ui/gfx/display_change_notifier_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/gfx/display_change_notifier.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/gfx/display.h"
   9 #include "ui/gfx/display_observer.h"
  10
  11 namespace gfx {
  12
  13 class MockDisplayObserver : public DisplayObserver {
  14  public:
  15   MockDisplayObserver()
  16     : display_added_(0),
  17       display_removed_(0),
  18       display_changed_(0),
  19       latest_metrics_change_(DisplayObserver::DISPLAY_METRIC_NONE)
  20   {}
  21
  22   virtual ~MockDisplayObserver() { }
  23
  24   virtual void OnDisplayAdded(const Display& display) OVERRIDE {
  25     display_added_++;
  26   }
  27
  28   virtual void OnDisplayRemoved(const Display& display) OVERRIDE {
  29     display_removed_++;
  30   }
  31
  32   virtual void OnDisplayMetricsChanged(const Display& display,
  33                                        uint32_t metrics) OVERRIDE {
  34     display_changed_++;
  35     latest_metrics_change_ = metrics;
  36   }
  37
  38   int display_added() const {
  39     return display_added_;
  40   }
  41
  42   int display_removed() const {
  43     return display_removed_;
  44   }
  45
  46   int display_changed() const {
  47     return display_changed_;
  48   }
  49
  50   uint32_t latest_metrics_change() const {
  51     return latest_metrics_change_;
  52   }
  53
  54  protected:
  55   int display_added_;
  56   int display_removed_;
  57   int display_changed_;
  58   uint32_t latest_metrics_change_;
  59
  60   DISALLOW_COPY_AND_ASSIGN(MockDisplayObserver);
  61 };
  62
  63 TEST(DisplayChangeNotifierTest, AddObserver_Smoke) {
  64   DisplayChangeNotifier change_notifier;
  65   MockDisplayObserver observer;
  66
  67   change_notifier.NotifyDisplaysChanged(
  68     std::vector<Display>(), std::vector<Display>(1, Display()));
  69   EXPECT_EQ(0, observer.display_added());
  70
  71   change_notifier.AddObserver(&observer);
  72   change_notifier.NotifyDisplaysChanged(
  73     std::vector<Display>(), std::vector<Display>(1, Display()));
  74   EXPECT_EQ(1, observer.display_added());
  75 }
  76
  77 TEST(DisplayChangeNotifierTest, AddObserver_Null) {
  78   DisplayChangeNotifier change_notifier;
  79
  80   change_notifier.AddObserver(NULL);
  81   // Should not crash.
  82 }
  83
  84 TEST(DisplayChangeNotifier, RemoveObserver_Smoke) {
  85   DisplayChangeNotifier change_notifier;
  86   MockDisplayObserver observer;
  87
  88   change_notifier.NotifyDisplaysChanged(
  89     std::vector<Display>(), std::vector<Display>(1, Display()));
  90   EXPECT_EQ(0, observer.display_added());
  91
  92   change_notifier.AddObserver(&observer);
  93   change_notifier.RemoveObserver(&observer);
  94
  95   change_notifier.NotifyDisplaysChanged(
  96     std::vector<Display>(), std::vector<Display>(1, Display()));
  97   EXPECT_EQ(0, observer.display_added());
  98 }
  99
 100 TEST(DisplayChangeNotifierTest, RemoveObserver_Null) {
 101   DisplayChangeNotifier change_notifier;
 102
 103   change_notifier.RemoveObserver(NULL);
 104   // Should not crash.
 105 }
 106
 107 TEST(DisplayChangeNotifierTest, RemoveObserver_Unknown) {
 108   DisplayChangeNotifier change_notifier;
 109   MockDisplayObserver observer;
 110
 111   change_notifier.RemoveObserver(&observer);
 112   // Should not crash.
 113 }
 114
 115 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Removed) {
 116   DisplayChangeNotifier change_notifier;
 117
 118   // If the previous display array is empty, no removal.
 119   {
 120     MockDisplayObserver observer;
 121     change_notifier.AddObserver(&observer);
 122
 123     std::vector<Display> old_displays, new_displays;
 124     new_displays.push_back(Display());
 125
 126     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 127     EXPECT_EQ(0, observer.display_removed());
 128
 129     change_notifier.RemoveObserver(&observer);
 130   }
 131
 132   // If the previous and new display array are empty, no removal.
