Write unit-tests (#480)

* Write unit-tests

* Fix CI/CD for Windows unit-tests

* Restore commented code

* Update development.rst

* Remove unused files

* Chesk signal spy instances

* Add data flow test

* Fix

Author: paceholder

.github/workflows/cmake_build.yml

@@ -69,7 +69,9 @@ jobs:
 
     - name: Setup (Linux)
       if: startsWith (matrix.os, 'ubuntu')
-      run: sudo apt-get install libxkbcommon-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install libxkbcommon-dev xvfb
 
     - name: Setup VS tools (Windows)
       if: startsWith (matrix.os, 'windows')
@@ -82,3 +84,21 @@ jobs:
 
     - name: Build with ${{ matrix.compiler }}
       run: cmake --build build --config ${{ matrix.configuration }}
+
+    - name: Run Tests (Linux)
+      if: startsWith (matrix.os, 'ubuntu')
+      run: |
+        cd build
+        xvfb-run -a ctest --output-on-failure --progress
+
+    - name: Run Tests (macOS)
+      if: startsWith (matrix.os, 'macos')
+      run: |
+        cd build
+        ctest --output-on-failure --progress
+
+    - name: Run Tests (Windows)
+      if: startsWith (matrix.os, 'windows')
+      run: |
+        cd build
+        ctest -C ${{ matrix.configuration }} --output-on-failure --progress

.travis.yml

@@ -13,6 +13,10 @@ set(CMAKE_DISABLE_SOURCE_CHANGES  ON)
 set(OpenGL_GL_PREFERENCE LEGACY)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
+# Enable AUTOMOC globally for all targets (needed for examples with Q_OBJECT)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+
 get_directory_property(_has_parent PARENT_DIRECTORY)
 if(_has_parent)
   set(is_root_project OFF)
@@ -30,8 +34,6 @@ option(BUILD_DEBUG_POSTFIX_D "Append d suffix to debug libraries" OFF)
 option(QT_NODES_FORCE_TEST_COLOR "Force colorized unit test output" OFF)
 option(USE_QT6 "Build with Qt6 (Enabled by default)" ON)
 
-enable_testing()
-
 if(QT_NODES_DEVELOPER_DEFAULTS)
   set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/bin")
   set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib")
@@ -191,12 +193,6 @@ set_target_properties(QtNodes
     RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin
 )
 
-######
-# Moc
-##
-set_target_properties(QtNodes PROPERTIES AUTOMOC ON AUTORCC ON)
-
-
 ###########
 # Examples
 ##
@@ -212,9 +208,11 @@ endif()
 ##################
 # Automated Tests
 ##
+enable_testing()
+
 
 if(BUILD_TESTING)
-  #add_subdirectory(test)
+  add_subdirectory(test)
 endif()
 
 ###############

CMakeLists.txt

@@ -136,10 +136,13 @@ Qt Creator
 ----------
 
 1. Open `CMakeLists.txt` as project.
-2. If you don't have the `Catch2` library installed, go to `Build Settings`, disable the checkbox `BUILD_TESTING`.
-3. `Build -> Run CMake`
-4. `Build -> Build All`
-5. Click the button `Run`
+2. `Build -> Run CMake`
+3. `Build -> Build All`
+4. Click the button `Run`
+
+.. note::
+   The project includes unit tests built with Catch2. If you don't have Catch2 installed, 
+   you can disable testing by setting `-DBUILD_TESTING=OFF` in CMake configuration.
 
 
 With Cmake using `vcpkg`
@@ -153,6 +156,39 @@ With Cmake using `vcpkg`
    -DCMAKE_TOOLCHAIN_FILE=<vcpkg_dir>/scripts/buildsystems/scripts/buildsystems/vcpkg.cmake
 
 
+Testing
+=======
+
+QtNodes includes a comprehensive unit test suite built with Catch2.
+
+**Running Tests**
+
+From the build directory:
+
+::
+
+    # Build tests
+    make test_nodes
+    
+    # Run all tests
+    ./bin/test_nodes
+    
+    # Run specific categories
+    ./bin/test_nodes "[core]"        # Core functionality tests
+    ./bin/test_nodes "[graphics]"    # Graphics system tests
+
+**Test Coverage**
+
+* Core model operations (node CRUD, connections)
+* Signal emission verification (AbstractGraphModel signals)
+* Serialization (JSON save/load) 
+* Undo system integration
+* Graphics scene management
+* Connection utilities
+
+For detailed testing documentation, see the `Testing Guide <https://qtnodes.readthedocs.io/en/latest/testing.html>`_.
+
+
 Help Needed
 ===========
 

README.rst

@@ -7,12 +7,19 @@ Development Progress
 - [✅ done] Dynamic ports
 - [✅ done] ``AbstractNodeGeometry``, ``AbstractNodePainter``
 - [✅ done] Website with documentation
-- [✅] ``ConnectionPaintDelegate``
-- [➡️  work in progress] Unit-Tests
-- [➡️  work in progress] Ctrl+D for copying and inserting a selection duplicate
+- [✅ done] ``ConnectionPaintDelegate``
+- [✅ done] Unit-Tests
+- [✅ done] Ctrl+D for copying and inserting a selection duplicate
 - [⏸ not started] Node groups
 - [⏸ not started] Check how styles work and what needs to be done. See old pull-requests
 - [☝ help needed] Python bindings. Maybe a wrapper using Shiboken
   - Python examples
 - [☝ help needed] QML front-end
 
+
+Testing
+=======
+
+QtNodes includes a comprehensive unit test suite. For detailed information about 
+running tests, test coverage, and implementation details, see :doc:`testing`.
+

docs/development.rst

@@ -10,6 +10,7 @@ QtNodes Documentation
     features
     porting
     development
+    testing
     classes
     notes
     license_link