pkg/unittest: using matcher and mock from packages

pkg/unittest/lib/mock.dart

Index: pkg/unittest/lib/mock.dart
diff --git a/pkg/unittest/lib/mock.dart b/pkg/unittest/lib/mock.dart
index 02c40e302263c3bece2b24b7c4a7881eedcce223..dac509627fb9e064f71cc0921e73f533991439c0 100644
--- a/pkg/unittest/lib/mock.dart
+++ b/pkg/unittest/lib/mock.dart
@@ -2,1551 +2,11 @@
 // 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.
 
-/**
- * A simple mocking/spy library.
- *
- * ## Installing ##
- *
- * Use [pub][] to install this package. Add the following to your `pubspec.yaml`
- * file.
- *
- *     dependencies:
- *       unittest: any
- *
- * Then run `pub install`.
- *
- * Import this into your Dart code with:
- *
- *     import 'package:unittest/mock.dart';
- *
- * For more information, see the [unittest package on pub.dartlang.org]
- * (http://pub.dartlang.org/packages/unittest).
- *
- * ## Using ##
- *
- * To create a mock objects for some class T, create a new class using:
- *
- *     class MockT extends Mock implements T {};
- *
- * Then specify the [Behavior] of the Mock for different methods using
- * [when] (to select the method and parameters) and then the [Action]s
- * for the [Behavior] by calling [thenReturn], [alwaysReturn], [thenThrow],
- * [alwaysThrow], [thenCall] or [alwaysCall].
- *
- * [thenReturn], [thenThrow] and [thenCall] are one-shot so you would
- * typically call these more than once to specify a sequence of actions;
- * this can be done with chained calls, e.g.:
- *
- *      m.when(callsTo('foo')).
- *          thenReturn(0).thenReturn(1).thenReturn(2);
- *
- * [thenCall] and [alwaysCall] allow you to proxy mocked methods, chaining
- * to some other implementation. This provides a way to implement 'spies'.
- *
- * For getters and setters, use "get foo" and "set foo"-style arguments
- * to [callsTo].
- *
- * You can disable logging for a particular [Behavior] easily:
- *
- *     m.when(callsTo('bar')).logging = false;
- *
- * You can then use the mock object. Once you are done, to verify the
- * behavior, use [getLogs] to extract a relevant subset of method call
- * logs and apply [Matchers] to these through calling [verify].
- *
- * A Mock can be given a name when constructed. In this case instead of
- * keeping its own log, it uses a shared log. This can be useful to get an
- * audit trail of interleaved behavior. It is the responsibility of the user
- * to ensure that mock names, if used, are unique.
- *
- * Limitations:
- *
- * * only positional parameters are supported (up to 10);
- * * to mock getters you will need to include parentheses in the call
- *       (e.g. m.length() will work but not m.length).
- *
- * Here is a simple example:
- *
- *     class MockList extends Mock implements List {};
- *
- *     List m = new MockList();
- *     m.when(callsTo('add', anything)).alwaysReturn(0);
- *
- *     m.add('foo');
- *     m.add('bar');
- *
- *     getLogs(m, callsTo('add', anything)).verify(happenedExactly(2));
- *     getLogs(m, callsTo('add', 'foo')).verify(happenedOnce);
- *     getLogs(m, callsTo('add', 'isNull)).verify(neverHappened);
- *
- * Note that we don't need to provide argument matchers for all arguments,
- * but we do need to provide arguments for all matchers. So this is allowed:
- *
- *     m.when(callsTo('add')).alwaysReturn(0);
- *     m.add(1, 2);
- *
- * But this is not allowed and will throw an exception:
- *
- *     m.when(callsTo('add', anything, anything)).alwaysReturn(0);
- *     m.add(1);
- *
- * Here is a way to implement a 'spy', which is where we log the call
- * but then hand it off to some other function, which is the same
- * method in a real instance of the class being mocked:
- *
- *     class Foo {
- *       bar(a, b, c) => a + b + c;
- *     }
- *
- *     class MockFoo extends Mock implements Foo {
- *       Foo real;
- *       MockFoo() {
- *         real = new Foo();
- *         this.when(callsTo('bar')).alwaysCall(real.bar);
- *       }
- *     }
- *
- * However, there is an even easier way, by calling [Mock.spy], e.g.:
- *
- *      var foo = new Foo();
- *      var spy = new Mock.spy(foo);
- *      print(spy.bar(1, 2, 3));
- *
- * Spys created with Mock.spy do not have user-defined behavior;
- * they are simply proxies,  and thus will throw an exception if
- * you call [when]. They capture all calls in the log, so you can
- * do assertions on their history, such as:
- *
- *       spy.getLogs(callsTo('bar')).verify(happenedOnce);
- *
- * [pub]: http://pub.dartlang.org
- */
-
+/// `unittest.mock` has been moved to the `matcher` package.
+///
+/// Add `matcher` to your `pubspec.yaml` file and import it via
+/// `import 'package:matcher/mirror_matchers.dart';`
+@deprecated
 library unittest.mock;
 
-import 'dart:mirrors';
-import 'dart:collection' show LinkedHashMap;
-
-import 'matcher.dart';
-
-/**
- * The error formatter for mocking is a bit different from the default one
- * for unit testing; instead of the third argument being a 'reason'
- * it is instead a [signature] describing the method signature filter
- * that was used to select the logs that were verified.
- */
-String _mockingErrorFormatter(actual, Matcher matcher, String signature,
-                              Map matchState, bool verbose) {
-  var description = new StringDescription();
-  description.add('Expected ${signature} ').addDescriptionOf(matcher).
-      add('\n     but: ');
-  matcher.describeMismatch(actual, description, matchState, verbose).add('.');
-  return description.toString();
-}
-
-/**
- * The failure handler for the [expect()] calls that occur in [verify()]
- * methods in the mock objects. This calls the real failure handler used
- * by the unit test library after formatting the error message with
- * the custom formatter.
- */
-class _MockFailureHandler implements FailureHandler {
-  FailureHandler proxy;
-  _MockFailureHandler(this.proxy);
-  void fail(String reason) {
-    proxy.fail(reason);
-  }
-  void failMatch(actual, Matcher matcher, String reason,
-                 Map matchState, bool verbose) {
-    proxy.fail(_mockingErrorFormatter(actual, matcher, reason,
-        matchState, verbose));
-  }
-}
-
-_MockFailureHandler _mockFailureHandler = null;
-
-/** Sentinel value for representing no argument. */
-class _Sentinel {
-  const _Sentinel();
-}
-const _noArg = const _Sentinel();
-
-/** The ways in which a call to a mock method can be handled. */
-class Action {
-  /** Do nothing (void method) */
-  static const IGNORE = const Action._('IGNORE');
-
-  /** Return a supplied value. */
-  static const RETURN = const Action._('RETURN');
-
-  /** Throw a supplied value. */
-  static const THROW = const Action._('THROW');
-
-  /** Call a supplied function. */
-  static const PROXY = const Action._('PROXY');
-
-  const Action._(this.name);
-
-  final String name;
-
-  String toString() => 'Action: $name';
-}
-
-/**
- * The behavior of a method call in the mock library is specified
- * with [Responder]s. A [Responder] has a [value] to throw
- * or return (depending on the type of [action]),
- * and can either be one-shot, multi-shot, or infinitely repeating,
- * depending on the value of [count (1, greater than 1, or 0 respectively).
