test: #697 — move stdlib_io FFI coverage into behavioral tests

Moves the 155 entries from `test_ffi_surface_stdlib_io.ts` into
`@covers` annotations attached to the existing behavioral fixtures
for each surface:

- fetch / Response / Request / Headers / Blob → test_gap_fetch_response.ts
- node:stream/web → test_parity_stream_web.ts
- node:http / node:https → test_parity_http.ts
- node:net + TLS upgrade → test_net_socket.ts
- node:readline → test_parity_readline.ts
- node:worker_threads → test_parity_worker_threads.ts
- WebSocket upgrade → test_node_http_ws_upgrade.ts
- framework (multipart, request, response, server) → test_fastify_integration.ts

Regenerated via `./test-coverage/regen_ts_surface_inventory.py`:
`test_ffi_surface_stdlib_io.ts` shrinks from 155 unique FFI names to 0.
`./test-coverage/audit.sh --markdown` still reports 100% TypeScript and
combined FFI coverage (1790/1790).

Author: TheHypnoo

test-coverage/COVERAGE.md

@@ -1,13 +1,13 @@
 # Perry FFI Test Coverage
 
-Generated: 2026-05-11T17:05:37Z
+Generated: 2026-05-13T16:15:50Z
 
 ## Summary
 
-- **Total FFI functions:** 1771
-- **Covered by TypeScript fixtures:** 1771 (100.0%)
-- **Covered by Rust tests:** 1430 (80.7%)
-- **Covered by either TS or Rust:** 1771 (100.0%)
+- **Total FFI functions:** 1790
+- **Covered by TypeScript fixtures:** 1790 (100.0%)
+- **Covered by Rust tests:** 1437 (80.3%)
+- **Covered by either TS or Rust:** 1790 (100.0%)
 - **Uncovered by either TS or Rust:** 0
 
 ## Coverage by File
@@ -16,7 +16,7 @@ Generated: 2026-05-11T17:05:37Z
 |------|-------|------------|--------------|----------|-------------|-------------------|
 | `crates/perry-runtime/src/arena.rs` | 4 | 4 | 4 | 4 | 100% | 100% |
 | `crates/perry-runtime/src/arkts_callbacks.rs` | 8 | 8 | 3 | 8 | 100% | 100% |
-| `crates/perry-runtime/src/array.rs` | 74 | 74 | 74 | 74 | 100% | 100% |
+| `crates/perry-runtime/src/array.rs` | 77 | 77 | 77 | 77 | 100% | 100% |
 | `crates/perry-runtime/src/bigint.rs` | 28 | 28 | 28 | 28 | 100% | 100% |
 | `crates/perry-runtime/src/box.rs` | 3 | 3 | 0 | 3 | 100% | 100% |
 | `crates/perry-runtime/src/buffer.rs` | 77 | 77 | 77 | 77 | 100% | 100% |
@@ -41,12 +41,12 @@ Generated: 2026-05-11T17:05:37Z
 | `crates/perry-runtime/src/media_playback.rs` | 15 | 15 | 0 | 15 | 100% | 100% |
 | `crates/perry-runtime/src/net.rs` | 11 | 11 | 11 | 11 | 100% | 100% |
 | `crates/perry-runtime/src/node_stream.rs` | 6 | 6 | 1 | 6 | 100% | 100% |
-| `crates/perry-runtime/src/object.rs` | 77 | 77 | 77 | 77 | 100% | 100% |
+| `crates/perry-runtime/src/object.rs` | 80 | 80 | 80 | 80 | 100% | 100% |
 | `crates/perry-runtime/src/os.rs` | 29 | 29 | 29 | 29 | 100% | 100% |
-| `crates/perry-runtime/src/path.rs` | 13 | 13 | 6 | 13 | 100% | 100% |
+| `crates/perry-runtime/src/path.rs` | 16 | 16 | 6 | 16 | 100% | 100% |
 | `crates/perry-runtime/src/plugin.rs` | 22 | 22 | 22 | 22 | 100% | 100% |
 | `crates/perry-runtime/src/process.rs` | 4 | 4 | 0 | 4 | 100% | 100% |
-| `crates/perry-runtime/src/promise.rs` | 34 | 34 | 22 | 34 | 100% | 100% |
+| `crates/perry-runtime/src/promise.rs` | 36 | 36 | 22 | 36 | 100% | 100% |
 | `crates/perry-runtime/src/proxy.rs` | 19 | 19 | 1 | 19 | 100% | 100% |
 | `crates/perry-runtime/src/regex.rs` | 19 | 19 | 19 | 19 | 100% | 100% |
 | `crates/perry-runtime/src/set.rs` | 11 | 11 | 11 | 11 | 100% | 100% |
@@ -56,7 +56,7 @@ Generated: 2026-05-11T17:05:37Z
 | `crates/perry-runtime/src/symbol.rs` | 16 | 16 | 8 | 16 | 100% | 100% |
 | `crates/perry-runtime/src/text.rs` | 4 | 4 | 0 | 4 | 100% | 100% |
 | `crates/perry-runtime/src/thread.rs` | 5 | 5 | 3 | 5 | 100% | 100% |
-| `crates/perry-runtime/src/timer.rs` | 17 | 17 | 9 | 17 | 100% | 100% |
+| `crates/perry-runtime/src/timer.rs` | 18 | 18 | 10 | 18 | 100% | 100% |
 | `crates/perry-runtime/src/tty.rs` | 8 | 8 | 8 | 8 | 100% | 100% |
 | `crates/perry-runtime/src/tui/ffi.rs` | 32 | 32 | 30 | 32 | 100% | 100% |
 | `crates/perry-runtime/src/tui/hooks.rs` | 26 | 26 | 26 | 26 | 100% | 100% |
@@ -69,6 +69,7 @@ Generated: 2026-05-11T17:05:37Z
 | `crates/perry-runtime/src/value.rs` | 54 | 54 | 54 | 54 | 100% | 100% |
 | `crates/perry-runtime/src/watchos_game_loop.rs` | 2 | 2 | 1 | 2 | 100% | 100% |
 | `crates/perry-runtime/src/weakref.rs` | 15 | 15 | 1 | 15 | 100% | 100% |
+| `crates/perry-runtime/src/webassembly.rs` | 7 | 7 | 0 | 7 | 100% | 100% |
 | `crates/perry-stdlib/src/argon2.rs` | 5 | 5 | 2 | 5 | 100% | 100% |
 | `crates/perry-stdlib/src/async_local_storage.rs` | 6 | 6 | 5 | 6 | 100% | 100% |
 | `crates/perry-stdlib/src/axios.rs` | 8 | 8 | 8 | 8 | 100% | 100% |

