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 // Verifies that a BoxLayout correctly handles child spacing, flex layout, and
 203 // empty preferred size, simultaneously.
 204 TEST_F(BoxLayoutTest, EmptyPreferredSizeWithFlexLayoutAndChildSpacing) {
 205   host_->RemoveAllChildViews(true);
 206   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 5);
 207   host_->SetLayoutManager(layout);
 208   View* v1 = new StaticSizedView(gfx::Size());
 209   host_->AddChildView(v1);
 210   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 211   host_->AddChildView(v2);
 212   View* v3 = new StaticSizedView(gfx::Size(1, 1));
 213   host_->AddChildViewAt(v3, 0);
 214   layout->SetFlexForView(v3, 1);
 215   host_->SetSize(gfx::Size(1000, 15));
 216   host_->Layout();
 217
 218   EXPECT_EQ(host_->bounds().right(), v2->bounds().right());
 219 }
 220
 221 TEST_F(BoxLayoutTest, MainAxisAlignmentHorizontal) {
 222   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 223   host_->SetLayoutManager(layout);
 224
 225   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 226   host_->AddChildView(v1);
 227   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 228   host_->AddChildView(v2);
 229
 230   host_->SetBounds(0, 0, 100, 40);
 231
 232   // Align children to the horizontal start by default.
 233   host_->Layout();
 234   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 235   EXPECT_EQ(gfx::Rect(40, 10, 10, 20).ToString(), v2->bounds().ToString());
 236
 237   // Ensure same results for MAIN_AXIS_ALIGNMENT_START.
 238   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 239   host_->Layout();
 240   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 241   EXPECT_EQ(gfx::Rect(40, 10, 10, 20).ToString(), v2->bounds().ToString());
 242
 243   // Aligns children to the center horizontally.
 244   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 245   host_->Layout();
 246   EXPECT_EQ(gfx::Rect(30, 10, 20, 20).ToString(), v1->bounds().ToString());
 247   EXPECT_EQ(gfx::Rect(60, 10, 10, 20).ToString(), v2->bounds().ToString());
 248
 249   // Aligns children to the end of the host horizontally, accounting for the
 250   // inside border spacing.
 251   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 252   host_->Layout();
 253   EXPECT_EQ(gfx::Rect(50, 10, 20, 20).ToString(), v1->bounds().ToString());
 254   EXPECT_EQ(gfx::Rect(80, 10, 10, 20).ToString(), v2->bounds().ToString());
 255 }
 256
 257 TEST_F(BoxLayoutTest, MainAxisAlignmentVertical) {
 258   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 259   host_->SetLayoutManager(layout);
 260
 261   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 262   host_->AddChildView(v1);
 263   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 264   host_->AddChildView(v2);
 265
 266   host_->SetBounds(0, 0, 40, 100);
 267
 268   // Align children to the vertical start by default.
 269   host_->Layout();
 270   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 271   EXPECT_EQ(gfx::Rect(10, 40, 20, 10).ToString(), v2->bounds().ToString());
 272
 273   // Ensure same results for MAIN_AXIS_ALIGNMENT_START.
 274   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 275   host_->Layout();
 276   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 277   EXPECT_EQ(gfx::Rect(10, 40, 20, 10).ToString(), v2->bounds().ToString());
 278
 279   // Aligns children to the center vertically.
 280   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 281   host_->Layout();
 282   EXPECT_EQ(gfx::Rect(10, 30, 20, 20).ToString(), v1->bounds().ToString());
 283   EXPECT_EQ(gfx::Rect(10, 60, 20, 10).ToString(), v2->bounds().ToString());
 284
 285   // Aligns children to the end of the host vertically, accounting for the
 286   // inside border spacing.
 287   layout->set_main_axis_alignment(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 288   host_->Layout();
 289   EXPECT_EQ(gfx::Rect(10, 50, 20, 20).ToString(), v1->bounds().ToString());
 290   EXPECT_EQ(gfx::Rect(10, 80, 20, 10).ToString(), v2->bounds().ToString());
 291 }
 292
 293 TEST_F(BoxLayoutTest, CrossAxisAlignmentHorizontal) {
 294   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 295   host_->SetLayoutManager(layout);
 296
 297   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 298   host_->AddChildView(v1);
 299   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 300   host_->AddChildView(v2);
 301
 302   host_->SetBounds(0, 0, 100, 60);
 303
 304   // Stretch children to fill the available height by default.