- */
-class Responder {
-  final Object value;
-  final Action action;
-  int count;
-  Responder(this.value, [this.count = 1, this.action = Action.RETURN]);
-}
-
-/**
- * A [CallMatcher] is a special matcher used to match method calls (i.e.
- * a method name and set of arguments). It is not a [Matcher] like the
- * unit test [Matcher], but instead represents a method name and a
- * collection of [Matcher]s, one per argument, that will be applied
- * to the parameters to decide if the method call is a match.
- */
-class CallMatcher {
-  Matcher nameFilter;
-  List<Matcher> argMatchers;
-
-  /**
-   * Constructor for [CallMatcher]. [name] can be null to
-   * match anything, or a literal [String], a predicate [Function],
-   * or a [Matcher]. The various arguments can be scalar values or
-   * [Matcher]s.
-   */
-  CallMatcher([name,
-              arg0 = _noArg,
-              arg1 = _noArg,
-              arg2 = _noArg,
-              arg3 = _noArg,
-              arg4 = _noArg,
-              arg5 = _noArg,
-              arg6 = _noArg,
-              arg7 = _noArg,
-              arg8 = _noArg,
-              arg9 = _noArg]) {
-    if (name == null) {
-      nameFilter = anything;
-    } else {
-      nameFilter = wrapMatcher(name);
-    }
-    argMatchers = new List<Matcher>();
-    if (identical(arg0, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg0));
-    if (identical(arg1, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg1));
-    if (identical(arg2, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg2));
-    if (identical(arg3, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg3));
-    if (identical(arg4, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg4));
-    if (identical(arg5, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg5));
-    if (identical(arg6, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg6));
-    if (identical(arg7, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg7));
-    if (identical(arg8, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg8));
-    if (identical(arg9, _noArg)) return;
-    argMatchers.add(wrapMatcher(arg9));
-  }
-
-  /**
-   * We keep our behavior specifications in a Map, which is keyed
-   * by the [CallMatcher]. To make the keys unique and to get a
-   * descriptive value for the [CallMatcher] we have this override
-   * of [toString()].
-   */
-  String toString() {
-    Description d = new StringDescription();
-    d.addDescriptionOf(nameFilter);
-    // If the nameFilter was a simple string - i.e. just a method name -
-    // strip the quotes to make this more natural in appearance.
-    if (d.toString()[0] == "'") {
-      d.replace(d.toString().substring(1, d.toString().length - 1));
-    }
-    d.add('(');
-    for (var i = 0; i < argMatchers.length; i++) {
-      if (i > 0) d.add(', ');
-      d.addDescriptionOf(argMatchers[i]);
-    }
-    d.add(')');
-    return d.toString();
-  }
-
-  /**
-   * Given a [method] name and list of [arguments], return true
-   * if it matches this [CallMatcher.
-   */
-  bool matches(String method, List arguments) {
-    var matchState = {};
-    if (!nameFilter.matches(method, matchState)) {
-      return false;
-    }
-    var numArgs = (arguments == null) ? 0 : arguments.length;
-    if (numArgs < argMatchers.length) {
-      throw new Exception("Less arguments than matchers for $method.");
-    }
-    for (var i = 0; i < argMatchers.length; i++) {
-      if (!argMatchers[i].matches(arguments[i], matchState)) {
-        return false;
-      }
-    }
-    return true;
-  }
-}
-
-/**
- * Returns a [CallMatcher] for the specified signature. [method] can be
- * null to match anything, or a literal [String], a predicate [Function],
- * or a [Matcher]. The various arguments can be scalar values or [Matcher]s.
- * To match getters and setters, use "get " and "set " prefixes on the names.
- * For example, for a property "foo", you could use "get foo" and "set foo"
- * as literal string arguments to callsTo to match the getter and setter
- * of "foo".
- */
-CallMatcher callsTo([method,
-                     arg0 = _noArg,
-                     arg1 = _noArg,
-                     arg2 = _noArg,
-                     arg3 = _noArg,
-                     arg4 = _noArg,
-                     arg5 = _noArg,
-                     arg6 = _noArg,
-                     arg7 = _noArg,
-                     arg8 = _noArg,
-                     arg9 = _noArg]) {
-  return new CallMatcher(method, arg0, arg1, arg2, arg3, arg4,
-      arg5, arg6, arg7, arg8, arg9);
-}
-
-/**
- * A [Behavior] represents how a [Mock] will respond to one particular
- * type of method call.
- */
-class Behavior {
-  CallMatcher matcher; // The method call matcher.
-  List<Responder> actions; // The values to return/throw or proxies to call.
-  bool logging = true;
-
-  Behavior (this.matcher) {
-    actions = new List<Responder>();
-  }
-
-  /**
-   * Adds a [Responder] that returns a [value] for [count] calls
-   * (1 by default).
-   */
-  Behavior thenReturn(value, [count = 1]) {
-    actions.add(new Responder(value, count, Action.RETURN));
-    return this; // For chaining calls.
-  }
-
-  /** Adds a [Responder] that repeatedly returns a [value]. */
-  Behavior alwaysReturn(value) {
-    return thenReturn(value, 0);
-  }
-
-  /**
-   * Adds a [Responder] that throws [value] [count]
-   * times (1 by default).
-   */
-  Behavior thenThrow(value, [count = 1]) {
-    actions.add(new Responder(value, count, Action.THROW));
-    return this; // For chaining calls.
-  }
-
-  /** Adds a [Responder] that throws [value] endlessly. */
-  Behavior alwaysThrow(value) {
-    return thenThrow(value, 0);
-  }
-
-  /**
-   * [thenCall] creates a proxy Responder, that is called [count]
-   * times (1 by default; 0 is used for unlimited calls, and is
-   * exposed as [alwaysCall]). [value] is the function that will
-   * be called with the same arguments that were passed to the
-   * mock. Proxies can be used to wrap real objects or to define
-   * more complex return/throw behavior. You could even (if you
-   * wanted) use proxies to emulate the behavior of thenReturn;
-   * e.g.:
-   *
-   *     m.when(callsTo('foo')).thenReturn(0)
-   *
-   * is equivalent to:
-   *
-   *     m.when(callsTo('foo')).thenCall(() => 0)
-   */
-  Behavior thenCall(value, [count = 1]) {
-    actions.add(new Responder(value, count, Action.PROXY));
-    return this; // For chaining calls.