test-files/test_fastify_integration.ts

@@ -26,3 +26,39 @@ app.listen({ port: port }, () => {
   // Sentinel line the harness waits for before starting curl assertions.
   console.log("ready port=" + port);
 });
+
+/*
+@covers
+crates/perry-stdlib/src/framework/multipart.rs:
+  - js_multipart_parse
+  - js_multipart_parse_with_sizes
+crates/perry-stdlib/src/framework/request.rs:
+  - js_http_request_body_length
+  - js_http_request_content_type
+  - js_http_request_has_header
+  - js_http_request_headers_all
+  - js_http_request_id
+  - js_http_request_is_method
+  - js_http_request_query_all
+  - js_http_request_query_param
+crates/perry-stdlib/src/framework/response.rs:
+  - js_http_respond_error
+  - js_http_respond_html
+  - js_http_respond_json
+  - js_http_respond_not_found
+  - js_http_respond_redirect
+  - js_http_respond_status_text
+  - js_http_respond_text
+  - js_http_respond_with_headers
+crates/perry-stdlib/src/framework/server.rs:
+  - js_http_request_body
+  - js_http_request_header
+  - js_http_request_method
+  - js_http_request_path
+  - js_http_request_query
+  - js_http_respond
+  - js_http_server_accept
+  - js_http_server_accept_v2
+  - js_http_server_close
+  - js_http_server_create
+*/

test-files/test_ffi_surface_runtime_core.ts

@@ -6,7 +6,7 @@
 // inventory into behavioral tests as each area gets deeper compatibility
 // coverage.
 //
-// Inventory entries: 915 unique FFI names, 934 declarations.
+// Inventory entries: 919 unique FFI names, 920 declarations.
 
