flutter/dev/bots/test/analyze-test-input/root/packages/flutter/lib/stopwatch.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import '../../foo/stopwatch_external_lib.dart' as externallib;

typedef ExternalStopwatchConstructor = externallib.MyStopwatch Function();

class StopwatchAtHome extends Stopwatch {
  StopwatchAtHome();
  StopwatchAtHome.create() : this();

  Stopwatch get stopwatch => this;
}

void testNoStopwatches(Stopwatch stopwatch) {
  // OK for now, but we probably want to catch public APIs that take a Stopwatch?
  stopwatch.runtimeType;
  // Bad: introducing Stopwatch from dart:core.
  final Stopwatch localVariable = Stopwatch(); // ERROR: Stopwatch()
  // Bad: introducing Stopwatch from dart:core.
  Stopwatch().runtimeType; // ERROR: Stopwatch()

  (localVariable..runtimeType) // OK: not directly introducing Stopwatch.
      .runtimeType;

  // Bad: introducing a Stopwatch subclass.
  StopwatchAtHome().runtimeType; // ERROR: StopwatchAtHome()

  // OK: not directly introducing Stopwatch.
  Stopwatch anotherStopwatch = stopwatch;
  // Bad: introducing a Stopwatch constructor.
  StopwatchAtHome Function() constructor = StopwatchAtHome.new; // ERROR: StopwatchAtHome.new
  assert(() {
    anotherStopwatch = constructor()..runtimeType;
    // Bad: introducing a Stopwatch constructor.
    constructor = StopwatchAtHome.create; // ERROR: StopwatchAtHome.create
    anotherStopwatch = constructor()..runtimeType;
    return true;
  }());
  anotherStopwatch.runtimeType;

  // Bad: introducing an external Stopwatch constructor.
  externallib.MyStopwatch.create(); // ERROR: externallib.MyStopwatch.create()
  ExternalStopwatchConstructor? externalConstructor;

  assert(() {
    // Bad: introducing an external Stopwatch constructor.
    externalConstructor = externallib.MyStopwatch.new; // ERROR: externallib.MyStopwatch.new
    return true;
  }());
  externalConstructor?.call();

  // Bad: introducing an external Stopwatch.
  externallib.stopwatch.runtimeType; // ERROR: externallib.stopwatch
  // Bad: calling an external function that returns a Stopwatch.
  externallib.createMyStopwatch().runtimeType; // ERROR: externallib.createMyStopwatch()
  // Bad: calling an external function that returns a Stopwatch.
  externallib.createStopwatch().runtimeType; // ERROR: externallib.createStopwatch()
  // Bad: introducing the tear-off form of an external function that returns a Stopwatch.
  externalConstructor = externallib.createMyStopwatch; // ERROR: externallib.createMyStopwatch

  // OK: existing instance.
  constructor.call().stopwatch;
}

void testStopwatchIgnore(Stopwatch stopwatch) {
  Stopwatch().runtimeType; // flutter_ignore: stopwatch (see analyze.dart)
  Stopwatch().runtimeType; // flutter_ignore: some_other_ignores, stopwatch (see analyze.dart)
}