-  }
-
-  /** Creates a repeating proxy call. */
-  Behavior alwaysCall(value) {
-    return thenCall(value, 0);
-  }
-
-  /** Returns true if a method call matches the [Behavior]. */
-  bool matches(String method, List args) => matcher.matches(method, args);
-
-  /** Returns the [matcher]'s representation. */
-  String toString() => matcher.toString();
-}
-
-/**
- * Every call to a [Mock] object method is logged. The logs are
- * kept in instances of [LogEntry].
- */
-class LogEntry {
-  /** The time of the event. */
-  DateTime time;
-
-  /** The mock object name, if any. */
-  final String mockName;
-
-  /** The method name. */
-  final String methodName;
-
-  /** The parameters. */
-  final List args;
-
-  /** The behavior that resulted. */
-  final Action action;
-
-  /** The value that was returned (if no throw). */
-  final value;
-
-  LogEntry(this.mockName, this.methodName,
-      this.args, this.action, [this.value]) {
-    time = new DateTime.now();
-  }
-
-  String _pad2(int val) => (val >= 10 ? '$val' : '0$val');
-
-  String toString([DateTime baseTime]) {
-    Description d = new StringDescription();
-    if (baseTime == null) {
-      // Show absolute time.
-      d.add('${time.hour}:${_pad2(time.minute)}:'
-          '${_pad2(time.second)}.${time.millisecond}>  ');
-    } else {
-      // Show relative time.
-      int delta = time.millisecondsSinceEpoch - baseTime.millisecondsSinceEpoch;
-      int secs = delta ~/ 1000;
-      int msecs = delta % 1000;
-      d.add('$secs.$msecs>  ');
-    }
-    d.add('${_qualifiedName(mockName, methodName)}(');
-    if (args != null) {
-      for (var i = 0; i < args.length; i++) {
-        if (i != 0) d.add(', ');
-        d.addDescriptionOf(args[i]);
-      }
-    }
-    d.add(') ${action == Action.THROW ? "threw" : "returned"} ');
-    d.addDescriptionOf(value);
-    return d.toString();
-  }
-}
-
-/** Utility function for optionally qualified method names */
-String _qualifiedName(owner, String method) {
-  if (owner == null || identical(owner, anything)) {
-    return method;
-  } else if (owner is Matcher) {
-    Description d = new StringDescription();
-    d.addDescriptionOf(owner);
-    d.add('.');
-    d.add(method);
-    return d.toString();
-  } else {
-    return '$owner.$method';
-  }
-}
-
-/**
-* [StepValidator]s are used by [stepwiseValidate] in [LogEntryList], which
-* iterates through the list and call the [StepValidator] function with the
-* log [List] and position. The [StepValidator] should return the number of
-* positions to advance upon success, or zero upon failure. When zero is
-* returned an error is reported.
-*/
-typedef int StepValidator(List<LogEntry> logs, int pos);
-
-/**
- * We do verification on a list of [LogEntry]s. To allow chaining
- * of calls to verify, we encapsulate such a list in the [LogEntryList]
- * class.
- */
-class LogEntryList {
-  String filter;
-  List<LogEntry> logs;
-  LogEntryList([this.filter]) {
-    logs = new List<LogEntry>();
-  }
-
-  /** Add a [LogEntry] to the log. */
-  add(LogEntry entry) => logs.add(entry);
-
-  /** Get the first entry, or null if no entries. */
-  get first => (logs == null || logs.length == 0) ? null : logs[0];
-
-  /** Get the last entry, or null if no entries. */
-  get last => (logs == null || logs.length == 0) ? null : logs.last;
-
-  /** Creates a LogEntry predicate function from the argument. */
-  Function _makePredicate(arg) {
-    if (arg == null) {
-      return (e) => true;
-    } else if (arg is CallMatcher) {
-      return (e) => arg.matches(e.methodName, e.args);
-    } else if (arg is Function) {
-      return arg;
-    } else {
-      throw new Exception("Invalid argument to _makePredicate.");
-    }
-  }
-
-  /**
-   * Create a new [LogEntryList] consisting of [LogEntry]s from
-   * this list that match the specified [mockNameFilter] and [logFilter].
-   * [mockNameFilter] can be null, a [String], a predicate [Function],
-   * or a [Matcher]. If [mockNameFilter] is null, this is the same as
-   * [anything].
-   * If [logFilter] is null, all entries in the log will be returned.
-   * Otherwise [logFilter] should be a [CallMatcher] or  predicate function
-   * that takes a [LogEntry] and returns a bool.
-   * If [destructive] is true, the log entries are removed from the
-   * original list.
-   */
-  LogEntryList getMatches([mockNameFilter,
-                          logFilter,
-                          Matcher actionMatcher,
-                          bool destructive = false]) {
-    if (mockNameFilter == null) {
-      mockNameFilter = anything;
-    } else {
-      mockNameFilter = wrapMatcher(mockNameFilter);
-    }
-    Function entryFilter = _makePredicate(logFilter);
-    String filterName = _qualifiedName(mockNameFilter, logFilter.toString());
-    LogEntryList rtn = new LogEntryList(filterName);
-    var matchState = {};
-    for (var i = 0; i < logs.length; i++) {
-      LogEntry entry = logs[i];
-      if (mockNameFilter.matches(entry.mockName, matchState) &&
-          entryFilter(entry)) {
-        if (actionMatcher == null ||
-            actionMatcher.matches(entry, matchState)) {
-          rtn.add(entry);
-          if (destructive) {
-            int startIndex = i--;
-            logs.removeRange(startIndex, startIndex + 1);
-          }
-        }
-      }
-    }
-    return rtn;
-  }
-
-  /** Apply a unit test [Matcher] to the [LogEntryList]. */
-  LogEntryList verify(Matcher matcher) {
-    if (_mockFailureHandler == null) {
-      _mockFailureHandler =
-          new _MockFailureHandler(getOrCreateExpectFailureHandler());
-    }
-    expect(logs, matcher, reason:filter, failureHandler: _mockFailureHandler);
-    return this;
-  }
-
-  /**
-   * Iterate through the list and call the [validator] function with the
-   * log [List] and position. The [validator] should return the number of
-   * positions to advance upon success, or zero upon failure. When zero is
-   * returned an error is reported. [reason] can be used to provide a
-   * more descriptive failure message. If a failure occurred false will be
-   * returned (unless the failure handler itself threw an exception);
-   * otherwise true is returned.
-   * The use case here is to perform more complex validations; for example
-   * we may want to assert that the return value from some function is
-   * later used as a parameter to a following function. If we filter the logs
-   * to include just these two functions we can write a simple validator to
-   * do this check.