 133   {
 134     MockDisplayObserver observer;
 135     change_notifier.AddObserver(&observer);
 136
 137     std::vector<Display> old_displays, new_displays;
 138
 139     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 140     EXPECT_EQ(0, observer.display_removed());
 141
 142     change_notifier.RemoveObserver(&observer);
 143   }
 144
 145   // If the new display array is empty, there are as many removal as old
 146   // displays.
 147   {
 148     MockDisplayObserver observer;
 149     change_notifier.AddObserver(&observer);
 150
 151     std::vector<Display> old_displays, new_displays;
 152     old_displays.push_back(Display());
 153     old_displays.push_back(Display());
 154     old_displays.push_back(Display());
 155
 156     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 157     EXPECT_EQ(3, observer.display_removed());
 158
 159     change_notifier.RemoveObserver(&observer);
 160   }
 161
 162   // If displays don't use ids, as long as the new display array has one
 163   // element, there are no removals.
 164   {
 165     MockDisplayObserver observer;
 166     change_notifier.AddObserver(&observer);
 167
 168     std::vector<Display> old_displays, new_displays;
 169     old_displays.push_back(Display());
 170     old_displays.push_back(Display());
 171     old_displays.push_back(Display());
 172     new_displays.push_back(Display());
 173
 174     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 175     EXPECT_EQ(0, observer.display_removed());
 176
 177     change_notifier.RemoveObserver(&observer);
 178   }
 179
 180   // If displays use ids (and they are unique), ids not present in the new
 181   // display array will be marked as removed.
 182   {
 183     MockDisplayObserver observer;
 184     change_notifier.AddObserver(&observer);
 185
 186     std::vector<Display> old_displays, new_displays;
 187     old_displays.push_back(Display(1));
 188     old_displays.push_back(Display(2));
 189     old_displays.push_back(Display(3));
 190     new_displays.push_back(Display(2));
 191
 192     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 193     EXPECT_EQ(2, observer.display_removed());
 194
 195     change_notifier.RemoveObserver(&observer);
 196   }
 197 }
 198
 199 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Added) {
 200   DisplayChangeNotifier change_notifier;
 201
 202   // If the new display array is empty, no addition.
 203   {
 204     MockDisplayObserver observer;
 205     change_notifier.AddObserver(&observer);
 206
 207     std::vector<Display> old_displays, new_displays;
 208     old_displays.push_back(Display());
 209
 210     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 211     EXPECT_EQ(0, observer.display_added());
 212
 213     change_notifier.RemoveObserver(&observer);
 214   }
 215
 216   // If the old and new display arrays are empty, no addition.
 217   {
 218     MockDisplayObserver observer;
 219     change_notifier.AddObserver(&observer);
 220
 221     std::vector<Display> old_displays, new_displays;
 222
 223     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 224     EXPECT_EQ(0, observer.display_added());
 225
 226     change_notifier.RemoveObserver(&observer);
 227   }
 228
 229   // If the old display array is empty, there are as many addition as new
 230   // displays.
 231   {
 232     MockDisplayObserver observer;
 233     change_notifier.AddObserver(&observer);
 234
 235     std::vector<Display> old_displays, new_displays;
 236     new_displays.push_back(Display());
 237     new_displays.push_back(Display());
 238     new_displays.push_back(Display());
 239
 240     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 241     EXPECT_EQ(3, observer.display_added());
 242
 243     change_notifier.RemoveObserver(&observer);
 244   }
 245
 246   // If displays don't use ids, as long as the old display array has one
 247   // element, there are no additions.
 248   {
 249     MockDisplayObserver observer;
 250     change_notifier.AddObserver(&observer);
 251
 252     std::vector<Display> old_displays, new_displays;
 253     old_displays.push_back(Display());
 254     new_displays.push_back(Display());
 255     new_displays.push_back(Display());
 256     new_displays.push_back(Display());
 257
 258     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 259     EXPECT_EQ(0, observer.display_added());
 260
 261     change_notifier.RemoveObserver(&observer);
 262   }
 263
 264   // If displays use ids (and they are unique), ids not present in the old
 265   // display array will be marked as added.
