Coverage for test/d7a/types/test_ct.py: 87%

31 statements  

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1# 

2# Copyright (c) 2015-2021 University of Antwerp, Aloxy NV. 

3# 

4# This file is part of pyd7a. 

5# See https://github.com/Sub-IoT/pyd7a for further info. 

6# 

7# Licensed under the Apache License, Version 2.0 (the "License"); 

8# you may not use this file except in compliance with the License. 

9# You may obtain a copy of the License at 

10# 

11# http://www.apache.org/licenses/LICENSE-2.0 

12# 

13# Unless required by applicable law or agreed to in writing, software 

14# distributed under the License is distributed on an "AS IS" BASIS, 

15# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

16# See the License for the specific language governing permissions and 

17# limitations under the License. 

18# 

19 

20# unit tests for Compressed Time 

21 

22import unittest 

23 

24from d7a.types.ct import CT 

25 

26class TestCT(unittest.TestCase): 

27 def test_default_constructor_is_zero(self): 

28 t = CT() 

29 self.assertEqual(int(t), 0) 

30 

31 def test_ct_construction(self): 

32 for exp in [1, 7]: 

33 for mant in [1, 31]: 

34 try: 

35 t = CT(exp=exp, mant=mant) 

36 except ValueError: 

37 self.fail("CT constructor raised ExceptionType unexpectedly " + 

38 "for exp={0}, mant={1}".format(exp, mant)) 

39 

40 def test_invalid_ct_constructions(self): 

41 def bad(args, kwargs): CT(**kwargs) 

42 self.assertRaises(ValueError, bad, [], { "exp" : -1 }) 

43 self.assertRaises(ValueError, bad, [], { "mant" : -1 }) 

44 self.assertRaises(ValueError, bad, [], { "exp" : 8 }) 

45 self.assertRaises(ValueError, bad, [], { "mant" : 32 }) 

46 

47 def test_ct_conversion_to_int(self): 

48 self.assertEqual(int(CT(1,1)), 4) 

49 self.assertEqual(int(CT(2,2)), 32) 

50 self.assertEqual(int(CT(3,3)), 192) 

51 

52 def test_byte_generation(self): 

53 self.assertEqual( bytearray(CT(1, 1))[0], int('00100001', 2)) 

54 self.assertEqual( bytearray(CT(7,31))[0], int('11111111', 2)) 

55 

56 def test_compress(self): 

57 self.assertEqual(1024, CT.compress(1024).decompress()) 

58 

59if __name__ == '__main__': 

60 suite = unittest.TestLoader().loadTestsFromTestCase(TestCT) 

61 unittest.TextTestRunner(verbosity=2).run(suite)