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jscandec_test.go
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jscandec_test.go
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package jscandec_test
import (
_ "embed"
"encoding/json"
"errors"
"fmt"
"math"
"reflect"
"runtime"
"strconv"
"strings"
"testing"
"unsafe"
jscandec "github.com/romshark/jscan-experimental-decoder"
jsoniter "github.com/json-iterator/go"
"github.com/romshark/jscan/v2"
"github.com/stretchr/testify/require"
)
//go:embed testdata/array_2d_bool_6m.json
var array2DBool6M string
//go:embed testdata/array_str_1024_639k.json
var arrayStr1024 string
//go:embed testdata/array_dec_1024_10k.json
var arrayFloat1024 string
type DecoderIface[S []byte | string, T any] interface {
Decode(S, *T, *jscandec.DecodeOptions) (errIndex int, err error)
}
type testSetup[T any] struct {
decodeOptions *jscandec.DecodeOptions
decoderString DecoderIface[string, T]
decoderBytes DecoderIface[[]byte, T]
}
func newTestSetup[T any](
t *testing.T, decodeOptions jscandec.DecodeOptions,
) testSetup[T] {
tokenizerString := jscan.NewTokenizer[string](16, 1024)
dStr, err := jscandec.NewDecoder[string, T](
tokenizerString, jscandec.DefaultInitOptions,
)
require.NoError(t, err)
tokenizerBytes := jscan.NewTokenizer[[]byte](16, 1024)
dBytes, err := jscandec.NewDecoder[[]byte, T](
tokenizerBytes, jscandec.DefaultInitOptions,
)
require.NoError(t, err)
return testSetup[T]{
decodeOptions: &decodeOptions,
decoderString: dStr,
decoderBytes: dBytes,
}
}
// TestOK makes sure that input can be decoded to T successfully,
// equals expect (if any) and yields the same results as encoding/json.Unmarshal.
// expect is optional.
func (s testSetup[T]) TestOK(t *testing.T, name, input string, expect ...T) {
t.Helper()
s.TestOKPrepare(t, name, input, Test[T]{})
}
type Test[T any] struct {
// OptionsJscanInit is jscandec.DefaultInitOptions by default
OptionsJscanInit *jscandec.InitOptions
// OptionsJscanDecode is jscandec.DefaultOptions by default
OptionsJscanDecode *jscandec.DecodeOptions
// PrepareJscan is optional and produces the value passed to
// `jscandec.(*Decoder).Decode`.
PrepareJscan func() T
// PrepareEncodingjson is optional and produces the value passed to
// `encoding/json.(*Decoder).Decode` if not nil, otherwise the value of PrepareJscan
// is used if PrepareEncodingjson == nil and PrepareJscan != nil.
// If borh are nil, then the value passed will be a pointer to the zero value of T.
PrepareEncodingjson func() any
// Expect is optional. If Expect != nil then the jscan result is compared against it.
Expect any
// Check is optional and used to check the result of jscandec and compare its
// result with the result of encoding/json. If Check is nil, then
// vJscan and vEncodingJson are compared directly.
Check func(t *testing.T, vJscan T, vEncodingJson any)
}
// TestOKPrepare is similar to TestOK but invokes prepareJscan on input variables
// before unmarshalling. If
func (s testSetup[T]) TestOKPrepare(t *testing.T, name, input string, test Test[T]) {
t.Helper()
check := func(t *testing.T, resultEncodingjson any, resultJscan *T) {
t.Helper()
{
// Make sure that the result data for jscan and encoding/json
// resides at different addresses because otherwise the comparison
// could yield false positive results. The only exception are types
// of size zero, such as empty struct and its derivatives.