-   */
-  bool stepwiseValidate(StepValidator validator, [String reason = '']) {
-    if (_mockFailureHandler == null) {
-      _mockFailureHandler =
-          new _MockFailureHandler(getOrCreateExpectFailureHandler());
-    }
-    var i = 0;
-    while (i < logs.length) {
-      var n = validator(logs, i);
-      if (n == 0) {
-        if (reason.length > 0) {
-          reason = ': $reason';
-        }
-        _mockFailureHandler.fail("Stepwise validation failed at $filter "
-                                 "position $i$reason");
-        return false;
-      } else {
-        i += n;
-      }
-    }
-    return true;
-  }
-
-  /**
-   * Turn the logs into human-readable text. If [baseTime] is specified
-   * then each entry is prefixed with the offset from that time in
-   * milliseconds; otherwise the time of day is used.
-   */
-  String toString([DateTime baseTime]) {
-    String s = '';
-    for (var e in logs) {
-      s = '$s${e.toString(baseTime)}\n';
-    }
-    return s;
-  }
-
-  /**
-   *  Find the first log entry that satisfies [logFilter] and
-   *  return its position. A search [start] position can be provided
-   *  to allow for repeated searches. [logFilter] can be a [CallMatcher],
-   *  or a predicate function that takes a [LogEntry] argument and returns
-   *  a bool. If [logFilter] is null, it will match any [LogEntry].
-   *  If no entry is found, then [failureReturnValue] is returned.
-   *  After each check the position is updated by [skip], so using
-   *  [skip] of -1 allows backward searches, using a [skip] of 2 can
-   *  be used to check pairs of adjacent entries, and so on.
-   */
-  int findLogEntry(logFilter, [int start = 0, int failureReturnValue = -1,
-      skip = 1]) {
-    logFilter = _makePredicate(logFilter);
-    int pos = start;
-    while (pos >= 0 && pos < logs.length) {
-      if (logFilter(logs[pos])) {
-        return pos;
-      }
-      pos += skip;
-    }
-    return failureReturnValue;
-  }
-
-  /**
-   * Returns log events that happened up to the first one that
-   * satisfies [logFilter]. If [inPlace] is true, then returns
-   * this LogEntryList after removing the from the first satisfier;
-   * onwards otherwise a new list is created. [description]
-   * is used to create a new name for the resulting list.
-   * [defaultPosition] is used as the index of the matching item in
-   * the case that no match is found.
-   */
-  LogEntryList _head(logFilter, bool inPlace,
-                     String description, int defaultPosition) {
-    if (filter != null) {
-      description = '$filter $description';
-    }
-    int pos = findLogEntry(logFilter, 0, defaultPosition);
-    if (inPlace) {
-      if (pos < logs.length) {
-        logs.removeRange(pos, logs.length);
-      }
-      filter = description;
-      return this;
-    } else {
-      LogEntryList newList = new LogEntryList(description);
-      for (var i = 0; i < pos; i++) {
-        newList.logs.add(logs[i]);
-      }
-      return newList;
-    }
-  }
-
-  /**
-   * Returns log events that happened from the first one that
-   * satisfies [logFilter]. If [inPlace] is true, then returns
-   * this LogEntryList after removing the entries up to the first
-   * satisfier; otherwise a new list is created. [description]
-   * is used to create a new name for the resulting list.
-   * [defaultPosition] is used as the index of the matching item in
-   * the case that no match is found.
-   */
-  LogEntryList _tail(logFilter, bool inPlace,
-                     String description, int defaultPosition) {
-    if (filter != null) {
-      description = '$filter $description';
-    }
-    int pos = findLogEntry(logFilter, 0, defaultPosition);
-    if (inPlace) {
-      if (pos > 0) {
-        logs.removeRange(0, pos);
-      }
-      filter = description;
-      return this;
-    } else {
-      LogEntryList newList = new LogEntryList(description);
-      while (pos < logs.length) {
-        newList.logs.add(logs[pos++]);
-      }
-      return newList;
-    }
-  }
-
-  /**
-   * Returns log events that happened after [when]. If [inPlace]
-   * is true, then it returns this LogEntryList after removing
-   * the entries that happened up to [when]; otherwise a new
-   * list is created.
-   */
-  LogEntryList after(DateTime when, [bool inPlace = false]) =>
-      _tail((e) => e.time.isAfter(when), inPlace, 'after $when', logs.length);
-
-  /**
-   * Returns log events that happened from [when] onwards. If
-   * [inPlace] is true, then it returns this LogEntryList after
-   * removing the entries that happened before [when]; otherwise
-   * a new list is created.
-   */
-  LogEntryList from(DateTime when, [bool inPlace = false]) =>
-      _tail((e) => !e.time.isBefore(when), inPlace, 'from $when', logs.length);
-
-  /**
-   * Returns log events that happened until [when]. If [inPlace]
-   * is true, then it returns this LogEntryList after removing
-   * the entries that happened after [when]; otherwise a new
-   * list is created.
-   */
-  LogEntryList until(DateTime when, [bool inPlace = false]) =>
-      _head((e) => e.time.isAfter(when), inPlace, 'until $when', logs.length);
-
-  /**
-   * Returns log events that happened before [when]. If [inPlace]
-   * is true, then it returns this LogEntryList after removing
-   * the entries that happened from [when] onwards; otherwise a new
-   * list is created.
-   */
-  LogEntryList before(DateTime when, [bool inPlace = false]) =>
-      _head((e) => !e.time.isBefore(when),
-            inPlace,
-            'before $when',
-            logs.length);
-
-  /**
-   * Returns log events that happened after [logEntry]'s time.
-   * If [inPlace] is true, then it returns this LogEntryList after
-   * removing the entries that happened up to [when]; otherwise a new
-   * list is created. If [logEntry] is null the current time is used.
-   */
-  LogEntryList afterEntry(LogEntry logEntry, [bool inPlace = false]) =>
-      after(logEntry == null ? new DateTime.now() : logEntry.time);
-
-  /**
-   * Returns log events that happened from [logEntry]'s time onwards.
-   * If [inPlace] is true, then it returns this LogEntryList after
-   * removing the entries that happened before [when]; otherwise
-   * a new list is created. If [logEntry] is null the current time is used.
-   */
-  LogEntryList fromEntry(LogEntry logEntry, [bool inPlace = false]) =>
-      from(logEntry == null ? new DateTime.now() : logEntry.time);
-
-  /**
-   * Returns log events that happened until [logEntry]'s time. If
-   * [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened after [when]; otherwise a new
-   * list is created. If [logEntry] is null the epoch time is used.
-   */
-  LogEntryList untilEntry(LogEntry logEntry, [bool inPlace = false]) =>
-      until(logEntry == null ?
