Test export now clean successfull tests.

Current test_export.py generate a lot of export folder and does not clean afterward.

This MR make so taht if the test is successfull then the test remove the export folder.

aidge_export_cpp/unit_tests/test_export.py

@@ -12,6 +12,9 @@ import shutil
 from aidge_core.utils import run_command
 
 from aidge_export_cpp import cpp_fuse_to_metaops, set_nodes_names
+import pytest
+from _pytest.unittest import TestCaseFunction
+
 
 def initFiller(model):
     # Initialize parameters (weights and biases)
@@ -64,15 +67,40 @@ def _np_init_ones(shape, default_value=0.01, dtype=np.float32):
     return data.reshape(shape).astype(dtype)
 
 
+# Global dictionary to store test reports
+test_reports = {}
+
+@pytest.hookimpl(hookwrapper=True)
+def pytest_runtest_makereport(item, call):
+    # Execute all other hooks to obtain the report object
+    outcome = yield
+    rep = outcome.get_result()
+    # Store the report in the global dictionary
+    test_reports[item.nodeid] = rep
+
 class test_operator_export(unittest.TestCase):
 
     def setUp(self):
-        # TODO change seed at each test ?
         RNG_SEED = 1234
         np.random.seed(RNG_SEED)
         aidge_core.random.Generator.set_seed(RNG_SEED)
+
     def tearDown(self):
-        pass
+        result = self._outcome.result
+        test_succeeded = True
+        if isinstance(result, TestCaseFunction):
+            print("Test ran with pytest cannot retrieve if the test was a success.")
+        else:
+            test_succeeded = not any(test is self for test, _ in result.failures + result.errors)
+        if test_succeeded:
+            shutil.rmtree(self.export_folder)
+
+        # rep = test_reports.get(self.id())
+        # if rep is not None and rep.passed:
+        #     # Perform teardown actions only if the test passed
+        #     print(g"Removing {self.export_folder}")
+        #     shutil.rmtree(self.export_folder, ignore_errors=True)
+
 
     def unit_test_export(self, graph_view, op_name, in_dims, random_inputs=True, random_weights=True, default_value=0.01):
         """
@@ -117,7 +145,7 @@ class test_operator_export(unittest.TestCase):
 
         # Note the convention ``<op_name>_test`` is useful for gitignore to avoid pushing generated export by accident.
         export_folder = op_name + "_test"
-
+        self.export_folder = export_folder
         shutil.rmtree(export_folder, ignore_errors=True)
 
         # Export the model in C++ standalone
@@ -624,10 +652,6 @@ class test_operator_export(unittest.TestCase):
 
         self.unit_test_export(model, "BatchNorm2DDenser", [[1, 3, 5, 7]], False, False)
 
-
-    def test_cpp(self):
-        print("Export test to do")
-
     def test_Conv(self):
         model = aidge_core.sequential([
             aidge_core.Conv2D(1, 1, [3, 3], name="InputNode")