(kubectl events): Add integration tests

This PR adds integration tests for `kubectl alpha events`

test/cmd/events.sh

@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+
+# Copyright 2022 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# Runs tests for kubectl diff
+run_kubectl_events_tests() {
+    set -o nounset
+    set -o errexit
+
+    create_and_use_new_namespace
+    kube::log::status "Testing kubectl events"
+
+    ### Create a new namespace
+    # Pre-condition: the test-events namespace does not exist
+    kube::test::get_object_assert 'namespaces' "{{range.items}}{{ if eq ${id_field:?} \\\"test-events\\\" }}found{{end}}{{end}}:" ':'
+    # Command
+    kubectl create namespace test-events
+    # Post-condition: namespace 'test-events' is created.
+    kube::test::get_object_assert 'namespaces/test-events' "{{$id_field}}" 'test-events'
+
+    # Pre-condition: event does not exist for Cronjob/pi in any namespace
+    output_message=$(kubectl alpha events -A "${kube_flags[@]:?}" 2>&1)
+    kube::test::if_has_not_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"
+
+    # Pre-condition: cronjob does not exist in test-events namespace
+    kube::test::get_object_assert 'cronjob --namespace=test-events' "{{range.items}}{{ if eq $id_field \\\"pi\\\" }}found{{end}}{{end}}:" ':'
+    ### Create a cronjob in a specific namespace
+    kubectl create cronjob pi --schedule="59 23 31 2 *" --namespace=test-events "--image=$IMAGE_PERL" -- perl -Mbignum=bpi -wle 'print bpi(20)' "${kube_flags[@]:?}"
+    # Post-Condition: assertion object exists
+    kube::test::get_object_assert 'cronjob/pi --namespace=test-events' "{{$id_field}}" 'pi'
+
+    # Post-Condition: events --all-namespaces returns event for Cronjob/pi
+    output_message=$(kubectl alpha events -A "${kube_flags[@]:?}" 2>&1)
+    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"
+
+    # Post-Condition: events for test-events namespace returns event for Cronjob/pi
+    output_message=$(kubectl alpha events -n test-events "${kube_flags[@]:?}" 2>&1)
+    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"
+
+    # Post-Condition: events returns event for Cronjob/pi when --for flag is used
+    output_message=$(kubectl alpha events -n test-events --for=Cronjob/pi "${kube_flags[@]:?}" 2>&1)
+    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"
+
+    # Post-Condition: events returns event for Cronjob/pi when watch is enabled
+    output_message=$(kubectl alpha events -n test-events --for=Cronjob/pi --watch --request-timeout=1 "${kube_flags[@]:?}" 2>&1)
+    kube::test::if_has_string "${output_message}" "Warning" "InvalidSchedule" "Cronjob/pi"
+
+    #Clean up
+    kubectl delete cronjob pi --namespace=test-events
+    kubectl delete namespace test-events
+
+    set +o nounset
+    set +o errexit
+}

test/cmd/legacy-script.sh

@@ -41,6 +41,7 @@ source "${KUBE_ROOT}/test/cmd/debug.sh"
 source "${KUBE_ROOT}/test/cmd/delete.sh"
 source "${KUBE_ROOT}/test/cmd/diff.sh"
 source "${KUBE_ROOT}/test/cmd/discovery.sh"
+source "${KUBE_ROOT}/test/cmd/events.sh"
 source "${KUBE_ROOT}/test/cmd/exec.sh"
 source "${KUBE_ROOT}/test/cmd/generic-resources.sh"
 source "${KUBE_ROOT}/test/cmd/get.sh"
@@ -84,6 +85,7 @@ PATH="${KUBE_OUTPUT_HOSTBIN}":$PATH
 clusterroles="clusterroles"
 configmaps="configmaps"
 csr="csr"
+cronjob="cronjobs"
 deployments="deployments"
 namespaces="namespaces"
 nodes="nodes"
@@ -553,6 +555,14 @@ runTests() {
     record_command run_kubectl_get_tests
   fi
 
+  ##################
+  # Kubectl events #
+  ##################
+
+  if kube::test::if_supports_resource "${cronjob}" ; then
+    record_command run_kubectl_events_tests
+  fi
+
   ################
   # Kubectl exec #
   ################