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stream_test.go
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stream_test.go
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package ljson
import (
"bytes"
"reflect"
"testing"
)
// Test values for the stream test.
// One of each JSON kind.
var streamTest = []interface{}{
0.1,
"hello",
nil,
true,
false,
[]interface{}{"a", "b", "c"},
map[string]interface{}{"K": "Kelvin", "ß": "long s"},
3.14, // another value to make sure something can follow map
}
var streamEncoded = `0.1
"hello"
null
true
false
["a","b","c"]
{"ß":"long s","K":"Kelvin"}
3.14
`
func TestDecoder(t *testing.T) {
for i := 0; i <= len(streamTest); i++ {
// Use stream without newlines as input,
// just to stress the decoder even more.
// Our test input does not include back-to-back numbers.
// Otherwise stripping the newlines would
// merge two adjacent JSON values.
var buf bytes.Buffer
for _, c := range nlines(streamEncoded, i) {
if c != '\n' {
buf.WriteRune(c)
}
}
out := make([]interface{}, i)
dec := NewDecoder(&buf)
for j := range out {
if err := dec.Decode(&out[j]); err != nil {
t.Fatalf("decode #%d/%d: %v", j, i, err)
}
}
if !reflect.DeepEqual(out, streamTest[0:i]) {
t.Errorf("decoding %d items: mismatch", i)
for j := range out {
if !reflect.DeepEqual(out[j], streamTest[j]) {
t.Errorf("#%d: have %v want %v", j, out[j], streamTest[j])
}
}
break
}
}
}
func nlines(s string, n int) string {
if n <= 0 {
return ""
}
for i, c := range s {
if c == '\n' {
if n--; n == 0 {
return s[0 : i+1]
}
}
}
return s
}