 305   host_->Layout();
 306   EXPECT_EQ(gfx::Rect(10, 10, 20, 40).ToString(), v1->bounds().ToString());
 307   EXPECT_EQ(gfx::Rect(40, 10, 10, 40).ToString(), v2->bounds().ToString());
 308
 309   // Ensure same results for CROSS_AXIS_ALIGNMENT_STRETCH.
 310   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
 311   host_->Layout();
 312   EXPECT_EQ(gfx::Rect(10, 10, 20, 40).ToString(), v1->bounds().ToString());
 313   EXPECT_EQ(gfx::Rect(40, 10, 10, 40).ToString(), v2->bounds().ToString());
 314
 315   // Aligns children to the start vertically.
 316   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_START);
 317   host_->Layout();
 318   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 319   EXPECT_EQ(gfx::Rect(40, 10, 10, 10).ToString(), v2->bounds().ToString());
 320
 321   // Aligns children to the center vertically.
 322   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 323   host_->Layout();
 324   EXPECT_EQ(gfx::Rect(10, 20, 20, 20).ToString(), v1->bounds().ToString());
 325   EXPECT_EQ(gfx::Rect(40, 25, 10, 10).ToString(), v2->bounds().ToString());
 326
 327   // Aligns children to the end of the host vertically, accounting for the
 328   // inside border spacing.
 329   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_END);
 330   host_->Layout();
 331   EXPECT_EQ(gfx::Rect(10, 30, 20, 20).ToString(), v1->bounds().ToString());
 332   EXPECT_EQ(gfx::Rect(40, 40, 10, 10).ToString(), v2->bounds().ToString());
 333 }
 334
 335 TEST_F(BoxLayoutTest, CrossAxisAlignmentVertical) {
 336   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 337   host_->SetLayoutManager(layout);
 338
 339   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 340   host_->AddChildView(v1);
 341   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 342   host_->AddChildView(v2);
 343
 344   host_->SetBounds(0, 0, 60, 100);
 345
 346   // Stretch children to fill the available width by default.
 347   host_->Layout();
 348   EXPECT_EQ(gfx::Rect(10, 10, 40, 20).ToString(), v1->bounds().ToString());
 349   EXPECT_EQ(gfx::Rect(10, 40, 40, 10).ToString(), v2->bounds().ToString());
 350
 351   // Ensure same results for CROSS_AXIS_ALIGNMENT_STRETCH.
 352   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_STRETCH);
 353   host_->Layout();
 354   EXPECT_EQ(gfx::Rect(10, 10, 40, 20).ToString(), v1->bounds().ToString());
 355   EXPECT_EQ(gfx::Rect(10, 40, 40, 10).ToString(), v2->bounds().ToString());
 356
 357   // Aligns children to the start horizontally.
 358   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_START);
 359   host_->Layout();
 360   EXPECT_EQ(gfx::Rect(10, 10, 20, 20).ToString(), v1->bounds().ToString());
 361   EXPECT_EQ(gfx::Rect(10, 40, 10, 10).ToString(), v2->bounds().ToString());
 362
 363   // Aligns children to the center horizontally.
 364   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 365   host_->Layout();
 366   EXPECT_EQ(gfx::Rect(20, 10, 20, 20).ToString(), v1->bounds().ToString());
 367   EXPECT_EQ(gfx::Rect(25, 40, 10, 10).ToString(), v2->bounds().ToString());
 368
 369   // Aligns children to the end of the host horizontally, accounting for the
 370   // inside border spacing.
 371   layout->set_cross_axis_alignment(BoxLayout::CROSS_AXIS_ALIGNMENT_END);
 372   host_->Layout();
 373   EXPECT_EQ(gfx::Rect(30, 10, 20, 20).ToString(), v1->bounds().ToString());
 374   EXPECT_EQ(gfx::Rect(40, 40, 10, 10).ToString(), v2->bounds().ToString());
 375 }
 376
 377 TEST_F(BoxLayoutTest, FlexAll) {
 378   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 379   host_->SetLayoutManager(layout);
 380   layout->SetDefaultFlex(1);
 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   EXPECT_EQ(gfx::Size(100, 50), layout->GetPreferredSize(host_.get()));
 389
 390   host_->SetBounds(0, 0, 120, 50);
 391   host_->Layout();
 392   EXPECT_EQ(gfx::Rect(10, 10, 27, 30).ToString(), v1->bounds().ToString());
 393   EXPECT_EQ(gfx::Rect(47, 10, 16, 30).ToString(), v2->bounds().ToString());
 394   EXPECT_EQ(gfx::Rect(73, 10, 37, 30).ToString(), v3->bounds().ToString());
 395 }
 396
 397 TEST_F(BoxLayoutTest, FlexGrowVertical) {
 398   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 10, 10, 10);
 399   host_->SetLayoutManager(layout);
 400
 401   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 402   host_->AddChildView(v1);
 403   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 404   host_->AddChildView(v2);
 405   View* v3 = new StaticSizedView(gfx::Size(30, 30));
 406   host_->AddChildView(v3);
 407
 408   host_->SetBounds(0, 0, 50, 130);
 409
 410   // Views don't fill the available space by default.