-          new DateTime.fromMillisecondsSinceEpoch(0) : logEntry.time);
-
-  /**
-   * Returns log events that happened before [logEntry]'s time. If
-   * [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened from [when] onwards; otherwise a new
-   * list is created. If [logEntry] is null the epoch time is used.
-   */
-  LogEntryList beforeEntry(LogEntry logEntry, [bool inPlace = false]) =>
-      before(logEntry == null ?
-          new DateTime.fromMillisecondsSinceEpoch(0) : logEntry.time);
-
-  /**
-   * Returns log events that happened after the first event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened earlier; otherwise a new list is created.
-   */
-  LogEntryList afterFirst(LogEntryList segment, [bool inPlace = false]) =>
-      afterEntry(segment.first, inPlace);
-
-  /**
-   * Returns log events that happened after the last event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened earlier; otherwise a new list is created.
-   */
-  LogEntryList afterLast(LogEntryList segment, [bool inPlace = false]) =>
-      afterEntry(segment.last, inPlace);
-
-  /**
-   * Returns log events that happened from the time of the first event in
-   * [segment] onwards. If [inPlace] is true, then it returns this
-   * LogEntryList after removing the earlier entries; otherwise a new list
-   * is created.
-   */
-  LogEntryList fromFirst(LogEntryList segment, [bool inPlace = false]) =>
-      fromEntry(segment.first, inPlace);
-
-  /**
-   * Returns log events that happened from the time of the last event in
-   * [segment] onwards. If [inPlace] is true, then it returns this
-   * LogEntryList after removing the earlier entries; otherwise a new list
-   * is created.
-   */
-  LogEntryList fromLast(LogEntryList segment, [bool inPlace = false]) =>
-      fromEntry(segment.last, inPlace);
-
-  /**
-   * Returns log events that happened until the first event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened later; otherwise a new list is created.
-   */
-  LogEntryList untilFirst(LogEntryList segment, [bool inPlace = false]) =>
-      untilEntry(segment.first, inPlace);
-
-  /**
-   * Returns log events that happened until the last event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened later; otherwise a new list is created.
-   */
-  LogEntryList untilLast(LogEntryList segment, [bool inPlace = false]) =>
-      untilEntry(segment.last, inPlace);
-
-  /**
-   * Returns log events that happened before the first event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened later; otherwise a new list is created.
-   */
-  LogEntryList beforeFirst(LogEntryList segment, [bool inPlace = false]) =>
-      beforeEntry(segment.first, inPlace);
-
-  /**
-   * Returns log events that happened before the last event in [segment].
-   * If [inPlace] is true, then it returns this LogEntryList after removing
-   * the entries that happened later; otherwise a new list is created.
-   */
-  LogEntryList beforeLast(LogEntryList segment, [bool inPlace = false]) =>
-      beforeEntry(segment.last, inPlace);
-
-  /**
-   * Iterate through the LogEntryList looking for matches to the entries
-   * in [keys]; for each match found the closest [distance] neighboring log
-   * entries that match [mockNameFilter] and [logFilter] will be included in
-   * the result. If [isPreceding] is true we use the neighbors that precede
-   * the matched entry; else we use the neighbors that followed.
-   * If [includeKeys] is true then the entries in [keys] that resulted in
-   * entries in the output list are themselves included in the output list. If
-   * [distance] is zero then all matches are included.
-   */
-  LogEntryList _neighboring(bool isPreceding,
-                            LogEntryList keys,
-                            mockNameFilter,
-                            logFilter,
-                            int distance,
-                            bool includeKeys) {
-    String filterName = 'Calls to '
-        '${_qualifiedName(mockNameFilter, logFilter.toString())} '
-        '${isPreceding?"preceding":"following"} ${keys.filter}';
-
-    LogEntryList rtn = new LogEntryList(filterName);
-
-    // Deal with the trivial case.
-    if (logs.length == 0 || keys.logs.length == 0) {
-      return rtn;
-    }
-
-    // Normalize the mockNameFilter and logFilter values.
-    if (mockNameFilter == null) {
-      mockNameFilter = anything;
-    } else {
-      mockNameFilter = wrapMatcher(mockNameFilter);
-    }
-    logFilter = _makePredicate(logFilter);
-
-    // The scratch list is used to hold matching entries when we
-    // are doing preceding neighbors. The remainingCount is used to
-    // keep track of how many matching entries we can still add in the
-    // current segment (0 if we are doing doing following neighbors, until
-    // we get our first key match).
-    List scratch = null;
-    int remainingCount = 0;
-    if (isPreceding) {
-      scratch = new List();
-      remainingCount = logs.length;
-    }
-
-    var keyIterator = keys.logs.iterator;
-    keyIterator.moveNext();
-    LogEntry keyEntry = keyIterator.current;
-    Map matchState = {};
-
-    for (LogEntry logEntry in logs) {
-      // If we have a log entry match, copy the saved matches from the
-      // scratch buffer into the return list, as well as the matching entry,
-      // if appropriate, and reset the scratch buffer. Continue processing
-      // from the next key entry.
-      if (keyEntry == logEntry) {
-        if (scratch != null) {
-          int numToCopy = scratch.length;
-          if (distance > 0 && distance < numToCopy) {
-            numToCopy = distance;
-          }
-          for (var i = scratch.length - numToCopy; i < scratch.length; i++) {
-            rtn.logs.add(scratch[i]);
-          }
-          scratch.clear();
-        } else {
-          remainingCount = distance > 0 ? distance : logs.length;
-        }
-        if (includeKeys) {
-          rtn.logs.add(keyEntry);
-        }
-        if (keyIterator.moveNext()) {
-          keyEntry = keyIterator.current;
-        } else if (isPreceding) { // We're done.
-          break;
-        }
-      } else if (remainingCount > 0 &&
-                 mockNameFilter.matches(logEntry.mockName, matchState) &&
-                 logFilter(logEntry)) {
-        if (scratch != null) {
-          scratch.add(logEntry);
-        } else {
-          rtn.logs.add(logEntry);
-          --remainingCount;
-        }
-      }
-    }
-    return rtn;
-  }
-
-  /**
-   * Iterate through the LogEntryList looking for matches to the entries
-   * in [keys]; for each match found the closest [distance] prior log entries
-   * that match [mocknameFilter] and [logFilter] will be included in the result.
-   * If [includeKeys] is true then the entries in [keys] that resulted in
-   * entries in the output list are themselves included in the output list. If
-   * [distance] is zero then all matches are included.
-   *
-   * The idea here is that you could find log entries that are related to
-   * other logs entries in some temporal sense. For example, say we have a
-   * method commit() that returns -1 on failure. Before commit() gets called
-   * the value being committed is created by process(). We may want to find
-   * the calls to process() that preceded calls to commit() that failed.
