1 | """ |
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2 | Unit tests for the SESANS .ses reader |
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3 | """ |
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4 | |
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5 | import os.path |
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6 | import unittest |
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7 | from sas.sascalc.dataloader.loader_exceptions import FileContentsException,\ |
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8 | DefaultReaderException |
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9 | from sas.sascalc.dataloader.readers.sesans_reader import Reader |
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10 | from sas.sascalc.dataloader.loader import Loader |
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11 | |
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12 | |
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13 | def find(filename): |
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14 | return os.path.join(os.path.dirname(__file__), filename) |
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15 | |
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16 | |
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17 | class sesans_reader(unittest.TestCase): |
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18 | |
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19 | def setUp(self): |
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20 | reader = Reader() |
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21 | self.loader = reader.read |
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22 | |
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23 | def test_full_load(self): |
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24 | """ |
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25 | Test .SES in the full loader to make sure that the file type is correctly accepted |
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26 | """ |
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27 | file = Loader().load(find("sesans_examples/sphere2micron.ses")) |
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28 | f = file[0] |
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29 | # self.assertEqual(f, 5) |
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30 | self.assertEqual(len(file), 1) |
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31 | self.assertEqual(len(f.x), 40) |
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32 | self.assertEqual(f.x[0], 391.56) |
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33 | self.assertEqual(f.x[-1], 46099) |
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34 | self.assertEqual(f.y[-1], -0.19956) |
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35 | self.assertEqual(f.x_unit, "A") |
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36 | self.assertEqual(f.y_unit, "A-2 cm-1") |
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37 | self.assertEqual(f.sample.name, "Polystyrene 2 um in 53% H2O, 47% D2O") |
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38 | self.assertEqual(f.sample.thickness, 0.2) |
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39 | self.assertEqual(f.sample.zacceptance, (0.0168, "radians")) |
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40 | self.assertEqual(f.isSesans, True) |
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41 | |
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42 | def test_sesans_tof(self): |
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43 | """ |
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44 | Test .SES loading on a TOF dataset |
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45 | """ |
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46 | file = self.loader(find("sesans_examples/sphere_isis.ses")) |
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47 | f = file[0] |
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48 | self.assertEqual(len(file), 1) |
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49 | self.assertEqual(len(f.x), 57) |
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50 | self.assertEqual(f.x[-1], 19303.4) |
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51 | self.assertEqual(f.source.wavelength[-1], 13.893668) |
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52 | self.assertEqual(f.source.wavelength[0], 1.612452) |
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53 | self.assertEqual(f.sample.yacceptance, (0.09, "radians")) |
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54 | self.assertEqual(f.sample.zacceptance, (0.09, "radians")) |
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55 | self.assertEqual(f.sample.thickness, 0.2) |
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56 | |
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57 | def test_sesans_no_data(self): |
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58 | """ |
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59 | Confirm that sesans files with no actual data won't load. |
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60 | """ |
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61 | self.assertRaises( |
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62 | FileContentsException, |
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63 | self.loader, |
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64 | find("sesans_examples/sesans_no_data.ses")) |
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65 | |
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66 | def test_sesans_no_spin_echo_unit(self): |
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67 | """ |
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68 | Confirm that sesans files with no units from the spin echo length raise an appropriate error |
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69 | """ |
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70 | self.assertRaises( |
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71 | FileContentsException, |
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72 | self.loader, |
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73 | find("sesans_examples/no_spin_echo_unit.ses")) |
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74 | |
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75 | def test_sesans_future_version(self): |
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76 | """ |
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77 | Confirm that sesans files that, according to semantic version, are from a future, backwards-incompatible version of the SES file format throw an exception. |
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78 | """ |
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79 | self.assertRaises( |
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80 | FileContentsException, |
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81 | self.loader, |
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82 | find("sesans_examples/next_gen.ses")) |
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83 | |
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84 | def test_sesans_mandatory_headers(self): |
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85 | """ |
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86 | Confirm that sesans files throw an exception if one of the mandator headers is missing. |
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87 | """ |
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88 | self.assertRaises( |
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89 | FileContentsException, |
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90 | self.loader, |
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91 | find("sesans_examples/no_wavelength.ses")) |
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92 | |
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93 | def test_sesans_columns_match_headers(self): |
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94 | """ |
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95 | Confirm that sesans files throw an exception if one of the mandator headers is missing. |
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96 | """ |
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97 | self.assertRaises( |
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98 | FileContentsException, |
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99 | self.loader, |
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100 | find("sesans_examples/too_many_headers.ses")) |
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101 | |
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102 | if __name__ == "__main__": |
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103 | unittest.main() |
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