add test for struct description

Author: kastiglione

lldb/test/API/lang/objc/struct-description/Makefile

@@ -0,0 +1,2 @@
+OBJC_SOURCES := main.m
+include Makefile.rules

lldb/test/API/lang/objc/struct-description/TestObjCStructDescription.py

@@ -0,0 +1,18 @@
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TestCase(TestBase):
+    def test(self):
+        self.build()
+        lldbutil.run_to_source_breakpoint(self, "break here", lldb.SBFileSpec("main.m"))
+        self.expect(
+            "vo pair",
+            substrs=["error:", "not a pointer type", "(Pair) pair = (f = 2, e = 3)"],
+        )
+        self.expect(
+            "expr -O -- pair",
+            substrs=["error:", "not a pointer type", "(Pair)  (f = 2, e = 3)"],
+        )

lldb/test/API/lang/objc/struct-description/main.m

@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+typedef struct Pair {
+  int f;
+  int e;
+} Pair;
+
+int main() {
+  Pair pair = {2, 3};
+  printf("break here\n");
+  return 0;
+}