Adding unit tests for System

system_test.go

@@ -0,0 +1,23 @@
+package owrt
+
+import (
+	"fmt"
+	"testing"
+)
+
+func TestService(t *testing.T) {
+	exec := createMockExecutor("", "", 0)
+	sys := NewSystemWithExecutor(exec)
+	res := sys.Service("network", "start")
+	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 ...")
+	}
+}