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// Copyright 2020-2023 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package parser
import (
"errors"
"math"
"reflect"
"strconv"
"strings"
"testing"
)
func TestParseNum(t *testing.T) {
tests := []struct {
name string
given string
expected uint64
}{
{
name: "parse 191817",
given: "191817",
expected: 191817,
},
{
name: "parse 0",
given: "0",
expected: 0,
},
{
name: "parse 00",
given: "00",
expected: 0,
},
{
name: "empty string",
given: "",
expected: 0,
},
{
name: "negative number",
given: "-123",
expected: 0,
},
{
name: "not a number",
given: "abc",
expected: 0,
},
{
name: "max uit64",
given: strconv.FormatUint(math.MaxUint64, 10),
expected: math.MaxUint64,
},
{
name: "max uit64 + 2, overflow",
given: "18446744073709551617",
expected: 1,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
res := ParseNum(test.given)
if res != test.expected {
t.Fatalf("Invalid result; want: %d; got: %d", test.expected, res)
}
})
}
}
func FuzzParseNum(f *testing.F) {
testcases := []string{"191817", " ", "-123", "abc"}
for _, tc := range testcases {
f.Add(tc)
}
f.Fuzz(func(t *testing.T, given string) {
given = strings.TrimLeft(given, "+")
res := ParseNum(given)
parsed, err := strconv.ParseUint(given, 10, 64)
if err != nil && !errors.Is(err, strconv.ErrRange) {
if res != 0 {
t.Errorf("given: %s; expected: -1; got: %d; err: %v", given, res, err)
}
} else if err == nil && res != parsed {
t.Errorf("given: %s; expected: %d; got: %d", given, parsed, res)
}
})
}
func TestGetMetadataFields(t *testing.T) {
tests := []struct {
name string
subject string
expected []string
withError error
}{
{
name: "parse v2 tokens",
subject: "$JS.ACK.domain.hash-123.stream.cons.100.200.150.123456789.100.token",
expected: []string{"$JS", "ACK", "domain", "hash-123", "stream", "cons", "100", "200", "150", "123456789", "100", "token"},
},
{
name: "parse v2 tokens with underscore domain",
subject: "$JS.ACK._.hash-123.stream.cons.100.200.150.123456789.100.token",
expected: []string{"$JS", "ACK", "", "hash-123", "stream", "cons", "100", "200", "150", "123456789", "100", "token"},
},
{
name: "parse v1 tokens",
subject: "$JS.ACK.stream.cons.100.200.150.123456789.100",
expected: []string{"$JS", "ACK", "", "", "stream", "cons", "100", "200", "150", "123456789", "100"},
},
{
name: "invalid start of subject",
subject: "$ABC.123.stream.cons.100.200.150.123456789.100",
withError: ErrInvalidSubjectFormat,
},
{
name: "invalid subject length (10)",
subject: "$JS.ACK.stream.cons.100.200.150.123456789.100.ABC",
withError: ErrInvalidSubjectFormat,
},
{
name: "invalid subject length (5)",
subject: "$JS.ACK.stream.cons.100",
withError: ErrInvalidSubjectFormat,
},
{
name: "invalid subject ",
subject: "",
withError: ErrInvalidSubjectFormat,
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
res, err := GetMetadataFields(test.subject)
if test.withError != nil {
if err == nil || !errors.Is(err, test.withError) {
t.Fatalf("Expected error: %v; got: %v", test.withError, err)
}
return
}
if !reflect.DeepEqual(test.expected, res) {
t.Fatalf("Invalid result; want: %v; got: %v", test.expected, res)
}
})
}
}
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