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package packet
import (
"errors"
"testing"
"fmt"
"math"
"strconv"
"github.com/stretchr/testify/assert"
)
func TestParseLargeCommunityString(t *testing.T) {
tests := []struct {
name string
in string
expected LargeCommunity
err error
}{
{
name: "normal large community",
in: "(1,2,3)",
expected: LargeCommunity{
GlobalAdministrator: 1,
DataPart1: 2,
DataPart2: 3,
},
err: nil,
},
{
name: "too short community",
in: "(1,2)",
expected: LargeCommunity{},
err: errors.New("malformed large community string (1,2)"),
},
{
name: "missing parentheses large community",
in: "1,2,3",
expected: LargeCommunity{
GlobalAdministrator: 1,
DataPart1: 2,
DataPart2: 3,
},
err: nil,
},
{
name: "malformed large community",
in: "[1,2,3]",
expected: LargeCommunity{},
err: errors.New("malformed large community string [1,2,3]"),
},
{
name: "missing digit",
in: "(,2,3)",
expected: LargeCommunity{},
err: errors.New("malformed large community string (,2,3)"),
},
{
name: "to big global administrator",
in: fmt.Sprintf("(%d,1,2)", math.MaxInt64),
expected: LargeCommunity{},
err: &strconv.NumError{Func: "ParseUint", Num: fmt.Sprintf("%d", math.MaxInt64), Err: strconv.ErrRange},
},
{
name: "to big data part 1",
in: fmt.Sprintf("(1,%d,2)", math.MaxInt64),
expected: LargeCommunity{1, 0, 0},
err: &strconv.NumError{Func: "ParseUint", Num: fmt.Sprintf("%d", math.MaxInt64), Err: strconv.ErrRange},
},
{
name: "to big data part 2",
in: fmt.Sprintf("(1,2,%d)", math.MaxInt64),
expected: LargeCommunity{1, 2, 0},
err: &strconv.NumError{Func: "ParseUint", Num: fmt.Sprintf("%d", math.MaxInt64), Err: strconv.ErrRange},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
com, err := ParseLargeCommunityString(test.in)
assert.Equal(t, test.err, err)
assert.Equal(t, test.expected, com)
})
}
}