| |
|
|
| from pocketsphinx import LogMath |
| import unittest |
|
|
|
|
| class TestLogMath(unittest.TestCase): |
| def assertLogEqual(self, a, b): |
| self.assertTrue(abs(a - b) < 200) |
|
|
| def test_logmath(self): |
| lmath = LogMath() |
| self.assertTrue(lmath is not None) |
| self.assertLogEqual(lmath.log(1e-150), -3454050) |
| self.assertAlmostEqual(lmath.exp(lmath.log(1e-150)), 1e-150) |
| self.assertAlmostEqual(lmath.exp(lmath.log(1e-48)), 1e-48) |
| self.assertLogEqual(lmath.log(42), 37378) |
| self.assertAlmostEqual(lmath.exp(lmath.log(42)), 42, 1) |
| print( |
| "log(1e-3 + 5e-3) = %d + %d = %d\n" |
| % ( |
| lmath.log(1e-3), |
| lmath.log(5e-3), |
| lmath.add(lmath.log(1e-3), lmath.log(5e-3)), |
| ) |
| ) |
| print( |
| "log(1e-3 + 5e-3) = %e + %e = %e\n" |
| % ( |
| lmath.exp(lmath.log(1e-3)), |
| lmath.exp(lmath.log(5e-3)), |
| lmath.exp(lmath.add(lmath.log(1e-3), lmath.log(5e-3))), |
| ) |
| ) |
| self.assertLogEqual( |
| lmath.add(lmath.log(1e-48), lmath.log(5e-48)), lmath.log(6e-48) |
| ) |
| self.assertLogEqual(lmath.add(lmath.log(1e-48), lmath.log(42)), lmath.log(42)) |
|
|
|
|
| if __name__ == "__main__": |
| unittest.main() |
|
|