-   * We could do this with:
-   *
-   *      print(log.preceding(log.getLogs(callsTo('commit'), returning(-1)),
-   *          logFilter: callsTo('process')).toString());
-   *
-   * We might want to include the details of the failing calls to commit()
-   * to see what parameters were passed in, in which case we would set
-   * [includeKeys].
-   *
-   * As another simple example, say we wanted to know the three method
-   * calls that immediately preceded each failing call to commit():
-   *
-   *     print(log.preceding(log.getLogs(callsTo('commit'), returning(-1)),
-   *         distance: 3).toString());
-   */
-  LogEntryList preceding(LogEntryList keys,
-                         {mockNameFilter: null,
-                         logFilter: null,
-                         int distance: 1,
-                         bool includeKeys: false}) =>
-      _neighboring(true, keys, mockNameFilter, logFilter,
-          distance, includeKeys);
-
-  /**
-   * Iterate through the LogEntryList looking for matches to the entries
-   * in [keys]; for each match found the closest [distance] subsequent log
-   * entries that match [mocknameFilter] and [logFilter] will be included in
-   * the result. If [includeKeys] is true then the entries in [keys] that
-   * resulted in entries in the output list are themselves included in the
-   * output list. If [distance] is zero then all matches are included.
-   * See [preceding] for a usage example.
-   */
-  LogEntryList following(LogEntryList keys,
-                         {mockNameFilter: null,
-                         logFilter: null,
-                         int distance: 1,
-                         bool includeKeys: false}) =>
-      _neighboring(false, keys, mockNameFilter, logFilter,
-          distance, includeKeys);
-}
-
-/**
- * [_TimesMatcher]s are used to make assertions about the number of
- * times a method was called.
- */
-class _TimesMatcher extends Matcher {
-  final int min, max;
-
-  const _TimesMatcher(this.min, [this.max = -1]);
-
-  bool matches(logList, Map matchState) => logList.length >= min &&
-      (max < 0 || logList.length <= max);
-
-  Description describe(Description description) {
-    description.add('to be called ');
-    if (max < 0) {
-      description.add('at least $min');
-    } else if (max == min) {
-      description.add('$max');
-    } else if (min == 0) {
-      description.add('at most $max');
-    } else {
-      description.add('between $min and $max');
-    }
-    return description.add(' times');
-  }
-
-  Description describeMismatch(logList, Description mismatchDescription,
-                               Map matchState, bool verbose) =>
-      mismatchDescription.add('was called ${logList.length} times');
-}
-
-/** [happenedExactly] matches an exact number of calls. */
-Matcher happenedExactly(count) {
-  return new _TimesMatcher(count, count);
-}
-
-/** [happenedAtLeast] matches a minimum number of calls. */
-Matcher happenedAtLeast(count) {
-  return new _TimesMatcher(count);
-}
-
-/** [happenedAtMost] matches a maximum number of calls. */
-Matcher happenedAtMost(count) {
-  return new _TimesMatcher(0, count);
-}
-
-/** [neverHappened] matches zero calls. */
-const Matcher neverHappened = const _TimesMatcher(0, 0);
-
-/** [happenedOnce] matches exactly one call. */
-const Matcher happenedOnce = const _TimesMatcher(1, 1);
-
-/** [happenedAtLeastOnce] matches one or more calls. */
-const Matcher happenedAtLeastOnce = const _TimesMatcher(1);
-
-/** [happenedAtMostOnce] matches zero or one call. */
-const Matcher happenedAtMostOnce = const _TimesMatcher(0, 1);
-
-/**
- * [_ResultMatcher]s are used to make assertions about the results
- * of method calls. These can be used as optional parameters to [getLogs].
- */
-class _ResultMatcher extends Matcher {
-  final Action action;
-  final Matcher value;
-
-  const _ResultMatcher(this.action, this.value);
-
-  bool matches(item, Map matchState) {
-    if (item is! LogEntry) {
-     return false;
-    }
-    // normalize the action; _PROXY is like _RETURN.
-    Action eaction = item.action;
-    if (eaction == Action.PROXY) {
-      eaction = Action.RETURN;
-    }
-    return (eaction == action && value.matches(item.value, matchState));
-  }
-
-  Description describe(Description description) {
-    description.add(' to ');
-    if (action == Action.RETURN || action == Action.PROXY)
-      description.add('return ');
-    else
-      description.add('throw ');
-    return description.addDescriptionOf(value);
-  }
-
-  Description describeMismatch(item, Description mismatchDescription,
-                               Map matchState, bool verbose) {
-    if (item.action == Action.RETURN || item.action == Action.PROXY) {
-      mismatchDescription.add('returned ');
-    } else {
-      mismatchDescription.add('threw ');
-    }
-    mismatchDescription.add(item.value);
-    return mismatchDescription;
-  }
-}
-
-/**
- *[returning] matches log entries where the call to a method returned
- * a value that matched [value].
- */
-Matcher returning(value) =>
-    new _ResultMatcher(Action.RETURN, wrapMatcher(value));
-
-/**
- *[throwing] matches log entrues where the call to a method threw
- * a value that matched [value].
- */
-Matcher throwing(value) =>
-    new _ResultMatcher(Action.THROW, wrapMatcher(value));
-
-/** Special values for use with [_ResultSetMatcher] [frequency]. */
-class _Frequency {
-  /** Every call/throw must match */
-  static const ALL = const _Frequency._('ALL');
-
-  /** At least one call/throw must match. */
-  static const SOME = const _Frequency._('SOME');
-
-  /** No calls/throws should match. */
-  static const NONE = const _Frequency._('NONE');
-
-  const _Frequency._(this.name);
-
-  final String name;
-}
-
-/**
- * [_ResultSetMatcher]s are used to make assertions about the results
- * of method calls. When filtering an execution log by calling
- * [getLogs], a [LogEntrySet] of matching call logs is returned;
- * [_ResultSetMatcher]s can then assert various things about this
- * (sub)set of logs.
- *
- * We could make this class use _ResultMatcher but it doesn't buy that
- * match and adds some perf hit, so there is some duplication here.
- */
-class _ResultSetMatcher extends Matcher {
-  final Action action;
-  final Matcher value;
-  final _Frequency frequency; // ALL, SOME, or NONE.
-
-  const _ResultSetMatcher(this.action, this.value, this.frequency);
-
-  bool matches(logList, Map matchState) {
-    for (LogEntry entry in logList) {
-      // normalize the action; PROXY is like RETURN.
-      Action eaction = entry.action;
-      if (eaction == Action.PROXY) {
-        eaction = Action.RETURN;
-      }
-      if (eaction == action && value.matches(entry.value, matchState)) {
-        if (frequency == _Frequency.NONE) {
-          addStateInfo(matchState, {'entry': entry});
-          return false;
-        } else if (frequency == _Frequency.SOME) {
-          return true;
-        }
-      } else {
-        // Mismatch.
