Add integration tests for exchange controller

controllers/exchange_controller_test.go

@@ -0,0 +1,218 @@
+package controllers_test
+
+import (
+	"bytes"
+	"errors"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+	. "github.com/onsi/gomega/gstruct"
+	topology "github.com/rabbitmq/messaging-topology-operator/api/v1alpha2"
+	corev1 "k8s.io/api/core/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/types"
+)
+
+var _ = Describe("exchange-controller", func() {
+	var exchange topology.Exchange
+	var exchangeName string
+
+	JustBeforeEach(func() {
+		exchange = topology.Exchange{
+			ObjectMeta: metav1.ObjectMeta{
+				Name:      exchangeName,
+				Namespace: "default",
+			},
+			Spec: topology.ExchangeSpec{
+				RabbitmqClusterReference: topology.RabbitmqClusterReference{
+					Name: "example-rabbit",
+				},
+			},
+		}
+	})
+
+	Context("creation", func() {
+		When("the RabbitMQ Client returns a HTTP error response", func() {
+			BeforeEach(func() {
+				exchangeName = "test-http-error"
+				fakeRabbitMQClient.DeclareExchangeReturns(&http.Response{
+					Status:     "418 I'm a teapot",
+					StatusCode: 418,
+				}, errors.New("a failure"))
+			})
+
+			It("sets the status condition", func() {
+				Expect(client.Create(ctx, &exchange)).To(Succeed())
+				EventuallyWithOffset(1, func() []topology.Condition {
+					_ = client.Get(
+						ctx,
+						types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace},
+						&exchange,
+					)
+
+					return exchange.Status.Conditions
+				}, 10*time.Second, 1*time.Second).Should(ContainElement(MatchFields(IgnoreExtras, Fields{
+					"Type":    Equal(topology.ConditionType("Ready")),
+					"Reason":  Equal("FailedCreateOrUpdate"),
+					"Status":  Equal(corev1.ConditionFalse),
+					"Message": ContainSubstring("a failure"),
+				})))
+			})
+		})
+
+		When("the RabbitMQ Client returns a Go error response", func() {
+			BeforeEach(func() {
+				exchangeName = "test-go-error"
+				fakeRabbitMQClient.DeclareExchangeReturns(nil, errors.New("a go failure"))
+			})
+
+			It("sets the status condition to indicate a failure to reconcile", func() {
+				Expect(client.Create(ctx, &exchange)).To(Succeed())
+				EventuallyWithOffset(1, func() []topology.Condition {
+					_ = client.Get(
+						ctx,
+						types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace},
+						&exchange,
+					)
+
+					return exchange.Status.Conditions
+				}, 10*time.Second, 1*time.Second).Should(ContainElement(MatchFields(IgnoreExtras, Fields{
+					"Type":    Equal(topology.ConditionType("Ready")),
+					"Reason":  Equal("FailedCreateOrUpdate"),
+					"Status":  Equal(corev1.ConditionFalse),
+					"Message": ContainSubstring("a go failure"),
+				})))
+			})
+		})
+
+		When("success", func() {
+			BeforeEach(func() {
+				exchangeName = "test-create-success"
+				fakeRabbitMQClient.DeclareExchangeReturns(&http.Response{
+					Status:     "201 Created",
+					StatusCode: http.StatusCreated,
+				}, nil)
+			})
+
+			It("sets the status condition 'Ready' to 'true' ", func() {
+				Expect(client.Create(ctx, &exchange)).To(Succeed())
+				EventuallyWithOffset(1, func() []topology.Condition {
+					_ = client.Get(
+						ctx,
+						types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace},
+						&exchange,
+					)
+
+					return exchange.Status.Conditions
+				}, 10*time.Second, 1*time.Second).Should(ContainElement(MatchFields(IgnoreExtras, Fields{
+					"Type":   Equal(topology.ConditionType("Ready")),
+					"Reason": Equal("SuccessfulCreateOrUpdate"),
+					"Status": Equal(corev1.ConditionTrue),
+				})))
+			})
+		})
+	})
+
+	Context("deletion", func() {
+		JustBeforeEach(func() {