type emptyIface struct{ _, Data unsafe.Pointer }
if (*emptyIface)(unsafe.Pointer(&resultEncodingjson)).Data == unsafe.Pointer(resultJscan) &&
reflect.TypeOf(resultJscan).Elem().Size() != 0 {
t.Fatal("the encoding/json and jscan variables " +
"must reside at different addresses")
}
}
// Make sure GC is happy
runtime.GC()
runtime.GC()
if test.Expect != nil {
require.Equal(t, test.Expect, *resultJscan, "unexpected jscan result")
}
if test.Check == nil {
require.Equal(t, resultEncodingjson, resultJscan,
"deviation between encoding/json and jscan results")
} else {
test.Check(t, *resultJscan, resultEncodingjson)
}
}
prepare := func() (vJscan T, vEncodingJson any) {
if test.PrepareJscan != nil {
vJscan = test.PrepareJscan()
}
if test.PrepareEncodingjson != nil {
vEncodingJson = test.PrepareEncodingjson()
} else if test.PrepareJscan != nil {
v := test.PrepareJscan()
vEncodingJson = &v
} else {
vEncodingJson = &vJscan
}
return vJscan, vEncodingJson
}
t.Run(name+"/bytes", func(t *testing.T) {
t.Helper()
vJscan, vEncodingJson := prepare()
dEncodingJson := json.NewDecoder(strings.NewReader(input))
if s.decodeOptions.DisallowUnknownFields {
dEncodingJson.DisallowUnknownFields()
}
require.NoError(t, dEncodingJson.Decode(vEncodingJson), "error in encoding/json")
errIndex, err := s.decoderBytes.Decode([]byte(input), &vJscan, s.decodeOptions)
if err != nil {
t.Fatal(fmt.Errorf("ERR at %d: %s", errIndex, err.Error()))
}
check(t, vEncodingJson, &vJscan)
})
t.Run(name+"/string", func(t *testing.T) {
t.Helper()
vJscan, vEncodingJson := prepare()
dEncodingJson := json.NewDecoder(strings.NewReader(input))
if s.decodeOptions.DisallowUnknownFields {
dEncodingJson.DisallowUnknownFields()
}
require.NoError(t, dEncodingJson.Decode(vEncodingJson), "error in encoding/json")
errIndex, err := s.decoderString.Decode(input, &vJscan, s.decodeOptions)
if err != nil {
t.Fatal(fmt.Errorf("ERR at %d: %s", errIndex, err.Error()))
}
check(t, vEncodingJson, &vJscan)
})
}
// testErr makes sure that input fails to parse for both jscan and encoding/json
// and that the returned error equals expect.
func (s testSetup[T]) testErr(
t *testing.T, name, input string, expectIndex int, expect error,
) {
t.Helper()
s.testErrCheck(t, name, input, func(t *testing.T, errIndex int, err error) {
t.Helper()
require.Equal(t, expect, err)
require.Equal(t, expectIndex, errIndex)
})
}
// testErrCheck makes sure that input fails to parse for both jscan and encoding/json
// and calls check with the error returned.
func (s testSetup[T]) testErrCheck(
t *testing.T, name, input string,
check func(t *testing.T, errIndex int, err error),
) {
t.Helper()
t.Run(name+"/bytes", func(t *testing.T) {
t.Helper()
var std, v T
stdDec := json.NewDecoder(strings.NewReader(input))
if s.decodeOptions.DisallowUnknownFields {
stdDec.DisallowUnknownFields()
}
require.Error(t, stdDec.Decode(&std), "no error in encoding/json")
errIndex, err := s.decoderBytes.Decode([]byte(input), &v, s.decodeOptions)
check(t, errIndex, err)
runtime.GC() // Make sure GC is happy
})
t.Run(name+"/string", func(t *testing.T) {
t.Helper()
var std, v T
stdDec := json.NewDecoder(strings.NewReader(input))
if s.decodeOptions.DisallowUnknownFields {
stdDec.DisallowUnknownFields()
}