 const testFfiSurfaceRuntimeCoreVersion = 1;
 if (testFfiSurfaceRuntimeCoreVersion !== 1) {
@@ -40,6 +40,7 @@ crates/perry-runtime/src/array.rs:
   - js_array_find_last_index
   - js_array_flat
   - js_array_flatMap
+  - js_array_flat_depth
   - js_array_forEach
   - js_array_from_f64
   - js_array_from_jsvalue
@@ -78,6 +79,8 @@ crates/perry-runtime/src/array.rs:
   - js_array_values
   - js_array_with
   - js_iterator_to_array
+  - js_tagged_template_register_raw
+  - js_template_raw
 crates/perry-runtime/src/bigint.rs:
   - js_bigint_add
   - js_bigint_and
@@ -228,7 +231,6 @@ crates/perry-runtime/src/builtins.rs:
   - js_loose_eq
   - js_lt
   - js_mod
-  - js_mul
   - js_number_coerce
   - js_number_is_finite
   - js_number_is_integer
@@ -499,12 +501,9 @@ crates/perry-runtime/src/net.rs:
   - js_net_server_address
   - js_net_server_close
   - js_net_server_listen
-  - js_net_socket_destroy
-  - js_net_socket_end
   - js_net_socket_read
   - js_net_socket_remote_address
   - js_net_socket_remote_port
-  - js_net_socket_write
 crates/perry-runtime/src/node_stream.rs:
   - js_node_stream_duplex_new
   - js_node_stream_passthrough_new
@@ -573,6 +572,7 @@ crates/perry-runtime/src/object.rs:
   - js_register_handle_method_dispatch
   - js_register_handle_property_dispatch
   - js_register_handle_property_set_dispatch
+  - js_unresolved_default_call
   - js_unresolved_namespace_stub
   - js_value_to_object
   - perry_key_content_hash
@@ -613,11 +613,14 @@ crates/perry-runtime/src/path.rs:
   - js_path_format
   - js_path_is_absolute
   - js_path_join
+  - js_path_matches_glob
   - js_path_normalize
   - js_path_parse
   - js_path_relative
   - js_path_resolve
+  - js_path_resolve_join
   - js_path_sep_get
+  - js_path_to_namespaced_path
 crates/perry-runtime/src/plugin.rs:
   - perry_plugin_count
   - perry_plugin_discover
@@ -647,9 +650,11 @@ crates/perry-runtime/src/process.rs:
 crates/perry-runtime/src/promise.rs:
   - js_array_from_async
   - js_assimilate_thenable
+  - js_async_first_call
   - js_async_step_chain
   - js_async_step_done
   - js_await_any_promise
+  - js_get_current_step_closure
   - js_is_promise
   - js_iter_result_get_done
   - js_iter_result_get_value
@@ -735,15 +740,6 @@ crates/perry-runtime/src/static_plugins.rs:
   - perry_resolve_static_plugin
 crates/perry-runtime/src/stdlib_stubs.rs:
   - js_stdlib_init_dispatch
-  - js_ws_connect
-  - js_ws_connect_start
-  - js_ws_is_open
-  - js_ws_message_count
-  - js_ws_process_pending
-  - js_ws_receive
-  - js_ws_server_close
-  - js_ws_server_new
-  - js_ws_wait_for_message
 crates/perry-runtime/src/string.rs:
   - js_atob
   - js_btoa
@@ -839,6 +835,7 @@ crates/perry-runtime/src/timer.rs:
   - js_interval_timer_tick
   - js_set_timeout
   - js_set_timeout_callback
+  - js_set_timeout_callback_args
   - js_set_timeout_value
   - js_sleep_ms
   - js_timer_has_pending
@@ -974,4 +971,12 @@ crates/perry-runtime/src/weakref.rs:
   - js_weakset_delete
   - js_weakset_has
   - js_weakset_new
+crates/perry-runtime/src/webassembly.rs:
+  - js_webassembly_call_export_0
+  - js_webassembly_call_export_1
+  - js_webassembly_call_export_2
+  - js_webassembly_call_export_3
+  - js_webassembly_call_export_4
+  - js_webassembly_instantiate
+  - js_webassembly_validate
 */

test-files/test_ffi_surface_stdlib_io.ts

@@ -6,7 +6,7 @@
 // inventory into behavioral tests as each area gets deeper compatibility
 // coverage.
 //
-// Inventory entries: 155 unique FFI names, 173 declarations.
+// Inventory entries: 0 unique FFI names, 0 declarations.
 
 const testFfiSurfaceStdlibIoVersion = 1;
 if (testFfiSurfaceStdlibIoVersion !== 1) {
@@ -16,170 +16,4 @@ console.log("test_ffi_surface_stdlib_io: ok");
 
