package jsonvalue

import "testing"

func TestCanonicalPreservesExactNumbers(t *testing.T) {
	for _, pair := range [][2]string{
		{`{"z":1.0,"a":9007199254740993}`, `{"a":9007199254740993,"z":1}`},
		{`[0,-0,100,0.0001000]`, `[0,0,1e2,1e-4]`},
		{`{"x":12345678901234567890.1234567890123456789}`, `{"x":123456789012345678901234567890123456789e-19}`},
		{`"\ud83d\ude00"`, `"😀"`},
	} {
		got, err := Canonical([]byte(pair[0]))
		if err != nil || string(got) != pair[1] {
			t.Fatalf("%s => %s, %v", pair[0], got, err)
		}
	}
	for _, raw := range []string{`{"a":1,"\u0061":2}`, `{"nested":{"x":1,"x":2}}`, `1 2`, `9e308`, `1e309`, `"\ud800"`, `"\udc00"`, `"\ud800\u1234"`, string([]byte{'"', 0xff, '"'})} {
		if _, err := Canonical([]byte(raw)); err == nil {
			t.Fatalf("accepted %q", raw)
		}
	}
}

func FuzzCanonical(f *testing.F) {
	for _, s := range []string{`{"a":1.0}`, `[1,true,null]`, `"\ud83d\ude00"`, `0.0000000000000000001`} {
		f.Add(s)
	}
	f.Fuzz(func(t *testing.T, s string) {
		b, err := Canonical([]byte(s))
		if err != nil {
			return
		}
		again, err := Canonical(b)
		if err != nil || string(again) != string(b) {
			t.Fatalf("unstable canonical form %s %v", b, err)
		}
	})
}