chrome/browser/ui/views/tabs/stacked_tab_strip_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 "chrome/browser/ui/views/tabs/stacked_tab_strip_layout.h"
   6
   7 #include <string>
   8
   9 #include "base/strings/string_number_conversions.h"
  10 #include "base/strings/string_util.h"
  11 #include "testing/gtest/include/gtest/gtest.h"
  12 #include "ui/views/view.h"
  13 #include "ui/views/view_model.h"
  14
  15 namespace {
  16
  17 struct CommonTestData {
  18   const int initial_x;
  19   const int width;
  20   const int tab_size;
  21   const int tab_padding;
  22   const int stacked_offset;
  23   const int mini_tab_count;
  24   const int active_index;
  25   const std::string start_bounds;
  26   const std::string expected_bounds;
  27 };
  28
  29 }  // namespace
  30
  31 class StackedTabStripLayoutTest : public testing::Test {
  32  public:
  33   StackedTabStripLayoutTest() {}
  34
  35  protected:
  36   void Reset(StackedTabStripLayout* layout,
  37              int x,
  38              int width,
  39              int mini_tab_count,
  40              int active_index) {
  41     layout->Reset(x, width, mini_tab_count, active_index);
  42   }
  43
  44   void CreateLayout(const CommonTestData& data) {
  45     if (!data.start_bounds.empty())
  46       PrepareChildViewsFromString(data.start_bounds);
  47     else
  48       PrepareChildViewsFromString(data.expected_bounds);
  49     layout_.reset(new StackedTabStripLayout(
  50                      gfx::Size(data.tab_size, 10), data.tab_padding,
  51                      data.stacked_offset, 4, &view_model_));
  52     if (data.start_bounds.empty()) {
  53       PrepareChildViewsFromString(data.expected_bounds);
  54       layout_->Reset(data.initial_x, data.width, data.mini_tab_count,
  55                      data.active_index);
  56     } else {
  57       ASSERT_NO_FATAL_FAILURE(SetBoundsFromString(data.start_bounds));
  58       layout_->Reset(data.initial_x, data.width, data.mini_tab_count,
  59                      data.active_index);
  60       ASSERT_NO_FATAL_FAILURE(SetBoundsFromString(data.start_bounds));
  61     }
  62   }
  63
  64   void AddViewToViewModel(int index) {
  65     views::View* child_view = new views::View;
  66     view_.AddChildView(child_view);
  67     view_model_.Add(child_view, index);
  68   }
  69
  70   void PrepareChildViewsFromString(const std::string& bounds) {
  71     std::vector<std::string> positions;
  72     Tokenize(bounds, " ", &positions);
  73     PrepareChildViews(static_cast<int>(positions.size()));
  74   }
  75
  76   void PrepareChildViews(int count) {
  77     view_model_.Clear();
  78     view_.RemoveAllChildViews(true);
  79     for (int i = 0; i < count; ++i)
  80       AddViewToViewModel(i);
  81   }
  82
  83   void SetBoundsFromString(const std::string& bounds) {
  84     std::vector<std::string> positions;
  85     Tokenize(bounds, " ", &positions);
  86     PrepareChildViews(static_cast<int>(positions.size()));
  87     for (int i = 0; i < view_model_.view_size(); ++i) {
  88       int x = 0;
  89       gfx::Rect bounds(view_model_.ideal_bounds(i));
  90       ASSERT_TRUE(base::StringToInt(positions[i], &x));
  91       bounds.set_x(x);
  92       view_model_.set_ideal_bounds(i, bounds);
  93     }
  94   }
  95
  96   std::string BoundsString() const {
  97     std::string result;
  98     for (int i = 0; i < view_model_.view_size(); ++i) {
  99       if (!result.empty())
 100         result += " ";
 101       result += base::IntToString(view_model_.ideal_bounds(i).x());
 102     }
 103     return result;
 104   }
 105
 106   std::string BoundsString2(int active_index) const {
 107     std::string result;
 108     for (int i = 0; i < view_model_.view_size(); ++i) {
 109       if (!result.empty())
 110         result += " ";
 111       if (i == active_index)
 112         result += "[";
 113       result += base::IntToString(view_model_.ideal_bounds(i).x());
 114       if (i == active_index)
 115         result += "]";
 116     }
 117     return result;
 118   }
 119
 120   void Validate(int active_index, int max_width) {
 121     // Make sure none of the tabs are more than 90 apart
 122     // (tab_size(100) + padding (-10)).
