feat: add benchmark and skipping features example

examples/benchmark_tests/README.md

@@ -0,0 +1,42 @@
+# Benchmark tests and skipping features
+
+This directory contains the example of:
+- how to run **without test features**, and use your preferred `testing` package (standard library and testify included in example)
+  * When skipping features, you will not receive any benefit from the `features` related setup or teardown `envfuncs`, but you will still be able to access a kubernetes config (`envconfig`) to create a client that has access to the expected test cluster.
+- how to run Go **Test Benchmarks**, e.g. via `go test -bench=.`
+
+# Skipping features
+
+```go
+func BenchmarkListPods(b *testing.B) {
+	client, err := testenv.EnvConf().NewClient()
+	// ...your client is ready you use -- or use the `*rest.Config` to create your preferred client
+}
+
+func TestListPods(t *testing.T) {
+	client, err := testenv.EnvConf().NewClient()
+	// ...
+}
+```
+
+
+# Run Tests with flags
+
+These test cases can be executed using the normal `go test -bench=-` command by passing the right arguments
+
+```bash
+go test -bench=. -v .
+```
+
+With the output generated as following.
+
+```bash
+goos: <YOUR_OS>
+goarch: <YOUR_ARCH>
+pkg: sigs.k8s.io/e2e-framework/examples/benchmark_tests
+cpu: <YOUR_CPU_TYPE>
+BenchmarkListPods
+BenchmarkListPods-12    	     100	 180148936 ns/op
+PASS
+ok  	sigs.k8s.io/e2e-framework/examples/benchmark_tests	47.880s
+```

examples/benchmark_tests/benchmark_test.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2024 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.
+*/
+
+package benchmark_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	corev1 "k8s.io/api/core/v1"
+)
+
+func BenchmarkListPods(b *testing.B) {
+	client, err := testenv.EnvConf().NewClient()
+	require.NoError(b, err)
+	var pods corev1.PodList
+	for n := 0; n < b.N; n++ {
+		err = client.Resources("kube-system").List(context.TODO(), &pods)
+		require.NoError(b, err)
+	}
+}

examples/benchmark_tests/example_test.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2024 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.
+*/
+
+package benchmark_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	corev1 "k8s.io/api/core/v1"
+)
+
+func TestListPods(t *testing.T) {
+	client, err := testenv.EnvConf().NewClient()
+	require.NoError(t, err)
+	var pods corev1.PodList
+	err = client.Resources("kube-system").List(context.TODO(), &pods)
+	require.NoError(t, err)
+}

examples/benchmark_tests/main_test.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2024 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.
+*/
+
+package benchmark_test
+
+import (
+	"context"
+	"os"
+	"testing"
+	"time"
+
+	"sigs.k8s.io/e2e-framework/pkg/env"
+	"sigs.k8s.io/e2e-framework/pkg/envconf"
+	"sigs.k8s.io/e2e-framework/support/kind"
+)
+
+var testenv env.Environment
+
+func TestMain(m *testing.M) {
+	testenv = env.New()
+	testenv.Setup(
+		// Step: creates kind cluster, propagate kind cluster object
+		func(ctx context.Context, cfg *envconf.Config) (context.Context, error) {
+			name := envconf.RandomName("my-cluster", 16)
+			cluster := kind.NewCluster(name)
+			kubeconfig, err := cluster.Create(ctx)
+			if err != nil {
+				return ctx, err
+			}
+			// stall a bit to allow most pods to come up
+			time.Sleep(time.Second * 10)
+
+			// update environment with kubecofig file
+			cfg.WithKubeconfigFile(kubeconfig)
+			// propagate cluster value
+			return context.WithValue(ctx, 1, cluster), nil
+		},
+	).Finish(
+		// Teardown func: delete kind cluster
+		func(ctx context.Context, cfg *envconf.Config) (context.Context, error) {
+			cluster := ctx.Value(1).(*kind.Cluster) // nil should be tested
+			if err := cluster.Destroy(ctx); err != nil {
+				return ctx, err
+			}
+			return ctx, nil
+		},
+	)
+
+	os.Exit(testenv.Run(m))
+}

go.mod

@@ -3,6 +3,7 @@ module sigs.k8s.io/e2e-framework
 go 1.22.3
 
 require (
+	github.com/stretchr/testify v1.9.0
 	github.com/vladimirvivien/gexe v0.4.0
 	k8s.io/api v0.31.2
 	k8s.io/apimachinery v0.31.2
@@ -41,6 +42,7 @@ require (
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/mxk/go-flowrate v0.0.0-20140419014527-cca7078d478f // indirect
 	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/client_golang v1.19.1 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.55.0 // indirect