Report errors when parsing Manifest and expose them in developer console.

content/renderer/manifest/manifest_parser_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 "content/renderer/manifest/manifest_parser.h"
 
 #include "base/strings/string_util.h"
 #include "content/public/common/manifest.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class ManifestParserTest : public testing::Test  {
  protected:
   ManifestParserTest() {}
   ~ManifestParserTest() override {}
 
-  Manifest ParseManifest(const base::StringPiece& json,
-                         const GURL& document_url = default_document_url,
-                         const GURL& manifest_url = default_manifest_url) {
-    return ManifestParser::Parse(json, document_url, manifest_url);
+  Manifest ParseManifestWithURLs(const base::StringPiece& data,
+                                 const GURL& document_url,
+                                 const GURL& manifest_url) {
+    ManifestParser parser(data, document_url, manifest_url);
+    parser.Parse();
+    errors_ = parser.errors();
+    return parser.manifest();
+  }
+
+  Manifest ParseManifest(const base::StringPiece& data) {
+    return ParseManifestWithURLs(
+        data, default_document_url, default_manifest_url);
+  }
+
+  const std::vector<std::string>& errors() const {
+    return errors_;
+  }
+
+  unsigned int GetErrorCount() const {
+    return errors_.size();
   }
 
   static const GURL default_document_url;
   static const GURL default_manifest_url;
 
  private:
+  std::vector<std::string> errors_;
+
   DISALLOW_COPY_AND_ASSIGN(ManifestParserTest);
 };
 
 const GURL ManifestParserTest::default_document_url(
     "http://foo.com/index.html");
 const GURL ManifestParserTest::default_manifest_url(
     "http://foo.com/manifest.json");
 
 TEST_F(ManifestParserTest, EmptyStringNull) {
   Manifest manifest = ParseManifest("");
 
+  // This Manifest is not a valid JSON object, it's a parsing error.
+  EXPECT_EQ(1u, GetErrorCount());
+  EXPECT_EQ("Manifest parsing error: Line: 1, column: 1, Unexpected token.",
+            errors()[0]);
+
   // A parsing error is equivalent to an empty manifest.
   ASSERT_TRUE(manifest.IsEmpty());
   ASSERT_TRUE(manifest.name.is_null());
   ASSERT_TRUE(manifest.short_name.is_null());
   ASSERT_TRUE(manifest.start_url.is_empty());
   ASSERT_EQ(manifest.display, Manifest::DISPLAY_MODE_UNSPECIFIED);
   ASSERT_EQ(manifest.orientation, blink::WebScreenOrientationLockDefault);
 }
 
 TEST_F(ManifestParserTest, ValidNoContentParses) {
   Manifest manifest = ParseManifest("{}");
 
+  // Empty Manifest is not a parsing error.
+  EXPECT_EQ(0u, GetErrorCount());
+
   // Check that all the fields are null in that case.
   ASSERT_TRUE(manifest.IsEmpty());
   ASSERT_TRUE(manifest.name.is_null());
   ASSERT_TRUE(manifest.short_name.is_null());
   ASSERT_TRUE(manifest.start_url.is_empty());
   ASSERT_EQ(manifest.display, Manifest::DISPLAY_MODE_UNSPECIFIED);
   ASSERT_EQ(manifest.orientation, blink::WebScreenOrientationLockDefault);
 }
 
+TEST_F(ManifestParserTest, MultipleErrorsReporting) {
+  Manifest manifest = ParseManifest("{ \"name\": 42, \"short_name\": 4,"
+      "\"orientation\": {}, \"display\": \"foo\", \"start_url\": null,"
+      "\"icons\": {} }");
+
+  EXPECT_EQ(6u, GetErrorCount());
+
+  EXPECT_EQ("Manifest parsing error: property 'name' ignored,"
+            " type string expected.",
+            errors()[0]);
+  EXPECT_EQ("Manifest parsing error: property 'short_name' ignored,"
+            " type string expected.",
+            errors()[1]);
+  EXPECT_EQ("Manifest parsing error: property 'start_url' ignored,"
+            " type string expected.",
+            errors()[2]);
+  EXPECT_EQ("Manifest parsing error: unknown 'display' value ignored.",
+            errors()[3]);
+  EXPECT_EQ("Manifest parsing error: property 'orientation' ignored,"
+            " type string expected.",
+            errors()[4]);
+  EXPECT_EQ("Manifest parsing error: property 'icons' ignored, "
+            "type array expected.",
+            errors()[5]);
+}
+
 TEST_F(ManifestParserTest, NameParseRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"name\": \"foo\" }");
     ASSERT_TRUE(EqualsASCII(manifest.name.string(), "foo"));
     ASSERT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"name\": \"  foo  \" }");
     ASSERT_TRUE(EqualsASCII(manifest.name.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"name\": {} }");
     ASSERT_TRUE(manifest.name.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'name' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"name\": 42 }");
     ASSERT_TRUE(manifest.name.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'name' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 }
 
