Catch bad display sizes.

ui/display/fake_display_snapshot_unittests.cc

 // Copyright 2016 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 "ui/display/fake_display_snapshot.h"
 
 #include <memory>
 
 #include "base/macros.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 88 matching lines @@
 TEST(FakeDisplaySnapshotTest, BadDisplayMode) {
   // Need width and height.
   EXPECT_EQ(nullptr, CreateSnapshot("1024"));
   // Display height and width should be separated by 'x' not ','.
   EXPECT_EQ(nullptr, CreateSnapshot("1024,768"));
   // Random 'a' before spec starts.
   EXPECT_EQ(nullptr, CreateSnapshot("a1024,768"));
   // Need to provide a refresh rate after '%'.
   EXPECT_EQ(nullptr, CreateSnapshot("1024,768%"));
   EXPECT_EQ(nullptr, CreateSnapshot("1024,768%a"));
+  // Display resolution can't be zero for width or height.
+  EXPECT_EQ(nullptr, CreateSnapshot("000x800"));
+  EXPECT_EQ(nullptr, CreateSnapshot("800x000"));
   // Refresh rate should come before DPI.
   EXPECT_EQ(nullptr, CreateSnapshot("1000x1000^300%120"));
 }
 
 TEST(FakeDisplaySnapshotTest, BadDPI) {
   // DPI should be an integer value.
   EXPECT_EQ(nullptr, CreateSnapshot("1024x768^a"));
   EXPECT_EQ(nullptr, CreateSnapshot("1024x768^300d"));
 }
 
@@ skipping 13 matching lines @@
   EXPECT_EQ(nullptr, display);
 }
 
 TEST(FakeDisplaySnapshotTest, BadOrderModeSeparator) {
   // Reverse the '#' and ':' delimiters for alternate display modes.
   auto display = CreateSnapshot("1920x1080:1600x900#1280x720");
   EXPECT_EQ(nullptr, display);
 }
 
 }  // namespace display