require.Error(t, stdDec.Decode(&std), "no error in encoding/json")
errIndex, err := s.decoderString.Decode(input, &v, s.decodeOptions)
check(t, errIndex, err)
runtime.GC() // Make sure GC is happy
})
}
func TestDecodeNil(t *testing.T) {
tokenizer := jscan.NewTokenizer[string](64, 1024)
d, err := jscandec.NewDecoder[string, [][]bool](
tokenizer, jscandec.DefaultInitOptions,
)
require.NoError(t, err)
errIndex, err := d.Decode(`"foo"`, nil, jscandec.DefaultOptions)
require.Error(t, err)
require.Equal(t, jscandec.ErrNilDest, err)
require.Equal(t, 0, errIndex)
}
func TestDecodeBool(t *testing.T) {
s := newTestSetup[bool](t, *jscandec.DefaultOptions)
s.TestOK(t, "true", `true`, true)
s.TestOK(t, "false", `false`, false)
s.TestOK(t, "null", `null`, false)
s.testErr(t, "int", `1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeAny(t *testing.T) {
s := newTestSetup[any](t, *jscandec.DefaultOptions)
s.TestOK(t, "int_0", `0`, float64(0))
s.TestOK(t, "int_42", `42`, float64(42))
s.TestOK(t, "number", `3.1415`, float64(3.1415))
s.TestOK(t, "true", `true`, true)
s.TestOK(t, "false", `false`, false)
s.TestOK(t, "string", `"string"`, "string")
s.TestOK(t, "string_escaped", `"\"\u30C4\""`, `"ツ"`)
s.TestOK(t, "null", `null`, nil)
s.TestOK(t, "array_empty", `[]`, []any{})
s.TestOK(t, "array_int", `[0,1,2]`, []any{float64(0), float64(1), float64(2)})
s.TestOK(t, "array_string", `["a", "b", "\t"]`, []any{"a", "b", "\t"})
s.TestOK(t, "array_bool", `[true, false]`, []any{true, false})
s.TestOK(t, "array_null", `[null, null, null]`, []any{nil, nil, nil})
s.TestOK(t, "object_empty", `{}`, map[string]any{})
s.TestOK(t, "array_mix", `[null, false, 42, "x", {}, true]`,
[]any{nil, false, float64(42), "x", map[string]any{}, true})
s.TestOK(t, "object_multi", `{
"num": 42,
"str": "\"text\u30C4\u044B\"",
"bool_true": true,
"bool_false": false,
"array_empty": [],
"array_mix": [null, false, 42, "\/\r\n", {}, true],
"null": null
}`, map[string]any{
"num": float64(42),
"str": `"textツы"`,
"bool_true": true,
"bool_false": false,
"array_empty": []any{},
"array_mix": []any{nil, false, float64(42), "/\r\n", map[string]any{}, true},
"null": nil,
})
s.TestOKPrepare(t, "overwrite_int->bool", `true`, Test[any]{
PrepareJscan: func() any { return int(42) },
Expect: true,
})
s.TestOKPrepare(t, "overwrite_bool->float64", `42`, Test[any]{
PrepareJscan: func() any { return true },
Expect: float64(42),
})
{
type S struct {
ID int
Name string
}
s.TestOKPrepare(t, "overwrite_S->map", `{"id":42,"name":"John"}`, Test[any]{
PrepareJscan: func() any { return S{ID: 1, Name: "Alice"} },
Expect: map[string]any{"id": float64(42), "name": "John"},
})
s.TestOKPrepare(t, "overwrite_slice", `42`, Test[any]{
PrepareJscan: func() any {
return []S{
{ID: 1, Name: "Alice"}, {ID: 2, Name: "Bob"},
}
},
Expect: float64(42),
})
s.TestOKPrepare(t, "overwrite_sliceS->map", `[{"name":"John"}]`, Test[any]{
PrepareJscan: func() any {
return []S{{ID: 1, Name: "Alice"}, {ID: 2, Name: "Bob"}}
},
Expect: []any{map[string]any{"name": "John"}},
})
s.TestOKPrepare(t, "no_overwrite_null", `null`, Test[any]{
PrepareJscan: func() any {
return []S{{ID: 1, Name: "Alice"}, {ID: 2, Name: "Bob"}}
},
// Check explicitly for any(nil) because otherwise
// Test.Expect will be ignored.
