ui/views/layout/box_layout_unittest.cc

   1 // Copyright (c) 2012 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/views/layout/box_layout.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8 #include "ui/views/test/test_views.h"
   9 #include "ui/views/view.h"
  10
  11 namespace views {
  12
  13 namespace {
  14
  15 class BoxLayoutTest : public testing::Test {
  16  public:
  17   void SetUp() override { host_.reset(new View); }
  18
  19   scoped_ptr<View> host_;
  20 };
  21
  22 }  // namespace
  23
  24 TEST_F(BoxLayoutTest, Empty) {
  25   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 20);
  26   host_->SetLayoutManager(layout);
  27   EXPECT_EQ(gfx::Size(20, 20), layout->GetPreferredSize(host_.get()));
  28 }
  29
  30 TEST_F(BoxLayoutTest, AlignmentHorizontal) {
  31   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
  32   host_->SetLayoutManager(layout);
  33   View* v1 = new StaticSizedView(gfx::Size(10, 20));
  34   host_->AddChildView(v1);
  35   View* v2 = new StaticSizedView(gfx::Size(10, 10));
  36   host_->AddChildView(v2);
  37   EXPECT_EQ(gfx::Size(20, 20), layout->GetPreferredSize(host_.get()));
  38   host_->SetBounds(0, 0, 20, 20);
  39   host_->Layout();
  40   EXPECT_EQ(gfx::Rect(0, 0, 10, 20), v1->bounds());
  41   EXPECT_EQ(gfx::Rect(10, 0, 10, 20), v2->bounds());
  42 }
  43
  44 TEST_F(BoxLayoutTest, AlignmentVertical) {
  45   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
  46   host_->SetLayoutManager(layout);
  47   View* v1 = new StaticSizedView(gfx::Size(20, 10));
  48   host_->AddChildView(v1);
  49   View* v2 = new StaticSizedView(gfx::Size(10, 10));
  50   host_->AddChildView(v2);
  51   EXPECT_EQ(gfx::Size(20, 20), layout->GetPreferredSize(host_.get()));
  52   host_->SetBounds(0, 0, 20, 20);
  53   host_->Layout();
  54   EXPECT_EQ(gfx::Rect(0, 0, 20, 10), v1->bounds());
  55   EXPECT_EQ(gfx::Rect(0, 10, 20, 10), v2->bounds());
  56 }
  57
  58 TEST_F(BoxLayoutTest, SetInsideBorderInsets) {
  59   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 20, 0);
  60   host_->SetLayoutManager(layout);
  61   View* v1 = new StaticSizedView(gfx::Size(10, 20));
  62   host_->AddChildView(v1);
  63   View* v2 = new StaticSizedView(gfx::Size(10, 10));
  64   host_->AddChildView(v2);
  65   EXPECT_EQ(gfx::Size(40, 60), layout->GetPreferredSize(host_.get()));
  66   host_->SetBounds(0, 0, 40, 60);
  67   host_->Layout();
  68   EXPECT_EQ(gfx::Rect(10, 20, 10, 20), v1->bounds());
  69   EXPECT_EQ(gfx::Rect(20, 20, 10, 20), v2->bounds());
  70
  71   layout->set_inside_border_insets(
  72       gfx::Insets(5, 10, 15, 20));
  73   EXPECT_EQ(gfx::Size(50, 40), layout->GetPreferredSize(host_.get()));
  74   host_->SetBounds(0, 0, 50, 40);
  75   host_->Layout();
  76   EXPECT_EQ(gfx::Rect(10, 5, 10, 20), v1->bounds());
  77   EXPECT_EQ(gfx::Rect(20, 5, 10, 20), v2->bounds());
  78 }
  79
  80 TEST_F(BoxLayoutTest, Spacing) {
  81   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 7, 7, 8);
  82   host_->SetLayoutManager(layout);
  83   View* v1 = new StaticSizedView(gfx::Size(10, 20));
  84   host_->AddChildView(v1);
  85   View* v2 = new StaticSizedView(gfx::Size(10, 20));
  86   host_->AddChildView(v2);
  87   EXPECT_EQ(gfx::Size(42, 34), layout->GetPreferredSize(host_.get()));
  88   host_->SetBounds(0, 0, 100, 100);
  89   host_->Layout();
  90   EXPECT_EQ(gfx::Rect(7, 7, 10, 86), v1->bounds());
  91   EXPECT_EQ(gfx::Rect(25, 7, 10, 86), v2->bounds());
  92 }
  93
  94 TEST_F(BoxLayoutTest, Overflow) {
  95   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
  96   host_->SetLayoutManager(layout);
  97   View* v1 = new StaticSizedView(gfx::Size(20, 20));
  98   host_->AddChildView(v1);
  99   View* v2 = new StaticSizedView(gfx::Size(10, 20));
 100   host_->AddChildView(v2);
 101   host_->SetBounds(0, 0, 10, 10);
 102
 103   // Overflows by positioning views at the start and truncating anything that
 104   // doesn't fit.
