refoctor: ssh logic (#194)

* feat: optimize ssh

pkg/daemon/handler/ssh_test.go

@@ -0,0 +1,49 @@
+package handler
+
+import "testing"
+
+func TestGetVersionFromOutput(t *testing.T) {
+	tests := []struct {
+		output  string
+		version string
+	}{
+		{
+			output: `KubeVPN: CLI
+    Version: v2.2.3
+    DaemonVersion: v2.2.3
+    Image: docker.io/naison/kubevpn:v2.2.3
+    Branch: feat/ssh-heartbeat
+    Git commit: 1272e86a337d3075427ee3a1c3681d378558d133
+    Built time: 2024-03-08 17:14:49
+    Built OS/Arch: darwin/arm64
+    Built Go version: go1.20.5`,
+			version: "v2.2.3",
+		},
+		{
+			output: `KubeVPN: CLI
+    Version: v2.2.3
+    DaemonVersion: unknown
+    Image: docker.io/naison/kubevpn:v2.2.3
+    Branch: feat/ssh-heartbeat
+    Git commit: 1272e86a337d3075427ee3a1c3681d378558d133
+    Built time: 2024-03-08 17:14:49
+    Built OS/Arch: darwin/arm64
+    Built Go version: go1.20.5`,
+			version: "unknown",
+		},
+		{
+			output:  "hello",
+			version: "",
+		},
+		{
+			output:  "",
+			version: "",
+		},
+	}
+	for _, test := range tests {
+		version := getDaemonVersionFromOutput([]byte(test.output))
+		if version != test.version {
+			t.Failed()
+		}
+	}
+}