 411   host_->Layout();
 412   EXPECT_EQ(gfx::Rect(10, 10, 30, 20).ToString(), v1->bounds().ToString());
 413   EXPECT_EQ(gfx::Rect(10, 40, 30, 10).ToString(), v2->bounds().ToString());
 414   EXPECT_EQ(gfx::Rect(10, 60, 30, 30).ToString(), v3->bounds().ToString());
 415
 416   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 417   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 418   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 419   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 420
 421   for (size_t i = 0; i < main_alignments.size(); ++i) {
 422     layout->set_main_axis_alignment(main_alignments[i]);
 423
 424     // Set the first view to consume all free space.
 425     layout->SetFlexForView(v1, 1);
 426     layout->ClearFlexForView(v2);
 427     layout->ClearFlexForView(v3);
 428     host_->Layout();
 429     EXPECT_EQ(gfx::Rect(10, 10, 30, 50).ToString(), v1->bounds().ToString());
 430     EXPECT_EQ(gfx::Rect(10, 70, 30, 10).ToString(), v2->bounds().ToString());
 431     EXPECT_EQ(gfx::Rect(10, 90, 30, 30).ToString(), v3->bounds().ToString());
 432
 433     // Set the third view to take 2/3s of the free space and leave the first
 434     // view
 435     // with 1/3.
 436     layout->SetFlexForView(v3, 2);
 437     host_->Layout();
 438     EXPECT_EQ(gfx::Rect(10, 10, 30, 30).ToString(), v1->bounds().ToString());
 439     EXPECT_EQ(gfx::Rect(10, 50, 30, 10).ToString(), v2->bounds().ToString());
 440     EXPECT_EQ(gfx::Rect(10, 70, 30, 50).ToString(), v3->bounds().ToString());
 441
 442     // Clear the previously set flex values and set the second view to take all
 443     // the free space.
 444     layout->ClearFlexForView(v1);
 445     layout->SetFlexForView(v2, 1);
 446     layout->ClearFlexForView(v3);
 447     host_->Layout();
 448     EXPECT_EQ(gfx::Rect(10, 10, 30, 20).ToString(), v1->bounds().ToString());
 449     EXPECT_EQ(gfx::Rect(10, 40, 30, 40).ToString(), v2->bounds().ToString());
 450     EXPECT_EQ(gfx::Rect(10, 90, 30, 30).ToString(), v3->bounds().ToString());
 451   }
 452 }
 453
 454 TEST_F(BoxLayoutTest, FlexGrowHorizontalWithRemainder) {
 455   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 456   host_->SetLayoutManager(layout);
 457   layout->SetDefaultFlex(1);
 458   std::vector<View*> views;
 459   for (int i = 0; i < 5; ++i) {
 460     View* view = new StaticSizedView(gfx::Size(10, 10));
 461     views.push_back(view);
 462     host_->AddChildView(view);
 463   }
 464
 465   EXPECT_EQ(gfx::Size(50, 10), layout->GetPreferredSize(host_.get()));
 466
 467   host_->SetBounds(0, 0, 52, 10);
 468   host_->Layout();
 469   // The 2nd and 4th views should have an extra pixel as they correspond to 20.8
 470   // and 41.6 which round up.