 105   host_->Layout();
 106   EXPECT_EQ(gfx::Rect(0, 0, 10, 10), v1->bounds());
 107   EXPECT_EQ(gfx::Rect(0, 0, 0, 0), v2->bounds());
 108
 109   // All values of main axis alignment should overflow in the same manner.
 110   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 111   host_->Layout();
 112   EXPECT_EQ(gfx::Rect(0, 0, 10, 10), v1->bounds());
 113   EXPECT_EQ(gfx::Rect(0, 0, 0, 0), v2->bounds());
 114
 115   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 116   host_->Layout();
 117   EXPECT_EQ(gfx::Rect(0, 0, 10, 10), v1->bounds());
 118   EXPECT_EQ(gfx::Rect(0, 0, 0, 0), v2->bounds());
 119
 120   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 121   host_->Layout();
 122   EXPECT_EQ(gfx::Rect(0, 0, 10, 10), v1->bounds());
 123   EXPECT_EQ(gfx::Rect(0, 0, 0, 0), v2->bounds());
 124 }
 125
 126 TEST_F(BoxLayoutTest, NoSpace) {
 127   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 128   host_->SetLayoutManager(layout);
 129   View* childView = new StaticSizedView(gfx::Size(20, 20));
 130   host_->AddChildView(childView);
 131   host_->SetBounds(0, 0, 10, 10);
 132   host_->Layout();
 133   EXPECT_EQ(gfx::Rect(0, 0, 0, 0), childView->bounds());
 134 }
 135
 136 TEST_F(BoxLayoutTest, InvisibleChild) {
 137   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 138   host_->SetLayoutManager(layout);
 139   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 140   v1->SetVisible(false);
 141   host_->AddChildView(v1);
 142   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 143   host_->AddChildView(v2);
 144   EXPECT_EQ(gfx::Size(30, 30), layout->GetPreferredSize(host_.get()));
 145   host_->SetBounds(0, 0, 30, 30);
 146   host_->Layout();
 147   EXPECT_EQ(gfx::Rect(10, 10, 10, 10), v2->bounds());
 148 }
 149
 150 TEST_F(BoxLayoutTest, UseHeightForWidth) {
 151   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
 152   host_->SetLayoutManager(layout);
 153   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 154   host_->AddChildView(v1);
 155   ProportionallySizedView* v2 = new ProportionallySizedView(2);
 156   v2->set_preferred_width(10);
 157   host_->AddChildView(v2);
 158   EXPECT_EQ(gfx::Size(20, 50), layout->GetPreferredSize(host_.get()));
 159
 160   host_->SetBounds(0, 0, 20, 50);
 161   host_->Layout();
 162   EXPECT_EQ(gfx::Rect(0, 0, 20, 10), v1->bounds());
 163   EXPECT_EQ(gfx::Rect(0, 10, 20, 40), v2->bounds());
 164
 165   EXPECT_EQ(110, layout->GetPreferredHeightForWidth(host_.get(), 50));
 166
 167   // Test without horizontal stretching of the views.