 123     for (int j = 1; j < view_model_.view_size(); ++j)
 124       EXPECT_LE(ideal_x(j) - ideal_x(j - 1), max_width - 100);
 125   }
 126
 127   int ideal_x(int index) const {
 128     return view_model_.ideal_bounds(index).x();
 129   }
 130
 131   scoped_ptr<StackedTabStripLayout> layout_;
 132   views::ViewModel view_model_;
 133
 134  private:
 135   views::View view_;
 136
 137   DISALLOW_COPY_AND_ASSIGN(StackedTabStripLayoutTest);
 138 };
 139
 140 // Random data.
 141 TEST_F(StackedTabStripLayoutTest, ValidateInitialLayout) {
 142   StackedTabStripLayout layout(gfx::Size(100, 10), -10, 2, 4, &view_model_);
 143   PrepareChildViews(12);
 144
 145   for (int i = 120; i < 600; ++i) {
 146     for (int j = 0; j < 12; ++j) {
 147       Reset(&layout, 0, i, 0, j);
 148       Validate(j, i);
 149       if (HasNonfatalFailure())
 150         return;
 151     }
 152   }
 153 }
 154
 155 // Ensure initial layout is correct.
 156 TEST_F(StackedTabStripLayoutTest, InitialLayout) {
 157   struct CommonTestData test_data[] = {
 158     { 0, 198, 100, -10, 1, 0, 9, "",
 159       "0 0 0 0 0 0 1 2 3 4 94 95 96 97 98 98 98 98" },
 160     { 0, 198, 100, -10, 1, 0, 0, "", "0 90 94 95 96 97 98 98 98" },
 161     { 0, 300, 100, -10, 1, 0, 0, "",
 162       "0 90 180 196 197 198 199 200 200 200 200" },
 163     { 0, 300, 100, -10, 1, 0, 10, "", "0 0 0 0 1 2 3 4 20 110 200" },
 164     { 0, 300, 100, -10, 1, 0, 1, "", "0 90 180 196 197 198 199 200 200" },
 165     { 0, 643, 160, -27, 6, 0, 0, "", "0 133 266 399" },
 166     { 0, 300, 100, -10, 1, 0, 7, "", "0 1 2 3 4 20 110 200" },
 167     { 0, 300, 100, -10, 1, 0, 6, "", "0 1 2 3 4 20 110 200" },
 168     { 0, 300, 100, -10, 1, 0, 4, "", "0 1 2 3 4 94 184 199 200" },
 169   };
 170   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 171     CreateLayout(test_data[i]);
 172     EXPECT_EQ(test_data[i].expected_bounds, BoundsString()) << " at " << i;
 173   }
 174 }
 175
 176 // Assertions for dragging from an existing configuration.
 177 TEST_F(StackedTabStripLayoutTest, DragActiveTabExisting) {
 178   struct TestData {
 179     struct CommonTestData common_data;
 180     const int delta;
 181   } test_data[] = {
 182     //
 183     // The following set of tests create 6 tabs, the first two are pinned and
 184     // the 2nd tab is selected.
 185     //
 186     // 1 pixel to the right, should push only mini-tabs and first non-mini-tab.
 187     { { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 188         "1 6 11 101 138 140" }, 1 },
 189     // Push enough to collapse the 4th tab.
 190     { { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 191         "36 41 46 136 138 140" }, 36 },
 192     // 1 past collapsing the 4th.
 193     { { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 194         "37 42 47 136 138 140" }, 37 },
 195     // Collapse the third.
 196     { { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 197         "124 129 134 136 138 140" }, 124 },
 198     // One past collapsing the third.
 199     { { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 200         "124 129 134 136 138 140" }, 125 },
 201
 202     //
 203     // The following set of tests create 6 tabs, the first two are pinned and
 204     // the 5th is selected.
 205     //
 206     // 1 pixel to the right, should expose part of a tab.
 207     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140", "0 5 10 90 131 140" },
 208       1 },
 209     // Push the tab as far to the right as it'll go.
 210     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140", "0 5 10 90 138 140" },
 211       8 },
 212     // One past as far to the right as it'll go. Should expose more of the tab
 213     // before it.
 214     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140", "0 5 10 91 138 140" },
 215       9 },
 216     // Enough so that the pinned tabs start pulling in.
