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test: Add utility then step in feature testing to draw pipeline to file #8209

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Aug 13, 2024
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test: Add utility then step in feature testing to draw pipeline to file #8209

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17 changes: 17 additions & 0 deletions test/core/pipeline/features/conftest.py
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Original file line number Diff line number Diff line change
@@ -1,10 +1,14 @@
from dataclasses import dataclass, field
from typing import Tuple, List, Dict, Any, Set, Union
from pathlib import Path
import re

from pytest_bdd import when, then, parsers

from haystack import Pipeline

PIPELINE_NAME_REGEX = re.compile(r"\[(.*)\]")


@dataclass
class PipelineRunData:
Expand Down Expand Up @@ -60,6 +64,19 @@ def run_pipeline(
return [e for e in zip(results, pipeline_run_data)]


@then("draw it to file")
def draw_pipeline(pipeline_data: Tuple[Pipeline, List[PipelineRunData]], request):
"""
Draw the pipeline to a file with the same name as the test.
"""
if m := PIPELINE_NAME_REGEX.search(request.node.name):
name = m.group(1).replace(" ", "_")
pipeline = pipeline_data[0]
graphs_dir = Path(request.config.rootpath) / "test_pipeline_graphs"
graphs_dir.mkdir(exist_ok=True)
pipeline.draw(graphs_dir / f"{name}.png")


@then("it should return the expected result")
def check_pipeline_result(pipeline_result: List[Tuple[_PipelineResult, PipelineRunData]]):
for res, data in pipeline_result:
Expand Down
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