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45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
import sys
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from datetime import datetime, timezone
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from pathlib import Path
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import pytest
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pytest.importorskip("matplotlib")
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sys.path.insert(0, str(Path(__file__).parent.parent / "scripts"))
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from gen_star_history import build_series, parse_iso_timestamp
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def test_parse_iso_timestamp_supports_various_iso_formats():
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"""Contract: parse_iso_timestamp parses standard ISO 8601 strings into UTC datetimes."""
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timestamps = [
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"2026-07-15T12:34:56Z",
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"2026-07-15T12:34:56.789Z",
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"2026-07-15T12:34:56.123456Z",
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"2026-07-15T12:34:56+02:00",
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"2026-07-15T12:34:56-05:00",
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"2026-07-15T12:34:56",
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"2026-07-15",
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]
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for ts in timestamps:
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dt = parse_iso_timestamp(ts)
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assert isinstance(dt, datetime)
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assert dt.tzinfo == timezone.utc
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def test_build_series_handles_fractional_and_timezone_iso_strings():
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"""Contract: build_series parses stargazers with fractional seconds and explicit tz offsets without ValueError."""
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starred = [
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"2026-07-15T10:00:00.123Z",
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"2026-07-15T14:00:00+02:00",
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"2026-07-16T08:00:00Z",
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]
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start = datetime(2026, 7, 15, 0, 0, 0, tzinfo=timezone.utc)
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x, y = build_series(starred, start)
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assert len(x) == 4 # anchor + 3 points
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assert len(y) == 4
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assert y[0] == 0
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assert y[-1] == 3
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