import pytest
import os

from datetime import datetime, timedelta
from netCDF4 import Dataset
import numpy as np
import random
import string

from tests.TestUtils import TestUtils
from SDToolBox.data_acquisition import OutputData


class Test_create:

    @pytest.mark.unittest
    def test_when_no_dataset_given_then_exception_risen(self):
        output_result = None
        with pytest.raises(IOError) as e_info:
            output_result = OutputData(None, None, None, None)

        error_message = str(e_info.value)
        assert output_result is None
        assert error_message == 'Original dataset should be given'

    @pytest.mark.unittest
    def test_when_no_lat_values_given_then_exception_risen(self):
        output_result = None
        with pytest.raises(IOError) as e_info:
            output_result = OutputData(4.2, None, None, None)

        error_message = str(e_info.value)
        assert output_result is None
        assert error_message == 'Lateral values should be given'

    @pytest.mark.unittest
    def test_when_no_lon_values_given_then_exception_risen(self):
        output_result = None
        with pytest.raises(IOError) as e_info:
            output_result = OutputData(4.2, 42, None, None)

        error_message = str(e_info.value)
        assert output_result is None
        assert error_message == 'Longitude values should be given'

    @pytest.mark.unittest
    def test_when_no_time_values_given_then_exception_risen(self):
        output_result = None
        with pytest.raises(IOError) as e_info:
            output_result = OutputData(4.2, 42, 2.4, None)

        error_message = str(e_info.value)
        assert output_result is None
        assert error_message == 'Time values should be given'


class Test_generate_gtsm_netcdf:

    @pytest.mark.systemtest
    def test_when_given_wave_cases_generates_output(self):
        pytest.faile('ToDo')
        pass