 266   {
 267     MockDisplayObserver observer;
 268     change_notifier.AddObserver(&observer);
 269
 270     std::vector<Display> old_displays, new_displays;
 271     old_displays.push_back(Display(1));
 272     new_displays.push_back(Display(1));
 273     new_displays.push_back(Display(2));
 274     new_displays.push_back(Display(3));
 275
 276     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 277     EXPECT_EQ(2, observer.display_added());
 278
 279     change_notifier.RemoveObserver(&observer);
 280   }
 281 }
 282
 283 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Smoke) {
 284   DisplayChangeNotifier change_notifier;
 285
 286   // If the old display array is empty, no change.
 287   {
 288     MockDisplayObserver observer;
 289     change_notifier.AddObserver(&observer);
 290
 291     std::vector<Display> old_displays, new_displays;
 292     new_displays.push_back(Display());
 293
 294     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 295     EXPECT_EQ(0, observer.display_changed());
 296
 297     change_notifier.RemoveObserver(&observer);
 298   }
 299
 300   // If the new display array is empty, no change.
 301   {
 302     MockDisplayObserver observer;
 303     change_notifier.AddObserver(&observer);
 304
 305     std::vector<Display> old_displays, new_displays;
 306     old_displays.push_back(Display());
 307
 308     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 309     EXPECT_EQ(0, observer.display_changed());
 310
 311     change_notifier.RemoveObserver(&observer);
 312   }
 313
 314   // If the old and new display arrays are empty, no change.
 315   {
 316     MockDisplayObserver observer;
 317     change_notifier.AddObserver(&observer);
 318
 319     std::vector<Display> old_displays, new_displays;
 320
 321     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 322     EXPECT_EQ(0, observer.display_changed());
 323
 324     change_notifier.RemoveObserver(&observer);
 325   }
 326
 327   // If there is an intersection between old and new displays but there are no
 328   // metrics changes, there is no display change.
 329   {
 330     MockDisplayObserver observer;
 331     change_notifier.AddObserver(&observer);
 332
 333     std::vector<Display> old_displays, new_displays;
 334     old_displays.push_back(Display(1));
 335     new_displays.push_back(Display(1));
 336     new_displays.push_back(Display(2));
 337     new_displays.push_back(Display(3));
 338
 339     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 340     EXPECT_EQ(0, observer.display_changed());
 341
 342     change_notifier.RemoveObserver(&observer);
 343   }
 344 }
 345
 346 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Bounds) {
 347   DisplayChangeNotifier change_notifier;
 348
 349   {
 350     MockDisplayObserver observer;
 351     change_notifier.AddObserver(&observer);
 352
 353     std::vector<Display> old_displays, new_displays;
 354     old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 355     new_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 356
 357     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 358     EXPECT_EQ(0, observer.display_changed());
 359
 360     change_notifier.RemoveObserver(&observer);
 361   }
 362
 363   {
 364     MockDisplayObserver observer;
 365     change_notifier.AddObserver(&observer);
 366
 367     std::vector<Display> old_displays, new_displays;
 368     old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 369     new_displays.push_back(Display(1, Rect(10, 10, 300, 300)));
 370
 371     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 372     EXPECT_EQ(1, observer.display_changed());
 373     uint32_t metrics_change = DisplayObserver::DISPLAY_METRIC_BOUNDS |
 374                                   DisplayObserver::DISPLAY_METRIC_WORK_AREA;
 375     EXPECT_EQ(metrics_change, observer.latest_metrics_change());
 376
 377     change_notifier.RemoveObserver(&observer);
 378   }
 379
 380   {
 381     MockDisplayObserver observer;
 382     change_notifier.AddObserver(&observer);
 383
 384     std::vector<Display> old_displays, new_displays;
 385     old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 386     new_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 387     new_displays[0].set_bounds(Rect(10, 10, 300, 300));
 388
 389     change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 390     EXPECT_EQ(1, observer.display_changed());
