package kubernetes
import (
"strings"
"testing"
"time"
"github.com/mholt/caddy"
"k8s.io/client-go/1.5/pkg/api/unversioned"
)
func TestKubernetesParse(t *testing.T) {
tests := []struct {
input string // Corefile data as string
shouldErr bool // true if test case is exected to produce an error.
expectedErrContent string // substring from the expected error. Empty for positive cases.
expectedZoneCount int // expected count of defined zones.
expectedNSCount int // expected count of namespaces.
expectedResyncPeriod time.Duration // expected resync period value
expectedLabelSelector string // expected label selector value
expectedPodMode string
expectedFallthrough bool
expectedUpstreams []string
}{
// positive
{
`kubernetes coredns.local`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local test.local`,
false,
"",
2,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
endpoint http://localhost:9090
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
namespaces demo
}`,
false,
"",
1,
1,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
namespaces demo test
}`,
false,
"",
1,
2,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
resyncperiod 30s
}`,
false,
"",
1,
0,
30 * time.Second,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
resyncperiod 15m
}`,
false,
"",
1,
0,
15 * time.Minute,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
labels environment=prod
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"environment=prod",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
labels environment in (production, staging, qa),application=nginx
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"application=nginx,environment in (production,qa,staging)",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local test.local {
resyncperiod 15m
endpoint http://localhost:8080
namespaces demo test
labels environment in (production, staging, qa),application=nginx
fallthrough
}`,
false,
"",
2,
2,
15 * time.Minute,
"application=nginx,environment in (production,qa,staging)",
podModeDisabled,
true,
nil,
},
// negative
{
`kubernetes coredns.local {
endpoint
}`,
true,
"rong argument count or unexpected line ending",
-1,
-1,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
namespaces
}`,
true,
"rong argument count or unexpected line ending",
-1,
-1,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
resyncperiod
}`,
true,
"rong argument count or unexpected line ending",
-1,
0,
0 * time.Minute,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
resyncperiod 15
}`,
true,
"unable to parse resync duration value",
-1,
0,
0 * time.Second,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
resyncperiod abc
}`,
true,
"unable to parse resync duration value",
-1,
0,
0 * time.Second,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
labels
}`,
true,
"rong argument count or unexpected line ending",
-1,
0,
0 * time.Second,
"",
podModeDisabled,
false,
nil,
},
{
`kubernetes coredns.local {
labels environment in (production, qa
}`,
true,
"unable to parse label selector",
-1,
0,
0 * time.Second,
"",
podModeDisabled,
false,
nil,
},
// pods disabled
{
`kubernetes coredns.local {
pods disabled
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
// pods insecure
{
`kubernetes coredns.local {
pods insecure
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeInsecure,
false,
nil,
},
// pods verified
{
`kubernetes coredns.local {
pods verified
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeVerified,
false,
nil,
},
// pods invalid
{
`kubernetes coredns.local {
pods giant_seed
}`,
true,
"rong value for pods",
-1,
0,
defaultResyncPeriod,
"",
podModeVerified,
false,
nil,
},
// fallthrough invalid
{
`kubernetes coredns.local {
fallthrough junk
}`,
true,
"rong argument count",
-1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
// Valid upstream
{
`kubernetes coredns.local {
upstream 13.14.15.16:53
}`,
false,
"",
1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
[]string{"13.14.15.16:53"},
},
// Invalid upstream
{
`kubernetes coredns.local {
upstream 13.14.15.16orange
}`,
true,
"not an IP address or file: \"13.14.15.16orange\"",
-1,
0,
defaultResyncPeriod,
"",
podModeDisabled,
false,
nil,
},
}
for i, test := range tests {
c := caddy.NewTestController("dns", test.input)
k8sController, opts, err := kubernetesParse(c)
if test.shouldErr && err == nil {
t.Errorf("Test %d: Expected error, but did not find error for input '%s'. Error was: '%v'", i, test.input, err)
}
if err != nil {
if !test.shouldErr {
t.Errorf("Test %d: Expected no error but found one for input %s. Error was: %v", i, test.input, err)
continue
}
if test.shouldErr && (len(test.expectedErrContent) < 1) {
t.Fatalf("Test %d: Test marked as expecting an error, but no expectedErrContent provided for input '%s'. Error was: '%v'", i, test.input, err)
}
if test.shouldErr && (test.expectedZoneCount >= 0) {
t.Errorf("Test %d: Test marked as expecting an error, but provides value for expectedZoneCount!=-1 for input '%s'. Error was: '%v'", i, test.input, err)
}
if !strings.Contains(err.Error(), test.expectedErrContent) {
t.Errorf("Test %d: Expected error to contain: %v, found error: %v, input: %s", i, test.expectedErrContent, err, test.input)
}
continue
}
// No error was raised, so validate initialization of k8sController
// Zones
foundZoneCount := len(k8sController.Zones)
if foundZoneCount != test.expectedZoneCount {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d zones, instead found %d zones: '%v' for input '%s'", i, test.expectedZoneCount, foundZoneCount, k8sController.Zones, test.input)
}
// Namespaces
foundNSCount := len(k8sController.Namespaces)
if foundNSCount != test.expectedNSCount {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d namespaces. Instead found %d namespaces: '%v' for input '%s'", i, test.expectedNSCount, foundNSCount, k8sController.Namespaces, test.input)
}
// ResyncPeriod
foundResyncPeriod := opts.resyncPeriod
if foundResyncPeriod != test.expectedResyncPeriod {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with resync period '%s'. Instead found period '%s' for input '%s'", i, test.expectedResyncPeriod, foundResyncPeriod, test.input)
}
// Labels
if opts.labelSelector != nil {
foundLabelSelectorString := unversioned.FormatLabelSelector(opts.labelSelector)
if foundLabelSelectorString != test.expectedLabelSelector {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with label selector '%s'. Instead found selector '%s' for input '%s'", i, test.expectedLabelSelector, foundLabelSelectorString, test.input)
}
}
// Pods
foundPodMode := k8sController.podMode
if foundPodMode != test.expectedPodMode {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with pod mode '%s'. Instead found pod mode '%s' for input '%s'", i, test.expectedPodMode, foundPodMode, test.input)
}
// fallthrough
foundFallthrough := k8sController.Fallthrough
if foundFallthrough != test.expectedFallthrough {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with fallthrough '%v'. Instead found fallthrough '%v' for input '%s'", i, test.expectedFallthrough, foundFallthrough, test.input)
}
// upstream
foundUpstreams := k8sController.Proxy.Upstreams
if test.expectedUpstreams == nil {
if foundUpstreams != nil {
t.Errorf("Test %d: Expected kubernetes controller to not be initialized with upstreams for input '%s'", i, test.input)
}
} else {
if foundUpstreams == nil {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with upstreams for input '%s'", i, test.input)
} else {
if len(*foundUpstreams) != len(test.expectedUpstreams) {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with %d upstreams. Instead found %d upstreams for input '%s'", i, len(test.expectedUpstreams), len(*foundUpstreams), test.input)
}
for j, want := range test.expectedUpstreams {
got := (*foundUpstreams)[j].Select().Name
if got != want {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with upstream '%s'. Instead found upstream '%s' for input '%s'", i, want, got, test.input)
}
}
}
}
}
}