 217     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140", "1 6 11 101 138 140" },
 218       19 },
 219     // One more than last.
 220     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140", "2 7 12 102 138 140" },
 221       20 },
 222     // Enough to collapse the fourth as small it can get.
 223     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140",
 224         "36 41 46 136 138 140" }, 54 },
 225     // Enough to collapse the third as small it can get.
 226     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140",
 227         "124 129 134 136 138 140" }, 142 },
 228     // One more than last, shouldn't change anything.
 229     { { 10, 240, 100, -10, 2, 2, 4, "0 5 10 90 130 140",
 230         "124 129 134 136 138 140" }, 143 },
 231
 232     //
 233     // The following set of tests create 3 tabs with the second selected.
 234     //
 235     // Drags in 2, pulling the rightmost tab along.
 236     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "2 92 140" }, 2 },
 237     // Drags the rightmost tab as far to right as possible.
 238     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "48 138 140" }, 48 },
 239     // Drags so much that the left most tabs pulls in.
 240     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "135 138 140" }, 135 },
 241     // Drags so far that no more tabs pull in.
 242     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "136 138 140" }, 200 },
 243     // Drags to the left most position before the right tabs start pulling in.
 244     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "0 50 140" }, -40 },
 245     // Drags 1 beyond the left most position, which should pull in the right
 246     // tab slightly.
 247     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "0 49 139" }, -41 },
 248     // Drags to the left as far as the tab goes.
 249     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "0 2 92" }, -88 },
 250     // Drags one past as far to the left as the tab goes. Should keep pulling
 251     // in the rightmost tab.
 252     { { 0, 240, 100, -10, 2, 0, 1, "0 90 140", "0 2 91" }, -89 },
 253   };
 254
 255   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 256     CreateLayout(test_data[i].common_data);
 257     layout_->DragActiveTab(test_data[i].delta);
 258     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 259         " at " << i;
 260   }
 261 }
 262
 263 // Assertions for SizeToFit().
 264 TEST_F(StackedTabStripLayoutTest, SizeToFit) {
 265   struct CommonTestData test_data[] = {
 266     // Dragged to the right.
 267     { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140", "1 6 11 101 138 140"},
 268     { 10, 240, 100, -10, 2, 2, 1, "0 5 10 100 138 140",
 269       "124 129 134 136 138 140" },
 270
 271     // Dragged to the left.
 272     { 0, 240, 100, -10, 2, 0, 1, "0 50 140", "0 49 139" },
 273
 274     // Dragged to the left.
 275     { 0, 240, 100, -10, 2, 0, 1, "0 49 89 140", "0 49 89 139" },
 276   };
 277
 278   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 279     CreateLayout(test_data[i]);
 280     SetBoundsFromString(test_data[i].expected_bounds);
 281     layout_->SizeToFit();
 282     // NOTE: because of the way the code is structured this asserts on
 283     // |start_bound|, not |expected_bounds|.
 284     EXPECT_EQ(test_data[i].start_bounds, BoundsString()) << " at " << i;
 285   }
 286 }
 287
 288 // Assertions for AddTab().
 289 TEST_F(StackedTabStripLayoutTest, AddTab) {
 290   struct TestData {
 291     CommonTestData common_data;
 292     int add_index;
 293     bool add_active;
 294     bool add_mini;
 295   } test_data[] = {
 296     // Adding a background tab test cases.