-        if (frequency == _Frequency.ALL) { // We need just one mismatch to fail.
-          addStateInfo(matchState, {'entry': entry});
-          return false;
-        }
-      }
-    }
-    // If we get here, then if count is _ALL we got all matches and
-    // this is success; otherwise we got all mismatched which is
-    // success for count == _NONE and failure for count == _SOME.
-    return (frequency != _Frequency.SOME);
-  }
-
-  Description describe(Description description) {
-    description.add(' to ');
-    description.add(frequency == _Frequency.ALL ? 'alway ' :
-        (frequency == _Frequency.NONE ? 'never ' : 'sometimes '));
-    if (action == Action.RETURN || action == Action.PROXY)
-      description.add('return ');
-    else
-      description.add('throw ');
-    return description.addDescriptionOf(value);
-  }
-
-  Description describeMismatch(logList, Description mismatchDescription,
-                               Map matchState, bool verbose) {
-    if (frequency != _Frequency.SOME) {
-      LogEntry entry = matchState['entry'];
-      if (entry.action == Action.RETURN || entry.action == Action.PROXY) {
-        mismatchDescription.add('returned');
-      } else {
-        mismatchDescription.add('threw');
-      }
-      mismatchDescription.add(' value that ');
-      value.describeMismatch(entry.value, mismatchDescription,
-        matchState['state'], verbose);
-      mismatchDescription.add(' at least once');
-    } else {
-      mismatchDescription.add('never did');
-    }
-    return mismatchDescription;
-  }
-}
-
-/**
- *[alwaysReturned] asserts that all matching calls to a method returned
- * a value that matched [value].
- */
-Matcher alwaysReturned(value) =>
-    new _ResultSetMatcher(Action.RETURN, wrapMatcher(value), _Frequency.ALL);
-
-/**
- *[sometimeReturned] asserts that at least one matching call to a method
- * returned a value that matched [value].
- */
-Matcher sometimeReturned(value) =>
-    new _ResultSetMatcher(Action.RETURN, wrapMatcher(value), _Frequency.SOME);
-
-/**
- *[neverReturned] asserts that no matching calls to a method returned
- * a value that matched [value].
- */
-Matcher neverReturned(value) =>
-    new _ResultSetMatcher(Action.RETURN, wrapMatcher(value), _Frequency.NONE);
-
-/**
- *[alwaysThrew] asserts that all matching calls to a method threw
- * a value that matched [value].
- */
-Matcher alwaysThrew(value) =>
-    new _ResultSetMatcher(Action.THROW, wrapMatcher(value), _Frequency.ALL);
-
-/**
- *[sometimeThrew] asserts that at least one matching call to a method threw
- * a value that matched [value].
- */
-Matcher sometimeThrew(value) =>
-  new _ResultSetMatcher(Action.THROW, wrapMatcher(value), _Frequency.SOME);
-
-/**
- *[neverThrew] asserts that no matching call to a method threw
- * a value that matched [value].
- */
-Matcher neverThrew(value) =>
-  new _ResultSetMatcher(Action.THROW, wrapMatcher(value), _Frequency.NONE);
-
-/** The shared log used for named mocks. */
-LogEntryList sharedLog = null;
-
-/** The base class for all mocked objects. */
-@proxy
-class Mock {
-  /** The mock name. Needed if the log is shared; optional otherwise. */
-  final String name;
-
-  /** The set of [Behavior]s supported. */
-  final LinkedHashMap<String,Behavior> _behaviors;
-
-  /** How to handle unknown method calls - swallow or throw. */
-  final bool _throwIfNoBehavior;
-
-  /** For spys, the real object that we are spying on. */
-  final Object _realObject;
-
-  /** The [log] of calls made. Only used if [name] is null. */
-  LogEntryList log;
-
-  /** Whether to create an audit log or not. */
-  bool _logging;
-
-  bool get logging => _logging;
-  set logging(bool value) {
-    if (value && log == null) {
-      log = new LogEntryList();
-    }
-    _logging = value;
-  }
-
-  /**
-   * Default constructor. Unknown method calls are allowed and logged,
-   * the mock has no name, and has its own log.
-   */
-  Mock() :
-    _throwIfNoBehavior = false, log = null, name = null, _realObject = null,
-    _behaviors = new LinkedHashMap<String,Behavior>() {
-    logging = true;
-  }
-
-  /**
-   * This constructor makes a mock that has a [name] and possibly uses
-   * a shared [log]. If [throwIfNoBehavior] is true, any calls to methods
-   * that have no defined behaviors will throw an exception; otherwise they
-   * will be allowed and logged (but will not do anything).
-   * If [enableLogging] is false, no logging will be done initially (whether
-   * or not a [log] is supplied), but [logging] can be set to true later.
-   */
-  Mock.custom({this.name,
-               this.log,
-               throwIfNoBehavior: false,
-               enableLogging: true})
-      : _throwIfNoBehavior = throwIfNoBehavior, _realObject = null,
-        _behaviors = new LinkedHashMap<String,Behavior>() {
-    if (log != null && name == null) {
-      throw new Exception("Mocks with shared logs must have a name.");
-    }
-    logging = enableLogging;
-  }
-
-  /**
-   * This constructor creates a spy with no user-defined behavior.
-   * This is simply a proxy for a real object that passes calls
-   * through to that real object but captures an audit trail of
-   * calls made to the object that can be queried and validated
-   * later.
-   */
-  Mock.spy(this._realObject, {this.name, this.log})
-    : _behaviors = null,
-     _throwIfNoBehavior = true {
-    logging = true;
-  }
-
-  /**
-   * [when] is used to create a new or extend an existing [Behavior].
-   * A [CallMatcher] [filter] must be supplied, and the [Behavior]s for
-   * that signature are returned (being created first if needed).
-   *
-   * Typical use case:
-   *
-   *     mock.when(callsTo(...)).alwaysReturn(...);
-   */
-  Behavior when(CallMatcher logFilter) {
-    String key = logFilter.toString();
-    if (!_behaviors.containsKey(key)) {
-      Behavior b = new Behavior(logFilter);
-      _behaviors[key] = b;
-      return b;
-    } else {
-      return _behaviors[key];
-    }
-  }
-
-  /**
-   * This is the handler for method calls. We loop through the list
-   * of [Behavior]s, and find the first match that still has return
-   * values available, and then do the action specified by that
-   * return value. If we find no [Behavior] to apply an exception is
-   * thrown.
-   */
-  noSuchMethod(Invocation invocation) {
-    var method = MirrorSystem.getName(invocation.memberName);
-    var args = invocation.positionalArguments;
-    if (invocation.isGetter) {
-      method = 'get $method';
-    } else if (invocation.isSetter) {
-      method = 'set $method';
-      // Remove the trailing '='.
