Adding Opkg support for system interactions

system.go

@@ -28,8 +28,7 @@ func NewSystemWithExecutor(exec Executor) *System {
 }
 
 // sysRun, private method to run the UCI command
-func (s *System) sysRun(param ...string) *SysAction {
+func (s *System) sysRun(cmd string, param ...string) *SysAction {
-	cmd := param[0]
 	res := s.exec.Run(cmd, param...)
 	return &SysAction{res, fmt.Sprintf("%s %s", cmd, param)}
 }
@@ -39,3 +38,9 @@ func (s *System) Service(name string, action string) *SysAction {
 	cmd := fmt.Sprintf("/etc/init.d/%s", name)
 	return s.sysRun(cmd, action)
 }
+
+// Opkg provides an interface to system command opkg
+// useful for package installation or system update
+func (s *System) Opkg(params ...string) *SysAction {
+	return s.sysRun("opkg", params...)
+}

system_test.go

@@ -21,3 +21,33 @@ func TestService(t *testing.T) {
 		t.Error("Stderr is not empty ...")
 	}
 }
+
+func TestOpkg(t *testing.T) {
+	exec := createMockExecutor("", "", 0)
+	sys := NewSystemWithExecutor(exec)
+	res := sys.Opkg("update")
+	if res.ReturnCode != 0 {
+		t.Error("Bad Return Code !")
+	}
+	if res.Stdout != "" {
+		fmt.Printf("[%s] - ", res.Stdout)
+		t.Error("Stdout is not empty ...")
+	}
+	if res.Stderr != "" {
+		fmt.Printf("[%s] - ", res.Stdout)
+		t.Error("Stderr is not empty ...")
+	}
+
+	res = sys.Opkg("install", "ip")
+	if res.ReturnCode != 0 {
+		t.Error("Bad Return Code !")
+	}
+	if res.Stdout != "" {
+		fmt.Printf("[%s] - ", res.Stdout)
+		t.Error("Stdout is not empty ...")
+	}
+	if res.Stderr != "" {
+		fmt.Printf("[%s] - ", res.Stdout)
+		t.Error("Stderr is not empty ...")
+	}
+}