ui: Add IsExpressibleAsRect() method to RectF

ui/gfx/rect_unittest.cc

Index: ui/gfx/rect_unittest.cc
diff --git a/ui/gfx/rect_unittest.cc b/ui/gfx/rect_unittest.cc
index 1f31ae261376c4ba419b4f19632315e189ac8291..fbb3c9b8779f5438fd067c8a6c1a1c58ce0bdd2d 100644
--- a/ui/gfx/rect_unittest.cc
+++ b/ui/gfx/rect_unittest.cc
@@ -671,4 +671,35 @@ TEST(RectTest, BoundingRect) {
   }
 }
 
+TEST(RectTest, IsExpressibleAsRect) {
+  //EXPECT_TRUE(gfx::RectF().IsExpressibleAsRect());
+
+  float min = std::numeric_limits<int>::min();
+  float max = std::numeric_limits<int>::max();
+  float infinity = std::numeric_limits<float>::infinity();
+
+  EXPECT_TRUE(gfx::RectF(min, min, max, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(min + 200, min, max, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(min, min + 200, max, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(min - 200, min, max, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(min, min - 200, max, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(min, min, max - 200, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(min, min, max, max - 200).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(min, min, max + 200, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(min, min, max, max + 200).IsExpressibleAsRect());
+
+  EXPECT_TRUE(gfx::RectF(0, 0, max, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(200, 0, max, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, 200, max, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(0, 0, max - 200, max).IsExpressibleAsRect());
+  EXPECT_TRUE(gfx::RectF(0, 0, max, max - 200).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, 0, max + 200, max).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, 0, max, max + 200).IsExpressibleAsRect());
+
+  EXPECT_FALSE(gfx::RectF(infinity, 0, 1, 1).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, infinity, 1, 1).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, 0, infinity, 1).IsExpressibleAsRect());
+  EXPECT_FALSE(gfx::RectF(0, 0, 1, infinity).IsExpressibleAsRect());
+}
+
 }  // namespace ui