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+# Copyright © 2020 Arm Ltd. All rights reserved.
+# SPDX-License-Identifier: MIT
+import os
+
+import pytest
+import pyarmnn as ann
+import numpy as np
+
+
+@pytest.fixture()
+def parser(shared_data_folder):
+ """
+ Parse and setup the test network to be used for the tests below
+ """
+ parser = ann.ITfLiteParser()
+ parser.CreateNetworkFromBinaryFile(os.path.join(shared_data_folder, 'mock_model.tflite'))
+
+ yield parser
+
+
+def test_tflite_parser_swig_destroy():
+ assert ann.ITfLiteParser.__swig_destroy__, "There is a swig python destructor defined"
+ assert ann.ITfLiteParser.__swig_destroy__.__name__ == "delete_ITfLiteParser"
+
+
+def test_check_tflite_parser_swig_ownership(parser):
+ # Check to see that SWIG has ownership for parser. This instructs SWIG to take
+ # ownership of the return value. This allows the value to be automatically
+ # garbage-collected when it is no longer in use
+ assert parser.thisown
+
+
+def test_tflite_get_sub_graph_count(parser):
+ graphs_count = parser.GetSubgraphCount()
+ assert graphs_count == 1
+
+
+def test_tflite_get_network_input_binding_info(parser):
+ graphs_count = parser.GetSubgraphCount()
+ graph_id = graphs_count - 1
+
+ input_names = parser.GetSubgraphInputTensorNames(graph_id)
+
+ input_binding_info = parser.GetNetworkInputBindingInfo(graph_id, input_names[0])
+
+ tensor = input_binding_info[1]
+ assert tensor.GetDataType() == 2
+ assert tensor.GetNumDimensions() == 4
+ assert tensor.GetNumElements() == 784
+ assert tensor.GetQuantizationOffset() == 128
+ assert tensor.GetQuantizationScale() == 0.007843137718737125
+
+
+def test_tflite_get_network_output_binding_info(parser):
+ graphs_count = parser.GetSubgraphCount()
+ graph_id = graphs_count - 1
+
+ output_names = parser.GetSubgraphOutputTensorNames(graph_id)
+
+ output_binding_info1 = parser.GetNetworkOutputBindingInfo(graph_id, output_names[0])
+
+ # Check the tensor info retrieved from GetNetworkOutputBindingInfo
+ tensor1 = output_binding_info1[1]
+
+ assert tensor1.GetDataType() == 2
+ assert tensor1.GetNumDimensions() == 2
+ assert tensor1.GetNumElements() == 10
+ assert tensor1.GetQuantizationOffset() == 0
+ assert tensor1.GetQuantizationScale() == 0.00390625
+
+
+def test_tflite_get_subgraph_input_tensor_names(parser):
+ graphs_count = parser.GetSubgraphCount()
+ graph_id = graphs_count - 1
+
+ input_names = parser.GetSubgraphInputTensorNames(graph_id)
+
+ assert input_names == ('input_1',)
+
+
+def test_tflite_get_subgraph_output_tensor_names(parser):
+ graphs_count = parser.GetSubgraphCount()
+ graph_id = graphs_count - 1
+
+ output_names = parser.GetSubgraphOutputTensorNames(graph_id)
+
+ assert output_names[0] == 'dense/Softmax'
+
+
+def test_tflite_filenotfound_exception(shared_data_folder):
+ parser = ann.ITfLiteParser()
+
+ with pytest.raises(RuntimeError) as err:
+ parser.CreateNetworkFromBinaryFile(os.path.join(shared_data_folder, 'some_unknown_network.tflite'))
+
+ # Only check for part of the exception since the exception returns
+ # absolute path which will change on different machines.
+ assert 'Cannot find the file' in str(err.value)
+
+
+def test_tflite_parser_end_to_end(shared_data_folder):
+ parser = ann.ITfLiteParser()
+
+ network = parser.CreateNetworkFromBinaryFile(os.path.join(shared_data_folder, "mock_model.tflite"))
+
+ graphs_count = parser.GetSubgraphCount()
+ graph_id = graphs_count - 1
+
+ input_names = parser.GetSubgraphInputTensorNames(graph_id)
+ input_binding_info = parser.GetNetworkInputBindingInfo(graph_id, input_names[0])
+
+ output_names = parser.GetSubgraphOutputTensorNames(graph_id)
+
+ preferred_backends = [ann.BackendId('CpuAcc'), ann.BackendId('CpuRef')]
+
+ options = ann.CreationOptions()
+ runtime = ann.IRuntime(options)
+
+ opt_network, messages = ann.Optimize(network, preferred_backends, runtime.GetDeviceSpec(), ann.OptimizerOptions())
+ assert 0 == len(messages)
+
+ net_id, messages = runtime.LoadNetwork(opt_network)
+ assert "" == messages
+
+ # Load test image data stored in input_lite.npy
+ input_tensor_data = np.load(os.path.join(shared_data_folder, 'tflite_parser/input_lite.npy'))
+ input_tensors = ann.make_input_tensors([input_binding_info], [input_tensor_data])
+
+ output_tensors = []
+ for index, output_name in enumerate(output_names):
+ out_bind_info = parser.GetNetworkOutputBindingInfo(graph_id, output_name)
+ out_tensor_info = out_bind_info[1]
+ out_tensor_id = out_bind_info[0]
+ output_tensors.append((out_tensor_id,
+ ann.Tensor(out_tensor_info)))
+
+ runtime.EnqueueWorkload(net_id, input_tensors, output_tensors)
+
+ output_vectors = []
+ for index, out_tensor in enumerate(output_tensors):
+ output_vectors.append(out_tensor[1].get_memory_area())
+
+ # Load golden output file for result comparison.
+ expected_outputs = np.load(os.path.join(shared_data_folder, 'tflite_parser/golden_output_lite.npy'))
+
+ # Check that output matches golden output
+ assert (expected_outputs == output_vectors[0]).all()