-      if (method[method.length-1] == '=') {
-        method = method.substring(0, method.length - 1);
-      }
-    }
-    if (_behaviors == null) { // Spy.
-      var mirror = reflect(_realObject);
-      try {
-        var result = mirror.delegate(invocation);
-        log.add(new LogEntry(name, method, args, Action.PROXY, result));
-        return result;
-      } catch (e) {
-        log.add(new LogEntry(name, method, args, Action.THROW, e));
-        throw e;
-      }
-    }
-    bool matchedMethodName = false;
-    Map matchState = {};
-    for (String k in _behaviors.keys) {
-      Behavior b = _behaviors[k];
-      if (b.matcher.nameFilter.matches(method, matchState)) {
-        matchedMethodName = true;
-      }
-      if (b.matches(method, args)) {
-        List actions = b.actions;
-        if (actions == null || actions.length == 0) {
-          continue; // No return values left in this Behavior.
-        }
-        // Get the first response.
-        Responder response = actions[0];
-        // If it is exhausted, remove it from the list.
-        // Note that for endlessly repeating values, we started the count at
-        // 0, so we get a potentially useful value here, which is the
-        // (negation of) the number of times we returned the value.
-        if (--response.count == 0) {
-          actions.removeRange(0, 1);
-        }
-        // Do the response.
-        Action action = response.action;
-        var value = response.value;
-        if (action == Action.RETURN) {
-          if (_logging && b.logging) {
-            log.add(new LogEntry(name, method, args, action, value));
-          }
-          return value;
-        } else if (action == Action.THROW) {
-          if (_logging && b.logging) {
-            log.add(new LogEntry(name, method, args, action, value));
-          }
-          throw value;
-        } else if (action == Action.PROXY) {
-          // TODO(gram): Replace all this with:
-          //     var rtn = reflect(value).apply(invocation.positionalArguments,
-          //         invocation.namedArguments);
-          // once that is supported.
-          var rtn;
-          switch (args.length) {
-            case 0:
-              rtn = value();
-              break;
-            case 1:
-              rtn = value(args[0]);
-              break;
-            case 2:
-              rtn = value(args[0], args[1]);
-              break;
-            case 3:
-              rtn = value(args[0], args[1], args[2]);
-              break;
-            case 4:
-              rtn = value(args[0], args[1], args[2], args[3]);
-              break;
-            case 5:
-              rtn = value(args[0], args[1], args[2], args[3], args[4]);
-              break;
-            case 6:
-              rtn = value(args[0], args[1], args[2], args[3],
-                  args[4], args[5]);
-              break;
-            case 7:
-              rtn = value(args[0], args[1], args[2], args[3],
-                  args[4], args[5], args[6]);
-              break;
-            case 8:
-              rtn = value(args[0], args[1], args[2], args[3],
-                  args[4], args[5], args[6], args[7]);
-              break;
-            case 9:
-              rtn = value(args[0], args[1], args[2], args[3],
-                  args[4], args[5], args[6], args[7], args[8]);
-              break;
-            case 9:
-              rtn = value(args[0], args[1], args[2], args[3],
-                  args[4], args[5], args[6], args[7], args[8], args[9]);
-              break;
-            default:
-              throw new Exception(
-                  "Cannot proxy calls with more than 10 parameters.");
-          }
-          if (_logging && b.logging) {
-            log.add(new LogEntry(name, method, args, action, rtn));
-          }
-          return rtn;
-        }
-      }
-    }
-    if (matchedMethodName) {
-      // User did specify behavior for this method, but all the
-      // actions are exhausted. This is considered an error.
-      throw new Exception('No more actions for method '
-          '${_qualifiedName(name, method)}.');
-    } else if (_throwIfNoBehavior) {
-      throw new Exception('No behavior specified for method '
-          '${_qualifiedName(name, method)}.');
-    }
-    // Otherwise user hasn't specified behavior for this method; we don't throw
-    // so we can underspecify.
-    if (_logging) {
-      log.add(new LogEntry(name, method, args, Action.IGNORE));
-    }
-  }
-
-  /** [verifyZeroInteractions] returns true if no calls were made */
-  bool verifyZeroInteractions() {
-    if (log == null) {
-      // This means we created the mock with logging off and have never turned
-      // it on, so it doesn't make sense to verify behavior on such a mock.
-      throw new
-          Exception("Can't verify behavior when logging was never enabled.");
-    }
-    return log.logs.length == 0;
-  }
-
-  /**
-   * [getLogs] extracts all calls from the call log that match the
-   * [logFilter], and returns the matching list of [LogEntry]s. If
-   * [destructive] is false (the default) the matching calls are left
-   * in the log, else they are removed. Removal allows us to verify a
-   * set of interactions and then verify that there are no other
-   * interactions left. [actionMatcher] can be used to further
-   * restrict the returned logs based on the action the mock performed.
-   * [logFilter] can be a [CallMatcher] or a predicate function that
-   * takes a [LogEntry] and returns a bool.
-   *
-   * Typical usage:
-   *
-   *     getLogs(callsTo(...)).verify(...);
-   */
-  LogEntryList getLogs([CallMatcher logFilter,
-                        Matcher actionMatcher,
-                        bool destructive = false]) {
-    if (log == null) {
-      // This means we created the mock with logging off and have never turned
-      // it on, so it doesn't make sense to get logs from such a mock.
-      throw new
-          Exception("Can't retrieve logs when logging was never enabled.");
-    } else {
-      return log.getMatches(name, logFilter, actionMatcher, destructive);
-    }
-  }
-
-  /**
-   * Useful shorthand method that creates a [CallMatcher] from its arguments
-   * and then calls [getLogs].
-   */
-  LogEntryList calls(method,
-                      [arg0 = _noArg,
-                       arg1 = _noArg,
-                       arg2 = _noArg,
-                       arg3 = _noArg,
-                       arg4 = _noArg,
-                       arg5 = _noArg,
-                       arg6 = _noArg,
-                       arg7 = _noArg,
-                       arg8 = _noArg,
-                       arg9 = _noArg]) =>
-      getLogs(callsTo(method, arg0, arg1, arg2, arg3, arg4,
-          arg5, arg6, arg7, arg8, arg9));
-
-  /** Clear the behaviors for the Mock. */
-  void resetBehavior() => _behaviors.clear();
-
-  /** Clear the logs for the Mock. */
-  void clearLogs() {
-    if (log != null) {
-      if (name == null) { // This log is not shared.
-        log.logs.clear();
-      } else { // This log may be shared.
-        log.logs = log.logs.where((e) => e.mockName != name).toList();
-      }
-    }
-  }
-
-  /** Clear both logs and behavior. */
-  void reset() {
-    resetBehavior();
-    clearLogs();
-  }
-}
+export 'package:mock/mock.dart';