 471   EXPECT_EQ(gfx::Rect(0, 0, 10, 10).ToString(), views[0]->bounds().ToString());
 472   EXPECT_EQ(gfx::Rect(10, 0, 11, 10).ToString(), views[1]->bounds().ToString());
 473   EXPECT_EQ(gfx::Rect(21, 0, 10, 10).ToString(), views[2]->bounds().ToString());
 474   EXPECT_EQ(gfx::Rect(31, 0, 11, 10).ToString(), views[3]->bounds().ToString());
 475   EXPECT_EQ(gfx::Rect(42, 0, 10, 10).ToString(), views[4]->bounds().ToString());
 476 }
 477
 478 TEST_F(BoxLayoutTest, FlexGrowHorizontalWithRemainder2) {
 479   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 480   host_->SetLayoutManager(layout);
 481   layout->SetDefaultFlex(1);
 482   std::vector<View*> views;
 483   for (int i = 0; i < 4; ++i) {
 484     View* view = new StaticSizedView(gfx::Size(1, 10));
 485     views.push_back(view);
 486     host_->AddChildView(view);
 487   }
 488
 489   EXPECT_EQ(gfx::Size(4, 10), layout->GetPreferredSize(host_.get()));
 490
 491   host_->SetBounds(0, 0, 10, 10);
 492   host_->Layout();
 493   // The 1st and 3rd views should have an extra pixel as they correspond to 2.5
 494   // and 7.5 which round up.
 495   EXPECT_EQ(gfx::Rect(0, 0, 3, 10).ToString(), views[0]->bounds().ToString());
 496   EXPECT_EQ(gfx::Rect(3, 0, 2, 10).ToString(), views[1]->bounds().ToString());
 497   EXPECT_EQ(gfx::Rect(5, 0, 3, 10).ToString(), views[2]->bounds().ToString());
 498   EXPECT_EQ(gfx::Rect(8, 0, 2, 10).ToString(), views[3]->bounds().ToString());
 499 }
 500
 501 TEST_F(BoxLayoutTest, FlexShrinkHorizontal) {
 502   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 10, 10, 10);
 503   host_->SetLayoutManager(layout);
 504
 505   View* v1 = new StaticSizedView(gfx::Size(20, 20));
 506   host_->AddChildView(v1);
 507   View* v2 = new StaticSizedView(gfx::Size(10, 10));
 508   host_->AddChildView(v2);
 509   View* v3 = new StaticSizedView(gfx::Size(30, 30));
 510   host_->AddChildView(v3);
 511
 512   host_->SetBounds(0, 0, 85, 50);
 513
 514   // Truncate width by default.
 515   host_->Layout();
 516   EXPECT_EQ(gfx::Rect(10, 10, 20, 30).ToString(), v1->bounds().ToString());
 517   EXPECT_EQ(gfx::Rect(40, 10, 10, 30).ToString(), v2->bounds().ToString());
 518   EXPECT_EQ(gfx::Rect(60, 10, 15, 30).ToString(), v3->bounds().ToString());
 519
 520   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 521   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 522   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 523   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 524
 525   for (size_t i = 0; i < main_alignments.size(); ++i) {
 526     layout->set_main_axis_alignment(main_alignments[i]);
 527
 528     // Set the first view to shrink as much as necessary.
 529     layout->SetFlexForView(v1, 1);
 530     layout->ClearFlexForView(v2);
 531     layout->ClearFlexForView(v3);
 532     host_->Layout();
 533     EXPECT_EQ(gfx::Rect(10, 10, 5, 30).ToString(), v1->bounds().ToString());
 534     EXPECT_EQ(gfx::Rect(25, 10, 10, 30).ToString(), v2->bounds().ToString());
 535     EXPECT_EQ(gfx::Rect(45, 10, 30, 30).ToString(), v3->bounds().ToString());
 536
 537     // Set the third view to shrink 2/3s of the free space and leave the first
 538     // view with 1/3.
 539     layout->SetFlexForView(v3, 2);
 540     host_->Layout();
 541     EXPECT_EQ(gfx::Rect(10, 10, 15, 30).ToString(), v1->bounds().ToString());
 542     EXPECT_EQ(gfx::Rect(35, 10, 10, 30).ToString(), v2->bounds().ToString());
 543     EXPECT_EQ(gfx::Rect(55, 10, 20, 30).ToString(), v3->bounds().ToString());
 544
 545     // Clear the previously set flex values and set the second view to take all
 546     // the free space with MAIN_AXIS_ALIGNMENT_END set. This causes the second
 547     // view to shrink to zero and the third view still doesn't fit so it
 548     // overflows.
 549     layout->ClearFlexForView(v1);
 550     layout->SetFlexForView(v2, 2);
 551     layout->ClearFlexForView(v3);
 552     host_->Layout();
 553     EXPECT_EQ(gfx::Rect(10, 10, 20, 30).ToString(), v1->bounds().ToString());
 554     // Conceptually this view is at 10, 40, 0, 0.