 391     EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_BOUNDS,
 392               observer.latest_metrics_change());
 393
 394     change_notifier.RemoveObserver(&observer);
 395   }
 396 }
 397
 398 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Rotation) {
 399   DisplayChangeNotifier change_notifier;
 400   MockDisplayObserver observer;
 401   change_notifier.AddObserver(&observer);
 402
 403   std::vector<Display> old_displays, new_displays;
 404   old_displays.push_back(Display(1));
 405   old_displays[0].SetRotationAsDegree(0);
 406   new_displays.push_back(Display(1));
 407   new_displays[0].SetRotationAsDegree(180);
 408
 409   change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 410   EXPECT_EQ(1, observer.display_changed());
 411   EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_ROTATION,
 412             observer.latest_metrics_change());
 413 }
 414
 415 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_WorkArea) {
 416   DisplayChangeNotifier change_notifier;
 417   MockDisplayObserver observer;
 418   change_notifier.AddObserver(&observer);
 419
 420   std::vector<Display> old_displays, new_displays;
 421   old_displays.push_back(Display(1));
 422   old_displays[0].set_work_area(Rect(0, 0, 200, 200));
 423   new_displays.push_back(Display(1));
 424   new_displays[0].set_work_area(Rect(20, 20, 300, 300));
 425
 426   change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 427   EXPECT_EQ(1, observer.display_changed());
 428   EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_WORK_AREA,
 429             observer.latest_metrics_change());
 430 }
 431
 432 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_DSF) {
 433   DisplayChangeNotifier change_notifier;
 434   MockDisplayObserver observer;
 435   change_notifier.AddObserver(&observer);
 436
 437   std::vector<Display> old_displays, new_displays;
 438   old_displays.push_back(Display(1));
 439   old_displays[0].set_device_scale_factor(1.f);
 440   new_displays.push_back(Display(1));
 441   new_displays[0].set_device_scale_factor(2.f);
 442
 443   change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 444   EXPECT_EQ(1, observer.display_changed());
 445   EXPECT_EQ(DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR,
 446             observer.latest_metrics_change());
 447 }
 448
 449 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Multi_Displays) {
 450   DisplayChangeNotifier change_notifier;
 451   MockDisplayObserver observer;
 452   change_notifier.AddObserver(&observer);
 453
 454   std::vector<Display> old_displays, new_displays;
 455   old_displays.push_back(Display(1));
 456   old_displays.push_back(Display(2));
 457   old_displays.push_back(Display(3));
 458   new_displays.push_back(Display(1));
 459   new_displays.push_back(Display(2));
 460   new_displays.push_back(Display(3));
 461
 462   old_displays[0].set_device_scale_factor(1.f);
 463   new_displays[0].set_device_scale_factor(2.f);
 464
 465   old_displays[1].set_bounds(Rect(0, 0, 200, 200));
 466   new_displays[1].set_bounds(Rect(0, 0, 400, 400));
 467
 468   old_displays[2].SetRotationAsDegree(0);
 469   new_displays[2].SetRotationAsDegree(90);
 470
 471   change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 472   EXPECT_EQ(3, observer.display_changed());
 473 }
 474
 475 TEST(DisplayChangeNotifierTest, NotifyDisplaysChanged_Changed_Multi_Metrics) {
 476   DisplayChangeNotifier change_notifier;
 477   MockDisplayObserver observer;
 478   change_notifier.AddObserver(&observer);
 479
 480   std::vector<Display> old_displays, new_displays;
 481   old_displays.push_back(Display(1, Rect(0, 0, 200, 200)));
 482   old_displays[0].set_device_scale_factor(1.f);
 483   old_displays[0].SetRotationAsDegree(0);
 484
 485   new_displays.push_back(Display(1, Rect(100, 100, 200, 200)));
 486   new_displays[0].set_device_scale_factor(2.f);
 487   new_displays[0].SetRotationAsDegree(90);
 488
 489   change_notifier.NotifyDisplaysChanged(old_displays, new_displays);
 490   EXPECT_EQ(1, observer.display_changed());
 491   uint32_t metrics = DisplayObserver::DISPLAY_METRIC_BOUNDS |
 492                          DisplayObserver::DISPLAY_METRIC_ROTATION |
 493                          DisplayObserver::DISPLAY_METRIC_WORK_AREA |
 494                          DisplayObserver::DISPLAY_METRIC_DEVICE_SCALE_FACTOR;
 495   EXPECT_EQ(metrics, observer.latest_metrics_change());
 496 }
 497
 498 } // namespace gfx