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jsontokenizer_test.go
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jsontokenizer_test.go
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package gojsonsm
import (
"bytes"
"fmt"
"io/ioutil"
"testing"
)
func testTokenizedStep(t *testing.T, tok *jsonTokenizer, expectedToken tokenType, expectedTokenStr string) {
t.Helper()
token, tokenData, _, err := tok.Step()
if err != nil {
t.Fatalf("encountered stepping error: %s", err)
}
if token != expectedToken {
t.Fatalf("Expected token `%s` but got `%s`", tokenToText(expectedToken), tokenToText(token))
}
if bytes.Compare(tokenData, []byte(expectedTokenStr)) != 0 {
t.Fatalf("Expected token data `%s` but got `%s`", expectedTokenStr, tokenData)
}
}
func testTokenizedValue(t *testing.T, dataBytes []byte, token tokenType, tokenData string) {
t.Helper()
// Set up the tokenizer
var tok jsonTokenizer
tok.Reset(dataBytes)
// Check that we receive the correct token
testTokenizedStep(t, &tok, token, tokenData)
// Check that we get end after the token
testTokenizedStep(t, &tok, tknEnd, "")
}
func testTokenizedValueEx(t *testing.T, data string, token tokenType) {
t.Helper()
dataBytes := []byte(data)
var testValue []byte
WHITESPACEBYTES := []byte(" \t \n ")
// Check normally
testValue = dataBytes
testTokenizedValue(t, testValue, token, data)
// Check with whitespace ahead of it
testValue = append(WHITESPACEBYTES, dataBytes...)
testTokenizedValue(t, testValue, token, data)
// Check with whitespace after of it
testValue = append(dataBytes, WHITESPACEBYTES...)
testTokenizedValue(t, testValue, token, data)
}
func TestTokenizerSeeking(t *testing.T) {
dataBytes := []byte(`{
"a": "5b47eb0936ff92a567a0307e",
"b": false
}`)
var tok jsonTokenizer
tok.Reset(dataBytes)
testTokenizedStep(t, &tok, tknObjectStart, "{")
testTokenizedStep(t, &tok, tknString, `"a"`)
savedPos := tok.Position()
testTokenizedStep(t, &tok, tknObjectKeyDelim, ":")
tok.Seek(savedPos)
testTokenizedStep(t, &tok, tknObjectKeyDelim, ":")
testTokenizedStep(t, &tok, tknString, `"5b47eb0936ff92a567a0307e"`)
}
func TestTokenizeObject(t *testing.T) {
dataBytes := []byte(`{
"a": "5b47eb0936ff92a567a0307e",
"b": false
}`)
var tok jsonTokenizer
tok.Reset(dataBytes)
testTokenizedStep(t, &tok, tknObjectStart, "{")
testTokenizedStep(t, &tok, tknString, `"a"`)
testTokenizedStep(t, &tok, tknObjectKeyDelim, ":")
testTokenizedStep(t, &tok, tknString, `"5b47eb0936ff92a567a0307e"`)
testTokenizedStep(t, &tok, tknListDelim, ",")
testTokenizedStep(t, &tok, tknString, `"b"`)
testTokenizedStep(t, &tok, tknObjectKeyDelim, ":")
testTokenizedStep(t, &tok, tknFalse, `false`)
testTokenizedStep(t, &tok, tknObjectEnd, "}")
testTokenizedStep(t, &tok, tknEnd, "")
}
func TestTokenizeArray(t *testing.T) {
dataBytes := []byte(`[
1,
2999.22,
null,
"hello\u2932world"
]`)
var tok jsonTokenizer
tok.Reset(dataBytes)
testTokenizedStep(t, &tok, tknArrayStart, "[")
testTokenizedStep(t, &tok, tknInteger, "1")
testTokenizedStep(t, &tok, tknListDelim, ",")
testTokenizedStep(t, &tok, tknNumber, "2999.22")
testTokenizedStep(t, &tok, tknListDelim, ",")
testTokenizedStep(t, &tok, tknNull, "null")
testTokenizedStep(t, &tok, tknListDelim, ",")
testTokenizedStep(t, &tok, tknEscString, `"hello\u2932world"`)
testTokenizedStep(t, &tok, tknArrayEnd, "]")
testTokenizedStep(t, &tok, tknEnd, "")
}
func TestTokenizeString(t *testing.T) {
testTokenizedValueEx(t, `"lol"`, tknString)
}
func TestTokenizeEscString(t *testing.T) {
testTokenizedValueEx(t, `"l\nol"`, tknEscString)
testTokenizedValueEx(t, `"l\u2321ol"`, tknEscString)
}
func TestTokenizeInteger(t *testing.T) {
testTokenizedValueEx(t, `0`, tknInteger)
testTokenizedValueEx(t, `123`, tknInteger)
testTokenizedValueEx(t, `4565464651846548`, tknInteger)
}
func TestTokenizeNumber(t *testing.T) {
testTokenizedValueEx(t, `0.1`, tknNumber)
testTokenizedValueEx(t, `1999.1`, tknNumber)
testTokenizedValueEx(t, `14.29438383`, tknNumber)
testTokenizedValueEx(t, `1.0E+2`, tknNumber)
testTokenizedValueEx(t, `1.9e+22`, tknNumber)
}
func TestTokenizeBool(t *testing.T) {
testTokenizedValueEx(t, `true`, tknTrue)
testTokenizedValueEx(t, `false`, tknFalse)
}
func TestTokenizeNull(t *testing.T) {
testTokenizedValueEx(t, `null`, tknNull)
}
func TestTokenizeEndsForever(t *testing.T) {
dataBytes := []byte(`"hello world"`)
var tok jsonTokenizer
tok.Reset(dataBytes)
testTokenizedStep(t, &tok, tknString, `"hello world"`)
testTokenizedStep(t, &tok, tknEnd, "")
testTokenizedStep(t, &tok, tknEnd, "")
}
func TestTokenizerLong(t *testing.T) {
dataBytes, err := ioutil.ReadFile("testdata/people.json")
if err != nil {
panic(fmt.Sprintf("failed to read test data file: %s", err))
}
var tok jsonTokenizer
tok.Reset(dataBytes)
for {
token, _, _, err := tok.Step()
if err != nil {
panic(fmt.Sprintf("encountered stepping error: %s", err))
}
if token == tknEnd {
break
}
}
}
func BenchmarkTokenize(b *testing.B) {
var tok jsonTokenizer
dataBytes, err := ioutil.ReadFile("testdata/people.json")
if err != nil {
panic(fmt.Sprintf("failed to read test data file: %s", err))
}
b.SetBytes(int64(len(dataBytes)))
b.ResetTimer()
for j := 0; j < b.N; j++ {
tok.Reset(dataBytes)
for {
token, _, _, err := tok.Step()
if err != nil {
panic(fmt.Sprintf("encountered stepping error: %s", err))
}
if token == tknEnd {
break
}
}
}
}