[Favicon] Add new fallback icon rendering flow.

chrome/common/favicon/favicon_url_parser_unittest.cc

 // Copyright 2013 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 "chrome/common/favicon/favicon_url_parser.h"
 
 #include "base/memory/scoped_ptr.h"
+#include "components/favicon_base/fallback_icon_specs.h"
 #include "components/favicon_base/favicon_types.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/layout.h"
 
+using favicon_base::FallbackIconSpecs;
+
 class FaviconUrlParserTest : public testing::Test {
  public:
   FaviconUrlParserTest() {
     // Set the supported scale factors because the supported scale factors
     // affect the result of ParsePathAndScale().
     std::vector<ui::ScaleFactor> supported_scale_factors;
     supported_scale_factors.push_back(ui::SCALE_FACTOR_100P);
     supported_scale_factors.push_back(ui::SCALE_FACTOR_140P);
     scoped_set_supported_scale_factors_.reset(
         new ui::test::ScopedSetSupportedScaleFactors(supported_scale_factors));
@@ skipping 14 matching lines @@
   const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
   int icon_types = favicon_base::TOUCH_PRECOMPOSED_ICON;
   chrome::ParsedFaviconPath parsed;
 
   const std::string path1 = url;
   EXPECT_TRUE(chrome::ParseFaviconPath(path1, icon_types, &parsed));
   EXPECT_FALSE(parsed.is_icon_url);
   EXPECT_EQ(url, parsed.url);
   EXPECT_EQ(16, parsed.size_in_dip);
   EXPECT_EQ(1.0f, parsed.device_scale_factor);
+  EXPECT_FALSE(parsed.fallback_specs);
 }
 
 // Test parsing path with a 'size' parameter.
 TEST_F(FaviconUrlParserTest, ParsingSizeParam) {
   const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
   int icon_types = favicon_base::TOUCH_PRECOMPOSED_ICON;
   chrome::ParsedFaviconPath parsed;
 
   // Test that we can still parse the legacy 'size' parameter format.
   const std::string path2 = "size/32/" + url;
@@ skipping 100 matching lines @@
   EXPECT_EQ(32, parsed.size_in_dip);
   EXPECT_EQ(1.4f, parsed.device_scale_factor);
 
   const std::string path14 =
       "largest/iconurl/http://www.google.com/favicon.ico";
   EXPECT_TRUE(chrome::ParseFaviconPath(path14, icon_types, &parsed));
   EXPECT_TRUE(parsed.is_icon_url);
   EXPECT_EQ("http://www.google.com/favicon.ico", parsed.url);
   EXPECT_EQ(0, parsed.size_in_dip);
 }
+
+// Test parsing path with a 'fallback' parameter.
+TEST_F(FaviconUrlParserTest, ParsingFallbackParam) {
+  const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
+  int icon_types = favicon_base::TOUCH_PRECOMPOSED_ICON;
+  chrome::ParsedFaviconPath parsed;
+
+  // Empty is valid.
+  const std::string path15 = "fallback//" + url;
+  EXPECT_TRUE(chrome::ParseFaviconPath(path15, icon_types, &parsed));
+  EXPECT_TRUE(parsed.fallback_specs);
+  EXPECT_FALSE(parsed.fallback_specs->Has(FallbackIconSpecs::BACKGROUND_COLOR));
+  EXPECT_FALSE(parsed.fallback_specs->Has(FallbackIconSpecs::TEXT_COLOR));
+  EXPECT_FALSE(parsed.fallback_specs->Has(FallbackIconSpecs::FONT_SIZE_RATIO));
+  EXPECT_FALSE(parsed.fallback_specs->Has(
+                   FallbackIconSpecs::CORNER_RADIUS_RATIO));
+
+  // Everything populated.
+  const std::string path16 = "fallback/abc,123456,0.5,0.1/" + url;
+  EXPECT_TRUE(chrome::ParseFaviconPath(path16, icon_types, &parsed));
+  EXPECT_TRUE(parsed.fallback_specs);
+  EXPECT_EQ(SkColorSetRGB(0xAA, 0xBB, 0xCC),
+            parsed.fallback_specs->BackgroundColor());
+  EXPECT_EQ(SkColorSetRGB(0x12, 0x34, 0x56),
+            parsed.fallback_specs->TextColor());
+  EXPECT_EQ(0.5, parsed.fallback_specs->FontSizeRatio());
+  EXPECT_EQ(0.1, parsed.fallback_specs->CornerRadiusRatio());
+
+  // Partially populated.
+  const std::string path17 = "fallback/123abc,,0.6/" + url;
+  EXPECT_TRUE(chrome::ParseFaviconPath(path17, icon_types, &parsed));
+  EXPECT_TRUE(parsed.fallback_specs);
+  EXPECT_EQ(SkColorSetRGB(0x12, 0x3A, 0xBC),
+            parsed.fallback_specs->BackgroundColor());
+  EXPECT_FALSE(parsed.fallback_specs->Has(FallbackIconSpecs::TEXT_COLOR));
+  EXPECT_EQ(0.6, parsed.fallback_specs->FontSizeRatio());
+  EXPECT_FALSE(parsed.fallback_specs->Has(
+                   FallbackIconSpecs::CORNER_RADIUS_RATIO));
+
+  // Error: FontSizeRatio too large.
+  const std::string path18 = "fallback/fff,000,100/" + url;
+  EXPECT_FALSE(chrome::ParseFaviconPath(path18, icon_types, &parsed));
+}