[lldb-dap] Add unit tests for LLDBUtils (NFC)

Author: JDevlieghere

lldb/unittests/DAP/CMakeLists.txt

@@ -1,5 +1,6 @@
 add_lldb_unittest(DAPTests
   JSONUtilsTest.cpp
+  LLDBUtilsTest.cpp
 
   LINK_LIBS
     lldbDAP

lldb/unittests/DAP/LLDBUtilsTest.cpp

@@ -0,0 +1,46 @@
+//===-- LLDBUtilsTest.cpp -------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "LLDBUtils.h"
+#include "lldb/API/SBStructuredData.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace lldb;
+using namespace lldb_dap;
+
+TEST(LLDBUtilsTest, GetStringValue) {
+  // Create an SBStructuredData object from JSON.
+  const char *json_data = R"("test_string")";
+  SBStructuredData data;
+  SBError error = data.SetFromJSON(json_data);
+
+  // Ensure the JSON was parsed successfully.
+  ASSERT_TRUE(error.Success());
+  ASSERT_TRUE(data.IsValid());
+
+  // Call GetStringValue and verify the result.
+  std::string result = GetStringValue(data);
+  EXPECT_EQ(result, "test_string");
+
+  // Test with invalid SBStructuredData.
+  SBStructuredData invalid_data;
+  result = GetStringValue(invalid_data);
+  EXPECT_EQ(result, "");
+
+  // Test with empty JSON.
+  const char *empty_json = R"("")";
+  SBStructuredData empty_data;
+  error = empty_data.SetFromJSON(empty_json);
+
+  ASSERT_TRUE(error.Success());
+  ASSERT_TRUE(empty_data.IsValid());
+
+  result = GetStringValue(empty_data);
+  EXPECT_EQ(result, "");
+}