mirror of
https://github.com/react/react-native.git
synced 2026-09-28 13:23:09 +08:00
Jakub Piasecki
fecd8e3923
Summary: Pull Request resolved: https://github.com/facebook/react-native/pull/55906 Changelog: [Internal] Adds a simple snapshot diffing mode to the snapshot generation (`--check` argument). Removes `RUN_ON_REACT_NATIVE` constant in favor of `--test` argument. Reviewed By: cipolleschi Differential Revision: D93407648 fbshipit-source-id: 7860bca27ba6784b9b8517ec86bd16b41af48d9b
74 lines
2.4 KiB
Python
74 lines
2.4 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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"""
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Utilities for comparing API snapshots.
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"""
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import difflib
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import os
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def check_snapshots(generated_dir: str, committed_dir: str) -> bool:
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"""Compare generated snapshots against committed ones.
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Returns True if check passes (snapshots match or no committed snapshots).
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Returns False if snapshots differ.
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"""
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if not os.path.isdir(committed_dir):
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print(f"No committed snapshots directory found at: {committed_dir}")
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print("Skipping comparison (no baseline to compare against)")
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return True
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committed_files = sorted(f for f in os.listdir(committed_dir) if f.endswith(".api"))
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generated_files = sorted(f for f in os.listdir(generated_dir) if f.endswith(".api"))
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if not committed_files:
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print("No committed snapshot files found")
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print("Skipping comparison (no baseline to compare against)")
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return True
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committed_set = set(committed_files)
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generated_set = set(generated_files)
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all_passed = True
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for filename in sorted(committed_set | generated_set):
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committed_path = os.path.join(committed_dir, filename)
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generated_path = os.path.join(generated_dir, filename)
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if filename not in generated_set:
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print(
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f"FAIL: {filename} exists in committed snapshots but was not generated"
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)
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all_passed = False
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continue
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if filename not in committed_set:
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print(f"OK: {filename} generated (no committed baseline)")
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continue
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with open(committed_path) as f:
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committed_content = f.read()
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with open(generated_path) as f:
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generated_content = f.read()
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if committed_content == generated_content:
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print(f"OK: {filename} matches committed snapshot")
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else:
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print(f"FAIL: {filename} differs from committed snapshot")
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diff = "\n".join(
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difflib.unified_diff(
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committed_content.splitlines(),
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generated_content.splitlines(),
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fromfile=f"committed/{filename}",
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tofile=f"generated/{filename}",
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lineterm="",
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)
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)
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print(diff)
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all_passed = False
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return all_passed
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