Check: func(t *testing.T, vJscan, vEncodingJson any) {
require.Nil(t, vJscan)
require.Equal(t, any(nil), *vEncodingJson.(*any))
},
})
}
s.testErrCheck(t, "float_range_hi", `1e309`,
func(t *testing.T, errIndex int, err error) {
require.ErrorIs(t, err, strconv.ErrRange)
require.Equal(t, 0, errIndex)
})
}
func TestDecodeUint(t *testing.T) {
skipIfNot64bitSystem(t)
s := newTestSetup[uint](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "int32_max", `2147483647`, math.MaxInt32)
s.TestOK(t, "int64_max", `18446744073709551615`, math.MaxUint64)
s.testErr(t, "overflow_hi", `18446744073709551616`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_l21", `111111111111111111111`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "negative", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "-1", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "float", `0.1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "exponent", `1e2`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeInt(t *testing.T) {
skipIfNot64bitSystem(t)
s := newTestSetup[int](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "int32_min", `-2147483648`, math.MinInt32)
s.TestOK(t, "int32_max", `2147483647`, math.MaxInt32)
s.TestOK(t, "int64_min", `-9223372036854775808`, math.MinInt64)
s.TestOK(t, "int64_max", `9223372036854775807`, math.MaxInt64)
s.testErr(t, "overflow_hi", `9223372036854775808`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `-9223372036854775809`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
// s.testErr(t, "null", `null`, 0, jscandec.ErrUnexpectedValue)
// s.testErr(t, "float", `0.1`, 0, jscandec.ErrUnexpectedValue)
// s.testErr(t, "exponent", `1e2`, 0, ErrUnexpectedValue, Inde)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeFloat32(t *testing.T) {
s := newTestSetup[float32](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "min_int", `-16777215`, -16_777_215)
s.TestOK(t, "max_int", `16777215`, 16_777_215)
s.TestOK(t, "pi7", `3.1415927`, 3.1415927)
s.TestOK(t, "-pi7", `-3.1415927`, -3.1415927)
s.TestOK(t, "3.4028235e38", `3.4028235e38`, 3.4028235e38)
s.TestOK(t, "min_pos", `1.4e-45`, 1.4e-45)
s.TestOK(t, "3.4e38", `3.4e38`, 3.4e38)
s.TestOK(t, "-3.4e38", `-3.4e38`, -3.4e38)
s.TestOK(t, "avogadros_num", `6.022e23`, 6.022e23)
s.testErrCheck(t, "range_hi", `3.5e38`,
func(t *testing.T, errIndex int, err error) {
require.ErrorIs(t, err, strconv.ErrRange)
require.Equal(t, 0, errIndex)
})
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeFloat64(t *testing.T) {
s := newTestSetup[float64](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "1.0", `1.0`, 1)
s.TestOK(t, "1.000000003", `1.000000003`, 1.000000003)
s.TestOK(t, "max_int", `9007199254740991`, 9_007_199_254_740_991)
s.TestOK(t, "min_int", `-9007199254740991`, -9_007_199_254_740_991)
s.TestOK(t, "pi",
`3.141592653589793238462643383279502884197`,
3.141592653589793238462643383279502884197)
s.TestOK(t, "pi_neg",
`-3.141592653589793238462643383279502884197`,
-3.141592653589793238462643383279502884197)
s.TestOK(t, "3.4028235e38", `3.4028235e38`, 3.4028235e38)
s.TestOK(t, "exponent", `1.7976931348623157e308`, 1.7976931348623157e308)
s.TestOK(t, "neg_exponent", `1.7976931348623157e-308`, 1.7976931348623157e-308)
s.TestOK(t, "1.4e-45", `1.4e-45`, 1.4e-45)
s.TestOK(t, "neg_exponent", `-1.7976931348623157e308`, -1.7976931348623157e308)
s.TestOK(t, "3.4e38", `3.4e38`, 3.4e38)
s.TestOK(t, "-3.4e38", `-3.4e38`, -3.4e38)
s.TestOK(t, "avogadros_num", `6.022e23`, 6.022e23)
s.testErrCheck(t, "range_hi", `1e309`,
func(t *testing.T, errIndex int, err error) {
require.ErrorIs(t, err, strconv.ErrRange)
require.Equal(t, 0, errIndex)
})
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeUint64(t *testing.T) {
s := newTestSetup[uint64](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "int32_max", `2147483647`, math.MaxInt32)
s.TestOK(t, "uint32_max", `4294967295`, math.MaxUint32)
s.TestOK(t, "max", `18446744073709551615`, math.MaxUint64)
s.testErr(t, "overflow_hi", `18446744073709551616`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_hi2", `19000000000000000000`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_l21", `111111111111111111111`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "negative", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeInt64(t *testing.T) {
s := newTestSetup[int64](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "int32_min", `-2147483648`, math.MinInt32)
s.TestOK(t, "int32_max", `2147483647`, math.MaxInt32)
s.TestOK(t, "min", `-9223372036854775808`, math.MinInt64)
s.TestOK(t, "max", `9223372036854775807`, math.MaxInt64)
s.testErr(t, "overflow_hi", `9223372036854775808`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `-9223372036854775809`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeUint32(t *testing.T) {
