controller_test.go

Documentation: github.com/GoogleCloudPlatform/k8s-config-connector/pkg/controller/unmanageddetector

     1  // Copyright 2022 Google LLC
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package unmanageddetector_test
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  	"reflect"
    21  	"testing"
    22  
    23  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/apis/k8s/v1alpha1"
    24  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/controller/unmanageddetector"
    25  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/k8s"
    26  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/randomid"
    27  	"github.com/GoogleCloudPlatform/k8s-config-connector/pkg/test"
    28  	testcontroller "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/test/controller"
    29  	testmain "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/test/main"
    30  	testvariable "github.com/GoogleCloudPlatform/k8s-config-connector/pkg/test/resourcefixture/variable"
    31  	"github.com/google/go-cmp/cmp"
    32  
    33  	corev1 "k8s.io/api/core/v1"
    34  	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
    35  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    36  	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
    37  	"k8s.io/apimachinery/pkg/types"
    38  	"sigs.k8s.io/controller-runtime/pkg/client"
    39  	"sigs.k8s.io/controller-runtime/pkg/manager"
    40  	"sigs.k8s.io/controller-runtime/pkg/reconcile"
    41  )
    42  
    43  var (
    44  	mgr manager.Manager
    45  
    46  	fakeCRD = newTestKindCRD()
    47  )
    48  
    49  func TestReconcile_UnmanagedResource(t *testing.T) {
    50  	t.Parallel()
    51  	testID := testvariable.NewUniqueId()
    52  	client := mgr.GetClient()
    53  	testcontroller.EnsureNamespaceExistsT(t, client, k8s.SystemNamespace)
    54  	testcontroller.EnsureNamespaceExistsT(t, client, testID)
    55  
    56  	resourceNN := types.NamespacedName{
    57  		Namespace: testID,
    58  		Name:      testID,
    59  	}
    60  	resource := newTestKindUnstructured(resourceNN)
    61  	test.EnsureObjectExists(t, resource, client)
    62  
    63  	reconciler, err := unmanageddetector.NewReconciler(mgr, fakeCRD)
    64  	if err != nil {
    65  		t.Fatalf("error creating reconciler: %v", err)
    66  	}
    67  	res, err := reconciler.Reconcile(context.TODO(), reconcile.Request{NamespacedName: resourceNN})
    68  	if err != nil {
    69  		t.Fatalf("unexpected error during reconciliation: %v", err)
    70  	}
    71  	emptyResult := reconcile.Result{}
    72  	if got, want := res, emptyResult; !reflect.DeepEqual(got, want) {
    73  		t.Fatalf("unexpected diff in reconcile result (-want +got): \n%v", cmp.Diff(want, got))
    74  	}
    75  
    76  	condition, found, err := getCurrentCondition(context.TODO(), client, resource)
    77  	if err != nil {
    78  		t.Fatalf("error getting resource's condition: %v", err)
    79  	}
    80  	if !found {
    81  		t.Fatalf("got nil condition for resource, want non-nil condition with reason '%v'", k8s.Unmanaged)
    82  	}
    83  	if gotReason, wantReason := condition.Reason, k8s.Unmanaged; gotReason != wantReason {
    84  		t.Fatalf("got condition with reason '%v' for resource, want condition with reason '%v'", gotReason, wantReason)
    85  	}
    86  	if gotStatus, wantStatus := condition.Status, corev1.ConditionFalse; gotStatus != wantStatus {
    87  		t.Fatalf("got condition with status '%v' for resource, want condition with status '%v'", gotStatus, wantStatus)
    88  	}
    89  }
    90  
    91  func TestReconcile_ManagedResource(t *testing.T) {
    92  	t.Parallel()
    93  	testID := testvariable.NewUniqueId()
    94  	client := mgr.GetClient()
    95  	testcontroller.EnsureNamespaceExistsT(t, client, k8s.SystemNamespace)
    96  	testcontroller.EnsureNamespaceExistsT(t, client, testID)
    97  
    98  	resourceNN := types.NamespacedName{
    99  		Namespace: testID,
   100  		Name:      testID,
   101  	}
   102  	resource := newTestKindUnstructured(resourceNN)
   103  	test.EnsureObjectExists(t, resource, client)
   104  
   105  	controller := newControllerUnstructuredForNamespace(resourceNN.Namespace)
   106  	test.EnsureObjectExists(t, controller, client)
   107  
   108  	reconciler, err := unmanageddetector.NewReconciler(mgr, fakeCRD)
   109  	if err != nil {
   110  		t.Fatalf("error creating reconciler: %v", err)
   111  	}
   112  	res, err := reconciler.Reconcile(context.TODO(), reconcile.Request{NamespacedName: resourceNN})
   113  	if err != nil {
   114  		t.Fatalf("unexpected error during reconciliation: %v", err)
   115  	}
   116  	emptyResult := reconcile.Result{}
   117  	if got, want := res, emptyResult; !reflect.DeepEqual(got, want) {
   118  		t.Fatalf("unexpected diff in reconcile result (-want +got): \n%v", cmp.Diff(want, got))
   119  	}
   120  
   121  	condition, found, err := getCurrentCondition(context.TODO(), client, resource)
   122  	if err != nil {
   123  		t.Fatalf("error getting resource's condition: %v", err)
   124  	}
   125  	if found {
   126  		t.Fatalf("got non-nil condition '%v' for resource, want nil condition", condition)
   127  	}
   128  }
   129  
   130  func newTestKindCRD() *apiextensions.CustomResourceDefinition {
   131  	crd := test.CRDForGVK(metav1.GroupVersionKind{
   132  		Group:   "test.cnrm.cloud.google.com",
   133  		Version: "v1beta1",
   134  		Kind:    "TestKind",
   135  	})
   136  	// Enable the status subresource for this CRD. This is needed to allow
   137  	// UpdateStatus() calls to work on custom resources belonging to this CRD
   138  	// on the API server.
