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//go:build !windows
package libnetwork
import (
"context"
"testing"
"github.com/docker/docker/libnetwork/resolvconf"
"gotest.tools/v3/assert"
is "gotest.tools/v3/assert/cmp"
)
func TestDNSOptions(t *testing.T) {
c, err := New(OptionBoltdbWithRandomDBFile(t))
assert.NilError(t, err)
sb, err := c.NewSandbox(context.Background(), "cnt1", nil)
assert.NilError(t, err)
cleanup := func(s *Sandbox) {
if err := s.Delete(context.Background()); err != nil {
t.Error(err)
}
}
defer cleanup(sb)
sb.startResolver(false)
err = sb.setupDNS()
assert.NilError(t, err)
err = sb.rebuildDNS()
assert.NilError(t, err)
currRC, err := resolvconf.GetSpecific(sb.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList := resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.Len(dnsOptionsList, 1))
assert.Check(t, is.Equal("ndots:0", dnsOptionsList[0]))
sb.config.dnsOptionsList = []string{"ndots:5"}
err = sb.setupDNS()
assert.NilError(t, err)
currRC, err = resolvconf.GetSpecific(sb.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList = resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.Len(dnsOptionsList, 1))
assert.Check(t, is.Equal("ndots:5", dnsOptionsList[0]))
err = sb.rebuildDNS()
assert.NilError(t, err)
currRC, err = resolvconf.GetSpecific(sb.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList = resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.Len(dnsOptionsList, 1))
assert.Check(t, is.Equal("ndots:5", dnsOptionsList[0]))
sb2, err := c.NewSandbox(context.Background(), "cnt2", nil)
assert.NilError(t, err)
defer cleanup(sb2)
sb2.startResolver(false)
sb2.config.dnsOptionsList = []string{"ndots:0"}
err = sb2.setupDNS()
assert.NilError(t, err)
err = sb2.rebuildDNS()
assert.NilError(t, err)
currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList = resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.Len(dnsOptionsList, 1))
assert.Check(t, is.Equal("ndots:0", dnsOptionsList[0]))
sb2.config.dnsOptionsList = []string{"ndots:foobar"}
err = sb2.setupDNS()
assert.NilError(t, err)
err = sb2.rebuildDNS()
assert.NilError(t, err)
currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList = resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.DeepEqual([]string{"ndots:0"}, dnsOptionsList))
sb2.config.dnsOptionsList = []string{"ndots:-1"}
err = sb2.setupDNS()
assert.NilError(t, err)
err = sb2.rebuildDNS()
assert.NilError(t, err)
currRC, err = resolvconf.GetSpecific(sb2.config.resolvConfPath)
assert.NilError(t, err)
dnsOptionsList = resolvconf.GetOptions(currRC.Content)
assert.Check(t, is.DeepEqual([]string{"ndots:0"}, dnsOptionsList))
}
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