feat(benchmark/report): Add and record `TestResult.n_steps`

- Added `n_steps` attribute to `TestResult` type
- Added logic to record the number of steps to `BuiltinChallenge.test_method`, `WebArenaChallenge.test_method`, and `.reports.add_test_result_to_report`

benchmark/agbenchmark/challenges/builtin.py

@@ -173,6 +173,7 @@ class BuiltinChallenge(BaseChallenge):
             timeout = int(cutoff)  # type: ignore
 
         task_id = ""
+        n_steps = 0
         timed_out = None
         try:
             async for step in self.run_challenge(
@@ -180,9 +181,11 @@ class BuiltinChallenge(BaseChallenge):
             ):
                 if not task_id:
                     task_id = step.task_id
+                n_steps += 1
             timed_out = False
         except TimeoutError:
             timed_out = True
+        request.node.user_properties.append(("n_steps", n_steps))
         request.node.user_properties.append(("timed_out", timed_out))
 
         agent_client_config = ClientConfig(host=config.host)

benchmark/agbenchmark/challenges/webarena.py

@@ -393,6 +393,7 @@ class WebArenaChallenge(BaseChallenge):
         elif cutoff := request.config.getoption("--cutoff"):
             timeout = int(cutoff)
 
+        n_steps = 0
         timed_out = None
         eval_results_per_step: list[list[tuple[_Eval, EvalResult]]] = []
         try:
@@ -402,6 +403,7 @@ class WebArenaChallenge(BaseChallenge):
                 if not step.output:
                     logger.warn(f"Step has no output: {step}")
                     continue
+                n_steps += 1
                 step_eval_results = self.evaluate_step_result(
                     step, mock=request.config.getoption("--mock")
                 )
@@ -419,6 +421,7 @@ class WebArenaChallenge(BaseChallenge):
             timed_out = False
         except TimeoutError:
             timed_out = True
+        request.node.user_properties.append(("n_steps", n_steps))
         request.node.user_properties.append(("timed_out", timed_out))
 
         # Get the column aggregate (highest score for each Eval)

benchmark/agbenchmark/reports/processing/report_types.py

@@ -20,6 +20,8 @@ class TestResult(BaseModel):
     """If applicable, the reason why the run was not successful"""
     reached_cutoff: bool | None = None  # None if in progress
     """Whether the run had to be stopped due to reaching the timeout"""
+    n_steps: int | None = None
+    """The number of steps executed by the agent"""
     cost: float | None = None
     """The (known) cost incurred by the run, e.g. from using paid LLM APIs"""
 

benchmark/agbenchmark/reports/reports.py

@@ -92,6 +92,7 @@ def add_test_result_to_report(
             run_time=f"{str(round(call.duration, 3))} seconds",
             fail_reason=str(call.excinfo.value) if call.excinfo else None,
             reached_cutoff=user_properties.get("timed_out", False),
+            n_steps=user_properties.get("n_steps"),
         )
     )
     test_report.metrics.success_percentage = (