Allow moving cursors between connected displays.

ash/display/display_util_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/display/display_util.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/display_manager_test_api.h"
@@ skipping 80 matching lines @@
   }
 }
 
 TEST_F(DisplayUtilTest, GenerateDisplayIdList) {
   DisplayIdList list;
   {
     int64_t ids[] = {10, 1};
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(1, list[0]);
     EXPECT_EQ(10, list[1]);
+
+    int64_t three_ids[] = {10, 5, 1};
+    list = GenerateDisplayIdList(std::begin(three_ids), std::end(three_ids));
+    ASSERT_EQ(3u, list.size());
+    EXPECT_EQ(1, list[0]);
+    EXPECT_EQ(5, list[1]);
+    EXPECT_EQ(10, list[2]);
   }
   {
     int64_t ids[] = {10, 100};
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(10, list[0]);
     EXPECT_EQ(100, list[1]);
+
+    int64_t three_ids[] = {10, 100, 1000};
+    list = GenerateDisplayIdList(std::begin(three_ids), std::end(three_ids));
+    ASSERT_EQ(3u, list.size());
+    EXPECT_EQ(10, list[0]);
+    EXPECT_EQ(100, list[1]);
+    EXPECT_EQ(1000, list[2]);
   }
   {
     test::ScopedSetInternalDisplayId set_internal(100);
     int64_t ids[] = {10, 100};
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(100, list[0]);
     EXPECT_EQ(10, list[1]);
 
     std::swap(ids[0], ids[1]);
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(100, list[0]);
     EXPECT_EQ(10, list[1]);
+
+    int64_t three_ids[] = {10, 100, 1000};
+    list = GenerateDisplayIdList(std::begin(three_ids), std::end(three_ids));
+    ASSERT_EQ(3u, list.size());
+    EXPECT_EQ(100, list[0]);
+    EXPECT_EQ(10, list[1]);
+    EXPECT_EQ(1000, list[2]);
   }
   {
     test::ScopedSetInternalDisplayId set_internal(10);
     int64_t ids[] = {10, 100};
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(10, list[0]);
     EXPECT_EQ(100, list[1]);
 
     std::swap(ids[0], ids[1]);
     list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
     EXPECT_EQ(10, list[0]);
     EXPECT_EQ(100, list[1]);
+
+    int64_t three_ids[] = {10, 100, 1000};
+    list = GenerateDisplayIdList(std::begin(three_ids), std::end(three_ids));
+    ASSERT_EQ(3u, list.size());
+    EXPECT_EQ(10, list[0]);
+    EXPECT_EQ(100, list[1]);
+    EXPECT_EQ(1000, list[2]);
   }
 }
 
+TEST_F(DisplayUtilTest, DisplayIdListToString) {
+  {
+    int64_t ids[] = {10, 1, 16};
+    DisplayIdList list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
+    EXPECT_EQ("1,10,16", DisplayIdListToString(list));
+  }
+  {
+    test::ScopedSetInternalDisplayId set_internal(16);
+    int64_t ids[] = {10, 1, 16};
+    DisplayIdList list = GenerateDisplayIdList(std::begin(ids), std::end(ids));
+    EXPECT_EQ("16,1,10", DisplayIdListToString(list));
+  }
+}
+
 }  // namespace