Add crictl config e2e tests

Signed-off-by: Sascha Grunert <sgrunert@redhat.com>

test/e2e/config_test.go

@@ -0,0 +1,90 @@
+/*
+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 e2e
+
+import (
+	"os"
+
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	. "github.com/onsi/gomega/gexec"
+)
+
+var _ = t.Describe("config", func() {
+	var configFile *os.File
+
+	BeforeEach(func() {
+		var err error
+		configFile, err = os.CreateTemp("", "crictl-*.yaml")
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	AfterEach(func() {
+		Expect(os.RemoveAll(configFile.Name())).NotTo(HaveOccurred())
+	})
+
+	listConfig := func() string {
+		res := t.Crictl("--config " + configFile.Name() + " config --list")
+		Expect(res).To(Exit(0))
+		return string(res.Out.Contents())
+	}
+
+	It("should succeed to list with empty config", func() {
+		cfg := listConfig()
+		Expect(cfg).To(ContainSubstring("runtime-endpoint"))
+		Expect(cfg).To(ContainSubstring("image-endpoint"))
+		Expect(cfg).To(MatchRegexp("timeout .* 0"))
+		Expect(cfg).To(MatchRegexp("debug .* false"))
+		Expect(cfg).To(MatchRegexp("pull-image-on-create .* false"))
+		Expect(cfg).To(MatchRegexp("disable-pull-on-run .* false"))
+	})
+
+	It("should succeed to set config values", func() {
+		t.CrictlExpectSuccess("--config "+configFile.Name()+" config --set runtime-endpoint=foo,timeout=10", "")
+
+		cfg := listConfig()
+		Expect(cfg).To(MatchRegexp("runtime-endpoint .* foo"))
+		Expect(cfg).To(MatchRegexp("timeout .* 10"))
+	})
+
+	It("should succeed to set config values and preserve comments", func() {
+		_, err := configFile.WriteString(`
+runtime-endpoint: "foo"
+image-endpoint: "bar" # an inline comment
+timeout: 5
+
+# comment below a newline
+debug: true
+`)
+		Expect(err).NotTo(HaveOccurred())
+
+		t.CrictlExpectSuccess("--config "+configFile.Name()+" config --set runtime-endpoint=bar,image-endpoint=baz,timeout=10,debug=false", "")
+
+		cfgContent, err := os.ReadFile(configFile.Name())
+		Expect(err).NotTo(HaveOccurred())
+
+		Expect(string(cfgContent)).To(Equal(
+			`runtime-endpoint: "bar"
+image-endpoint: "baz" # an inline comment
+timeout: 10
+# comment below a newline
+debug: false
+pull-image-on-create: false
+disable-pull-on-run: false
+`))
+	})
+})