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Ensure accurate encoding/decoding of big and small floats #4042

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Ensure accurate encoding/decoding of big and small floats #4042

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44 changes: 44 additions & 0 deletions pandas/io/tests/test_json/test_ujson.py
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,30 @@ def test_decimalDecodeTestPrecise(self):
decoded = ujson.decode(encoded, precise_float=True)
self.assertEqual(sut, decoded)

def test_decimalDecodeTestPreciseDoubleBig(self):
sut = {u'a': 4.56e300}
encoded = ujson.encode(sut)
decoded = ujson.decode(encoded, precise_float=True)
self.assertEqual(sut, decoded)

def test_decimalDecodeTestPreciseDoubleSmall(self):
sut = {u'a': 4.56e-300}
encoded = ujson.encode(sut)
decoded = ujson.decode(encoded, precise_float=True)
self.assertEqual(sut, decoded)

def test_decimalDecodeTestPreciseSingleBig(self):
sut = {u'a': 4.56e35}
encoded = ujson.encode(sut)
decoded = ujson.decode(encoded, precise_float=True)
self.assertEqual(sut, decoded)

def test_decimalDecodeTestPreciseSingleSmall(self):
sut = {u'a': 4.56e-35}
encoded = ujson.encode(sut)
decoded = ujson.decode(encoded, precise_float=True)
self.assertEqual(sut, decoded)

def test_encodeDictWithUnicodeKeys(self):
input = { u"key1": u"value1", u"key1": u"value1", u"key1": u"value1", u"key1": u"value1", u"key1": u"value1", u"key1": u"value1" }
output = ujson.encode(input)
Expand Down Expand Up @@ -1416,6 +1440,26 @@ def test_decodeFloatingPointAdditionalTests(self):
self.assertEquals(1.893, ujson.loads("1.893"))
self.assertEquals(1.3, ujson.loads("1.3"))

self.assertEquals(1.1234567893e-300, ujson.loads("1.1234567893e-300"))
self.assertEquals(1.234567893e-300, ujson.loads("1.234567893e-300"))
self.assertEquals(1.34567893e-300, ujson.loads("1.34567893e-300"))
self.assertEquals(1.4567893e-300, ujson.loads("1.4567893e-300"))
self.assertEquals(1.567893e-300, ujson.loads("1.567893e-300"))
self.assertEquals(1.67893e-300, ujson.loads("1.67893e-300"))
self.assertEquals(1.7893e-300, ujson.loads("1.7893e-300"))
self.assertEquals(1.893e-300, ujson.loads("1.893e-300"))
self.assertEquals(1.3e-300, ujson.loads("1.3e-300"))

self.assertEquals(1.1234567893e300, ujson.loads("1.1234567893e300"))
self.assertEquals(1.234567893e300, ujson.loads("1.234567893e300"))
self.assertEquals(1.34567893e300, ujson.loads("1.34567893e300"))
self.assertEquals(1.4567893e300, ujson.loads("1.4567893e300"))
self.assertEquals(1.567893e300, ujson.loads("1.567893e300"))
self.assertEquals(1.67893e300, ujson.loads("1.67893e300"))
self.assertEquals(1.7893e300, ujson.loads("1.7893e300"))
self.assertEquals(1.893e300, ujson.loads("1.893e300"))
self.assertEquals(1.3e300, ujson.loads("1.3e300"))

def test_encodeBigSet(self):
s = set()
for x in xrange(0, 100000):
Expand Down