import sys
import math
from unittest import TestCase
from simplejson.compat import long_type, text_type
import simplejson as json
from simplejson.decoder import NaN, PosInf, NegInf

class TestFloat(TestCase):
    def test_degenerates_allow(self):
        for inf in (PosInf, NegInf):
            self.assertEqual(json.loads(json.dumps(inf, allow_nan=True), allow_nan=True), inf)
        # Python 2.5 doesn't have math.isnan
        nan = json.loads(json.dumps(NaN, allow_nan=True), allow_nan=True)
        self.assertTrue((0 + nan) != nan)

    def test_degenerates_ignore(self):
        for f in (PosInf, NegInf, NaN):
            self.assertEqual(json.loads(json.dumps(f, ignore_nan=True)), None)

    def test_degenerates_deny(self):
        for f in (PosInf, NegInf, NaN):
            self.assertRaises(ValueError, json.dumps, f, allow_nan=False)
        for s in ('Infinity', '-Infinity', 'NaN'):
            self.assertRaises(ValueError, json.loads, s, allow_nan=False)
            self.assertRaises(ValueError, json.loads, s)

    def test_floats(self):
        for num in [1617161771.7650001, math.pi, math.pi**100,
                    math.pi**-100, 3.1]:
            self.assertEqual(float(json.dumps(num)), num)
            self.assertEqual(json.loads(json.dumps(num)), num)
            self.assertEqual(json.loads(text_type(json.dumps(num))), num)

    def test_ints(self):
        for num in [1, long_type(1), 1<<32, 1<<64]:
            self.assertEqual(json.dumps(num), str(num))
            self.assertEqual(int(json.dumps(num)), num)
            self.assertEqual(json.loads(json.dumps(num)), num)
            self.assertEqual(json.loads(text_type(json.dumps(num))), num)

    def test_float_range(self):
        try:
            float_range = [sys.float_info.min, sys.float_info.max]
        except AttributeError:
            float_range = [2.2250738585072014e-308, 1.7976931348623157e+308]
        self.assertEqual(json.loads(json.dumps(float_range)), float_range)