Add ConstString test FromMidOfBufferStringRef

Summary: It was not immediately clear to me whether or not non-null-terminated StringRef's are supported in ConstString and/or the counterpart mechanism. From this test it seems to be fine. Maybe useful to keep?

Reviewers: labath

Subscribers: lldb-commits

Differential Revision: https://reviews.llvm.org/D50334

llvm-svn: 339292

1 files changed, 20 insertions, 0 deletions

diff --git a/lldb/unittests/Utility/ConstStringTest.cpp b/lldb/unittests/Utility/ConstStringTest.cpp
index add76a012e1..5ad6ea986bd 100644
--- a/lldb/unittests/Utility/ConstStringTest.cpp
+++ b/lldb/unittests/Utility/ConstStringTest.cpp
@@ -34,6 +34,26 @@ TEST(ConstStringTest, MangledCounterpart) {
   EXPECT_EQ("bar", counterpart.GetStringRef());
 }
 
+TEST(ConstStringTest, FromMidOfBufferStringRef) {
+  // StringRef's into bigger buffer: no null termination
+  const char *buffer = "foobarbaz";
+  llvm::StringRef foo_ref(buffer, 3);
+  llvm::StringRef bar_ref(buffer + 3, 3);
+
+  ConstString foo(foo_ref);
+
+  ConstString bar;
+  bar.SetStringWithMangledCounterpart(bar_ref, foo);
+  EXPECT_EQ("bar", bar.GetStringRef());
+
+  ConstString counterpart;
+  EXPECT_TRUE(bar.GetMangledCounterpart(counterpart));
+  EXPECT_EQ("foo", counterpart.GetStringRef());
+
+  EXPECT_TRUE(foo.GetMangledCounterpart(counterpart));
+  EXPECT_EQ("bar", counterpart.GetStringRef());
+}
+
 TEST(ConstStringTest, NullAndEmptyStates) {
   ConstString foo("foo");
   EXPECT_FALSE(!foo);