1// Copyright 2015 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package big
6
7import (
8	"encoding/json"
9	"testing"
10)
11
12var floatVals = []string{
13	"0",
14	"1",
15	"0.1",
16	"2.71828",
17	"1234567890",
18	"3.14e1234",
19	"3.14e-1234",
20	"0.738957395793475734757349579759957975985497e100",
21	"0.73895739579347546656564656573475734957975995797598589749859834759476745986795497e100",
22	"inf",
23	"Inf",
24}
25
26func TestFloatJSONEncoding(t *testing.T) {
27	for _, test := range floatVals {
28		for _, sign := range []string{"", "+", "-"} {
29			for _, prec := range []uint{0, 1, 2, 10, 53, 64, 100, 1000} {
30				x := sign + test
31				var tx Float
32				_, _, err := tx.SetPrec(prec).Parse(x, 0)
33				if err != nil {
34					t.Errorf("parsing of %s (prec = %d) failed (invalid test case): %v", x, prec, err)
35					continue
36				}
37				b, err := json.Marshal(&tx)
38				if err != nil {
39					t.Errorf("marshaling of %v (prec = %d) failed: %v", &tx, prec, err)
40					continue
41				}
42				var rx Float
43				rx.SetPrec(prec)
44				if err := json.Unmarshal(b, &rx); err != nil {
45					t.Errorf("unmarshaling of %v (prec = %d) failed: %v", &tx, prec, err)
46					continue
47				}
48				if rx.Cmp(&tx) != 0 {
49					t.Errorf("JSON encoding of %v (prec = %d) failed: got %v want %v", &tx, prec, &rx, &tx)
50				}
51			}
52		}
53	}
54}
55