 168   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_END);
 169   EXPECT_EQ(gfx::Size(20, 30).ToString(),
 170             layout->GetPreferredSize(host_.get()).ToString());
 171
 172   host_->SetBounds(0, 0, 20, 30);
 173   host_->Layout();
 174   EXPECT_EQ(gfx::Rect(0, 0, 20, 10), v1->bounds());
 175   EXPECT_EQ(gfx::Rect(10, 10, 10, 20), v2->bounds());
 176
 177   EXPECT_EQ(30, layout->GetPreferredHeightForWidth(host_.get(), 50));
 178 }
 179
 180 TEST_F(BoxLayoutTest, EmptyPreferredSize) {
 181   for (size_t i = 0; i < 2; i++) {
 182     BoxLayout::Orientation orientation = i == 0 ? BoxLayout::kHorizontal :
 183                                                   BoxLayout::kVertical;
 184     host_->RemoveAllChildViews(true);
 185     host_->SetLayoutManager(new BoxLayout(orientation, 0, 0, 5));
 186     View* v1 = new StaticSizedView(gfx::Size());
 187     host_->AddChildView(v1);
 188     View* v2 = new StaticSizedView(gfx::Size(10, 10));
 189     host_->AddChildView(v2);
 190     host_->SizeToPreferredSize();
 191     host_->Layout();
 192
 193     EXPECT_EQ(v2->GetPreferredSize().width(), host_->bounds().width()) << i;
 194     EXPECT_EQ(v2->GetPreferredSize().height(), host_->bounds().height()) << i;
 195     EXPECT_EQ(v1->GetPreferredSize().width(), v1->bounds().width()) << i;
 196     EXPECT_EQ(v1->GetPreferredSize().height(), v1->bounds().height()) << i;
 197     EXPECT_EQ(v2->GetPreferredSize().width(), v2->bounds().width()) << i;
 198     EXPECT_EQ(v2->GetPreferredSize().height(), v2->bounds().height()) << i;
 199   }
 200 }
 201
 202 TEST_F(BoxLayoutTest, MainAxisAlignmentHorizontal) {
 203   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 204   host_->SetLayoutManager(layout);
 205
 206   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 207   host_->AddChildView(v1);
 208   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 209   host_->AddChildView(v2);
 210
 211   host_->SetBounds(0, 0, 100, 40);
 212
 213   // Align children to the horizontal start by default.
 214   host_->Layout();
 215   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 216   EXPECT_EQ(gfx::Rect(40, 10, 10, 20).ToString(), v2->bounds().ToString());
 217
 218   // Ensure same results for MAIN_AXIS_ALIGNMENT_START.
 219   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 220   host_->Layout();
 221   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 222   EXPECT_EQ(gfx::Rect(40, 10, 10, 20).ToString(), v2->bounds().ToString());
 223
 224   // Aligns children to the center horizontally.
 225   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 226   host_->Layout();
 227   EXPECT_EQ(gfx::Rect(30, 10, 20, 20).ToString(), v1->bounds().ToString());
 228   EXPECT_EQ(gfx::Rect(60, 10, 10, 20).ToString(), v2->bounds().ToString());
 229
 230   // Aligns children to the end of the host horizontally, accounting for the
 231   // inside border spacing.
 232   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 233   host_->Layout();
 234   EXPECT_EQ(gfx::Rect(50, 10, 20, 20).ToString(), v1->bounds().ToString());
 235   EXPECT_EQ(gfx::Rect(80, 10, 10, 20).ToString(), v2->bounds().ToString());
 236 }
 237
 238 TEST_F(BoxLayoutTest, MainAxisAlignmentVertical) {
 239   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 240   host_->SetLayoutManager(layout);
 241
 242   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 243   host_->AddChildView(v1);
 244   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 245   host_->AddChildView(v2);
 246
 247   host_->SetBounds(0, 0, 40, 100);
 248
 249   // Align children to the vertical start by default.
 250   host_->Layout();
 251   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 252   EXPECT_EQ(gfx::Rect(10, 40, 20, 10).ToString(), v2->bounds().ToString());
 253
 254   // Ensure same results for MAIN_AXIS_ALIGNMENT_START.
 255   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 256   host_->Layout();
 257   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 258   EXPECT_EQ(gfx::Rect(10, 40, 20, 10).ToString(), v2->bounds().ToString());
 259
 260   // Aligns children to the center vertically.
 261   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 262   host_->Layout();
 263   EXPECT_EQ(gfx::Rect(10, 30, 20, 20).ToString(), v1->bounds().ToString());
 264   EXPECT_EQ(gfx::Rect(10, 60, 20, 10).ToString(), v2->bounds().ToString());
 265
 266   // Aligns children to the end of the host vertically, accounting for the
 267   // inside border spacing.