 297     { { 0, 300, 100, -10, 2, 0, 1, "0 90 180 198 200", "0 16 106 196 198 200"},
 298       3, false, false },
 299     { { 0, 300, 100, -10, 2, 0, 1, "0 90 180 198 200", "0 2 4 20 110 200"},
 300       5, false, false },
 301     { { 0, 300, 100, -10, 2, 0, 1, "0 90 180 198 200", "0 90 180 196 198 200"},
 302       2, false, false },
 303     { { 0, 300, 100, -10, 2, 0, 1, "0 90 180 198 200", "0 2 4 94 184 200"},
 304       0, false, false },
 305
 306     { { 4, 200, 100, -10, 2, 1, 2, "0 4 10 100", "0 0 8 10 100"},
 307       1, false, true },
 308     { { 4, 200, 100, -10, 2, 1, 2, "0 4 10 100", "0 0 8 98 100"},
 309       1, true, true },
 310     { { 4, 200, 100, -10, 2, 1, 2, "0 4 10 100", "0 0 8 98 100"},
 311       0, true, true },
 312     { { 0, 200, 100, -10, 2, 0, 2, "0 2 10 100", "0 4 94 98 100"},
 313       0, true, true },
 314
 315     { { 0, 200, 100, -10, 2, 0, 0, "0 90 92 92 94 96 98 100",
 316                                    "0 0 0 2 4 6 8 98 100"},
 317       7, true, false },
 318     { { 0, 200, 100, -10, 2, 0, 7, "0 2 4 6 8 8 10 100",
 319                                    "0 0 2 4 6 8 96 98 100"},
 320       5, true, false },
 321     { { 0, 200, 100, -10, 2, 0, 7, "0 2 4 6 8 8 10 100",
 322                                    "0 2 4 6 8 94 96 98 100"},
 323       4, true, false },
 324     { { 0, 200, 100, -10, 2, 0, 2, "0 2 10 100", "0 2 10 98 100"},
 325       2, true, false },
 326     { { 0, 200, 100, -10, 2, 0, 2, "0 2 10 100", "0 2 4 10 100"},
 327       4, true, false },
 328     { { 0, 200, 100, -10, 2, 0, 2, "0 2 10 100", "0 90 96 98 100"},
 329       0, true, false },
 330   };
 331   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 332     CreateLayout(test_data[i].common_data);
 333     int add_types = 0;
 334     if (test_data[i].add_active)
 335       add_types |= StackedTabStripLayout::kAddTypeActive;
 336     if (test_data[i].add_mini)
 337       add_types |= StackedTabStripLayout::kAddTypeMini;
 338     AddViewToViewModel(test_data[i].add_index);
 339     layout_->AddTab(test_data[i].add_index, add_types,
 340                     test_data[i].common_data.initial_x +
 341                     (test_data[i].add_mini ? 4 : 0));
 342     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 343         " at " << i;
 344   }
 345 }
 346
 347 // Assertions around removing tabs.
 348 TEST_F(StackedTabStripLayoutTest, RemoveTab) {
 349   // TODO: add coverage of removing mini tabs!
 350   struct TestData {
 351     struct CommonTestData common_data;
 352     const int remove_index;
 353     const int x_after_remove;
 354   } test_data[] = {
 355     { { 0, 882, 220, -29, 2, 0, 4, "0 23 214 405 596 602",
 356         "0 191 382 573 662" }, 1, 0 },
 357
 358     // Remove before active.
 359     { { 0, 200, 100, -10, 2, 0, 4, "0 2 4 6 8 10 80 98 100",
 360         "0 2 6 8 10 80 98 100" },
 361       2, 0 },
 362
 363     // Stacked tabs on both sides.
 364     { { 0, 200, 100, -10, 2, 0, 4, "0 2 4 6 8 10 80 98 100",
 365         "0 2 4 6 10 80 98 100" },
 366       4, 0 },
 367
 368     // Mini-tabs.
 369     { { 8, 200, 100, -10, 2, 1, 0, "0 8 94 96 98 100", "0 86 88 90 100" },
 370       0, 0 },
 371     { { 16, 200, 100, -10, 2, 2, 0, "0 8 16 94 96 98 100", "8 8 86 88 90 100" },
 372       0, 8 },
 373     { { 16, 200, 100, -10, 2, 2, 0, "0 8 16 94 96 98 100", "0 8 86 88 90 100" },
 374       1, 8 },
 375
 376     // Remove from ideal layout.
 377     { { 0, 200, 100, -10, 2, 0, 0, "0 90 94 96 98 100", "0 90 96 98 100" },
 378       0, 0 },
 379     { { 0, 200, 100, -10, 2, 0, 0, "0 90 94 96 98 100", "0 90 96 98 100" },
 380       1, 0 },
 381     { { 0, 200, 100, -10, 2, 0, 0, "0 90 94 96 98 100", "0 90 96 98 100" },
 382       2, 0 },
 383     { { 0, 200, 100, -10, 2, 0, 0, "0 90 94 96 98 100", "0 90 94 98 100" },
 384       3, 0 },
 385     { { 0, 200, 100, -10, 2, 0, 0, "0 90 94 96 98 100", "0 90 94 96 100" },
 386       5, 0 },
 387   };
 388   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 389     CreateLayout(test_data[i].common_data);
 390     int old_x = view_model_.ideal_bounds(test_data[i].remove_index).x();
 391     view_model_.Remove(test_data[i].remove_index);
 392     layout_->RemoveTab(test_data[i].remove_index, test_data[i].x_after_remove,
 393                        old_x);
 394     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 395         " at " << i;
 396   }
 397 }
 398
 399 // Assertions for SetWidth().
