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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package safejson_test
import (
"encoding/json"
"testing"
"gopkg.in/check.v1"
"github.com/snapcore/snapd/jsonutil/safejson"
)
func Test(t *testing.T) { check.TestingT(t) }
type escapeSuite struct{}
var _ = check.Suite(escapeSuite{})
var table = map[string]string{
"null": "",
`"hello"`: "hello",
`"árbol"`: "árbol",
`"\u0020"`: " ",
`"\uD83D\uDE00"`: "😀",
`"a\b\r\tb"`: "ab",
`"\\\""`: `\"`,
// escape sequences (NOTE just the control char is stripped)
`"\u001b[3mhello\u001b[m"`: "[3mhello[m",
`"a\u0080z"`: "az",
"\"a\u0080z\"": "az",
"\"a\u007fz\"": "az",
"\"a\u009fz\"": "az",
// replacement char
`"a\uFFFDb"`: "ab",
// private unicode chars
`"a\uE000b"`: "ab",
`"a\uDB80\uDC00b"`: "ab",
}
func (escapeSuite) TestStrings(c *check.C) {
var u safejson.String
for j, s := range table {
comm := check.Commentf(j)
c.Assert(json.Unmarshal([]byte(j), &u), check.IsNil, comm)
c.Check(u.Clean(), check.Equals, s, comm)
c.Assert(u.UnmarshalJSON([]byte(j)), check.IsNil, comm)
c.Check(u.Clean(), check.Equals, s, comm)
}
}
func (escapeSuite) TestBadStrings(c *check.C) {
var u1 safejson.String
cc0 := make([][]byte, 0x20)
for i := range cc0 {
cc0[i] = []byte{'"', byte(i), '"'}
}
badesc := make([][]byte, 0, 0x7f-0x21-9)
for c := byte('!'); c <= '~'; c++ {
switch c {
case '"', '\\', '/', 'b', 'f', 'n', 'r', 't', 'u':
continue
default:
badesc = append(badesc, []byte{'"', '\\', c, '"'})
}
}
table := map[string][][]byte{
// these are from json itself (so we're not checking them):
"invalid character '.+' in string literal": cc0,
"invalid character '.+' in string escape code": badesc,
`invalid character '.+' in \\u .*`: {[]byte(`"\u02"`), []byte(`"\u02zz"`)},
"invalid character '\"' after top-level value": {[]byte(`"""`)},
"unexpected end of JSON input": {[]byte(`"\"`)},
}
for e, js := range table {
for _, j := range js {
comm := check.Commentf("%q", j)
c.Check(json.Unmarshal(j, &u1), check.ErrorMatches, e, comm)
}
}
table = map[string][][]byte{
// these are from our lib
`missing string delimiters.*`: {{}, {'"'}},
`unexpected control character at 0 in "\\.+"`: cc0,
`unknown escape '.' at 1 of "\\."`: badesc,
`badly formed \\u escape.*`: {
[]byte(`"\u02"`), []byte(`"\u02zz"`), []byte(`"a\u02xxz"`),
[]byte(`"\uD83Da"`), []byte(`"\uD83Da\u20"`), []byte(`"\uD83Da\u20zzz"`),
},
`unexpected unescaped quote at 0 in """`: {[]byte(`"""`)},
`unexpected end of string \(trailing backslash\).*`: {[]byte(`"\"`)},
}
for e, js := range table {
for _, j := range js {
comm := check.Commentf("%q", j)
c.Check(u1.UnmarshalJSON(j), check.ErrorMatches, e, comm)
}
}
}
func (escapeSuite) TestParagraph(c *check.C) {
var u safejson.Paragraph
for j1, v1 := range table {
for j2, v2 := range table {
if j2 == "null" && j1 != "null" {
continue
}
var j, s string
if j1 == "null" {
j = j2
s = v2
} else {
j = j1[:len(j1)-1] + "\\n" + j2[1:]
s = v1 + "\n" + v2
}
comm := check.Commentf(j)
c.Assert(json.Unmarshal([]byte(j), &u), check.IsNil, comm)
c.Check(u.Clean(), check.Equals, s, comm)
}
}
}
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