] */
+  ChangeRecord<H> get nextChange;
+}
+
+/**
+ * If the [ChangeDetector] is watching a [Map] then the [currentValue] of
+ * [Record] will contain an instance of this object. A [MapChangeRecord]
+ * contains the changes to the map since the last execution. The changes are
+ * reported as a list of [MapKeyValue]s which contain the key as well as its
+ * current and previous value.
+ */
+abstract class MapChangeRecord<K, V> {
+  /// The underlying iterable object
+  Map get map;
+
+  /// A list of [CollectionKeyValue]s which are in the iteration order. */
+  KeyValue<K, V> get mapHead;
+  /// A list of changed items.
+  ChangedKeyValue<K, V> get changesHead;
+  /// A list of new added items.
+  AddedKeyValue<K, V> get additionsHead;
+  /// A list of removed items
+  RemovedKeyValue<K, V> get removalsHead;
+
+  void forEachChange(void f(ChangedKeyValue<K, V> change));
+  void forEachAddition(void f(AddedKeyValue<K, V> addition));
+  void forEachRemoval(void f(RemovedKeyValue<K, V> removal));
+}
+
+/**
+ * Each item in map is wrapped in [MapKeyValue], which can track
+ * the [item]s [currentValue] and [previousValue] location.
+ */
+abstract class MapKeyValue<K, V> {
+  /// The item.
+  K get key;
+
+  /// Previous item location in the list or [null] if addition.
+  V get previousValue;
+
+  /// Current item location in the list or [null] if removal.
+  V get currentValue;
+}
+
+abstract class KeyValue<K, V> extends MapKeyValue<K, V> {
+  KeyValue<K, V> get nextKeyValue;
+}
+
+abstract class AddedKeyValue<K, V> extends MapKeyValue<K, V> {
+  AddedKeyValue<K, V> get nextAddedKeyValue;
+}
+
+abstract class RemovedKeyValue<K, V> extends MapKeyValue<K, V> {
+  RemovedKeyValue<K, V> get nextRemovedKeyValue;
+}
+
+abstract class ChangedKeyValue<K, V> extends MapKeyValue<K, V> {
+  ChangedKeyValue<K, V> get nextChangedKeyValue;
+}
+
+
+/**
+ * If the [ChangeDetector] is watching an [Iterable] then the [currentValue] of
+ * [Record] will contain this object. The [CollectionChangeRecord] contains the
+ * changes to the collection since the last execution. The changes are reported
+ * as a list of [CollectionChangeItem]s which contain the item as well as its
+ * current and previous position in the list.
+ */
+abstract class CollectionChangeRecord<V> {
+  /** The underlying iterable object */
+  Iterable get iterable;
+
+  /** A list of [CollectionItem]s which are in the iteration order. */
+  CollectionItem<V> get collectionHead;
+  /** A list of new [AddedItem]s. */
+  AddedItem<V> get additionsHead;
+  /** A list of [MovedItem]s. */
+  MovedItem<V> get movesHead;
+  /** A list of [RemovedItem]s. */
+  RemovedItem<V> get removalsHead;
+
+  void forEachAddition(void f(AddedItem<V> addition));
+  void forEachMove(void f(MovedItem<V> move));
+  void forEachRemoval(void f(RemovedItem<V> removal));
+}
+
+/**
+ * Each changed item in the collection is wrapped in a [CollectionChangeItem],
+ * which tracks the [item]s [currentKey] and [previousKey] location.
+ */
+abstract class CollectionChangeItem<V> {
+  /** Previous item location in the list or [null] if addition. */
+  int get previousIndex;
+
+  /** Current item location in the list or [null] if removal. */
+  int get currentIndex;
+
+  /** The item. */
+  V get item;
+}
+
+/**
+ * Used to create a linked list of collection items. These items are always in
+ * the iteration order of the collection.
+ */
+abstract class CollectionItem<V> extends CollectionChangeItem<V> {
+  CollectionItem<V> get nextCollectionItem;
+}
+
+/**
+ * A linked list of new items added to the collection. These items are always in
+ * the iteration order of the collection.
+ */
+abstract class AddedItem<V> extends CollectionChangeItem<V> {
+  AddedItem<V> get nextAddedItem;
+}
+
+/**
+ * A linked list of items  moved in the collection. These items are always in
+ * the iteration order of the collection.
+ */
+abstract class MovedItem<V> extends CollectionChangeItem<V> {
+  MovedItem<V> get nextMovedItem;
+}
+
+/**
+ * A linked list of items removed  from the collection. These items are always
+ * in the iteration order of the collection.
+ */
+abstract class RemovedItem<V> extends CollectionChangeItem<V> {
+  RemovedItem<V> get nextRemovedItem;
+}
+
+class AvgStopwatch extends Stopwatch {
+  int _count = 0;
+
+  int get count => _count;
+
+  void reset() {
+    _count = 0;
+    super.reset();
+  }
+
+  int increment(int count) => _count += count;
+
+  double get ratePerMs => elapsedMicroseconds == 0
+      ? 0.0
+      : _count / elapsedMicroseconds * 1000;
+}