A test is taking shape...

1 files changed, 23 insertions, 0 deletions

diff --git a/xdelta3/testing/modify.h b/xdelta3/testing/modify.h
new file mode 100644
index 0000000..8d6b480
--- /dev/null
+++ b/xdelta3/testing/modify.h
@@ -0,0 +1,23 @@
+/* -*- Mode: C++ -*-  */
+namespace regtest {
+
+class Modify1stByte {
+ public:
+  static void Mutate(SegmentMap *table, MTRandom *rand) {
+    CHECK(!table->empty());
+
+    SegmentMap::iterator i1 = table->begin();
+    CHECK_EQ(0, i1->first);
+    
+    if (i1->second.length == 1) {
+      i1->second.seed = rand->Rand32();
+    } else {
+      i1->second.seed_offset += 1;
+      i1->second.length -= 1;
+      table->insert(make_pair(1, i1->second));
+      i1->second = Segment(rand->Rand32(), 1);
+    }
+  }
+};
+
+}  // namespace regtest