 555     EXPECT_EQ(gfx::Rect(0, 0, 0, 0).ToString(), v2->bounds().ToString());
 556     EXPECT_EQ(gfx::Rect(50, 10, 25, 30).ToString(), v3->bounds().ToString());
 557   }
 558 }
 559
 560 TEST_F(BoxLayoutTest, FlexShrinkVerticalWithRemainder) {
 561   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
 562   host_->SetLayoutManager(layout);
 563   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 564   host_->AddChildView(v1);
 565   View* v2 = new StaticSizedView(gfx::Size(20, 20));
 566   host_->AddChildView(v2);
 567   View* v3 = new StaticSizedView(gfx::Size(20, 10));
 568   host_->AddChildView(v3);
 569   host_->SetBounds(0, 0, 20, 20);
 570
 571   std::vector<BoxLayout::MainAxisAlignment> main_alignments;
 572   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_START);
 573   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
 574   main_alignments.push_back(BoxLayout::MAIN_AXIS_ALIGNMENT_END);
 575
 576   for (size_t i = 0; i < main_alignments.size(); ++i) {
 577     layout->set_main_axis_alignment(main_alignments[i]);
 578
 579     // The first view shrinks by 1/3 of the excess, the second view shrinks by
 580     // 2/3 of the excess and the third view should maintain its preferred size.
 581     layout->SetFlexForView(v1, 1);
 582     layout->SetFlexForView(v2, 2);
 583     layout->ClearFlexForView(v3);
 584     host_->Layout();
 585     EXPECT_EQ(gfx::Rect(0, 0, 20, 3).ToString(), v1->bounds().ToString());
 586     EXPECT_EQ(gfx::Rect(0, 3, 20, 7).ToString(), v2->bounds().ToString());
 587     EXPECT_EQ(gfx::Rect(0, 10, 20, 10).ToString(), v3->bounds().ToString());
 588
 589     // The second view shrinks to 2/3 of the excess, the third view shrinks to
 590     // 1/3 of the excess and the first view should maintain its preferred size.
 591     layout->ClearFlexForView(v1);
 592     layout->SetFlexForView(v2, 2);
 593     layout->SetFlexForView(v3, 1);
 594     host_->Layout();
 595     EXPECT_EQ(gfx::Rect(0, 0, 20, 10).ToString(), v1->bounds().ToString());
 596     EXPECT_EQ(gfx::Rect(0, 10, 20, 7).ToString(), v2->bounds().ToString());
 597     EXPECT_EQ(gfx::Rect(0, 17, 20, 3).ToString(), v3->bounds().ToString());
 598
 599     // Each view shrinks equally to fit within the available space.
 600     layout->SetFlexForView(v1, 1);
 601     layout->SetFlexForView(v2, 1);
 602     layout->SetFlexForView(v3, 1);
 603     host_->Layout();
 604     EXPECT_EQ(gfx::Rect(0, 0, 20, 3).ToString(), v1->bounds().ToString());
 605     EXPECT_EQ(gfx::Rect(0, 3, 20, 14).ToString(), v2->bounds().ToString());
 606     EXPECT_EQ(gfx::Rect(0, 17, 20, 3).ToString(), v3->bounds().ToString());
 607   }
 608 }
 609
 610 TEST_F(BoxLayoutTest, MinimumCrossAxisVertical) {
 611   BoxLayout* layout = new BoxLayout(BoxLayout::kVertical, 0, 0, 0);
 612   host_->SetLayoutManager(layout);
 613   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 614   host_->AddChildView(v1);
 615   layout->set_minimum_cross_axis_size(30);
 616
 617   EXPECT_EQ(gfx::Size(30, 10), layout->GetPreferredSize(host_.get()));
 618 }
 619
 620 TEST_F(BoxLayoutTest, MinimumCrossAxisHorizontal) {
 621   BoxLayout* layout = new BoxLayout(BoxLayout::kHorizontal, 0, 0, 0);
 622   host_->SetLayoutManager(layout);
 623   View* v1 = new StaticSizedView(gfx::Size(20, 10));
 624   host_->AddChildView(v1);
 625   layout->set_minimum_cross_axis_size(30);
 626
 627   EXPECT_EQ(gfx::Size(20, 30), layout->GetPreferredSize(host_.get()));
 628 }
 629
 630 }  // namespace views