 400 TEST_F(StackedTabStripLayoutTest, SetWidth) {
 401   struct TestData {
 402     CommonTestData common_data;
 403     int new_width;
 404   } test_data[] = {
 405     { { 0, 500, 100, -10, 2, 0, 4, "0 90 180 270 360 400",
 406                                    "0 90 180 196 198 200"}, 300 },
 407
 408     // Verifies a bug in AdjustTrailingStackedTabs().
 409     { { 0, 103, 100, -10, 2, 0, 0, "", "0 2"}, 102 },
 410
 411     { { 8, 250, 100, -10, 2, 2, 2, "0 4 8 98 148 150", "0 4 8 98 160 250"},
 412       350 },
 413     { { 8, 250, 100, -10, 2, 2, 2, "0 4 8 98 148 150", "0 4 8 96 98 100"},
 414       200 },
 415
 416     { { 0, 250, 100, -10, 2, 0, 2, "0 40 90 120 150", "0 40 90 98 100"}, 200 },
 417     { { 0, 250, 100, -10, 2, 0, 2, "0 2 60 150", "0 2 60 100"}, 200 },
 418     { { 0, 250, 100, -10, 2, 0, 2, "0 40 120 150", "0 40 98 100"}, 200 },
 419
 420     { { 0, 200, 100, -10, 2, 0, 2, "0 2 10 100", "0 2 60 150"}, 250 },
 421     { { 0, 200, 100, -10, 2, 0, 2, "0 2 4 10 100", "0 2 20 110 200"}, 300 },
 422   };
 423   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 424     CreateLayout(test_data[i].common_data);
 425     layout_->SetWidth(test_data[i].new_width);
 426     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 427         " at " << i;
 428   }
 429 }
 430
 431 // Assertions for SetActiveIndex().
 432 TEST_F(StackedTabStripLayoutTest, SetActiveIndex) {
 433   struct TestData {
 434     CommonTestData common_data;
 435     int new_index;
 436   } test_data[] = {
 437     { { 0, 250, 100, -10, 2, 0, 2, "0 4 8 98 148 150", "0 90 144 146 148 150"},
 438       0 },
 439     { { 0, 250, 100, -10, 2, 0, 2, "0 4 8 98 148 150", "0 2 4 58 148 150"}, 4 },
 440     { { 0, 250, 100, -10, 2, 0, 2, "0 4 8 98 148 150", "0 2 4 6 60 150"}, 5 },
 441     { { 4, 250, 100, -10, 2, 1, 2, "0 4 8 98 148 150", "0 4 94 146 148 150"},
 442       0 },
 443   };
 444   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 445     CreateLayout(test_data[i].common_data);
 446     layout_->SetActiveIndex(test_data[i].new_index);
 447     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 448         " at " << i;
 449   }
 450 }
 451
 452 // Makes sure don't crash when resized and only one tab.
 453 TEST_F(StackedTabStripLayoutTest, EmptyTest) {
 454   StackedTabStripLayout layout(gfx::Size(160, 10), -27, 6, 4, &view_model_);
 455   PrepareChildViews(1);
 456   layout.AddTab(0, StackedTabStripLayout::kAddTypeActive, 0);
 457   layout.SetWidth(100);
 458   layout.SetWidth(50);
 459   layout.SetWidth(0);
 460   layout.SetWidth(500);
 461 }
 462
 463 // Assertions around removing tabs.
 464 TEST_F(StackedTabStripLayoutTest, MoveTab) {
 465   // TODO: add coverage of removing mini tabs!
 466   struct TestData {
 467     struct CommonTestData common_data;
 468     const int from;
 469     const int to;
 470     const int new_active_index;
 471     const int new_start_x;
 472     const int new_mini_tab_count;
 473   } test_data[] = {
 474     // Moves and unpins.
 475     { { 10, 300, 100, -10, 2, 2, 0, "", "0 5 10 100 190 198 200" },
 476       0, 1, 2, 5, 1 },
 477
 478     // Moves and pins.
