| from __future__ import print_function, division, absolute_import |
| from fontTools.misc.py23 import * |
| from fontTools.misc.fixedTools import fixedToFloat, floatToFixed |
| import unittest |
| |
| |
| class FixedToolsTest(unittest.TestCase): |
| |
| def test_roundtrip(self): |
| for bits in range(0, 15): |
| for value in range(-(2**(bits+1)), 2**(bits+1)): |
| self.assertEqual(value, floatToFixed(fixedToFloat(value, bits), bits)) |
| |
| def test_fixedToFloat_precision14(self): |
| self.assertEqual(0.8, fixedToFloat(13107, 14)) |
| self.assertEqual(0.0, fixedToFloat(0, 14)) |
| self.assertEqual(1.0, fixedToFloat(16384, 14)) |
| self.assertEqual(-1.0, fixedToFloat(-16384, 14)) |
| self.assertEqual(0.99994, fixedToFloat(16383, 14)) |
| self.assertEqual(-0.99994, fixedToFloat(-16383, 14)) |
| |
| def test_fixedToFloat_precision6(self): |
| self.assertAlmostEqual(-9.98, fixedToFloat(-639, 6)) |
| self.assertAlmostEqual(-10.0, fixedToFloat(-640, 6)) |
| self.assertAlmostEqual(9.98, fixedToFloat(639, 6)) |
| self.assertAlmostEqual(10.0, fixedToFloat(640, 6)) |
| |
| def test_floatToFixed_precision14(self): |
| self.assertEqual(13107, floatToFixed(0.8, 14)) |
| self.assertEqual(16384, floatToFixed(1.0, 14)) |
| self.assertEqual(16384, floatToFixed(1, 14)) |
| self.assertEqual(-16384, floatToFixed(-1.0, 14)) |
| self.assertEqual(-16384, floatToFixed(-1, 14)) |
| self.assertEqual(0, floatToFixed(0, 14)) |
| |
| def test_fixedToFloat_return_float(self): |
| value = fixedToFloat(16384, 14) |
| self.assertIsInstance(value, float) |
| |
| |
| if __name__ == "__main__": |
| import sys |
| sys.exit(unittest.main()) |
