add extra compliance test

Author: squell

test-framework/sudo-compliance-tests/src/sudo/flag_preserve_environment.rs

@@ -3,7 +3,7 @@ use sudo_test::{Command, Env};
 use crate::{helpers, SUDOERS_ALL_ALL_NOPASSWD};
 
 #[test]
-fn var_is_preserved() {
+fn env_var_is_preserved() {
     let name = "SHOULD_BE_PRESERVED";
     let value = "42";
     let env = Env([SUDOERS_ALL_ALL_NOPASSWD, "Defaults setenv"]).build();
@@ -18,6 +18,30 @@ fn var_is_preserved() {
     assert_eq!(Some(value), sudo_env.get(name).copied());
 }
 
+#[test]
+fn preserve_and_env_var_can_coexist() {
+    let name = "SHOULD_BE_PRESERVED";
+    let value = "42";
+    let other_name = "ALSO_PRESERVED";
+    let other_value = "37";
+    let env = Env([SUDOERS_ALL_ALL_NOPASSWD, "Defaults setenv"]).build();
+
+    let stdout = Command::new("env")
+        .arg(format!("{name}={value}"))
+        .arg(format!("{other_name}={other_value}"))
+        .args([
+            "sudo",
+            &format!("{name}={value}"),
+            &format!("--preserve-env={other_name}"),
+            "env",
+        ])
+        .output(&env)
+        .stdout();
+    let sudo_env = helpers::parse_env_output(&stdout);
+
+    assert_eq!(Some(value), sudo_env.get(name).copied());
+    assert_eq!(Some(other_value), sudo_env.get(other_name).copied());
+}
 #[test]
 fn env_var_overrides_preserve() {
     let name = "SHOULD_BE_PRESERVED";