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// Copyright (C) 2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package json_test
import (
"bytes"
"reflect"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"git.lukeshu.com/go/lowmemjson/compat/json"
)
func TestCompatHTMLEscape(t *testing.T) {
t.Parallel()
type testcase struct {
In string
Out string
}
testcases := map[string]testcase{
"invalid": {In: `x`, Out: `x`},
"hex-lower": {In: `"\uabcd"`, Out: `"\uabcd"`},
"hex-upper": {In: `"\uABCD"`, Out: `"\uABCD"`},
"hex-mixed": {In: `"\uAbCd"`, Out: `"\uAbCd"`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
t.Logf("in=%q", tc.In)
var dst bytes.Buffer
json.HTMLEscape(&dst, []byte(tc.In))
assert.Equal(t, tc.Out, dst.String())
})
}
}
func TestCompatValid(t *testing.T) {
t.Parallel()
type testcase struct {
In string
Exp bool
}
testcases := map[string]testcase{
"empty": {In: ``, Exp: false},
"num": {In: `1`, Exp: true},
"trunc": {In: `{`, Exp: false},
"object": {In: `{}`, Exp: true},
"non-utf8": {In: "\"\x85\xcd\"", Exp: false}, // https://github.com/golang/go/issues/58517
"hex-lower": {In: `"\uabcd"`, Exp: true},
"hex-upper": {In: `"\uABCD"`, Exp: true},
"hex-mixed": {In: `"\uAbCd"`, Exp: true},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
t.Logf("in=%q", tc.In)
act := json.Valid([]byte(tc.In))
assert.Equal(t, tc.Exp, act)
})
}
}
func TestCompatCompact(t *testing.T) {
t.Parallel()
type testcase struct {
In string
Out string
Err string
}
testcases := map[string]testcase{
"empty": {In: ``, Out: ``, Err: `unexpected end of JSON input`},
"trunc": {In: `{`, Out: ``, Err: `unexpected end of JSON input`},
"object": {In: `{}`, Out: `{}`},
"non-utf8": {In: "\"\x85\xcd\"", Out: "\"\x85\xcd\""},
"float": {In: `1.200e003`, Out: `1.200e003`},
"hex-lower": {In: `"\uabcd"`, Out: `"\uabcd"`},
"hex-upper": {In: `"\uABCD"`, Out: `"\uABCD"`},
"hex-mixed": {In: `"\uAbCd"`, Out: `"\uAbCd"`},
"invalid-utf8": {In: "\x85", Err: `invalid character '\x85' looking for beginning of value`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
t.Logf("in=%q", tc.In)
var out bytes.Buffer
err := json.Compact(&out, []byte(tc.In))
assert.Equal(t, tc.Out, out.String())
if tc.Err == "" {
assert.NoError(t, err)
} else {
assert.EqualError(t, err, tc.Err)
}
})
}
}
func TestCompatIndent(t *testing.T) {
t.Parallel()
type testcase struct {
In string
Out string
Err string
}
testcases := map[string]testcase{
"empty": {In: ``, Out: ``, Err: `unexpected end of JSON input`},
"trunc": {In: `{`, Out: ``, Err: `unexpected end of JSON input`},
"object": {In: `{}`, Out: `{}`},
"non-utf8": {In: "\"\x85\xcd\"", Out: "\"\x85\xcd\""},
"float": {In: `1.200e003`, Out: `1.200e003`},
"tailws0": {In: `0`, Out: `0`},
"tailws1": {In: `0 `, Out: `0 `},
"tailws2": {In: `0 `, Out: `0 `},
"tailws3": {In: "0\n", Out: "0\n"},
"headws1": {In: ` 0`, Out: `0`},
"objws1": {In: `{"a" : 1}`, Out: "{\n>.\"a\": 1\n>}"},
"objws2": {In: "{\"a\"\n:\n1}", Out: "{\n>.\"a\": 1\n>}"},
"hex-lower": {In: `"\uabcd"`, Out: `"\uabcd"`},
"hex-upper": {In: `"\uABCD"`, Out: `"\uABCD"`},
"hex-mixed": {In: `"\uAbCd"`, Out: `"\uAbCd"`},
"invalid-utf8": {In: "\x85", Err: `invalid character '\x85' looking for beginning of value`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
t.Logf("in=%q", tc.In)
var out bytes.Buffer
err := json.Indent(&out, []byte(tc.In), ">", ".")
