[llvm] r244637 - Add SmallString test trying to exercise the realloc() code path

[Yaron Keren via llvm-commits]

Author: yrnkrn
Date: Tue Aug 11 12:35:49 2015
New Revision: 244637

URL: http://llvm.org/viewvc/llvm-project?rev=244637&view=rev
Log:
Add SmallString test trying to exercise the realloc() code path
by allocating a small size (will go through malloc) and then large size.


Modified:
    llvm/trunk/unittests/ADT/SmallStringTest.cpp

Modified: llvm/trunk/unittests/ADT/SmallStringTest.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/ADT/SmallStringTest.cpp?rev=244637&r1=244636&r2=244637&view=diff
==============================================================================
--- llvm/trunk/unittests/ADT/SmallStringTest.cpp (original)
+++ llvm/trunk/unittests/ADT/SmallStringTest.cpp Tue Aug 11 12:35:49 2015
@@ -159,6 +159,17 @@ TEST_F(SmallStringTest, Count) {
   EXPECT_EQ(0U, theString.count("zz"));
 }
 
+TEST_F(SmallStringTest, Realloc) {
+  theString = "abcd";
+  theString.reserve(100);
+  EXPECT_EQ("abcd", theString);
+  unsigned const N = 100000;
+  theString.reserve(N);
+  for (unsigned i = 0; i < N - 4; ++i)
+    theString.push_back('y');
+  EXPECT_EQ("abcdyyy", theString.slice(0, 7));
+}
+
 TEST(StringRefTest, Comparisons) {
   EXPECT_EQ(-1, SmallString<10>("aab").compare("aad"));
   EXPECT_EQ( 0, SmallString<10>("aab").compare("aab"));