package kubernetes
import (
"strings"
"testing"
"time"
"github.com/mholt/caddy"
unversionedapi "k8s.io/kubernetes/pkg/api/unversioned"
)
func TestKubernetesParse(t *testing.T) {
tests := []struct {
description string // Human-facing description of test case
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.
expectedNTValid bool // NameTemplate to be initialized and valid
expectedNSCount int // expected count of namespaces.
expectedResyncPeriod time.Duration // expected resync period value
expectedLabelSelector string // expected label selector value
}{
// positive
{
"kubernetes keyword with one zone",
`kubernetes coredns.local`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"",
},
{
"kubernetes keyword with multiple zones",
`kubernetes coredns.local test.local`,
false,
"",
2,
true,
0,
defaultResyncPeriod,
"",
},
{
"kubernetes keyword with zone and empty braces",
`kubernetes coredns.local {
}`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"",
},
{
"endpoint keyword with url",
`kubernetes coredns.local {
endpoint http://localhost:9090
}`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"",
},
{
"template keyword with valid template",
`kubernetes coredns.local {
template {service}.{namespace}.{zone}
}`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"",
},
{
"namespaces keyword with one namespace",
`kubernetes coredns.local {
namespaces demo
}`,
false,
"",
1,
true,
1,
defaultResyncPeriod,
"",
},
{
"namespaces keyword with multiple namespaces",
`kubernetes coredns.local {
namespaces demo test
}`,
false,
"",
1,
true,
2,
defaultResyncPeriod,
"",
},
{
"resync period in seconds",
`kubernetes coredns.local {
resyncperiod 30s
}`,
false,
"",
1,
true,
0,
30 * time.Second,
"",
},
{
"resync period in minutes",
`kubernetes coredns.local {
resyncperiod 15m
}`,
false,
"",
1,
true,
0,
15 * time.Minute,
"",
},
{
"basic label selector",
`kubernetes coredns.local {
labels environment=prod
}`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"environment=prod",
},
{
"multi-label selector",
`kubernetes coredns.local {
labels environment in (production, staging, qa),application=nginx
}`,
false,
"",
1,
true,
0,
defaultResyncPeriod,
"application=nginx,environment in (production,qa,staging)",
},
{
"fully specified valid config",
`kubernetes coredns.local test.local {
resyncperiod 15m
endpoint http://localhost:8080
template {service}.{namespace}.{zone}
namespaces demo test
labels environment in (production, staging, qa),application=nginx
}`,
false,
"",
2,
true,
2,
15 * time.Minute,
"application=nginx,environment in (production,qa,staging)",
},
// negative
{
"no kubernetes keyword",
"",
true,
"Kubernetes setup called without keyword 'kubernetes' in Corefile",
-1,
false,
-1,
defaultResyncPeriod,
"",
},
{
"kubernetes keyword without a zone",
`kubernetes`,
true,
"Zone name must be provided for kubernetes middleware",
-1,
true,
0,
defaultResyncPeriod,
"",
},
{
"endpoint keyword without an endpoint value",
`kubernetes coredns.local {
endpoint
}`,
true,
"Wrong argument count or unexpected line ending after 'endpoint'",
-1,
true,
-1,
defaultResyncPeriod,
"",
},
{
"template keyword without a template value",
`kubernetes coredns.local {
template
}`,
true,
"Wrong argument count or unexpected line ending after 'template'",
-1,
false,
0,
defaultResyncPeriod,
"",
},
{
"template keyword with an invalid template value",
`kubernetes coredns.local {
template {namespace}.{zone}
}`,
true,
"Record name template does not pass NameTemplate validation",
-1,
false,
0,
defaultResyncPeriod,
"",
},
{
"namespace keyword without a namespace value",
`kubernetes coredns.local {
namespaces
}`,
true,
"Parse error: Wrong argument count or unexpected line ending after 'namespaces'",
-1,
true,
-1,
defaultResyncPeriod,
"",
},
{
"resyncperiod keyword without a duration value",
`kubernetes coredns.local {
resyncperiod
}`,
true,
"Wrong argument count or unexpected line ending after 'resyncperiod'",
-1,
true,
0,
0 * time.Minute,
"",
},
{
"resync period no units",
`kubernetes coredns.local {
resyncperiod 15
}`,
true,
"Unable to parse resync duration value. Value provided was ",
-1,
true,
0,
0 * time.Second,
"",
},
{
"resync period invalid",
`kubernetes coredns.local {
resyncperiod abc
}`,
true,
"Unable to parse resync duration value. Value provided was ",
-1,
true,
0,
0 * time.Second,
"",
},
{
"labels with no selector value",
`kubernetes coredns.local {
labels
}`,
true,
"Wrong argument count or unexpected line ending after 'labels'",
-1,
true,
0,
0 * time.Second,
"",
},
{
"labels with invalid selector value",
`kubernetes coredns.local {
labels environment in (production, qa
}`,
true,
"Unable to parse label selector. Value provided was",
-1,
true,
0,
0 * time.Second,
"",
},
}
t.Logf("Parser test cases count: %v", len(tests))
for i, test := range tests {
c := caddy.NewTestController("dns", test.input)
k8sController, err := kubernetesParse(c)
t.Logf("setup test: %2v -- %v\n", i, test.description)
//t.Logf("controller: %v\n", k8sController)
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)
}
// NameTemplate
if k8sController.NameTemplate == nil {
t.Errorf("Test %d: Expected kubernetes controller to be initialized with a NameTemplate. Instead found '%v' for input '%s'", i, k8sController.NameTemplate, test.input)
} else {
foundNTValid := k8sController.NameTemplate.IsValid()
if foundNTValid != test.expectedNTValid {
t.Errorf("Test %d: Expected NameTemplate validity to be '%v', instead found '%v' for input '%s'", i, test.expectedNTValid, foundNTValid, 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 := k8sController.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 k8sController.LabelSelector != nil {
foundLabelSelectorString := unversionedapi.FormatLabelSelector(k8sController.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)
}
}
}
}