 268   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 269   host_->Layout();
 270   EXPECT_EQ(gfx::Rect(10, 50, 20, 20).ToString(), v1->bounds().ToString());
 271   EXPECT_EQ(gfx::Rect(10, 80, 20, 10).ToString(), v2->bounds().ToString());
 272 }
 273
 274 TEST_F(BoxLayoutTest, CrossAxisAlignmentHorizontal) {
 275   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 276   host_->SetLayoutManager(layout);
 277
 278   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 279   host_->AddChildView(v1);
 280   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 281   host_->AddChildView(v2);
 282
 283   host_->SetBounds(0, 0, 100, 60);
 284
 285   // Stretch children to fill the available height by default.
 286   host_->Layout();
 287   EXPECT_EQ(gfx::Rect(10, 10, 20, 40).ToString(), v1->bounds().ToString());
 288   EXPECT_EQ(gfx::Rect(40, 10, 10, 40).ToString(), v2->bounds().ToString());
 289
 290   // Ensure same results for CROSS_AXIS_ALIGNMENT_STRETCH.
 291   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
 292   host_->Layout();
 293   EXPECT_EQ(gfx::Rect(10, 10, 20, 40).ToString(), v1->bounds().ToString());
 294   EXPECT_EQ(gfx::Rect(40, 10, 10, 40).ToString(), v2->bounds().ToString());
 295
 296   // Aligns children to the start vertically.
 297   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_START);
 298   host_->Layout();
 299   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 300   EXPECT_EQ(gfx::Rect(40, 10, 10, 10).ToString(), v2->bounds().ToString());
 301
 302   // Aligns children to the center vertically.
 303   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 304   host_->Layout();
 305   EXPECT_EQ(gfx::Rect(10, 20, 20, 20).ToString(), v1->bounds().ToString());
 306   EXPECT_EQ(gfx::Rect(40, 25, 10, 10).ToString(), v2->bounds().ToString());
 307
 308   // Aligns children to the end of the host vertically, accounting for the
 309   // inside border spacing.
 310   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_END);
 311   host_->Layout();
 312   EXPECT_EQ(gfx::Rect(10, 30, 20, 20).ToString(), v1->bounds().ToString());
 313   EXPECT_EQ(gfx::Rect(40, 40, 10, 10).ToString(), v2->bounds().ToString());
 314 }
 315
 316 TEST_F(BoxLayoutTest, CrossAxisAlignmentVertical) {
 317   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 318   host_->SetLayoutManager(layout);
 319
 320   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 321   host_->AddChildView(v1);
 322   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 323   host_->AddChildView(v2);
 324
 325   host_->SetBounds(0, 0, 60, 100);
 326
 327   // Stretch children to fill the available width by default.
 328   host_->Layout();
 329   EXPECT_EQ(gfx::Rect(10, 10, 40, 20).ToString(), v1->bounds().ToString());
 330   EXPECT_EQ(gfx::Rect(10, 40, 40, 10).ToString(), v2->bounds().ToString());
 331
 332   // Ensure same results for CROSS_AXIS_ALIGNMENT_STRETCH.
 333   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
 334   host_->Layout();
 335   EXPECT_EQ(gfx::Rect(10, 10, 40, 20).ToString(), v1->bounds().ToString());
 336   EXPECT_EQ(gfx::Rect(10, 40, 40, 10).ToString(), v2->bounds().ToString());
 337
 338   // Aligns children to the start horizontally.
 339   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_START);
 340   host_->Layout();
 341   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 342   EXPECT_EQ(gfx::Rect(10, 40, 10, 10).ToString(), v2->bounds().ToString());
 343
 344   // Aligns children to the center horizontally.
 345   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 346   host_->Layout();
 347   EXPECT_EQ(gfx::Rect(20, 10, 20, 20).ToString(), v1->bounds().ToString());
 348   EXPECT_EQ(gfx::Rect(25, 40, 10, 10).ToString(), v2->bounds().ToString());
 349
 350   // Aligns children to the end of the host horizontally, accounting for the
 351   // inside border spacing.