+			fakeRabbitMQClient.DeclareExchangeReturns(&http.Response{
+				Status:     "201 Created",
+				StatusCode: http.StatusCreated,
+			}, nil)
+			Expect(client.Create(ctx, &exchange)).To(Succeed())
+			EventuallyWithOffset(1, func() []topology.Condition {
+				_ = client.Get(
+					ctx,
+					types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace},
+					&exchange,
+				)
+
+				return exchange.Status.Conditions
+			}, 10*time.Second, 1*time.Second).Should(ContainElement(MatchFields(IgnoreExtras, Fields{
+				"Type":   Equal(topology.ConditionType("Ready")),
+				"Reason": Equal("SuccessfulCreateOrUpdate"),
+				"Status": Equal(corev1.ConditionTrue),
+			})))
+		})
+
+		When("the RabbitMQ Client returns a HTTP error response", func() {
+			BeforeEach(func() {
+				exchangeName = "delete-exchange-http-error"
+				fakeRabbitMQClient.DeleteExchangeReturns(&http.Response{
+					Status:     "502 Bad Gateway",
+					StatusCode: http.StatusBadGateway,
+					Body:       ioutil.NopCloser(bytes.NewBufferString("Hello World")),
+				}, nil)
+			})
+
+			It("publishes a 'warning' event", func() {
+				Expect(client.Delete(ctx, &exchange)).To(Succeed())
+				Consistently(func() bool {
+					err := client.Get(ctx, types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace}, &topology.Exchange{})
+					return apierrors.IsNotFound(err)
+				}, 5).Should(BeFalse())
+				Expect(observedEvents()).To(ContainElement("Warning FailedDelete failed to delete exchange"))
+			})
+		})
+
+		When("the RabbitMQ Client returns a Go error response", func() {
+			BeforeEach(func() {
+				exchangeName = "delete-go-error"
+				fakeRabbitMQClient.DeleteExchangeReturns(nil, errors.New("some error"))
+			})
+
+			It("publishes a 'warning' event", func() {
+				Expect(client.Delete(ctx, &exchange)).To(Succeed())
+				Consistently(func() bool {
+					err := client.Get(ctx, types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace}, &topology.Exchange{})
+					return apierrors.IsNotFound(err)
+				}, 5).Should(BeFalse())
+				Expect(observedEvents()).To(ContainElement("Warning FailedDelete failed to delete exchange"))
+			})
+		})
+
+		When("the RabbitMQ cluster is nil", func() {
+			BeforeEach(func() {
+				exchangeName = "delete-client-not-found-error"
+			})
+
+			JustBeforeEach(func() {
+				prepareNoSuchClusterError()
+			})
+
+			It("successfully deletes the exchange regardless", func() {
+				Expect(client.Delete(ctx, &exchange)).To(Succeed())
+				Eventually(func() bool {
+					err := client.Get(ctx, types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace}, &topology.Exchange{})
+					return apierrors.IsNotFound(err)
+				}, 5).Should(BeTrue())
+				Expect(observedEvents()).To(ContainElement("Normal SuccessfulDelete successfully deleted exchange"))
+			})
+		})
+
+		When("the RabbitMQ Client successfully deletes a exchange", func() {
+			BeforeEach(func() {
+				exchangeName = "delete-exchange-success"
+				fakeRabbitMQClient.DeleteExchangeReturns(&http.Response{
+					Status:     "204 No Content",
+					StatusCode: http.StatusNoContent,
+				}, nil)
+			})
+
+			It("publishes a normal event", func() {
+				Expect(client.Delete(ctx, &exchange)).To(Succeed())
+				Eventually(func() bool {
+					err := client.Get(ctx, types.NamespacedName{Name: exchange.Name, Namespace: exchange.Namespace}, &topology.Exchange{})
+					return apierrors.IsNotFound(err)
+				}, 5).Should(BeTrue())
+				observedEvents := observedEvents()
+				Expect(observedEvents).NotTo(ContainElement("Warning FailedDelete failed to delete exchange"))
+				Expect(observedEvents).To(ContainElement("Normal SuccessfulDelete successfully deleted exchange"))
+			})
+		})
+	})
+})