| from fontTools.misc.fixedTools import ( |
| fixedToFloat, |
| floatToFixed, |
| floatToFixedToStr, |
| fixedToStr, |
| strToFixed, |
| strToFixedToFloat, |
| ) |
| 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.assertAlmostEqual(0.7999878, 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.assertAlmostEqual(0.999939, fixedToFloat(16383, 14)) |
| self.assertAlmostEqual(-0.999939, fixedToFloat(-16383, 14)) |
| |
| def test_fixedToFloat_precision6(self): |
| self.assertAlmostEqual(-9.984375, fixedToFloat(-639, 6)) |
| self.assertAlmostEqual(-10.0, fixedToFloat(-640, 6)) |
| self.assertAlmostEqual(9.984375, fixedToFloat(639, 6)) |
| self.assertAlmostEqual(10.0, fixedToFloat(640, 6)) |
| |
| def test_fixedToStr_precision14(self): |
| self.assertEqual('0.8', fixedToStr(13107, 14)) |
| self.assertEqual('0.0', fixedToStr(0, 14)) |
| self.assertEqual('1.0', fixedToStr(16384, 14)) |
| self.assertEqual('-1.0', fixedToStr(-16384, 14)) |
| self.assertEqual('0.99994', fixedToStr(16383, 14)) |
| self.assertEqual('-0.99994', fixedToStr(-16383, 14)) |
| |
| def test_fixedToStr_precision6(self): |
| self.assertAlmostEqual('-9.98', fixedToStr(-639, 6)) |
| self.assertAlmostEqual('-10.0', fixedToStr(-640, 6)) |
| self.assertAlmostEqual('9.98', fixedToStr(639, 6)) |
| self.assertAlmostEqual('10.0', fixedToStr(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_strToFixed_precision14(self): |
| self.assertEqual(13107, strToFixed('0.8', 14)) |
| self.assertEqual(16384, strToFixed('1.0', 14)) |
| self.assertEqual(16384, strToFixed('1', 14)) |
| self.assertEqual(-16384, strToFixed('-1.0', 14)) |
| self.assertEqual(-16384, strToFixed('-1', 14)) |
| self.assertEqual(0, strToFixed('0', 14)) |
| |
| def test_strToFixedToFloat_precision14(self): |
| self.assertAlmostEqual(0.7999878, strToFixedToFloat('0.8', 14)) |
| self.assertEqual(0.0, strToFixedToFloat('0', 14)) |
| self.assertEqual(1.0, strToFixedToFloat('1.0', 14)) |
| self.assertEqual(-1.0, strToFixedToFloat('-1.0', 14)) |
| self.assertAlmostEqual(0.999939, strToFixedToFloat('0.99994', 14)) |
| self.assertAlmostEqual(-0.999939, strToFixedToFloat('-0.99994', 14)) |
| |
| def test_floatToFixedToStr_precision14(self): |
| self.assertEqual('0.8', floatToFixedToStr(0.7999878, 14)) |
| self.assertEqual('1.0', floatToFixedToStr(1.0, 14)) |
| self.assertEqual('1.0', floatToFixedToStr(1, 14)) |
| self.assertEqual('-1.0', floatToFixedToStr(-1.0, 14)) |
| self.assertEqual('-1.0', floatToFixedToStr(-1, 14)) |
| self.assertEqual('0.0', floatToFixedToStr(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()) |
