update tests for feature

Author: dylan-hurd-oai

codex-rs/core/src/shell.rs

@@ -340,7 +340,7 @@ mod detect_shell_type_tests {
 #[cfg(unix)]
 mod tests {
     use super::*;
-    use crate::powershell::UTF8_OUTPUT_PREFIX;
+    
     use std::path::PathBuf;
     use std::process::Command;
 
@@ -462,15 +462,15 @@ mod tests {
                 "pwsh.exe".to_string(),
                 "-NoProfile".to_string(),
                 "-Command".to_string(),
-                format!("{UTF8_OUTPUT_PREFIX}echo hello"),
+                format!("echo hello"),
             ]
         );
         assert_eq!(
             test_powershell_shell.derive_exec_args("echo hello", true),
             vec![
                 "pwsh.exe".to_string(),
                 "-Command".to_string(),
-                format!("{UTF8_OUTPUT_PREFIX}echo hello"),
+                format!("echo hello"),
             ]
         );
     }

codex-rs/core/tests/suite/shell_command.rs

@@ -1,4 +1,5 @@
 use anyhow::Result;
+use codex_core::features::Feature;
 use core_test_support::assert_regex_match;
 use core_test_support::responses::ev_assistant_message;
 use core_test_support::responses::ev_completed;
@@ -231,7 +232,12 @@ async fn shell_command_times_out_with_timeout_ms() -> anyhow::Result<()> {
 async fn unicode_output(login: bool) -> anyhow::Result<()> {
     skip_if_no_network!(Ok(()));
 
-    let harness = shell_command_harness_with(|builder| builder.with_model("gpt-5.1")).await?;
+    let harness = shell_command_harness_with(|builder| {
+        builder.with_model("gpt-5.2").with_config(|config| {
+            config.features.enable(Feature::PowershellUtf8);
+        })
+    })
+    .await?;
 
     let call_id = "unicode_output";
     mount_shell_responses(
@@ -255,7 +261,12 @@ async fn unicode_output(login: bool) -> anyhow::Result<()> {
 async fn unicode_output_with_newlines(login: bool) -> anyhow::Result<()> {
     skip_if_no_network!(Ok(()));
 
-    let harness = shell_command_harness_with(|builder| builder.with_model("gpt-5.1")).await?;
+    let harness = shell_command_harness_with(|builder| {
+        builder.with_model("gpt-5.2").with_config(|config| {
+            config.features.enable(Feature::PowershellUtf8);
+        })
+    })
+    .await?;
 
     let call_id = "unicode_output";
     mount_shell_responses(