fix err to append env value to default

Signed-off-by: sat0ken <[email protected]>

tests/contest/contest/src/tests/process/process_test.rs

@@ -8,18 +8,21 @@ use test_framework::{test_result, Test, TestGroup, TestResult};
 use crate::utils::test_inside_container;
 
 fn create_spec() -> Result<Spec> {
-    let mut spec = SpecBuilder::default()
-        .process(
-            ProcessBuilder::default()
-                .args(vec!["runtimetest".to_string(), "process".to_string()])
-                .cwd("/test")
-                .build()
-                .expect("error in creating process config"),
-        )
+    let mut process = ProcessBuilder::default()
+        .args(vec!["runtimetest".to_string(), "process".to_string()])
+        .cwd("/test")
+        .build()
+        .expect("error in creating process config");
+    let mut env = process.env().clone().unwrap();
+    env.push("testa=valuea".to_string());
+    env.push("testb=123".to_string());
+    process.set_env(Some(env));
+
+    let spec = SpecBuilder::default()
+        .process(process)
         .build()
         .context("failed to build spec")?;
-    spec.process()
-        .set_env(vec!["testa=valuea".into(), "testb=123".into()]);
+
     Ok(spec)
 }