[Favicon] Add new fallback icon rendering flow.

chrome/common/favicon/fallback_icon_url_parser_unittest.cc

+// Copyright 2015 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/fallback_icon_url_parser.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "components/favicon_base/fallback_icon_style_builder.h"
+#include "components/favicon_base/favicon_types.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/layout.h"
+
+using favicon_base::FallbackIconStyle;
+using favicon_base::FallbackIconStyleBuilder;
+
+typedef favicon_base::FallbackIconStyleBuilder Builder;
+
+class FallbackIconUrlParserTest : public testing::Test {
+ public:
+  FallbackIconUrlParserTest() {
+    // 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));
+  }
+
+  ~FallbackIconUrlParserTest() override {}
+
+ private:
+  typedef scoped_ptr<ui::test::ScopedSetSupportedScaleFactors>
+      ScopedSetSupportedScaleFactors;
+  ScopedSetSupportedScaleFactors scoped_set_supported_scale_factors_;
+
+  DISALLOW_COPY_AND_ASSIGN(FallbackIconUrlParserTest);
+};
+
+// Test parsing path with no extra parameters.
+TEST_F(FallbackIconUrlParserTest, ParsingNoExtraParams) {
+  const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
+  chrome::ParsedFallbackIconPath parsed;
+
+  const std::string path1 = url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path1, &parsed));
+  EXPECT_EQ(url, parsed.url);
+  EXPECT_EQ(16, parsed.size_in_dip);
+  EXPECT_EQ(1.0f, parsed.device_scale_factor);
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::BACKGROUND_COLOR));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::TEXT_COLOR));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::FONT_SIZE_RATIO));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::ROUNDNESS));
+}
+
+// Test parsing path with a 'size' parameter.
+TEST_F(FallbackIconUrlParserTest, ParsingSizeParam) {
+  const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
+  chrome::ParsedFallbackIconPath parsed;
+
+  // Test that we can still parse the legacy 'size' parameter format.
+  const std::string path2 = "size/32/" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path2, &parsed));
+  EXPECT_EQ(url, parsed.url);
+  EXPECT_EQ(32, parsed.size_in_dip);
+  EXPECT_EQ(1.0f, parsed.device_scale_factor);
+
+  // Test parsing current 'size' parameter format.
+  const std::string path3 = "size/32@1.4x/" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path3, &parsed));
+  EXPECT_EQ(url, parsed.url);
+  EXPECT_EQ(32, parsed.size_in_dip);
+  EXPECT_EQ(1.4f, parsed.device_scale_factor);
+
+  // Test that we pick the ui::ScaleFactor which is closest to the passed in
+  // scale factor.
+  const std::string path4 = "size/16@1.41x/" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path4, &parsed));
+  EXPECT_EQ(url, parsed.url);
+  EXPECT_EQ(16, parsed.size_in_dip);
+  EXPECT_EQ(1.41f, parsed.device_scale_factor);
+
+  // Invalid cases.
+  const std::string path5 = "size/" + url;
+  EXPECT_FALSE(chrome::ParseFallbackIconPath(path5, &parsed));
+  const std::string path6 = "size/@1x/" + url;
+  EXPECT_FALSE(chrome::ParseFallbackIconPath(path6, &parsed));
+  const std::string path7 = "size/abc@1x/" + url;
+  EXPECT_FALSE(chrome::ParseFallbackIconPath(path7, &parsed));
+
+  // Part of url looks like 'size' parameter.
+  const std::string path8 = "http://www.google.com/size/32@1.4x";
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path8, &parsed));
+  EXPECT_EQ(path8, parsed.url);
+  EXPECT_EQ(16, parsed.size_in_dip);
+  EXPECT_EQ(1.0f, parsed.device_scale_factor);
+}
+
+// Test parsing path with a 'style' parameter.
+TEST_F(FallbackIconUrlParserTest, ParsingStyleParam) {
+  const std::string url("https://www.google.ca/imghp?hl=en&tab=wi");
+  chrome::ParsedFallbackIconPath parsed;
+  FallbackIconStyle style;
+
+  // Empty is valid.
+  const std::string path9 = "style//" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path9, &parsed));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::BACKGROUND_COLOR));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::TEXT_COLOR));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::FONT_SIZE_RATIO));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::ROUNDNESS));
+
+  // Everything populated.
+  const std::string path10 = "style/abc,123456,0.5,0.1/" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path10, &parsed));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::BACKGROUND_COLOR));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::TEXT_COLOR));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::FONT_SIZE_RATIO));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::ROUNDNESS));
+  style = parsed.style_builder.Build();
+  EXPECT_EQ(SkColorSetRGB(0xAA, 0xBB, 0xCC), style.background_color);
+  EXPECT_EQ(SkColorSetRGB(0x12, 0x34, 0x56), style.text_color);
+  EXPECT_EQ(0.5, style.font_size_ratio);
+  EXPECT_EQ(0.1, style.roundness);
+
+  // Partially populated.
+  const std::string path11 = "style/123abc,,0.6/" + url;
+  EXPECT_TRUE(chrome::ParseFallbackIconPath(path11, &parsed));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::BACKGROUND_COLOR));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::TEXT_COLOR));
+  EXPECT_TRUE(parsed.style_builder.Has(Builder::FONT_SIZE_RATIO));
+  EXPECT_FALSE(parsed.style_builder.Has(Builder::ROUNDNESS));
+  style = parsed.style_builder.Build();
+  EXPECT_EQ(SkColorSetRGB(0x12, 0x3A, 0xBC), style.background_color);
+  EXPECT_EQ(0.6, style.font_size_ratio);
+
+  // Error: font_size_ratio too large.
+  const std::string path12 = "style/fff,000,100/" + url;
+  EXPECT_FALSE(chrome::ParseFallbackIconPath(path12, &parsed));
+}