Add example fixture

codex-rs/core/tests/fixtures/harness/multi_delta/expected_events.json

@@ -0,0 +1,78 @@
+[
+  {
+    "id": "",
+    "msg": {
+      "history_entry_count": 0,
+      "history_log_id": 0,
+      "model": "gpt-5",
+      "rollout_path": "<rollout>",
+      "session_id": "<session>",
+      "type": "session_configured"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "model_context_window": 272000,
+      "type": "task_started"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "delta": "I can",
+      "type": "agent_message_delta"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "delta": " hear",
+      "type": "agent_message_delta"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "delta": " you!",
+      "type": "agent_message_delta"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "message": "I can hear you!",
+      "type": "agent_message"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "info": {
+        "last_token_usage": {
+          "cached_input_tokens": 0,
+          "input_tokens": 12,
+          "output_tokens": 6,
+          "reasoning_output_tokens": 0,
+          "total_tokens": 18
+        },
+        "model_context_window": 272000,
+        "total_token_usage": {
+          "cached_input_tokens": 0,
+          "input_tokens": 12,
+          "output_tokens": 6,
+          "reasoning_output_tokens": 0,
+          "total_tokens": 18
+        }
+      },
+      "type": "token_count"
+    }
+  },
+  {
+    "id": "0",
+    "msg": {
+      "last_agent_message": "I can hear you!",
+      "type": "task_complete"
+    }
+  }
+]

codex-rs/core/tests/fixtures/harness/multi_delta/response_events.json

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+[
+  {"type": "response.created", "response": {"id": "resp_multi"}},
+  {"type": "response.output_text.delta", "delta": "I can"},
+  {"type": "response.output_text.delta", "delta": " hear"},
+  {"type": "response.output_text.delta", "delta": " you!"},
+  {"type": "response.output_item.done", "item": {
+    "type": "message",
+    "role": "assistant",
+    "content": [
+      {"type": "output_text", "text": "I can hear you!"}
+    ]
+  }},
+  {"type": "response.completed", "response": {
+    "id": "resp_multi",
+    "usage": {
+      "input_tokens": 12,
+      "input_tokens_details": null,
+      "output_tokens": 6,
+      "output_tokens_details": null,
+      "total_tokens": 18
+    }
+  }}
+]

codex-rs/core/tests/fixtures/harness/multi_delta/user_prompts.json

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+[
+  {
+    "type": "user_input",
+    "items": [
+      {"type": "text", "text": "Can you hear me?"}
+    ]
+  }
+]