github.com/grumpyhome/grumpy@v0.3.1-0.20201208125205-7b775405bdf1/grumpy-runtime-src/third_party/stdlib/test/test_fpformat.py (about) 1 ''' 2 Tests for fpformat module 3 Nick Mathewson 4 ''' 5 from test.test_support import run_unittest #, import_module 6 import unittest 7 # fpformat = import_module('fpformat', deprecated=True) 8 import fpformat 9 fix, sci, NotANumber = fpformat.fix, fpformat.sci, fpformat.NotANumber 10 11 StringType = type('') 12 13 # Test the old and obsolescent fpformat module. 14 # 15 # (It's obsolescent because fix(n,d) == "%.*f"%(d,n) and 16 # sci(n,d) == "%.*e"%(d,n) 17 # for all reasonable numeric n and d, except that sci gives 3 exponent 18 # digits instead of 2. 19 # 20 # Differences only occur for unreasonable n and d. <.2 wink>) 21 22 class FpformatTest(unittest.TestCase): 23 24 def checkFix(self, n, digits): 25 result = fix(n, digits) 26 if isinstance(n, StringType): 27 n = repr(n) 28 expected = "%.*f" % (digits, float(n)) 29 30 self.assertEqual(result, expected) 31 32 def checkSci(self, n, digits): 33 result = sci(n, digits) 34 if isinstance(n, StringType): 35 n = repr(n) 36 expected = "%.*e" % (digits, float(n)) 37 # add the extra 0 if needed 38 num, exp = expected.split("e") 39 if len(exp) < 4: 40 exp = exp[0] + "0" + exp[1:] 41 expected = "%se%s" % (num, exp) 42 43 self.assertEqual(result, expected) 44 45 def test_basic_cases(self): 46 self.assertEqual(fix(100.0/3, 3), '33.333') 47 self.assertEqual(sci(100.0/3, 3), '3.333e+001') 48 49 @unittest.skip('grumpy') 50 def test_reasonable_values(self): 51 for d in range(7): 52 for val in (1000.0/3, 1000, 1000.0, .002, 1.0/3, 1e10): 53 for realVal in (val, 1.0/val, -val, -1.0/val): 54 self.checkFix(realVal, d) 55 self.checkSci(realVal, d) 56 57 def test_failing_values(self): 58 # Now for 'unreasonable n and d' 59 self.assertEqual(fix(1.0, 1000), '1.'+('0'*1000)) 60 self.assertEqual(sci("1"+('0'*1000), 0), '1e+1000') 61 62 # This behavior is inconsistent. sci raises an exception; fix doesn't. 63 yacht = "Throatwobbler Mangrove" 64 self.assertEqual(fix(yacht, 10), yacht) 65 try: 66 sci(yacht, 10) 67 except NotANumber: 68 pass 69 else: 70 self.fail("No exception on non-numeric sci") 71 72 73 def test_main(): 74 run_unittest(FpformatTest) 75 76 77 if __name__ == "__main__": 78 test_main()