Add codex debug models to show model catalog (#18625)

codex-rs/cli/tests/debug_models.rs

@@ -0,0 +1,40 @@
+use std::path::Path;
+
+use anyhow::Result;
+use tempfile::TempDir;
+
+fn codex_command(codex_home: &Path) -> Result<assert_cmd::Command> {
+    let mut cmd = assert_cmd::Command::new(codex_utils_cargo_bin::cargo_bin("codex")?);
+    cmd.env("CODEX_HOME", codex_home);
+    Ok(cmd)
+}
+
+#[test]
+fn debug_models_bundled_prints_json() -> Result<()> {
+    let codex_home = TempDir::new()?;
+    let mut cmd = codex_command(codex_home.path())?;
+    let output = cmd.args(["debug", "models", "--bundled"]).output()?;
+
+    assert!(output.status.success());
+    let stdout = String::from_utf8(output.stdout)?;
+    let value: serde_json::Value = serde_json::from_str(&stdout)?;
+    assert!(value["models"].is_array());
+    assert!(!value["models"].as_array().unwrap_or(&Vec::new()).is_empty());
+
+    Ok(())
+}
+
+#[test]
+fn debug_models_default_prints_json_without_auth() -> Result<()> {
+    let codex_home = TempDir::new()?;
+    let mut cmd = codex_command(codex_home.path())?;
+    let output = cmd.args(["debug", "models"]).output()?;
+
+    assert!(output.status.success());
+    let stdout = String::from_utf8(output.stdout)?;
+    let value: serde_json::Value = serde_json::from_str(&stdout)?;
+    assert!(value["models"].is_array());
+    assert!(!value["models"].as_array().unwrap_or(&Vec::new()).is_empty());
+
+    Ok(())
+}