 /*
 @covers
-crates/perry-stdlib/src/fetch.rs:
-  - js_blob_array_buffer
-  - js_blob_bytes
-  - js_blob_size
-  - js_blob_slice
-  - js_blob_stream
-  - js_blob_text
-  - js_blob_type
-  - js_fetch_get
-  - js_fetch_get_with_auth
-  - js_fetch_post
-  - js_fetch_post_with_auth
-  - js_fetch_response_count
-  - js_fetch_response_json
-  - js_fetch_response_ok
-  - js_fetch_response_status
-  - js_fetch_response_status_text
-  - js_fetch_response_text
-  - js_fetch_stream_close
-  - js_fetch_stream_poll
-  - js_fetch_stream_start
-  - js_fetch_stream_status
-  - js_fetch_text
-  - js_fetch_with_options
-  - js_headers_delete
-  - js_headers_entries
-  - js_headers_for_each
-  - js_headers_get
-  - js_headers_has
-  - js_headers_keys
-  - js_headers_new
-  - js_headers_set
-  - js_headers_values
-  - js_request_get_body
-  - js_request_get_method
-  - js_request_get_url
-  - js_request_new
-  - js_response_array_buffer
-  - js_response_blob
-  - js_response_body
-  - js_response_clone
-  - js_response_get_headers
-  - js_response_new
-  - js_response_static_json
-  - js_response_static_redirect
-crates/perry-stdlib/src/framework/multipart.rs:
-  - js_multipart_parse
-  - js_multipart_parse_with_sizes
-crates/perry-stdlib/src/framework/request.rs:
-  - js_http_request_body_length
-  - js_http_request_content_type
-  - js_http_request_has_header
-  - js_http_request_headers_all
-  - js_http_request_id
-  - js_http_request_is_method
-  - js_http_request_query_all
-  - js_http_request_query_param
-crates/perry-stdlib/src/framework/response.rs:
-  - js_http_respond_error
-  - js_http_respond_html
-  - js_http_respond_json
-  - js_http_respond_not_found
-  - js_http_respond_redirect
-  - js_http_respond_status_text
-  - js_http_respond_text
-  - js_http_respond_with_headers
-crates/perry-stdlib/src/framework/server.rs:
-  - js_http_request_body
-  - js_http_request_header
-  - js_http_request_method
-  - js_http_request_path
-  - js_http_request_query
-  - js_http_respond
-  - js_http_server_accept
-  - js_http_server_accept_v2
-  - js_http_server_close
-  - js_http_server_create
-crates/perry-stdlib/src/http.rs:
-  - js_http_client_request_end
-  - js_http_client_request_write
-  - js_http_get
-  - js_http_on
-  - js_http_process_pending
-  - js_http_request
-  - js_http_response_headers
-  - js_http_set_header
-  - js_http_set_timeout
-  - js_http_status_code
-  - js_http_status_message
-  - js_https_get
-  - js_https_request
-crates/perry-stdlib/src/net/mod.rs:
-  - js_net_process_pending
-  - js_net_socket_alloc
-  - js_net_socket_connect
-  - js_net_socket_destroy
-  - js_net_socket_end
-  - js_net_socket_method_connect
-  - js_net_socket_on
-  - js_net_socket_upgrade_tls
-  - js_net_socket_write
-  - js_tls_connect
-crates/perry-stdlib/src/readline.rs:
-  - js_readline_close
-  - js_readline_create_interface
-  - js_readline_has_active
-  - js_readline_on
-  - js_readline_question
-crates/perry-stdlib/src/streams.rs:
-  - js_readable_stream_cancel
-  - js_readable_stream_controller_close
-  - js_readable_stream_controller_desired_size
-  - js_readable_stream_controller_enqueue
-  - js_readable_stream_controller_error
-  - js_readable_stream_from_blob
-  - js_readable_stream_from_iterable
-  - js_readable_stream_from_response
-  - js_readable_stream_get_reader
-  - js_readable_stream_locked
-  - js_readable_stream_pipe_through
-  - js_readable_stream_pipe_to
-  - js_readable_stream_subclass_init
-  - js_readable_stream_tee
-  - js_reader_cancel
-  - js_reader_closed
-  - js_reader_read
-  - js_reader_release_lock
-  - js_stream_unwrap_handle
-  - js_streams_throw_byob_not_implemented
-  - js_streams_throw_byte_length_not_implemented
-  - js_transform_stream_new
-  - js_transform_stream_readable
-  - js_transform_stream_subclass_init
-  - js_transform_stream_writable
-  - js_writable_stream_abort
-  - js_writable_stream_close
-  - js_writable_stream_get_writer
-  - js_writable_stream_locked
-  - js_writable_stream_new
-  - js_writable_stream_subclass_init
-  - js_writer_abort
-  - js_writer_close
-  - js_writer_closed
-  - js_writer_desired_size
-  - js_writer_ready
-  - js_writer_release_lock
-  - js_writer_write
-crates/perry-stdlib/src/worker_threads.rs:
-  - js_worker_threads_get_worker_data
-  - js_worker_threads_has_pending
-  - js_worker_threads_on
-  - js_worker_threads_parent_port
-  - js_worker_threads_post_message
-  - js_worker_threads_process_pending
-crates/perry-stdlib/src/ws.rs:
-  - js_ws_connect
-  - js_ws_connect_start
-  - js_ws_handle_to_i64
-  - js_ws_is_open
-  - js_ws_message_count
-  - js_ws_process_pending
-  - js_ws_receive
-  - js_ws_send_to_client
-  - js_ws_server_close
-  - js_ws_server_new
-  - js_ws_wait_for_message
 */