1 files changed, 36 insertions, 0 deletions
diff --git a/test/sanitizer_common/TestCases/wcrtomb.c b/test/sanitizer_common/TestCases/wcrtomb.c
new file mode 100644
index 000000000..64cbd99b9
--- /dev/null
+++ b/test/sanitizer_common/TestCases/wcrtomb.c
@@ -0,0 +1,36 @@
+// RUN: %clang %s -o %t && %run %t 2>&1
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+int main(int argc, char **argv) {
+  mbstate_t state;
+  memset(&state, 0, sizeof(state));
+
+  char buff[10];
+  size_t res = wcrtomb(buff, L'a', &state);
+  assert(res == 1);
+  assert(buff[0] == 'a');
+
+  res = wcrtomb(buff, L'\0', &state);
+  assert(res == 1);
+  assert(buff[0] == '\0');
+
+  res = wcrtomb(NULL, L'\0', &state);
+  assert(res == 1);
+
+  res = wcrtomb(buff, L'a', NULL);
+  assert(res == 1);
+  assert(buff[0] == 'a');
+
+  res = wcrtomb(buff, L'\0', NULL);
+  assert(res == 1);
+  assert(buff[0] == '\0');
+
+  res = wcrtomb(NULL, L'\0', NULL);
+  assert(res == 1);
+
+  return 0;
+}