File size: 2,975 Bytes
a4e6b16 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | """Contract for render_sample: readable, deterministic PR-description samples."""
import datetime
import sys
import tempfile
import unittest
from pathlib import Path
import pyarrow as pa
import pyarrow.parquet as pq
sys.path.insert(0, str(Path(__file__).resolve().parent))
from render_sample import render, render_doc, sample_rows, truncate
def write_parquet(path, n, row_group_size):
table = pa.table({
"id": [f"src_{i}" for i in range(n)],
"text": [f"Akapit pierwszy {i}.\n\nAkapit drugi." for i in range(n)],
"source": ["src"] * n,
"added": [datetime.date(2026, 7, 19)] * n,
"created": [["2023-11-15", "2026-09-03"]] * n,
"token_count": list(range(n)),
})
pq.write_table(table, path, row_group_size=row_group_size)
class RenderSampleTest(unittest.TestCase):
def setUp(self):
self.tmp = tempfile.TemporaryDirectory()
self.path = Path(self.tmp.name) / "src.parquet"
def tearDown(self):
self.tmp.cleanup()
def test_block_layout_matches_pr24_format(self):
row = {"id": "x", "text": "Line one.\n\nLine two.", "added": datetime.date(2026, 7, 19),
"created": ["2023-11-15", "2026-09-03"], "token_count": 5}
self.assertEqual(
render_doc(row, 800),
"```\nid: x\nadded: 2026-07-19\ncreated: 2023-11-15, 2026-09-03\ntoken_count: 5\n\n"
"Line one.\n\nLine two.\n```",
)
def test_real_newlines_not_escaped(self):
write_parquet(self.path, 5, 2)
out = render(self.path, n=1)
self.assertIn("\n\nAkapit drugi.", out)
self.assertNotIn("\\n", out)
def test_truncates_on_word_boundary(self):
self.assertEqual(truncate("alpha beta gamma", 12), "alpha beta […]")
self.assertEqual(truncate("short", 12), "short")
self.assertEqual(truncate("x" * 20, 5), "xxxxx […]")
def test_fence_outgrows_backticks_in_text(self):
out = render_doc({"text": "code: ```py\nx```"}, 800)
self.assertTrue(out.startswith("````\n") and out.endswith("\n````"))
def test_deterministic_and_bounded(self):
write_parquet(self.path, 50, 10)
self.assertEqual(render(self.path, n=3, seed=1), render(self.path, n=3, seed=1))
self.assertEqual(len(sample_rows(self.path, 3)), 3)
ids = [r["id"] for r in sample_rows(self.path, 3)]
self.assertEqual(len(set(ids)), 3)
def test_fewer_row_groups_than_n(self):
write_parquet(self.path, 6, 6) # one row group
self.assertEqual(len(sample_rows(self.path, 4)), 4)
def test_n_larger_than_table(self):
write_parquet(self.path, 2, 1)
self.assertEqual(len(sample_rows(self.path, 10)), 2)
def test_empty_parquet(self):
pq.write_table(pa.table({"id": pa.array([], pa.string()), "text": pa.array([], pa.string())}), self.path)
self.assertEqual(render(self.path), "")
if __name__ == "__main__":
unittest.main()
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