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# Copyright 2021 Huawei Technologies Co., Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ============================================================================
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# """test_dice"""
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import math
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import numpy as np
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import pytest
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from mindspore import Tensor
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from mindspore.nn.metrics import get_metric_fn, Dice
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def test_classification_dice():
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"""test_dice"""
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x = Tensor(np.array([[0.2, 0.5], [0.3, 0.1], [0.9, 0.6]]))
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y = Tensor(np.array([[0, 1], [1, 0], [0, 1]]))
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metric = get_metric_fn('dice')
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metric.clear()
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metric.update(x, y)
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dice = metric.eval()
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assert math.isclose(dice, 0.20467791371802546, abs_tol=0.001)
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def test_dice_update1():
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x = Tensor(np.array([[0.2, 0.5, 0.7], [0.3, 0.1, 0.2], [0.9, 0.6, 0.5]]))
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metric = Dice(1e-5)
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metric.clear()
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with pytest.raises(ValueError):
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metric.update(x)
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def test_dice_runtime():
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metric = Dice(1e-5)
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metric.clear()
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with pytest.raises(RuntimeError):
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metric.eval()
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