 479     { { 0, 300, 100, -10, 2, 0, 4, "", "0 5 95 185 196 198 200" },
 480       2, 0, 0, 5, 1 },
 481     { { 0, 300, 100, -10, 2, 1, 2, "", "0 5 10 100 190 198 200" },
 482       2, 0, 0, 10, 2 },
 483
 484     { { 0, 200, 100, -10, 2, 0, 4, "0 2 4 6 96 98 100", "0 2 4 6 96 98 100" },
 485       2, 0, 4, 0, 0 },
 486     { { 0, 200, 100, -10, 2, 0, 4, "0 2 4 6 96 98 100", "0 2 4 6 8 10 100" },
 487       0, 6, 6, 0, 0 },
 488   };
 489   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 490     CreateLayout(test_data[i].common_data);
 491     view_model_.MoveViewOnly(test_data[i].from, test_data[i].to);
 492     for (int j = 0; j < test_data[i].new_mini_tab_count; ++j) {
 493       gfx::Rect bounds;
 494       bounds.set_x(j * 5);
 495       view_model_.set_ideal_bounds(j, bounds);
 496     }
 497     layout_->MoveTab(test_data[i].from, test_data[i].to,
 498                      test_data[i].new_active_index, test_data[i].new_start_x,
 499                      test_data[i].new_mini_tab_count);
 500     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 501         " at " << i;
 502   }
 503 }
 504
 505 // Assertions around IsStacked().
 506 TEST_F(StackedTabStripLayoutTest, IsStacked) {
 507   // A single tab with enough space should never be stacked.
 508   PrepareChildViews(1);
 509   layout_.reset(new StackedTabStripLayout(
 510                     gfx::Size(100, 10), -10, 2, 4, &view_model_));
 511   Reset(layout_.get(), 0, 400, 0, 0);
 512   EXPECT_FALSE(layout_->IsStacked(0));
 513
 514   // First tab active, remaining tabs stacked.
 515   PrepareChildViews(8);
 516   Reset(layout_.get(), 0, 400, 0, 0);
 517   EXPECT_FALSE(layout_->IsStacked(0));
 518   EXPECT_TRUE(layout_->IsStacked(7));
 519
 520   // Last tab active, preceeding tabs stacked.
 521   layout_->SetActiveIndex(7);
 522   EXPECT_FALSE(layout_->IsStacked(7));
 523   EXPECT_TRUE(layout_->IsStacked(0));
 524 }
 525
 526 // Assertions around SetXAndMiniCount.
 527 TEST_F(StackedTabStripLayoutTest, SetXAndMiniCount) {
 528   // Verifies we don't crash when transitioning to all mini-tabs.
 529   PrepareChildViews(1);
 530   layout_.reset(new StackedTabStripLayout(
 531                     gfx::Size(100, 10), -10, 2, 4, &view_model_));
 532   Reset(layout_.get(), 0, 400, 0, 0);
 533   layout_->SetXAndMiniCount(0, 1);
 534 }
 535
 536 // Assertions around SetXAndMiniCount.
 537 TEST_F(StackedTabStripLayoutTest, SetActiveTabLocation) {
 538   struct TestData {
 539     struct CommonTestData common_data;
 540     const int location;
 541   } test_data[] = {
 542     // Active tab is the first tab, can't be moved.
 543     { { 0, 300, 100, -10, 2, 0, 0, "", "0 90 180 194 196 198 200" }, 50 },
 544
 545     // Active tab is pinned; should result in nothing.
 546     { { 0, 300, 100, -10, 2, 2, 1, "", "0 0 0 90 180 198 200" }, 199 },
 547
 548     // Location is too far to the right, ends up being pushed in.
 549     { { 0, 300, 100, -10, 2, 0, 3, "", "0 14 104 194 196 198 200" }, 199 },
 550
 551     // Location can be honored.
 552     { { 0, 300, 100, -10, 2, 0, 3, "", "0 2 4 40 130 198 200" }, 40 },
 553   };
 554   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(test_data); ++i) {
 555     CreateLayout(test_data[i].common_data);
 556     layout_->SetActiveTabLocation(test_data[i].location);
 557     EXPECT_EQ(test_data[i].common_data.expected_bounds, BoundsString()) <<
 558         " at " << i;
 559   }
 560 }