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range_test.go
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range_test.go
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// go test -v -run="TestIPRangeToCIDRs"
package cidrman
import (
"reflect"
"testing"
)
func TestIPRangeToCIDRs(t *testing.T) {
type TestCase struct {
Lo string
Hi string
Output []string
Error bool
}
testCases := []TestCase{
{
Lo: "abcdefgh",
Hi: "",
Output: nil,
Error: true,
},
{
Lo: "192.168.1.12",
Hi: "192.168.1.11",
Output: nil,
Error: true,
},
{
Lo: "0.0.0.1",
Hi: "2001:0db8:0000:0000:0000:ff00:0042:8329",
Output: nil,
Error: true,
},
{
Lo: "192.168.1.1",
Hi: "192.168.1.1",
Output: []string{
"192.168.1.1/32",
},
Error: false,
},
{
Lo: "192.168.1.1",
Hi: "192.168.1.12",
Output: []string{
"192.168.1.1/32",
"192.168.1.2/31",
"192.168.1.4/30",
"192.168.1.8/30",
"192.168.1.12/32",
},
Error: false,
},
// Worst case.
{
Lo: "0.0.0.1",
Hi: "255.255.255.254",
Output: []string{
"0.0.0.1/32",
"0.0.0.2/31",
"0.0.0.4/30",
"0.0.0.8/29",
"0.0.0.16/28",
"0.0.0.32/27",
"0.0.0.64/26",
"0.0.0.128/25",
"0.0.1.0/24",
"0.0.2.0/23",
"0.0.4.0/22",
"0.0.8.0/21",
"0.0.16.0/20",
"0.0.32.0/19",
"0.0.64.0/18",
"0.0.128.0/17",
"0.1.0.0/16",
"0.2.0.0/15",
"0.4.0.0/14",
"0.8.0.0/13",
"0.16.0.0/12",
"0.32.0.0/11",
"0.64.0.0/10",
"0.128.0.0/9",
"1.0.0.0/8",
"2.0.0.0/7",
"4.0.0.0/6",
"8.0.0.0/5",
"16.0.0.0/4",
"32.0.0.0/3",
"64.0.0.0/2",
"128.0.0.0/2",
"192.0.0.0/3",
"224.0.0.0/4",
"240.0.0.0/5",
"248.0.0.0/6",
"252.0.0.0/7",
"254.0.0.0/8",
"255.0.0.0/9",
"255.128.0.0/10",
"255.192.0.0/11",
"255.224.0.0/12",
"255.240.0.0/13",
"255.248.0.0/14",
"255.252.0.0/15",
"255.254.0.0/16",
"255.255.0.0/17",
"255.255.128.0/18",
"255.255.192.0/19",
"255.255.224.0/20",
"255.255.240.0/21",
"255.255.248.0/22",
"255.255.252.0/23",
"255.255.254.0/24",
"255.255.255.0/25",
"255.255.255.128/26",
"255.255.255.192/27",
"255.255.255.224/28",
"255.255.255.240/29",
"255.255.255.248/30",
"255.255.255.252/31",
"255.255.255.254/32",
},
Error: false,
},
{
Lo: "0.0.0.0",
Hi: "255.255.255.255",
Output: []string{
"0.0.0.0/0",
},
Error: false,
},
{
Lo: "0000:0000:0000:0000:0000:0000:0000:0000",
Hi: "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
Output: []string{
"::/0",
},
Error: false,
},
{
Lo: "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
Hi: "ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffd",
Output: nil,
Error: true,
},
{
Lo: "ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffd",
Hi: "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff",
Output: []string{
"ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffd/128",
"ffff:ffff:ffff:ffff:ffff:ffff:ffff:fffe/127",
},
Error: false,
},
{
Lo: "2001:0db8:0000:0000:0000:ff00:0042:8328",
Hi: "2001:0db8:0000:0000:0000:ff00:0042:8328",
Output: []string{
"2001:db8::ff00:42:8328/128",
},
Error: false,
},
}
for _, testCase := range testCases {
output, err := IPRangeToCIDRs(testCase.Lo, testCase.Hi)
if err != nil {
if !testCase.Error {
t.Errorf("IPRangeToCIDRs(%s, %s) failed: %s", testCase.Lo, testCase.Hi, err.Error())
}
continue
}
if !reflect.DeepEqual(testCase.Output, output) {
t.Errorf("IPRangeToCIDRs(%s, %s) expected: %#v, got: %#v", testCase.Lo, testCase.Hi, testCase.Output, output)
}
}
}