impemented mock testing

tests/common/fakesys.rs

@@ -0,0 +1,55 @@
+use std::fs;
+use std::path::PathBuf;
+use tempfile::TempDir;
+
+pub struct FakeSysBuilder {
+    temp_dir: TempDir,
+}
+
+impl FakeSysBuilder {
+    pub fn new() -> Self {
+        Self {
+            temp_dir: TempDir::new().expect("Failed to create temporary directory"),
+        }
+    }
+
+    pub fn base_path(&self) -> PathBuf {
+        self.temp_dir.path().to_path_buf()
+    }
+
+    pub fn add_dmi(&self, vendor: &str, product: &str) -> &Self {
+        let dmi_path = self.base_path().join("sys/class/dmi/id");
+        fs::create_dir_all(&dmi_path).expect("Failed to create DMI directory");
+        
+        fs::write(dmi_path.join("sys_vendor"), vendor).expect("Failed to write sys_vendor");
+        fs::write(dmi_path.join("product_name"), product).expect("Failed to write product_name");
+        self
+    }
+
+    pub fn add_hwmon(&self, name: &str, temp_label: &str, temp_input: &str) -> &Self {
+        let hwmon_path = self.base_path().join("sys/class/hwmon/hwmon0");
+        fs::create_dir_all(&hwmon_path).expect("Failed to create hwmon directory");
+        
+        fs::write(hwmon_path.join("name"), name).expect("Failed to write hwmon name");
+        fs::write(hwmon_path.join("temp1_label"), temp_label).expect("Failed to write temp label");
+        fs::write(hwmon_path.join("temp1_input"), temp_input).expect("Failed to write temp input");
+        self
+    }
+
+    pub fn add_rapl(&self, name: &str, energy_uj: &str, pl1_uw: &str) -> &Self {
+        let rapl_path = self.base_path().join("sys/class/powercap/intel-rapl:0");
+        fs::create_dir_all(&rapl_path).expect("Failed to create RAPL directory");
+        
+        fs::write(rapl_path.join("name"), name).expect("Failed to write RAPL name");
+        fs::write(rapl_path.join("energy_uj"), energy_uj).expect("Failed to write energy_uj");
+        fs::write(rapl_path.join("constraint_0_power_limit_uw"), pl1_uw).expect("Failed to write pl1_uw");
+        self
+    }
+
+    pub fn add_proc_cmdline(&self, cmdline: &str) -> &Self {
+        let proc_path = self.base_path().join("proc");
+        fs::create_dir_all(&proc_path).expect("Failed to create proc directory");
+        fs::write(proc_path.join("cmdline"), cmdline).expect("Failed to write cmdline");
+        self
+    }
+}