   139  	crd.Spec.Versions[0].Subresources = &apiextensions.CustomResourceSubresources{
   140  		Status: &apiextensions.CustomResourceSubresourceStatus{},
   141  	}
   142  	return crd
   143  }
   144  
   145  func newTestKindUnstructured(nn types.NamespacedName) *unstructured.Unstructured {
   146  	return &unstructured.Unstructured{
   147  		Object: map[string]interface{}{
   148  			"apiVersion": fmt.Sprintf("%v/%v", fakeCRD.Spec.Group, k8s.GetVersionFromCRD(fakeCRD)),
   149  			"kind":       fakeCRD.Spec.Names.Kind,
   150  			"metadata": map[string]interface{}{
   151  				"namespace": nn.Namespace,
   152  				"name":      nn.Name,
   153  			},
   154  		},
   155  	}
   156  }
   157  
   158  func newControllerUnstructuredForNamespace(namespace string) *unstructured.Unstructured {
   159  	controllerName := fmt.Sprintf("%v-%v", k8s.ControllerManagerNamePrefix, randomid.New().String())
   160  	return &unstructured.Unstructured{
   161  		Object: map[string]interface{}{
   162  			"apiVersion": "apps/v1",
   163  			"kind":       "StatefulSet",
   164  			"metadata": map[string]interface{}{
   165  				"labels": map[string]interface{}{
   166  					k8s.KCCComponentLabel:    k8s.ControllerManagerNamePrefix,
   167  					k8s.ScopedNamespaceLabel: namespace,
   168  				},
   169  				"namespace": k8s.SystemNamespace,
   170  				"name":      controllerName,
   171  			},
   172  			"spec": map[string]interface{}{
   173  				"selector": map[string]interface{}{
   174  					"matchLabels": map[string]interface{}{
   175  						k8s.KCCComponentLabel:    k8s.ControllerManagerNamePrefix,
   176  						k8s.ScopedNamespaceLabel: namespace,
   177  					},
   178  				},
   179  				"serviceName": controllerName,
   180  				"template": map[string]interface{}{
   181  					"metadata": map[string]interface{}{
   182  						"labels": map[string]interface{}{
   183  							k8s.KCCComponentLabel:    k8s.ControllerManagerNamePrefix,
   184  							k8s.ScopedNamespaceLabel: namespace,
   185  						},
   186  					},
   187  				},
   188  			},
   189  		},
   190  	}
   191  }
   192  
   193  func getCurrentCondition(ctx context.Context, c client.Client, u *unstructured.Unstructured) (condition v1alpha1.Condition, found bool, err error) {
   194  	nn := k8s.GetNamespacedName(u)
   195  	unstruct := &unstructured.Unstructured{}
   196  	unstruct.SetGroupVersionKind(u.GroupVersionKind())
   197  	if err := c.Get(ctx, nn, unstruct); err != nil {
   198  		return v1alpha1.Condition{}, false, fmt.Errorf("error getting resource from API server: %v", err)
   199  	}
   200  	resource, err := k8s.NewResource(unstruct)
   201  	if err != nil {
   202  		return v1alpha1.Condition{}, false, fmt.Errorf("error marhsalling unstruct to k8s resource: %v", err)
   203  	}
   204  	condition, found = k8s.GetReadyCondition(resource)
   205  	return condition, found, nil
   206  }
   207  
   208  func TestMain(m *testing.M) {
   209  	testmain.TestMainForUnitTestsWithCRDs(m, []*apiextensions.CustomResourceDefinition{fakeCRD}, &mgr)
   210  }
   211
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