assert.Equal(t, tc.Out, out.String())
if tc.Err == "" {
assert.NoError(t, err)
} else {
assert.EqualError(t, err, tc.Err)
}
})
}
}
func TestCompatMarshal(t *testing.T) {
t.Parallel()
type testcase struct {
In any
Out string
Err string
}
testcases := map[string]testcase{
"non-utf8": {In: "\x85\xcd", Out: "\"\\ufffd\\ufffd\""},
"urc": {In: "\ufffd", Out: "\"\ufffd\""},
"float": {In: 1.2e3, Out: `1200`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
out, err := json.Marshal(tc.In)
assert.Equal(t, tc.Out, string(out))
if tc.Err == "" {
assert.NoError(t, err)
} else {
assert.EqualError(t, err, tc.Err)
}
})
}
}
func TestCompatUnmarshal(t *testing.T) {
t.Parallel()
type testcase struct {
In string
InPtr any
ExpOut any
ExpErr string
}
testcases := map[string]testcase{
"empty-obj": {In: `{}`, ExpOut: map[string]any{}},
"partial-obj": {In: `{"foo":"bar",`, ExpOut: nil, ExpErr: `unexpected end of JSON input`},
"existing-obj": {In: `{"baz":"quz"}`, InPtr: &map[string]string{"foo": "bar"}, ExpOut: map[string]string{"foo": "bar", "baz": "quz"}},
"existing-obj-partial": {In: `{"baz":"quz"`, InPtr: &map[string]string{"foo": "bar"}, ExpOut: map[string]string{"foo": "bar"}, ExpErr: "unexpected end of JSON input"},
"empty-ary": {In: `[]`, ExpOut: []any{}},
"two-objs": {In: `{} {}`, ExpOut: nil, ExpErr: `invalid character '{' after top-level value`},
"two-numbers1": {In: `00`, ExpOut: nil, ExpErr: `invalid character '0' after top-level value`},
"two-numbers2": {In: `1 2`, ExpOut: nil, ExpErr: `invalid character '2' after top-level value`},
"invalid-utf8": {In: "\x85", ExpErr: `invalid character '\x85' looking for beginning of value`},
// 2e308 is slightly more than math.MaxFloat64 (~1.79e308)
"obj-overflow": {In: `{"foo":"bar", "baz":2e308, "qux": "orb"}`, ExpOut: map[string]any{"foo": "bar", "baz": nil, "qux": "orb"}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
"ary-overflow": {In: `["foo",2e308,"bar",3e308]`, ExpOut: []any{"foo", nil, "bar", nil}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
"existing-overflow": {In: `2e308`, InPtr: func() any { x := 4; return &x }(), ExpOut: 4, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type int`},
// syntax error messages
"syntax-01": {In: `{}x`, ExpErr: `invalid character 'x' after top-level value`},
"syntax-02": {In: `x`, ExpErr: `invalid character 'x' looking for beginning of value`},
"syntax-03": {In: `{x`, ExpErr: `invalid character 'x' looking for beginning of object key string`},
"syntax-04": {In: `{""x`, ExpErr: `invalid character 'x' after object key`},
"syntax-05": {In: `{"":0x`, ExpErr: `invalid character 'x' after object key:value pair`},
"syntax-06": {In: `[0x`, ExpErr: `invalid character 'x' after array element`},
"syntax-07": {In: "\"\x01\"", ExpErr: `invalid character '\x01' in string literal`},
"syntax-08": {In: `"\x`, ExpErr: `invalid character 'x' in string escape code`},
"syntax-09": {In: `"\ux`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
"syntax-10": {In: `"\u0x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
"syntax-11": {In: `"\u00x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
"syntax-12": {In: `"\u000x`, ExpErr: `invalid character 'x' in \u hexadecimal character escape`},
"syntax-13": {In: `-x`, ExpErr: `invalid character 'x' in numeric literal`},
"syntax-14": {In: `0.x`, ExpErr: `invalid character 'x' after decimal point in numeric literal`},
"syntax-15": {In: `1ex`, ExpErr: `invalid character 'x' in exponent of numeric literal`},
"syntax-16": {In: `1e+x`, ExpErr: `invalid character 'x' in exponent of numeric literal`},
"syntax-17": {In: `fx`, ExpErr: `invalid character 'x' in literal false (expecting 'a')`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
ptr := tc.InPtr
if ptr == nil {
var out any
ptr = &out
}
err := json.Unmarshal([]byte(tc.In), ptr)
assert.Equal(t, tc.ExpOut, reflect.ValueOf(ptr).Elem().Interface())
if tc.ExpErr == "" {
assert.NoError(t, err)
} else {
assert.EqualError(t, err, tc.ExpErr)
}
})
}
}
func TestCompatDecode(t *testing.T) {
t.Parallel()
type testcase struct {
In string
InPtr any
ExpOut any
ExpErr string
}
testcases := map[string]testcase{
"empty-obj": {In: `{}`, ExpOut: map[string]any{}},
"partial-obj": {In: `{"foo":"bar",`, ExpOut: nil, ExpErr: `unexpected EOF`},
"existing-obj": {In: `{"baz":"quz"}`, InPtr: &map[string]string{"foo": "bar"}, ExpOut: map[string]string{"foo": "bar", "baz": "quz"}},
"existing-obj-partial": {In: `{"baz":"quz"`, InPtr: &map[string]string{"foo": "bar"}, ExpOut: map[string]string{"foo": "bar"}, ExpErr: "unexpected EOF"},
"empty-ary": {In: `[]`, ExpOut: []any{}},
"two-objs": {In: `{} {}`, ExpOut: map[string]any{}},
"two-numbers1": {In: `00`, ExpOut: float64(0)},
"two-numbers2": {In: `1 2`, ExpOut: float64(1)},
"invalid-utf8": {In: "\x85", ExpErr: `invalid character '\x85' looking for beginning of value`},
// 2e308 is slightly more than math.MaxFloat64 (~1.79e308)
"obj-overflow": {In: `{"foo":"bar", "baz":2e308, "qux": "orb"}`, ExpOut: map[string]any{"foo": "bar", "baz": nil, "qux": "orb"}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
"ary-overflow": {In: `["foo",2e308,"bar",3e308]`, ExpOut: []any{"foo", nil, "bar", nil}, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type float64`},
"existing-overflow": {In: `2e308`, InPtr: func() any { x := 4; return &x }(), ExpOut: 4, ExpErr: `json: cannot unmarshal number 2e308 into Go value of type int`},
}
for tcName, tc := range testcases {
tc := tc
t.Run(tcName, func(t *testing.T) {
t.Parallel()
ptr := tc.InPtr
if ptr == nil {
var out any
ptr = &out
}
err := json.NewDecoder(strings.NewReader(tc.In)).Decode(ptr)
assert.Equal(t, tc.ExpOut, reflect.ValueOf(ptr).Elem().Interface())
if tc.ExpErr == "" {
assert.NoError(t, err)
} else {
assert.EqualError(t, err, tc.ExpErr)
}
})
}
}
|