 352   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_END);
 353   host_->Layout();
 354   EXPECT_EQ(gfx::Rect(30, 10, 20, 20).ToString(), v1->bounds().ToString());
 355   EXPECT_EQ(gfx::Rect(40, 40, 10, 10).ToString(), v2->bounds().ToString());
 356 }
 357
 358 TEST_F(BoxLayoutTest, FlexAll) {
 359   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 360   host_->SetLayoutManager(layout);
 361   layout->SetDefaultFlex(1);
 362
 363   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 364   host_->AddChildView(v1);
 365   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 366   host_->AddChildView(v2);
 367   View* v3 = new StaticSizedView(gfx::Size(30, 30));
 368   host_->AddChildView(v3);
 369   EXPECT_EQ(gfx::Size(100, 50), layout->GetPreferredSize(host_.get()));
 370
 371   host_->SetBounds(0, 0, 120, 50);
 372   host_->Layout();
 373   EXPECT_EQ(gfx::Rect(10, 10, 27, 30).ToString(), v1->bounds().ToString());
 374   EXPECT_EQ(gfx::Rect(47, 10, 16, 30).ToString(), v2->bounds().ToString());
 375   EXPECT_EQ(gfx::Rect(73, 10, 37, 30).ToString(), v3->bounds().ToString());
 376 }
 377
 378 TEST_F(BoxLayoutTest, FlexGrowVertical) {
 379   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 380   host_->SetLayoutManager(layout);
 381
 382   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 383   host_->AddChildView(v1);
 384   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 385   host_->AddChildView(v2);
 386   View* v3 = new StaticSizedView(gfx::Size(30, 30));
 387   host_->AddChildView(v3);
 388
 389   host_->SetBounds(0, 0, 50, 130);
 390
 391   // Views don't fill the available space by default.
 392   host_->Layout();
 393   EXPECT_EQ(gfx::Rect(10, 10, 30, 20).ToString(), v1->bounds().ToString());
 394   EXPECT_EQ(gfx::Rect(10, 40, 30, 10).ToString(), v2->bounds().ToString());
 395   EXPECT_EQ(gfx::Rect(10, 60, 30, 30).ToString(), v3->bounds().ToString());
 396
 397   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 398   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 399   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 400   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 401
 402   for (size_t i = 0; i < main_alignments.size(); ++i) {
 403     layout->set_main_axis_alignment(main_alignments[i]);
 404
 405     // Set the first view to consume all free space.
 406     layout->SetFlexForView(v1, 1);
 407     layout->ClearFlexForView(v2);
 408     layout->ClearFlexForView(v3);
 409     host_->Layout();
 410     EXPECT_EQ(gfx::Rect(10, 10, 30, 50).ToString(), v1->bounds().ToString());
 411     EXPECT_EQ(gfx::Rect(10, 70, 30, 10).ToString(), v2->bounds().ToString());
 412     EXPECT_EQ(gfx::Rect(10, 90, 30, 30).ToString(), v3->bounds().ToString());
 413
 414     // Set the third view to take 2/3s of the free space and leave the first
 415     // view
 416     // with 1/3.
 417     layout->SetFlexForView(v3, 2);
 418     host_->Layout();
 419     EXPECT_EQ(gfx::Rect(10, 10, 30, 30).ToString(), v1->bounds().ToString());
 420     EXPECT_EQ(gfx::Rect(10, 50, 30, 10).ToString(), v2->bounds().ToString());
 421     EXPECT_EQ(gfx::Rect(10, 70, 30, 50).ToString(), v3->bounds().ToString());
 422
 423     // Clear the previously set flex values and set the second view to take all
 424     // the free space.
 425     layout->ClearFlexForView(v1);
 426     layout->SetFlexForView(v2, 1);
 427     layout->ClearFlexForView(v3);
 428     host_->Layout();
 429     EXPECT_EQ(gfx::Rect(10, 10, 30, 20).ToString(), v1->bounds().ToString());
 430     EXPECT_EQ(gfx::Rect(10, 40, 30, 40).ToString(), v2->bounds().ToString());
 431     EXPECT_EQ(gfx::Rect(10, 90, 30, 30).ToString(), v3->bounds().ToString());
 432   }
 433 }
 434
 435 TEST_F(BoxLayoutTest, FlexGrowHorizontalWithRemainder) {
 436   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 437   host_->SetLayoutManager(layout);
 438   layout->SetDefaultFlex(1);
 439   std::vector<View*> views;
 440   for (int i = 0; i < 5; ++i) {
 441     View* view = new StaticSizedView(gfx::Size(10, 10));
 442     views.push_back(view);
 443     host_->AddChildView(view);
 444   }
 445
 446   EXPECT_EQ(gfx::Size(50, 10), layout->GetPreferredSize(host_.get()));
 447
 448   host_->SetBounds(0, 0, 52, 10);
 449   host_->Layout();
 450   // The 2nd and 4th views should have an extra pixel as they correspond to 20.8
 451   // and 41.6 which round up.
