mirror of
https://github.com/coredns/coredns.git
synced 2025-11-04 03:03:14 -05:00
103 lines
1.8 KiB
Go
103 lines
1.8 KiB
Go
package tree
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import (
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"net"
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"os"
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"strings"
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"testing"
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"github.com/miekg/dns"
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)
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func TestPrint(t *testing.T) {
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rr1 := dns.A{
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Hdr: dns.RR_Header{
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Name: dns.Fqdn("server1.example.com"),
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Rrtype: 1,
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Class: 1,
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Ttl: 3600,
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Rdlength: 0,
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},
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A: net.IPv4(10, 0, 1, 1),
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}
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rr2 := dns.A{
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Hdr: dns.RR_Header{
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Name: dns.Fqdn("server2.example.com"),
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Rrtype: 1,
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Class: 1,
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Ttl: 3600,
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Rdlength: 0,
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},
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A: net.IPv4(10, 0, 1, 2),
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}
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rr3 := dns.A{
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Hdr: dns.RR_Header{
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Name: dns.Fqdn("server3.example.com"),
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Rrtype: 1,
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Class: 1,
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Ttl: 3600,
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Rdlength: 0,
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},
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A: net.IPv4(10, 0, 1, 3),
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}
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rr4 := dns.A{
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Hdr: dns.RR_Header{
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Name: dns.Fqdn("server4.example.com"),
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Rrtype: 1,
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Class: 1,
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Ttl: 3600,
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Rdlength: 0,
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},
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A: net.IPv4(10, 0, 1, 4),
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}
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tree := Tree{
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Root: nil,
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Count: 0,
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}
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tree.Insert(&rr1)
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tree.Insert(&rr2)
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tree.Insert(&rr3)
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tree.Insert(&rr4)
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/**
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build a LLRB tree, the height of the tree is 3, look like:
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server2.example.com.
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/ \
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server1.example.com. server4.example.com.
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/
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server3.example.com.
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*/
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f, err := os.Create("tmp")
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if err != nil {
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t.Error(err)
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}
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//Redirect the printed results to a tmp file for later comparison
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os.Stdout = f
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tree.Print()
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/**
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server2.example.com.
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server1.example.com. server4.example.com.
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server3.example.com.
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*/
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buf := make([]byte, 256)
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f.Seek(0, 0)
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_, er := f.Read(buf)
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if er != nil {
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t.Error(err)
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}
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height := strings.Count(string(buf), ". \n")
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//Compare the height of the print with the actual height of the tree
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if height != 3 {
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f.Close()
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os.Remove("tmp")
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t.Fatal("The number of rows is inconsistent with the actual number of rows in the tree itself.")
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}
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f.Close()
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os.Remove("tmp")
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}
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