P1 from automated review. --values decoded with plain json.Unmarshal, so every
number became a float64 and integers beyond 2^53 were rounded before anything
was written. The read-back only checks that the probe cell is non-empty, so the
corruption was reported as a successful write. Order numbers and snowflake IDs
are ordinary spreadsheet data.
Measured before the fix:
1234567890123456789 -> 1234567890123456768 snowflake id, tail rewritten
12345678901234567890 -> 12345678901234567000 20-digit order number
9007199254740993 -> 9007199254740992 2^53+1
--sheets had the same defect, which the review did not mention: its records and
data are forwarded verbatim to table_put, and the float64 round trip rewrote
1234567890123456789 as 1234567890123456800 before the request left the CLI.
Both channels now decode with json.Decoder.UseNumber, and cellToString emits a
json.Number through its String method so no float conversion happens on the way
to CSV. --styles keeps plain Unmarshal on purpose: its numbers are font sizes and
pixel dimensions, already constrained to int32 by pickNum, with no large-integer
case.
Tests assert the payload the CLI actually sends, not a recomputed decode:
- TestSheetCreatePreservesLargeIntegerLiterals checks the csv argument of
set_range_from_csv and the marshalled table_put arguments. Both halves also
assert the rounded forms are absent, so removing UseNumber fails the test
instead of passing on a lucky substring match.
- TestCellToStringKeepsJSONNumberVerbatim covers large, negative, fractional and
exponent literals, and keeps the existing float64 behaviour for other callers.
The shared scriptedToolCaller keeps only the last call, and the write is the
fourth of five, so the assertion needs an intermediate call. Rather than extend
that shared helper, this adds a callRecorder local to this file: InitDeps takes
the edition.ToolCaller interface, so embedding *scriptedToolCaller and
overriding CallTool is enough.
Changed-code coverage stays at 100.0000% (850 statements) per
check-coverage-gate.sh --changed-only.