Add more tests to SignedExchangeUtilsTest

Add more tests to SignedExchangeUtilsTest regarding whitespace in quoted strings
and a string containing b2 but not equal to b2.

Bug: 803774

Change-Id: Idb4948283b9df3d85db60f6229e44be5054e0145
Reviewed-on: https://chromium-review.googlesource.com/c/1328961Reviewed-by: Kunihiko Sakamoto <ksakamoto@chromium.org>
Commit-Queue: Rob Buis <rbuis@igalia.com>
Cr-Commit-Position: refs/heads/master@{#607164}

content/browser/web_package/signed_exchange_utils_unittest.cc

@@ -69,6 +69,24 @@ TEST(SignedExchangeUtilsTest, VersionParam_Quoted) {
   EXPECT_EQ(version, SignedExchangeVersion::kB2);
 }
 
+TEST(SignedExchangeUtilsTest, VersionParam_QuotedNonB2) {
+  base::Optional<SignedExchangeVersion> version =
+      GetSignedExchangeVersion("application/signed-exchange;v=\"b22\"");
+  EXPECT_EQ(version, SignedExchangeVersion::kUnknown);
+}
+
+TEST(SignedExchangeUtilsTest, VersionParam_QuotedLeadingWhitespace) {
+  base::Optional<SignedExchangeVersion> version =
+      GetSignedExchangeVersion("application/signed-exchange;v=\" b2\"");
+  EXPECT_EQ(version, SignedExchangeVersion::kUnknown);
+}
+
+TEST(SignedExchangeUtilsTest, VersionParam_QuotedTrailingWhitespace) {
+  base::Optional<SignedExchangeVersion> version =
+      GetSignedExchangeVersion("application/signed-exchange;v=\"b2 \"");
+  EXPECT_EQ(version, SignedExchangeVersion::kUnknown);
+}
+
 TEST(SignedExchangeUtilsTest, VersionParam_QuotesOpen) {
   base::Optional<SignedExchangeVersion> version =
       GetSignedExchangeVersion("application/signed-exchange;v=\"b2");