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Create script for merging ambr files
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parent
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@ -23,6 +23,7 @@
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],
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"words": [
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"afterstep",
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"ambr",
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"Andale",
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"APNG",
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"appcode",
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39
tests/merge_ambr.py
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39
tests/merge_ambr.py
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@ -0,0 +1,39 @@
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"""Merge Amber snapshot files to include test results from both, and warn if shared results don't match.
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This allows applying the TDD principle to snapshot tests, in the specific case that
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tests can pass in isolation, but fail when run together.
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"""
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import re
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from pathlib import Path
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DIR = Path(__file__).parent / "__snapshots__"
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files = [
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DIR / "test_snapshots.ambr",
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DIR / "test_snapshots_ascii.ambr",
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]
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output_file = DIR / "test_snapshots_merged.ambr"
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re_snapshot = re.compile(r"^# name: (test_.*)\n '''\n((?:.|\n )*)\n '''$", re.MULTILINE)
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snapshots: dict[str, str] = {}
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names: set[str] = set()
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for file in files:
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with open(file, "r", encoding="utf-8") as f:
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for match in re_snapshot.finditer(f.read()):
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name = match.group(1)
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snapshot = match.group(2)
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if name in snapshots:
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if snapshots[name] != snapshot:
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print(f"Snapshots don't match for {name}; preferring result from {files[0]}")
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else:
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snapshots[name] = snapshot
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names.add(name)
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with open(output_file, "w", encoding="utf-8") as f:
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f.write(f"# serializer version: 1\n")
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for name, snapshot in snapshots.items():
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f.write(f"# name: {name}\n '''\n{snapshot}\n '''\n# ---\n")
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print(f"Merged {len(names)} snapshots from {len(files)} files into {output_file}")
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