test/e2e/karmadactl_test.go: test version command

In this commit, we test `karmadactl version` command to
make sure it return valid information and return error
when invalid flag is provided.

Signed-off-by: Mohamed Awnallah <mohamedmohey2352@gmail.com>

test/e2e/karmadactl_test.go

@@ -610,3 +610,24 @@ var _ = ginkgo.Describe("Karmadactl top testing", ginkgo.Labels{NeedCreateCluste
 		})
 	})
 })
+
+var _ = ginkgo.Describe("Karmadactl version testing", func() {
+	ginkgo.Context("Test karmadactl version command", func() {
+		ginkgo.It("should return the version information successfully", func() {
+			cmd := framework.NewKarmadactlCommand(kubeconfig, "", karmadactlPath, "", karmadactlTimeout, "version")
+			output, err := cmd.ExecOrDie()
+			gomega.Expect(err).ShouldNot(gomega.HaveOccurred())
+			gomega.Expect(strings.Contains(output, "karmadactl version")).Should(gomega.BeTrue())
+			gomega.Expect(strings.Contains(output, "GitVersion")).Should(gomega.BeTrue())
+			gomega.Expect(strings.Contains(output, "GoVersion")).Should(gomega.BeTrue())
+			gomega.Expect(strings.Contains(output, "Platform")).Should(gomega.BeTrue())
+		})
+
+		ginkgo.It("should return error for invalid flag", func() {
+			cmd := framework.NewKarmadactlCommand(kubeconfig, "", karmadactlPath, "", karmadactlTimeout, "version", "--invalidflag")
+			_, err := cmd.ExecOrDie()
+			gomega.Expect(err).Should(gomega.HaveOccurred())
+			gomega.Expect(strings.Contains(err.Error(), "unknown flag: --invalidflag")).Should(gomega.BeTrue())
+		})
+	})
+})