LibclangTest: remove libclang-test-* tmp dir reliably

Temporary directories created by two LibclangReparseTest tests -
ReparseWithModule and clang_parseTranslationUnit2FullArgv - remained in
the system temporary directory after running libclangTests, because not
all files and subdirectories created in TestDir were added to set
LibclangParseTest::Files.

Differential Revision: https://reviews.llvm.org/D143415

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/unittests/libclang/LibclangTest.cpp b/clang/unittests/libclang/LibclangTest.cpp
index 809426a..11a729f 100644
--- a/clang/unittests/libclang/LibclangTest.cpp
+++ b/clang/unittests/libclang/LibclangTest.cpp
@@ -515,6 +515,8 @@ TEST_F(LibclangReparseTest, ReparseWithModule) {
   WriteFile(HeaderName, std::string(HeaderTop) + HeaderBottom);
   WriteFile(ModName, ModFile);
 
+  // Removing recursively is necessary to delete the module cache.
+  RemoveTestDirRecursivelyDuringTeardown = true;
   std::string ModulesCache = std::string("-fmodules-cache-path=") + TestDir;
   const char *Args[] = { "-fmodules", ModulesCache.c_str(),
                          "-I", TestDir.c_str() };