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Fix Huffman edge cases and add CMake tests #4

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1 change: 1 addition & 0 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -30,3 +30,4 @@
*.exe
*.out
*.app
build/
21 changes: 21 additions & 0 deletions CMakeLists.txt
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@@ -0,0 +1,21 @@
cmake_minimum_required(VERSION 3.10)
project(HuffmanCoding LANGUAGES CXX)

if(NOT CMAKE_CXX_COMPILER)
set(CMAKE_CXX_COMPILER g++)
endif()

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)

add_executable(huffmanCoding huffmanCoding.cpp huffman.cpp)
add_executable(huffmanDecoding huffmanDecoding.cpp huffman.cpp)

enable_testing()

set(HUFFMAN_TEST_SCRIPT ${CMAKE_SOURCE_DIR}/tests/run_tests.sh)
add_test(
NAME huffman_roundtrip
COMMAND bash ${HUFFMAN_TEST_SCRIPT} $<TARGET_FILE:huffmanCoding> $<TARGET_FILE:huffmanDecoding>
)
17 changes: 17 additions & 0 deletions README.md
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Expand Up @@ -21,3 +21,20 @@ The programs can compress and decompress text file consisting of 128 ASCII chara

1. Open file, recreate Huffman Tree based on Huffman Encode Table;
2. Decode the file based on the tree and store it to the desired file.

## Build and test

```bash
cmake -S . -B build -DCMAKE_CXX_COMPILER=g++
cmake --build build
ctest --test-dir build --output-on-failure
```

Run manually:

```bash
./build/huffmanCoding input.txt output.huf
./build/huffmanDecoding output.huf restored.txt
```

Input is limited to 7-bit ASCII bytes (0–127). Empty files and bytes >= 128 are rejected with an error message.
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