QGIS and Python installed correctly, test fails on comparing files.

TESTED WITH DIFFERENT VERSION OF PYTHON TEST FILE AND DIFFLIB LINE BY LINE SHOWS NO DIFFERENCES BUT FILECMP FAILS
--------------------------------------------------------------------------

Run export QGIS_PREFIX_PATH="/usr"
============================= test session starts ==============================
platform linux -- Python 3.10.12, pytest-8.2.2, pluggy-1.5.0
PyQt6 6.7.0 -- Qt runtime 6.7.1 -- Qt compiled 6.7.1
rootdir: /home/runner/work/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP
plugins: qt-4.4.0
collected 5 items

test/test_qgis_color_func.py ....F                                       [100%]

=================================== FAILURES ===================================
_______________________________ test_OutputFile ________________________________

    def test_OutputFile():
        """
        Check if the output table is created correctly.
        Compare it with reference file.
        """
        # Get the GRASS color table
        GRASStable_path = getCORINEtable()
    
        # Create a temporary qml file
        tempdir = tempfile.mkdtemp()
        Tempfile = os.path.join(tempdir, "tempfile.qml")
    
        # Convert the GRASS color table to QGIS format
        convert_color_table_grass_to_qgis(GRASStable_path, Tempfile)
    
        # Normalize line endings of the generated QML file
        with open(Tempfile, 'r') as f:
            content = f.read()
        normalized_content = normalize_line_endings(content)
        write_with_lf_line_endings(normalized_content, Tempfile)
    
        # Check if the output table is created correctly
        script_dir = Path(__file__).resolve().parent
    
        # Construct the path to the target directory
        target_dir = script_dir.parent / "test" / "reference"
    
        # Specify the filename you want to access
        filename = "corine.qml"
    
        # Create the full path to the file
        CORINE_file_path = target_dir / filename
    
        with open(Tempfile, 'r') as gen_file:
            gen_content = gen_file.read()
        with open(CORINE_file_path, 'r') as ref_file:
            ref_content = ref_file.read()
    
        # Compare content line by line
        gen_lines = gen_content.splitlines(keepends=True)
        ref_lines = ref_content.splitlines(keepends=True)
        diff = difflib.unified_diff(gen_lines, ref_lines, fromfile='generated', tofile='reference')
        diff_str = ''.join(diff)
        if diff_str:
            print("Differences found:\n", diff_str)
        else:
            print("No differences found.")
    
>       assert filecmp.cmp(Tempfile, CORINE_file_path, shallow=False)
E       AssertionError: assert False
E        +  where False = <function cmp at 0x7f578b87dea0>('/tmp/tmp53igm9nx/tempfile.qml', PosixPath('/home/runner/work/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP/test/reference/corine.qml'), shallow=False)
E        +    where <function cmp at 0x7f578b87dea0> = filecmp.cmp

test/test_qgis_color_func.py:199: AssertionError
----------------------------- Captured stdout call -----------------------------
No differences found.
=========================== short test summary info ============================
FAILED test/test_qgis_color_func.py::test_OutputFile - AssertionError: assert False
 +  where False = <function cmp at 0x7f578b87dea0>('/tmp/tmp53igm9nx/tempfile.qml', PosixPath('/home/runner/work/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP/GRASS-GIS-Q-GIS-color-table-conversion-BACKUP/test/reference/corine.qml'), shallow=False)
 +    where <function cmp at 0x7f578b87dea0> = filecmp.cmp
========================= 1 failed, 4 passed in 0.46s ==========================
Error: Process completed with exit code 1.

.github/workflows/test_qgis_color_func.yml

@@ -6,11 +6,6 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
-    env:
-      QGIS_VERSION: '3.34' 
-      QGIS_PREFIX_PATH: '/usr'
-      PYTHONPATH: '${PYTHONPATH}:${QGIS_PREFIX_PATH}/share/qgis/python'
-
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
@@ -19,21 +14,23 @@ jobs:
       run: |
         sudo add-apt-repository -y ppa:ubuntugis/ppa
         sudo apt-get update
-        sudo apt-get install -y qgis python3-qgis qgis-plugin-grass
-
-        python3 -m pip install --upgrade pip
-        pip install pytest pytest-qt PyQt5
-
+        sudo apt-get install -y qgis python3.10 python3.10-dev python3-pip
+        sudo apt-get install -y qgis-plugin-grass
+        python3.10 -m pip install --upgrade pip
+        python3.10 -m pip install pytest pytest-qt PyQt6
+        sudo apt-get install -y gdb
     - name: Set up QGIS environment variables
       run: |
-        export PYTHONPATH="${PYTHONPATH}:${QGIS_PREFIX_PATH}/share/qgis/python"
+        echo "QGIS_PREFIX_PATH=/usr" >> $GITHUB_ENV
+        echo "PYTHONPATH=/usr/share/qgis/python:$GITHUB_WORKSPACE" >> $GITHUB_ENV
+        echo "LD_LIBRARY_PATH=/usr/lib" >> $GITHUB_ENV
+        echo "QGIS_DEBUG=0" >> $GITHUB_ENV
+        echo "QGIS_LOG_FILE=/dev/null" >> $GITHUB_ENV
+    - name: Run tests
+      run: |
         export QGIS_PREFIX_PATH="/usr"
-        export LD_LIBRARY_PATH="${QGIS_PREFIX_PATH}/lib"
+        export PYTHONPATH="/usr/share/qgis/python:$GITHUB_WORKSPACE"
+        export LD_LIBRARY_PATH="/usr/lib"
         export QGIS_DEBUG=0
         export QGIS_LOG_FILE=/dev/null
-
-    - name: Initialize QGIS
-      run: python3 -c "from qgis.core import QgsApplication; QgsApplication.setPrefixPath('${QGIS_PREFIX_PATH}', True); QgsApplication.initQgis()"
-
-    - name: Run tests
-      run: pytest test/test_qgis_color_func.py
+        pytest test/test_qgis_color_func.py