prevent test directory overwrites for activation

Author: jmitrevs

test/pytest/test_keras_api.py

@@ -80,13 +80,13 @@ def test_dense(backend, io_type):
 @pytest.mark.parametrize(
     "activation_function",
     [
-        Activation(activation='relu', name='Activation'),
+        Activation(activation='relu', name='relu'),
         LeakyReLU(alpha=1.0),
         ELU(alpha=1.0),
         PReLU(
             alpha_initializer="zeros",
         ),
-        Activation(activation='sigmoid', name='Activation'),
+        Activation(activation='sigmoid', name='sigmoid'),
     ],
 )
 # ThresholdedReLU(theta=1.0)])
@@ -101,9 +101,7 @@ def test_activations(activation_function, backend, io_type):
     X_input = np.random.rand(100, 1)
     keras_prediction = model.predict(X_input)
     config = hls4ml.utils.config_from_keras_model(model)
-    output_dir = str(
-        test_root_path / f'hls4mlprj_keras_api_activations_{activation_function.__class__.__name__}_{backend}_{io_type}'
-    )
+    output_dir = str(test_root_path / f'hls4mlprj_keras_api_activations_{activation_function.name}_{backend}_{io_type}')
     hls_model = hls4ml.converters.convert_from_keras_model(
         model, hls_config=config, output_dir=output_dir, backend=backend, io_type=io_type
     )