codex: stabilize app-server-protocol codegen tests (#13534)

codex-rs/.config/nextest.toml

@@ -2,6 +2,9 @@
 # Do not increase, fix your test instead
 slow-timeout = { period = "15s", terminate-after = 2 }
 
+[test-groups.app_server_protocol_codegen]
+max-threads = 1
+
 
 [[profile.default.overrides]]
 # Do not add new tests here
@@ -11,3 +14,7 @@ slow-timeout = { period = "1m", terminate-after = 4 }
 [[profile.default.overrides]]
 filter = 'test(approval_matrix_covers_all_modes)'
 slow-timeout = { period = "30s", terminate-after = 2 }
+
+[[profile.default.overrides]]
+filter = 'package(codex-app-server-protocol) & (test(schema_fixtures_match_generated) | test(generate_ts_with_experimental_api_retains_experimental_entries) | test(generated_ts_optional_nullable_fields_only_in_params) | test(generate_json_filters_experimental_fields_and_methods))'
+test-group = 'app_server_protocol_codegen'

codex-rs/app-server-protocol/tests/schema_fixtures.rs

@@ -4,15 +4,41 @@ use codex_app_server_protocol::read_schema_fixture_tree;
 use codex_app_server_protocol::write_schema_fixtures;
 use similar::TextDiff;
 use std::path::Path;
+use std::time::Instant;
 
 #[test]
 fn schema_fixtures_match_generated() -> Result<()> {
+    let start = Instant::now();
     let schema_root = schema_root()?;
+    eprintln!(
+        "[schema_fixtures] resolved schema root in {:?}: {}",
+        start.elapsed(),
+        schema_root.display()
+    );
+
+    let fixture_read_start = Instant::now();
     let fixture_tree = read_tree(&schema_root)?;
+    eprintln!(
+        "[schema_fixtures] read {} vendored files in {:?}",
+        fixture_tree.len(),
+        fixture_read_start.elapsed()
+    );
 
     let temp_dir = tempfile::tempdir().context("create temp dir")?;
+    let generate_start = Instant::now();
     write_schema_fixtures(temp_dir.path(), None).context("generate schema fixtures")?;
+    eprintln!(
+        "[schema_fixtures] generated schema fixtures in {:?}",
+        generate_start.elapsed()
+    );
+
+    let generated_read_start = Instant::now();
     let generated_tree = read_tree(temp_dir.path())?;
+    eprintln!(
+        "[schema_fixtures] read {} generated files in {:?}",
+        generated_tree.len(),
+        generated_read_start.elapsed()
+    );
 
     let fixture_paths = fixture_tree
         .keys()
@@ -60,6 +86,12 @@ Run `just write-app-server-schema` to overwrite with your changes.\n\n{diff}",
         );
     }
 
+    eprintln!(
+        "[schema_fixtures] compared {} files in {:?}",
+        fixture_tree.len(),
+        start.elapsed()
+    );
+
     Ok(())
 }