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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package json
import (
"regexp"
"testing"
)
func TestNumberIsValid(t *testing.T) {
// From: https://stackoverflow.com/a/13340826
var jsonNumberRegexp = regexp.MustCompile(`^-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?$`)
validTests := []string{
"0",
"-0",
"1",
"-1",
"0.1",
"-0.1",
"1234",
"-1234",
"12.34",
"-12.34",
"12E0",
"12E1",
"12e34",
"12E-0",
"12e+1",
"12e-34",
"-12E0",
"-12E1",
"-12e34",
"-12E-0",
"-12e+1",
"-12e-34",
"1.2E0",
"1.2E1",
"1.2e34",
"1.2E-0",
"1.2e+1",
"1.2e-34",
"-1.2E0",
"-1.2E1",
"-1.2e34",
"-1.2E-0",
"-1.2e+1",
"-1.2e-34",
"0E0",
"0E1",
"0e34",
"0E-0",
"0e+1",
"0e-34",
"-0E0",
"-0E1",
"-0e34",
"-0E-0",
"-0e+1",
"-0e-34",
}
for _, test := range validTests {
if !isValidNumber(test) {
t.Errorf("%s should be valid", test)
}
var f float64
if err := Unmarshal([]byte(test), &f); err != nil {
t.Errorf("%s should be valid but Unmarshal failed: %v", test, err)
}
if !jsonNumberRegexp.MatchString(test) {
t.Errorf("%s should be valid but regexp does not match", test)
}
}
invalidTests := []string{
"",
"invalid",
"1.0.1",
"1..1",
"-1-2",
"012a42",
"01.2",
"012",
"12E12.12",
"1e2e3",
"1e+-2",
"1e--23",
"1e",
"e1",
"1e+",
"1ea",
"1a",
"1.a",
"1.",
"01",
"1.e1",
}
for _, test := range invalidTests {
if isValidNumber(test) {
t.Errorf("%s should be invalid", test)
}
var f float64
if err := Unmarshal([]byte(test), &f); err == nil {
t.Errorf("%s should be invalid but unmarshal wrote %v", test, f)
}
if jsonNumberRegexp.MatchString(test) {
t.Errorf("%s should be invalid but matches regexp", test)
}
}
}
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