[lldb][test] Add tests for formatting pointers to std::unordered_map

Ever since #143501 and #144517, these should pass.

Adds tests for https://github.com/llvm/llvm-project/issues/146040

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/TestDataFormatterLibccUnorderedMap.py

diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/TestDataFormatterLibccUnorderedMap.py b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/TestDataFormatterLibccUnorderedMap.py
index 2b1bd67..bf103aa 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/TestDataFormatterLibccUnorderedMap.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/TestDataFormatterLibccUnorderedMap.py
@@ -9,21 +9,28 @@
 
 
 class LibcxxUnorderedMapDataFormatterTestCase(TestBase):
-    def check_reference(self, var_name: str, expected_type: str):
-        self.expect_var_path(
-            var_name,
-            summary="size=1",
-            type=expected_type,
-            children=[
-                ValueCheck(
-                    name="[0]",
-                    children=[
-                        ValueCheck(name="first", summary='"Hello"'),
-                        ValueCheck(name="second", summary='"World"'),
-                    ],
-                ),
-            ],
-        )
+    def check_ptr_or_ref(self, var_name: str):
+        var = self.frame().FindVariable(var_name)
+        self.assertTrue(var)
+
+        pair = var.GetChildAtIndex(0)
+        self.assertTrue(pair)
+
+        self.assertEqual(pair.GetChildAtIndex(0).summary, '"Hello"')
+        self.assertEqual(pair.GetChildAtIndex(1).summary, '"World"')
+
+    def check_ptr_ptr(self, var_name: str):
+        var = self.frame().FindVariable(var_name)
+        self.assertTrue(var)
+
+        ptr = var.GetChildAtIndex(0)
+        self.assertTrue(ptr)
+
+        pair = ptr.GetChildAtIndex(0)
+        self.assertTrue(pair)
+
+        self.assertEqual(pair.GetChildAtIndex(0).summary, '"Hello"')
+        self.assertEqual(pair.GetChildAtIndex(1).summary, '"World"')
 
     @add_test_categories(["libc++"])
     def test_iterator_formatters(self):
@@ -84,12 +91,12 @@
         lldbutil.continue_to_breakpoint(process, bkpt)
 
         # Test references to std::unordered_map
-        self.check_reference("ref1", "const StringMapT &")
-        self.check_reference("ref2", "StringMapT &")
-        self.check_reference("ref3", "StringMapTRef")
-        self.check_reference("ref4", "const StringMapT &")
-        self.check_reference("ref5", "const StringMapT &&")
-        self.check_reference("ref6", "StringMapT &&")
+        self.check_ptr_or_ref("ref1")
+        self.check_ptr_or_ref("ref2")
+        self.check_ptr_or_ref("ref3")
+        self.check_ptr_or_ref("ref4")
+        self.check_ptr_or_ref("ref5")
+        self.check_ptr_or_ref("ref6")
 
         # FIXME: we're getting this wrong.
         self.expect_var_path(
@@ -97,3 +104,12 @@
             summary="size=0",
             type="const StringMapT *const &",
         )
+
+        lldbutil.continue_to_breakpoint(process, bkpt)
+
+        self.check_ptr_or_ref("ptr1")
+        self.check_ptr_or_ref("ptr2")
+        self.check_ptr_or_ref("ptr3")
+        self.check_ptr_ptr("ptr4")
+        self.check_ptr_ptr("ptr5")
+        self.check_ptr_ptr("ptr6")

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/main.cpp

diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/main.cpp b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/main.cpp
index c581fde..26cbb94 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/main.cpp
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/unordered_map/main.cpp
@@ -4,6 +4,7 @@
 
 using StringMapT = std::unordered_map<std::string, std::string>;
 using StringMapTRef = const StringMapT &;
+using StringMapTPtr = const StringMapT *;
 
 static void check_references(const StringMapT &ref1, StringMapT &ref2,
                              StringMapTRef ref3, StringMapTRef &ref4,
@@ -12,6 +13,12 @@
   std::printf("Break here");
 }
 
+static void check_pointer(const StringMapT *ptr1, StringMapT *ptr2,
+                          StringMapTPtr ptr3, StringMapTPtr *ptr4,
+                          const StringMapT *const *ptr5, StringMapT **ptr6) {
+  std::printf("Break here");
+}
+
 int main() {
   StringMapT string_map;
   {
@@ -35,6 +42,11 @@
     StringMapT tmp{{"Hello", "World"}};
     check_references(tmp, tmp, tmp, tmp, StringMapT{tmp}, StringMapT{tmp},
                      &tmp);
+
+    StringMapT *tmp_ptr = &tmp;
+    const StringMapT *const_tmp_ptr = &tmp;
+    check_pointer(tmp_ptr, tmp_ptr, tmp_ptr, &const_tmp_ptr, &tmp_ptr,
+                  &tmp_ptr);
   }
 
   return 0;