More PrefixSet diagnostics.

chrome/browser/safe_browsing/prefix_set_unittest.cc

Index: chrome/browser/safe_browsing/prefix_set_unittest.cc
diff --git a/chrome/browser/safe_browsing/prefix_set_unittest.cc b/chrome/browser/safe_browsing/prefix_set_unittest.cc
index 7224e8543cd6f0a2809f1f524867026342368129..f0002b7fadb627b8b351616f281fb8589a2c5a8b 100644
--- a/chrome/browser/safe_browsing/prefix_set_unittest.cc
+++ b/chrome/browser/safe_browsing/prefix_set_unittest.cc
@@ -432,4 +432,25 @@ TEST_F(PrefixSetTest, CorruptionExcess) {
   ASSERT_FALSE(prefix_set.get());
 }
 
+// TODO(shess): Remove once the problem is debugged.  But, until then,
+// make sure the accessors work!
+TEST_F(PrefixSetTest, DebuggingAccessors) {
+  std::vector<SBPrefix> prefixes;
+  std::unique_copy(shared_prefixes_.begin(), shared_prefixes_.end(),
+                   std::back_inserter(prefixes));
+  safe_browsing::PrefixSet prefix_set(prefixes);
+
+  EXPECT_EQ(prefixes.size(), prefix_set.GetSize());
+  EXPECT_FALSE(prefix_set.IsDeltaAt(0));
+  for (size_t i = 1; i < prefixes.size(); ++i) {
+    const int delta = prefixes[i] - prefixes[i - 1];
+    if (delta > 0xFFFF) {
+      EXPECT_FALSE(prefix_set.IsDeltaAt(i));
+    } else {
+      ASSERT_TRUE(prefix_set.IsDeltaAt(i));
+      EXPECT_EQ(delta, prefix_set.DeltaAt(i));
+    }
+  }
+}
+
 }  // namespace