Paddle/python/paddle/v2/fluid/tests/test_log_loss_op.py

import unittest
import numpy as np
from op_test import OpTest


class TestLogLossOp(OpTest):
    def setUp(self):
        self.op_type = 'log_loss'
        samples_num = 32

        predicted = np.random.uniform(0.1, 1.0,
                                      (samples_num, 1)).astype("float32")
        labels = np.random.randint(0, 2, (samples_num, 1)).astype("float32")
        epsilon = 1e-4
        self.inputs = {
            'Predicted': predicted,
            'Labels': labels,
        }

        self.attrs = {'epsilon': epsilon}
        loss = -labels * np.log(predicted + epsilon) - (
            1 - labels) * np.log(1 - predicted + epsilon)
        self.outputs = {'Loss': loss}

    def test_check_output(self):
        self.check_output()

    def test_check_grad(self):
        self.check_grad(['Predicted'], 'Loss', max_relative_error=0.03)


if __name__ == '__main__':
    unittest.main()