s := newTestSetup[uint32](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "max", `4294967295`, math.MaxUint32)
s.testErr(t, "overflow_hi", `4294967296`,
0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_hi2", `5000000000`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_l11", `11111111111`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "negative", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeInt32(t *testing.T) {
s := newTestSetup[int32](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "min", `-2147483648`, math.MinInt32)
s.TestOK(t, "max", `2147483647`, math.MaxInt32)
s.testErr(t, "overflow_hi", `2147483648`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `-2147483649`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeUint16(t *testing.T) {
s := newTestSetup[uint16](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "max", `65535`, math.MaxUint16)
s.testErr(t, "overflow_hi", `65536`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_hi2", `70000`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_l6", `111111`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "negative", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeInt16(t *testing.T) {
s := newTestSetup[int16](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "min", `-32768`, math.MinInt16)
s.TestOK(t, "max", `32767`, math.MaxInt16)
s.testErr(t, "overflow_hi", `32768`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `-32769`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeUint8(t *testing.T) {
s := newTestSetup[uint8](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "max", `255`, math.MaxUint8)
s.testErr(t, "overflow_hi", `256`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_hi2", `300`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_l4", `1111`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "negative", `-1`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeInt8(t *testing.T) {
s := newTestSetup[int8](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, 0)
s.TestOK(t, "0", `0`, 0)
s.TestOK(t, "1", `1`, 1)
s.TestOK(t, "-1", `-1`, -1)
s.TestOK(t, "min", `-128`, math.MinInt8)
s.TestOK(t, "max", `127`, math.MaxInt8)
s.testErr(t, "overflow_hi", `128`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `-129`, 0, jscandec.ErrIntegerOverflow)
s.testErr(t, "string", `"text"`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "true", `true`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "false", `false`, 0, jscandec.ErrUnexpectedValue)
s.testErr(t, "array", `[]`, 0, jscandec.ErrUnexpectedValue)
}
func TestDecodeNull(t *testing.T) {
// Primitive types
newTestSetup[string](t, *jscandec.DefaultOptions).TestOK(t, "string", `null`, "")
newTestSetup[bool](t, *jscandec.DefaultOptions).TestOK(t, "bool", `null`, false)
newTestSetup[int](t, *jscandec.DefaultOptions).TestOK(t, "int", `null`, 0)
newTestSetup[int8](t, *jscandec.DefaultOptions).TestOK(t, "int8", `null`, 0)
newTestSetup[int16](t, *jscandec.DefaultOptions).TestOK(t, "int16", `null`, 0)
newTestSetup[int32](t, *jscandec.DefaultOptions).TestOK(t, "int32", `null`, 0)
newTestSetup[int64](t, *jscandec.DefaultOptions).TestOK(t, "int64", `null`, 0)
newTestSetup[uint](t, *jscandec.DefaultOptions).TestOK(t, "uint", `null`, 0)
newTestSetup[uint8](t, *jscandec.DefaultOptions).TestOK(t, "uint8", `null`, 0)
newTestSetup[uint16](t, *jscandec.DefaultOptions).TestOK(t, "uint16", `null`, 0)
newTestSetup[uint32](t, *jscandec.DefaultOptions).TestOK(t, "uint32", `null`, 0)
newTestSetup[uint64](t, *jscandec.DefaultOptions).TestOK(t, "uint64", `null`, 0)
newTestSetup[float32](t, *jscandec.DefaultOptions).TestOK(t, "float32", `null`, 0)
newTestSetup[float64](t, *jscandec.DefaultOptions).TestOK(t, "float64", `null`, 0)
// Slices
newTestSetup[[]bool](t, *jscandec.DefaultOptions).
TestOK(t, "slice_bool", `null`, nil)
newTestSetup[[]string](t, *jscandec.DefaultOptions).
TestOK(t, "slice_string", `null`, nil)
// Primitives in array
newTestSetup[[]bool](t, *jscandec.DefaultOptions).
TestOK(t, "array_bool", `[null]`, []bool{false})
newTestSetup[[]string](t, *jscandec.DefaultOptions).
TestOK(t, "array_string", `[null]`, []string{""})
newTestSetup[[]int](t, *jscandec.DefaultOptions).
TestOK(t, "array_int", `[null]`, []int{0})
newTestSetup[[]int8](t, *jscandec.DefaultOptions).
TestOK(t, "array_int8", `[null]`, []int8{0})
newTestSetup[[]int16](t, *jscandec.DefaultOptions).
TestOK(t, "array_int16", `[null]`, []int16{0})
newTestSetup[[]int32](t, *jscandec.DefaultOptions).
TestOK(t, "array_int32", `[null]`, []int32{0})
newTestSetup[[]int64](t, *jscandec.DefaultOptions).
