add failing compliance test for SHELL canonicalization

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

@@ -67,6 +67,21 @@ echo $0";
     Ok(())
 }
 
+#[test]
+fn shell_is_canonicalized() -> Result<()> {
+    let shell_path = "/bin/bash";
+    let env = Env("ALL ALL=(ALL:ALL) NOPASSWD: /usr/bin/bash")
+        .build()?;
+
+    Command::new("env")
+        .arg(format!("SHELL={shell_path}"))
+        .args(["sudo", "-s", "true"])
+        .output(&env)?
+        .stdout()?;
+
+    Ok(())
+}
+
 #[test]
 fn argument_is_invoked_with_dash_c_flag() -> Result<()> {
     let shell_path = "/root/my-shell";