Add test to verify volume/volumemount order is deterministic

This test is to verify that the order of volume and volumemounts.
Without the sort that was added in the previous commit, the order
is not deterministic and this test would thus fail some of the time
without sorting.

controllers/eventsource/resource_test.go

@@ -120,6 +120,93 @@ func Test_BuildDeployment(t *testing.T) {
 		assert.True(t, hasTLSSecretVolume)
 		assert.True(t, hasTLSSecretVolumeMount)
 	})
+
+	t.Run("test secret volume and volumemount order deterministic", func(t *testing.T) {
+		args := &AdaptorArgs{
+			Image:       testImage,
+			EventSource: testEventSource,
+			Labels:      testLabels,
+		}
+
+		webhooksWithSecrets := map[string]v1alpha1.WebhookEventSource{
+			"webhook4": {
+				WebhookContext: v1alpha1.WebhookContext{
+					URL:      "http://a.b",
+					Endpoint: "/webhook4",
+					Port:     "1234",
+					AuthSecret: &corev1.SecretKeySelector{
+						LocalObjectReference: corev1.LocalObjectReference{Name: "webhook4"},
+						Key:                  "secret",
+					},
+				},
+			},
+			"webhook3": {
+				WebhookContext: v1alpha1.WebhookContext{
+					URL:      "http://a.b",
+					Endpoint: "/webhook3",
+					Port:     "1234",
+					AuthSecret: &corev1.SecretKeySelector{
+						LocalObjectReference: corev1.LocalObjectReference{Name: "webhook3"},
+						Key:                  "secret",
+					},
+				},
+			},
+			"webhook1": {
+				WebhookContext: v1alpha1.WebhookContext{
+					URL:      "http://a.b",
+					Endpoint: "/webhook1",
+					Port:     "1234",
+					AuthSecret: &corev1.SecretKeySelector{
+						LocalObjectReference: corev1.LocalObjectReference{Name: "webhook1"},
+						Key:                  "secret",
+					},
+				},
+			},
+			"webhook2": {
+				WebhookContext: v1alpha1.WebhookContext{
+					URL:      "http://a.b",
+					Endpoint: "/webhook2",
+					Port:     "1234",
+					AuthSecret: &corev1.SecretKeySelector{
+						LocalObjectReference: corev1.LocalObjectReference{Name: "webhook2"},
+						Key:                  "secret",
+					},
+				},
+			},
+		}
+		args.EventSource.Spec.Webhook = webhooksWithSecrets
+
+		wantVolumeNames := []string{"auth-volume", "cm-test-cm", "secret-test-secret", "secret-webhook1", "secret-webhook2", "secret-webhook3", "secret-webhook4", "tmp"}
+		wantVolumeMountNames := []string{"auth-volume", "cm-test-cm", "secret-test-secret", "secret-webhook1", "secret-webhook2", "secret-webhook3", "secret-webhook4", "tmp"}
+
+		deployment, err := buildDeployment(args, fakeEventBus)
+		assert.Nil(t, err)
+		assert.NotNil(t, deployment)
+		gotVolumes := deployment.Spec.Template.Spec.Volumes
+		gotVolumeMounts := deployment.Spec.Template.Spec.Containers[0].VolumeMounts
+
+		var gotVolumeNames []string
+		var gotVolumeMountNames []string
+
+		for _, v := range gotVolumes {
+			gotVolumeNames = append(gotVolumeNames, v.Name)
+		}
+		for _, v := range gotVolumeMounts {
+			gotVolumeMountNames = append(gotVolumeMountNames, v.Name)
+		}
+
+		assert.Equal(t, len(gotVolumes), len(wantVolumeNames))
+		assert.Equal(t, len(gotVolumeMounts), len(wantVolumeMountNames))
+
+		for i := range gotVolumeNames {
+			assert.Equal(t, gotVolumeNames[i], wantVolumeNames[i])
+		}
+		for i := range gotVolumeMountNames {
+			assert.Equal(t, gotVolumeMountNames[i], wantVolumeMountNames[i])
+		}
+
+		assert.Equal(t, deployment.Spec.Template.Spec.PriorityClassName, "test-class")
+	})
 }
 
 func TestResourceReconcile(t *testing.T) {