 452   EXPECT_EQ(gfx::Rect(0, 0, 10, 10).ToString(), views[0]->bounds().ToString());
 453   EXPECT_EQ(gfx::Rect(10, 0, 11, 10).ToString(), views[1]->bounds().ToString());
 454   EXPECT_EQ(gfx::Rect(21, 0, 10, 10).ToString(), views[2]->bounds().ToString());
 455   EXPECT_EQ(gfx::Rect(31, 0, 11, 10).ToString(), views[3]->bounds().ToString());
 456   EXPECT_EQ(gfx::Rect(42, 0, 10, 10).ToString(), views[4]->bounds().ToString());
 457 }
 458
 459 TEST_F(BoxLayoutTest, FlexGrowHorizontalWithRemainder2) {
 460   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 461   host_->SetLayoutManager(layout);
 462   layout->SetDefaultFlex(1);
 463   std::vector<View*> views;
 464   for (int i = 0; i < 4; ++i) {
 465     View* view = new StaticSizedView(gfx::Size(1, 10));
 466     views.push_back(view);
 467     host_->AddChildView(view);
 468   }
 469
 470   EXPECT_EQ(gfx::Size(4, 10), layout->GetPreferredSize(host_.get()));
 471
 472   host_->SetBounds(0, 0, 10, 10);
 473   host_->Layout();
 474   // The 1st and 3rd views should have an extra pixel as they correspond to 2.5
 475   // and 7.5 which round up.
 476   EXPECT_EQ(gfx::Rect(0, 0, 3, 10).ToString(), views[0]->bounds().ToString());
 477   EXPECT_EQ(gfx::Rect(3, 0, 2, 10).ToString(), views[1]->bounds().ToString());
 478   EXPECT_EQ(gfx::Rect(5, 0, 3, 10).ToString(), views[2]->bounds().ToString());
 479   EXPECT_EQ(gfx::Rect(8, 0, 2, 10).ToString(), views[3]->bounds().ToString());
 480 }
 481
 482 TEST_F(BoxLayoutTest, FlexShrinkHorizontal) {
 483   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 484   host_->SetLayoutManager(layout);
 485
 486   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 487   host_->AddChildView(v1);
 488   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 489   host_->AddChildView(v2);
 490   View* v3 = new StaticSizedView(gfx::Size(30, 30));
 491   host_->AddChildView(v3);
 492
 493   host_->SetBounds(0, 0, 85, 50);
 494
 495   // Truncate width by default.
 496   host_->Layout();
 497   EXPECT_EQ(gfx::Rect(10, 10, 20, 30).ToString(), v1->bounds().ToString());
 498   EXPECT_EQ(gfx::Rect(40, 10, 10, 30).ToString(), v2->bounds().ToString());
 499   EXPECT_EQ(gfx::Rect(60, 10, 15, 30).ToString(), v3->bounds().ToString());
 500
 501   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 502   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 503   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 504   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 505
 506   for (size_t i = 0; i < main_alignments.size(); ++i) {
 507     layout->set_main_axis_alignment(main_alignments[i]);
 508
 509     // Set the first view to shrink as much as necessary.
 510     layout->SetFlexForView(v1, 1);
 511     layout->ClearFlexForView(v2);
 512     layout->ClearFlexForView(v3);
 513     host_->Layout();
 514     EXPECT_EQ(gfx::Rect(10, 10, 5, 30).ToString(), v1->bounds().ToString());
 515     EXPECT_EQ(gfx::Rect(25, 10, 10, 30).ToString(), v2->bounds().ToString());
 516     EXPECT_EQ(gfx::Rect(45, 10, 30, 30).ToString(), v3->bounds().ToString());
 517
 518     // Set the third view to shrink 2/3s of the free space and leave the first
 519     // view with 1/3.
 520     layout->SetFlexForView(v3, 2);
 521     host_->Layout();
 522     EXPECT_EQ(gfx::Rect(10, 10, 15, 30).ToString(), v1->bounds().ToString());
 523     EXPECT_EQ(gfx::Rect(35, 10, 10, 30).ToString(), v2->bounds().ToString());
 524     EXPECT_EQ(gfx::Rect(55, 10, 20, 30).ToString(), v3->bounds().ToString());
 525
 526     // Clear the previously set flex values and set the second view to take all
 527     // the free space with MAIN_AXIS_ALIGNMENT_END set. This causes the second
 528     // view to shrink to zero and the third view still doesn't fit so it
 529     // overflows.