 TEST_F(ManifestParserTest, ShortNameParseRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"short_name\": \"foo\" }");
     ASSERT_TRUE(EqualsASCII(manifest.short_name.string(), "foo"));
     ASSERT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"short_name\": \"  foo  \" }");
     ASSERT_TRUE(EqualsASCII(manifest.short_name.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"short_name\": {} }");
     ASSERT_TRUE(manifest.short_name.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'short_name' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"short_name\": 42 }");
     ASSERT_TRUE(manifest.short_name.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'short_name' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 }
 
 TEST_F(ManifestParserTest, StartURLParseRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"start_url\": \"land.html\" }");
     ASSERT_EQ(manifest.start_url.spec(),
               default_document_url.Resolve("land.html").spec());
     ASSERT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"start_url\": \"  land.html  \" }");
     ASSERT_EQ(manifest.start_url.spec(),
               default_document_url.Resolve("land.html").spec());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"start_url\": {} }");
     ASSERT_TRUE(manifest.start_url.is_empty());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'start_url' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"start_url\": 42 }");
     ASSERT_TRUE(manifest.start_url.is_empty());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'start_url' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Absolute start_url, same origin with document.
   {
     Manifest manifest =
-        ParseManifest("{ \"start_url\": \"http://foo.com/land.html\" }",
-                      GURL("http://foo.com/manifest.json"),
-                      GURL("http://foo.com/index.html"));
+        ParseManifestWithURLs("{ \"start_url\": \"http://foo.com/land.html\" }",
+                              GURL("http://foo.com/manifest.json"),
+                              GURL("http://foo.com/index.html"));
     ASSERT_EQ(manifest.start_url.spec(), "http://foo.com/land.html");
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Absolute start_url, cross origin with document.
   {
     Manifest manifest =
-        ParseManifest("{ \"start_url\": \"http://bar.com/land.html\" }",
-                      GURL("http://foo.com/manifest.json"),
-                      GURL("http://foo.com/index.html"));
+        ParseManifestWithURLs("{ \"start_url\": \"http://bar.com/land.html\" }",
+                              GURL("http://foo.com/manifest.json"),
+                              GURL("http://foo.com/index.html"));
     ASSERT_TRUE(manifest.start_url.is_empty());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'start_url' ignored, should "
+              "be same origin as document.",
+              errors()[0]);
   }
 
   // Resolving has to happen based on the manifest_url.
   {
     Manifest manifest =
-        ParseManifest("{ \"start_url\": \"land.html\" }",
-                      GURL("http://foo.com/landing/manifest.json"),
-                      GURL("http://foo.com/index.html"));
+        ParseManifestWithURLs("{ \"start_url\": \"land.html\" }",
+                              GURL("http://foo.com/landing/manifest.json"),
+                              GURL("http://foo.com/index.html"));
     ASSERT_EQ(manifest.start_url.spec(), "http://foo.com/landing/land.html");
+    EXPECT_EQ(0u, GetErrorCount());
   }
 }
 
 TEST_F(ManifestParserTest, DisplayParserRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"browser\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_BROWSER);
     EXPECT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"  browser  \" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_BROWSER);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"display\": {} }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_UNSPECIFIED);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'display' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"display\": 42 }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_UNSPECIFIED);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'display' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Parse fails if string isn't known.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"browser_something\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_UNSPECIFIED);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: unknown 'display' value ignored.",
+              errors()[0]);
   }
 
   // Accept 'fullscreen'.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"fullscreen\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_FULLSCREEN);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'fullscreen'.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"standalone\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_STANDALONE);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'minimal-ui'.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"minimal-ui\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_MINIMAL_UI);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'browser'.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"browser\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_BROWSER);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Case insensitive.
   {
     Manifest manifest = ParseManifest("{ \"display\": \"BROWSER\" }");
     EXPECT_EQ(manifest.display, Manifest::DISPLAY_MODE_BROWSER);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 }
 
 TEST_F(ManifestParserTest, OrientationParserRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"natural\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockNatural);
     EXPECT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"natural\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockNatural);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": {} }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockDefault);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'orientation' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if name isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": 42 }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockDefault);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'orientation' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Parse fails if string isn't known.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"naturalish\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockDefault);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: unknown 'orientation' value ignored.",
+              errors()[0]);
   }
 