TestOK(t, "array_int64", `[null]`, []int64{0})
newTestSetup[[]uint](t, *jscandec.DefaultOptions).
TestOK(t, "array_int", `[null]`, []uint{0})
newTestSetup[[]uint8](t, *jscandec.DefaultOptions).
TestOK(t, "array_int8", `[null]`, []uint8{0})
newTestSetup[[]uint16](t, *jscandec.DefaultOptions).
TestOK(t, "array_int16", `[null]`, []uint16{0})
newTestSetup[[]uint32](t, *jscandec.DefaultOptions).
TestOK(t, "array_int32", `[null]`, []uint32{0})
newTestSetup[[]uint64](t, *jscandec.DefaultOptions).
TestOK(t, "array_int64", `[null]`, []uint64{0})
newTestSetup[[]float32](t, *jscandec.DefaultOptions).
TestOK(t, "array_float32", `[null]`, []float32{0})
newTestSetup[[]float64](t, *jscandec.DefaultOptions).
TestOK(t, "array_float64", `[null]`, []float64{0})
}
func TestDecodeString(t *testing.T) {
s := newTestSetup[string](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, "")
s.TestOK(t, "empty", `""`, "")
s.TestOK(t, "spaces", `" "`, " ")
s.TestOK(t, "hello_world", `"Hello World!"`, "Hello World!")
s.TestOK(t, "unicode", `"юникод-жеж"`, "юникод-жеж")
s.TestOK(t, "escaped", `"\"\\\""`, `"\"`)
s.TestOK(t, "escaped_unicode", `"\u0436\u0448\u0444\u30C4"`, `жшфツ`)
}
func TestDecode2DSliceBool(t *testing.T) {
type T = [][]bool
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "3_2", `[[true],[false, true],[ ]]`, T{{true}, {false, true}, {}})
s.TestOK(t, "2_1", `[[],[false]]`, T{{}, {false}})
s.TestOK(t, "2_0", `[[],[]]`, T{{}, {}})
s.TestOK(t, "1", `[]`, T{})
s.TestOK(t, "array_2d_bool_6m", array2DBool6M)
}
func TestDecodeSliceInt(t *testing.T) {
skipIfNot64bitSystem(t)
type T = []int
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, -23, 456 ]`, T{1, -23, 456})
s.TestOK(t, "max_int", `[9223372036854775807]`, T{math.MaxInt})
s.TestOK(t, "min_int", `[-9223372036854775808]`, T{math.MinInt})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int { return []int{10, 20, 30} },
Expect: []int{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int { return []int(nil) },
Expect: []int{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int { return []int{10, 20} },
Expect: []int{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int { return []int{10, 20, 30, 40} },
Expect: []int{1, 2, 3},
})
s.testErr(t, "overflow_hi", `[9223372036854775808]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `[-9223372036854775809]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceInt8(t *testing.T) {
type T = []int8
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, -23, 123 ]`, T{1, -23, 123})
s.TestOK(t, "max_int8", `[127]`, T{math.MaxInt8})
s.TestOK(t, "min_int8", `[-128]`, T{math.MinInt8})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int8 { return []int8{10, 20, 30} },
Expect: []int8{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int8 { return []int8(nil) },
Expect: []int8{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int8 { return []int8{10, 20} },
Expect: []int8{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int8 { return []int8{10, 20, 30, 40} },
Expect: []int8{1, 2, 3},
})
s.testErr(t, "overflow_hi", `[128]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `[-129]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceInt16(t *testing.T) {
type T = []int16
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, -23, 123 ]`, T{1, -23, 123})
s.TestOK(t, "max_int16", `[32767]`, T{math.MaxInt16})
s.TestOK(t, "min_int16", `[-32768]`, T{math.MinInt16})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int16 { return []int16{10, 20, 30} },
Expect: []int16{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int16 { return []int16(nil) },
Expect: []int16{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int16 { return []int16{10, 20} },
Expect: []int16{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int16 { return []int16{10, 20, 30, 40} },
Expect: []int16{1, 2, 3},
})
s.testErr(t, "overflow_hi", `[32768]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `[-32769]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceInt32(t *testing.T) {
type T = []int32
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, -23, 123 ]`, T{1, -23, 123})
s.TestOK(t, "max_int32", `[2147483647]`, T{math.MaxInt32})
s.TestOK(t, "min_int32", `[-2147483648]`, T{math.MinInt32})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int32 { return []int32{10, 20, 30} },
