Merge pull request #1297 from kaisoz/add-k8s-events-support

Add support for Events in k8s module

modules/k8s/event.go

@@ -0,0 +1,34 @@
+package k8s
+
+import (
+	"context"
+
+	"github.com/stretchr/testify/require"
+
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+
+	"github.com/gruntwork-io/terratest/modules/testing"
+)
+
+// ListEvents will retrieve the Events in the given namespace that match the given filters and return them. This will fail the
+// test if there is an error.
+func ListEvents(t testing.TestingT, options *KubectlOptions, filters metav1.ListOptions) []corev1.Event {
+	events, err := ListEventsE(t, options, filters)
+	require.NoError(t, err)
+	return events
+}
+
+// ListEventsE will retrieve the Events that match the given filters and return them.
+func ListEventsE(t testing.TestingT, options *KubectlOptions, filters metav1.ListOptions) ([]corev1.Event, error) {
+	clientset, err := GetKubernetesClientFromOptionsE(t, options)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := clientset.CoreV1().Events(options.Namespace).List(context.Background(), filters)
+	if err != nil {
+		return nil, err
+	}
+	return resp.Items, nil
+}

modules/k8s/event_test.go

@@ -0,0 +1,50 @@
+//go:build kubernetes
+// +build kubernetes
+
+// NOTE: we have build tags to differentiate kubernetes tests from non-kubernetes tests. This is done because minikube
+// is heavy and can interfere with docker related tests in terratest. Specifically, many of the tests start to fail with
+// `connection refused` errors from `minikube`. To avoid overloading the system, we run the kubernetes tests and helm
+// tests separately from the others. This may not be necessary if you have a sufficiently powerful machine.  We
+// recommend at least 4 cores and 16GB of RAM if you want to run all the tests together.
+
+package k8s
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	_ "k8s.io/client-go/plugin/pkg/client/auth"
+)
+
+func TestListEventsEReturnsNilErrorWhenListingEvents(t *testing.T) {
+	t.Parallel()
+
+	options := NewKubectlOptions("", "", "kube-system")
+	events, err := ListEventsE(t, options, v1.ListOptions{})
+	require.Nil(t, err)
+	require.Greater(t, len(events), 0)
+}
+
+func TestListEventsInNamespace(t *testing.T) {
+	t.Parallel()
+
+	options := NewKubectlOptions("", "", "kube-system")
+	events := ListEvents(t, options, v1.ListOptions{})
+	require.Greater(t, len(events), 0)
+}
+
+func TestListEventsReturnsZeroEventsIfNoneCreated(t *testing.T) {
+	t.Parallel()
+	ns := "test-ns"
+
+	options := NewKubectlOptions("", "", "")
+
+	defer DeleteNamespace(t, options, ns)
+	CreateNamespace(t, options, ns)
+
+	options.Namespace = ns
+	events := ListEvents(t, options, v1.ListOptions{})
+	require.Equal(t, 0, len(events))
+}