   // Accept 'any'.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"any\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockAny);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'natural'.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"natural\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockNatural);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'landscape'.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"landscape\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockLandscape);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'landscape-primary'.
   {
     Manifest manifest =
         ParseManifest("{ \"orientation\": \"landscape-primary\" }");
     EXPECT_EQ(manifest.orientation,
               blink::WebScreenOrientationLockLandscapePrimary);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'landscape-secondary'.
   {
     Manifest manifest =
         ParseManifest("{ \"orientation\": \"landscape-secondary\" }");
     EXPECT_EQ(manifest.orientation,
               blink::WebScreenOrientationLockLandscapeSecondary);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'portrait'.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"portrait\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockPortrait);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'portrait-primary'.
   {
     Manifest manifest =
       ParseManifest("{ \"orientation\": \"portrait-primary\" }");
     EXPECT_EQ(manifest.orientation,
               blink::WebScreenOrientationLockPortraitPrimary);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Accept 'portrait-secondary'.
   {
     Manifest manifest =
         ParseManifest("{ \"orientation\": \"portrait-secondary\" }");
     EXPECT_EQ(manifest.orientation,
               blink::WebScreenOrientationLockPortraitSecondary);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Case insensitive.
   {
     Manifest manifest = ParseManifest("{ \"orientation\": \"LANDSCAPE\" }");
     EXPECT_EQ(manifest.orientation, blink::WebScreenOrientationLockLandscape);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 }
 
 TEST_F(ManifestParserTest, IconsParseRules) {
   // Smoke test: if no icon, empty list.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [] }");
     EXPECT_EQ(manifest.icons.size(), 0u);
     EXPECT_TRUE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Smoke test: if empty icon, empty list.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {} ] }");
     EXPECT_EQ(manifest.icons.size(), 0u);
     EXPECT_TRUE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Smoke test: icon with invalid src, empty list.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ { \"icons\": [] } ] }");
     EXPECT_EQ(manifest.icons.size(), 0u);
     EXPECT_TRUE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Smoke test: if icon with empty src, it will be present in the list.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ { \"src\": \"\" } ] }");
     EXPECT_EQ(manifest.icons.size(), 1u);
     EXPECT_EQ(manifest.icons[0].src.spec(), "http://foo.com/index.html");
     EXPECT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Smoke test: if one icons with valid src, it will be present in the list.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [{ \"src\": \"foo.jpg\" }] }");
     EXPECT_EQ(manifest.icons.size(), 1u);
     EXPECT_EQ(manifest.icons[0].src.spec(), "http://foo.com/foo.jpg");
     EXPECT_FALSE(manifest.IsEmpty());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 }
 
 TEST_F(ManifestParserTest, IconSrcParseRules) {
   // Smoke test.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"foo.png\" } ] }");
     EXPECT_EQ(manifest.icons[0].src.spec(),
               default_document_url.Resolve("foo.png").spec());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Whitespaces.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"   foo.png   \" } ] }");
     EXPECT_EQ(manifest.icons[0].src.spec(),
               default_document_url.Resolve("foo.png").spec());
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": {} } ] }");
     EXPECT_TRUE(manifest.icons.empty());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'src' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": 42 } ] }");
     EXPECT_TRUE(manifest.icons.empty());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'src' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Resolving has to happen based on the document_url.
   {
-    Manifest manifest =
-        ParseManifest("{ \"icons\": [ {\"src\": \"icons/foo.png\" } ] }",
-                      GURL("http://foo.com/landing/index.html"));
+    Manifest manifest = ParseManifestWithURLs(
+        "{ \"icons\": [ {\"src\": \"icons/foo.png\" } ] }",
+        GURL("http://foo.com/landing/index.html"),
+        default_manifest_url);
     EXPECT_EQ(manifest.icons[0].src.spec(),
               "http://foo.com/landing/icons/foo.png");
+    EXPECT_EQ(0u, GetErrorCount());
   }
 }
 
 TEST_F(ManifestParserTest, IconTypeParseRules) {
   // Smoke test.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"type\": \"foo\" } ] }");
     EXPECT_TRUE(EqualsASCII(manifest.icons[0].type.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
                                       " \"type\": \"  foo  \" } ] }");
     EXPECT_TRUE(EqualsASCII(manifest.icons[0].type.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"type\": {} } ] }");
     EXPECT_TRUE(manifest.icons[0].type.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'type' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"type\": 42 } ] }");
     EXPECT_TRUE(manifest.icons[0].type.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'type' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 }
 
 TEST_F(ManifestParserTest, IconDensityParseRules) {
   // Smoke test.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": 42 } ] }");
     EXPECT_EQ(manifest.icons[0].density, 42);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Decimal value.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": 2.5 } ] }");
     EXPECT_EQ(manifest.icons[0].density, 2.5);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Parse fail if it isn't a float.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": {} } ] }");
     EXPECT_EQ(manifest.icons[0].density, Manifest::Icon::kDefaultDensity);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: icon 'density' ignored, "
+              "must be float greater than 0.",
+              errors()[0]);
   }
 
