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// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package lowmemjson
import (
"bytes"
"io"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
func TestDecodeNumber(t *testing.T) {
t.Parallel()
r := strings.NewReader(`1{}`)
var num int
assert.NoError(t, NewDecoder(r).Decode(&num))
assert.Equal(t, 1, num)
assert.Equal(t, 2, r.Len()) // check that it didn't read too far
}
func TestDecodeObject(t *testing.T) {
t.Parallel()
err := DecodeObject(strings.NewReader(`{"foo":9}`),
func(r io.RuneScanner) error {
return nil
},
func(r io.RuneScanner) error {
var n int
return NewDecoder(r).Decode(&n)
})
assert.ErrorContains(t, err, "did not consume entire")
}
func TestDecodeGrowing(t *testing.T) {
t.Parallel()
var buf bytes.Buffer
dec := NewDecoder(&buf)
var x any
assert.ErrorIs(t, dec.Decode(&x), io.EOF)
buf.WriteString("1\n")
assert.NoError(t, dec.Decode(&x))
buf.WriteString("1\n")
assert.NoError(t, dec.Decode(&x))
assert.ErrorIs(t, dec.Decode(&x), io.EOF)
}
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