Expect: []int32{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int32 { return []int32(nil) },
Expect: []int32{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int32 { return []int32{10, 20} },
Expect: []int32{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int32 { return []int32{10, 20, 30, 40} },
Expect: []int32{1, 2, 3},
})
s.testErr(t, "overflow_hi", `[2147483648]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `[-2147483649]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceInt64(t *testing.T) {
type T = []int64
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, -23, 123 ]`, T{1, -23, 123})
s.TestOK(t, "max_int64", `[9223372036854775807]`, T{math.MaxInt64})
s.TestOK(t, "min_int64", `[-9223372036854775808]`, T{math.MinInt64})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int64 { return []int64{10, 20, 30} },
Expect: []int64{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int64 { return []int64(nil) },
Expect: []int64{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int64 { return []int64{10, 20} },
Expect: []int64{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []int64 { return []int64{10, 20, 30, 40} },
Expect: []int64{1, 2, 3},
})
s.testErr(t, "overflow_hi", `[9223372036854775808]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "overflow_lo", `[-9223372036854775809]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceUint(t *testing.T) {
skipIfNot64bitSystem(t)
type T = []uint
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, 23, 456 ]`, T{1, 23, 456})
s.TestOK(t, "max_uint", `[18446744073709551615]`, T{math.MaxUint})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint { return []uint{10, 20, 30} },
Expect: []uint{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint { return []uint(nil) },
Expect: []uint{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint { return []uint{10, 20} },
Expect: []uint{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint { return []uint{10, 20, 30, 40} },
Expect: []uint{1, 2, 3},
})
s.testErr(t, "negative", `[-1]`,
1, jscandec.ErrUnexpectedValue)
s.testErr(t, "overflow_hi", `[18446744073709551616]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceUint8(t *testing.T) {
skipIfNot64bitSystem(t)
type T = []uint8
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, 23, 123 ]`, T{1, 23, 123})
s.TestOK(t, "max_uint", `[255]`, T{math.MaxUint8})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint8 { return []uint8{10, 20, 30} },
Expect: []uint8{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint8 { return []uint8(nil) },
Expect: []uint8{1, 2, 3},
})
s.TestOKPrepare(t, "var_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint8 { return []uint8{10, 20} },
Expect: []uint8{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint8 { return []uint8{10, 20, 30, 40} },
Expect: []uint8{1, 2, 3},
})
s.testErr(t, "negative", `[-1]`,
1, jscandec.ErrUnexpectedValue)
s.testErr(t, "overflow_hi", `[256]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)
}
func TestDecodeSliceUint16(t *testing.T) {
skipIfNot64bitSystem(t)
type T = []uint16
s := newTestSetup[T](t, *jscandec.DefaultOptions)
s.TestOK(t, "three_items", `[ 1, 23, 123 ]`, T{1, 23, 123})
s.TestOK(t, "max_uint", `[65535]`, T{math.MaxUint16})
s.TestOK(t, "one_item", `[ 1 ]`, T{1})
s.TestOK(t, "empty", `[]`, T{})
s.TestOK(t, "null", `null`, T(nil))
s.TestOK(t, "null_element", `[ null ]`, T{0})
s.TestOK(t, "null_element_multi", `[ null, 1, null ]`, T{0, 1, 0})
s.TestOKPrepare(t, "var_overwrite", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint16 { return []uint16{10, 20, 30} },
Expect: []uint16{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint16 { return []uint16(nil) },
Expect: []uint16{1, 2, 3},
})
s.TestOKPrepare(t, "var_nil_realloc", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint16 { return []uint16{10, 20} },
Expect: []uint16{1, 2, 3},
})
s.TestOKPrepare(t, "var_shrink", `[1,2,3]`, Test[T]{
PrepareJscan: func() []uint16 { return []uint16{10, 20, 30, 40} },
Expect: []uint16{1, 2, 3},
})
s.testErr(t, "negative", `[-1]`,
1, jscandec.ErrUnexpectedValue)
s.testErr(t, "overflow_hi", `[65536]`,
1, jscandec.ErrIntegerOverflow)
s.testErr(t, "wrong_type_object", `{}`,
0, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_float", `[1,3.14]`,
3, jscandec.ErrUnexpectedValue)
s.testErr(t, "wrong_type_element_string", `[1,"nope"]`,
3, jscandec.ErrUnexpectedValue)