   // Parse fail if it isn't a float.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\":\"2\" } ] }");
     EXPECT_EQ(manifest.icons[0].density, Manifest::Icon::kDefaultDensity);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: icon 'density' ignored, "
+              "must be float greater than 0.",
+              errors()[0]);
   }
 
   // Edge case: 1.0.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": 1.00 } ] }");
     EXPECT_EQ(manifest.icons[0].density, 1);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Edge case: values between 0.0 and 1.0 are allowed.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": 0.42 } ] }");
     EXPECT_EQ(manifest.icons[0].density, 0.42);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // 0 is an invalid value.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": 0.0 } ] }");
     EXPECT_EQ(manifest.icons[0].density, Manifest::Icon::kDefaultDensity);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: icon 'density' ignored, "
+              "must be float greater than 0.",
+              errors()[0]);
   }
 
   // Negative values are invalid.
   {
     Manifest manifest =
         ParseManifest("{ \"icons\": [ {\"src\": \"\", \"density\": -2.5 } ] }");
     EXPECT_EQ(manifest.icons[0].density, Manifest::Icon::kDefaultDensity);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: icon 'density' ignored, "
+              "must be float greater than 0.",
+              errors()[0]);
   }
 }
 
 TEST_F(ManifestParserTest, IconSizesParseRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"42x42\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 1u);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"  42x42  \" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 1u);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
-  // Don't parse if name isn't a string.
+  // Ignore sizes if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": {} } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 0u);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'sizes' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
-  // Don't parse if name isn't a string.
+  // Ignore sizes if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": 42 } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 0u);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'sizes' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 
   // Smoke test: value correctly parsed.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"42x42  48x48\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes[0], gfx::Size(42, 42));
     EXPECT_EQ(manifest.icons[0].sizes[1], gfx::Size(48, 48));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // <WIDTH>'x'<HEIGHT> and <WIDTH>'X'<HEIGHT> are equivalent.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"42X42  48X48\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes[0], gfx::Size(42, 42));
     EXPECT_EQ(manifest.icons[0].sizes[1], gfx::Size(48, 48));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Twice the same value is parsed twice.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"42X42  42x42\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes[0], gfx::Size(42, 42));
     EXPECT_EQ(manifest.icons[0].sizes[1], gfx::Size(42, 42));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Width or height can't start with 0.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"004X007  042x00\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 0u);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: found icon with no valid size.",
+              errors()[0]);
   }
 
   // Width and height MUST contain digits.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"e4X1.0  55ax1e10\" } ] }");
     EXPECT_EQ(manifest.icons[0].sizes.size(), 0u);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: found icon with no valid size.",
+              errors()[0]);
   }
 
   // 'any' is correctly parsed and transformed to gfx::Size(0,0).
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"any AnY ANY aNy\" } ] }");
     gfx::Size any = gfx::Size(0, 0);
     EXPECT_EQ(manifest.icons[0].sizes.size(), 4u);
     EXPECT_EQ(manifest.icons[0].sizes[0], any);
     EXPECT_EQ(manifest.icons[0].sizes[1], any);
     EXPECT_EQ(manifest.icons[0].sizes[2], any);
     EXPECT_EQ(manifest.icons[0].sizes[3], any);
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Some invalid width/height combinations.
   {
     Manifest manifest = ParseManifest("{ \"icons\": [ {\"src\": \"\","
         "\"sizes\": \"x 40xx 1x2x3 x42 42xx42\" } ] }");
     gfx::Size any = gfx::Size(0, 0);
     EXPECT_EQ(manifest.icons[0].sizes.size(), 0u);
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: found icon with no valid size.",
+              errors()[0]);
   }
 }
 
 TEST_F(ManifestParserTest, GCMSenderIDParseRules) {
   // Smoke test.
   {
     Manifest manifest = ParseManifest("{ \"gcm_sender_id\": \"foo\" }");
     EXPECT_TRUE(EqualsASCII(manifest.gcm_sender_id.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Trim whitespaces.
   {
     Manifest manifest = ParseManifest("{ \"gcm_sender_id\": \"  foo  \" }");
     EXPECT_TRUE(EqualsASCII(manifest.gcm_sender_id.string(), "foo"));
+    EXPECT_EQ(0u, GetErrorCount());
   }
 
   // Don't parse if property isn't a string.
   {
     Manifest manifest = ParseManifest("{ \"gcm_sender_id\": {} }");
     EXPECT_TRUE(manifest.gcm_sender_id.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'gcm_sender_id' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
   {
     Manifest manifest = ParseManifest("{ \"gcm_sender_id\": 42 }");
     EXPECT_TRUE(manifest.gcm_sender_id.is_null());
+    EXPECT_EQ(1u, GetErrorCount());
+    EXPECT_EQ("Manifest parsing error: property 'gcm_sender_id' ignored,"
+              " type string expected.",
+              errors()[0]);
   }
 }
 
 } // namespace content