Add new tests to codebase

CMakeLists.txt

@@ -1,17 +1,48 @@
 cmake_minimum_required(VERSION 3.10)
 project(GenLeetcodeQuestion)
 
-# Specify vcpkg toolchain
-set(CMAKE_TOOLCHAIN_FILE "C:/vcpkg/scripts/buildsystems/vcpkg.cmake")
+# Enable C++11 standard
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Specify vcpkg toolchain (only if on Windows with vcpkg)
+if(EXISTS "C:/vcpkg/scripts/buildsystems/vcpkg.cmake")
+    set(CMAKE_TOOLCHAIN_FILE "C:/vcpkg/scripts/buildsystems/vcpkg.cmake")
+endif()
 
 find_package(nlohmann_json CONFIG REQUIRED)
 find_package(CURL REQUIRED)
 
-set(CURL_INCLUDE_DIR "C:/vcpkg/installed/x64-windows/include")
-set(CURL_LIBRARY "C:/vcpkg/installed/x64-windows/lib/libcurl.a")
-set(CMAKE_BUILD_TYPE Debug)
-add_executable(main main.cpp)
+# Set build type if not specified
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE Debug)
+endif()
 
-target_link_libraries(main PRIVATE nlohmann_json::nlohmann_json)
+# Create a library with the utility functions
+add_library(utils utils.cpp)
+target_link_libraries(utils PUBLIC nlohmann_json::nlohmann_json)
+
+# Main executable
+add_executable(main main.cpp)
+target_link_libraries(main PRIVATE utils nlohmann_json::nlohmann_json CURL::libcurl)
 
-target_link_libraries(main PRIVATE CURL::libcurl)
+# Test executable (optional, requires Google Test)
+option(BUILD_TESTS "Build the tests" ON)
+if(BUILD_TESTS)
+    # Try to find Google Test
+    find_package(GTest QUIET)
+
+    if(GTest_FOUND)
+        enable_testing()
+
+        add_executable(test_main test_main.cpp)
+        target_link_libraries(test_main PRIVATE utils GTest::gtest GTest::gtest_main)
+
+        # Add test to CTest
+        add_test(NAME UtilsTests COMMAND test_main)
+
+        message(STATUS "Tests enabled - run 'ctest' or './test_main' to execute tests")
+    else()
+        message(WARNING "Google Test not found. Tests will not be built. Install with: sudo apt-get install libgtest-dev (Linux) or vcpkg install gtest (Windows)")
+    endif()
+endif()

TESTING.md

@@ -0,0 +1,78 @@
+# Testing Guide
+
+## Overview
+
+This project includes a comprehensive test suite using Google Test (gtest) to verify the functionality of the utility functions.
+
+## Test Coverage
+
+The test suite includes 22 tests across 3 test suites:
+
+### FormatHTMLToStringTest (11 tests)
+- HTML tag removal (simple and nested)
+- HTML entity conversion (<, >, &, 's,  )
+- Whitespace handling (newlines and tabs)
+- Edge cases (empty strings, complex HTML)
+
+### GetTestCasesTest (5 tests)
+- Single and multiple test case parsing
+- Empty content handling
+- Content without examples
+- Single and multiple parameter parsing
+
+### GetParamNameTest (6 tests)
+- Parameter name and value extraction
+- Various formatting (with/without spaces)
+- Complex array parameters
+- String parameters
+
+## Building and Running Tests
+
+### Prerequisites
+
+```bash
+sudo apt-get install libgtest-dev libcurl4-openssl-dev nlohmann-json3-dev cmake g++
+```
+
+### Build
+
+```bash
+mkdir -p build
+cd build
+cmake ..
+make
+```
+
+### Run Tests
+
+There are two ways to run the tests:
+
+1. **Direct execution:**
+```bash
+cd build
+./test_main
+```
+
+2. **Using CTest:**
+```bash
+cd build
+ctest --verbose
+```
+
+## Test Results
+
+All 22 tests currently pass:
+- ✅ 11/11 FormatHTMLToStringTest
+- ✅ 5/5 GetTestCasesTest  
+- ✅ 6/6 GetParamNameTest
+
+## Code Structure
+
+- `test_main.cpp` - Test implementation using Google Test framework
+- `utils.h` - Header file with function declarations
+- `utils.cpp` - Implementation of utility functions
+- `main.cpp` - Main application (uses the utilities)
+
+## Bug Fixes
+
+During test development, we identified and fixed boundary check issues in `FormatHTMLToString()` where HTML entities at the end of strings were not being processed correctly.