 530     layout->ClearFlexForView(v1);
 531     layout->SetFlexForView(v2, 2);
 532     layout->ClearFlexForView(v3);
 533     host_->Layout();
 534     EXPECT_EQ(gfx::Rect(10, 10, 20, 30).ToString(), v1->bounds().ToString());
 535     // Conceptually this view is at 10, 40, 0, 0.
 536     EXPECT_EQ(gfx::Rect(0, 0, 0, 0).ToString(), v2->bounds().ToString());
 537     EXPECT_EQ(gfx::Rect(50, 10, 25, 30).ToString(), v3->bounds().ToString());
 538   }
 539 }
 540
 541 TEST_F(BoxLayoutTest, FlexShrinkVerticalWithRemainder) {
 542   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
 543   host_->SetLayoutManager(layout);
 544   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 545   host_->AddChildView(v1);
 546   View* v2 = new StaticSizedView(gfx::Size(20, 20));
 547   host_->AddChildView(v2);
 548   View* v3 = new StaticSizedView(gfx::Size(20, 10));
 549   host_->AddChildView(v3);
 550   host_->SetBounds(0, 0, 20, 20);
 551
 552   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 553   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 554   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 555   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 556
 557   for (size_t i = 0; i < main_alignments.size(); ++i) {
 558     layout->set_main_axis_alignment(main_alignments[i]);
 559
 560     // The first view shrinks by 1/3 of the excess, the second view shrinks by
 561     // 2/3 of the excess and the third view should maintain its preferred size.
 562     layout->SetFlexForView(v1, 1);
 563     layout->SetFlexForView(v2, 2);
 564     layout->ClearFlexForView(v3);
 565     host_->Layout();
 566     EXPECT_EQ(gfx::Rect(0, 0, 20, 3).ToString(), v1->bounds().ToString());
 567     EXPECT_EQ(gfx::Rect(0, 3, 20, 7).ToString(), v2->bounds().ToString());
 568     EXPECT_EQ(gfx::Rect(0, 10, 20, 10).ToString(), v3->bounds().ToString());
 569
 570     // The second view shrinks to 2/3 of the excess, the third view shrinks to
 571     // 1/3 of the excess and the first view should maintain its preferred size.
 572     layout->ClearFlexForView(v1);
 573     layout->SetFlexForView(v2, 2);
 574     layout->SetFlexForView(v3, 1);
 575     host_->Layout();
 576     EXPECT_EQ(gfx::Rect(0, 0, 20, 10).ToString(), v1->bounds().ToString());
 577     EXPECT_EQ(gfx::Rect(0, 10, 20, 7).ToString(), v2->bounds().ToString());
 578     EXPECT_EQ(gfx::Rect(0, 17, 20, 3).ToString(), v3->bounds().ToString());
 579
 580     // Each view shrinks equally to fit within the available space.
 581     layout->SetFlexForView(v1, 1);
 582     layout->SetFlexForView(v2, 1);
 583     layout->SetFlexForView(v3, 1);
 584     host_->Layout();
 585     EXPECT_EQ(gfx::Rect(0, 0, 20, 3).ToString(), v1->bounds().ToString());
 586     EXPECT_EQ(gfx::Rect(0, 3, 20, 14).ToString(), v2->bounds().ToString());
 587     EXPECT_EQ(gfx::Rect(0, 17, 20, 3).ToString(), v3->bounds().ToString());
 588   }
 589 }
 590
 591 TEST_F(BoxLayoutTest, MinimumCrossAxisVertical) {
 592   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
 593   host_->SetLayoutManager(layout);
 594   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 595   host_->AddChildView(v1);
 596   layout->set_minimum_cross_axis_size(30);
 597
 598   EXPECT_EQ(gfx::Size(30, 10), layout->GetPreferredSize(host_.get()));
 599 }
 600
 601 TEST_F(BoxLayoutTest, MinimumCrossAxisHorizontal) {
 602   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 603   host_->SetLayoutManager(layout);
 604   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 605   host_->AddChildView(v1);
 606   layout->set_minimum_cross_axis_size(30);
 607
 608   EXPECT_EQ(gfx::Size(20, 30), layout->GetPreferredSize(host_.get()));
 609 }
 610
 611 }  // namespace views