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test(calc): Excel-verified blank results for VLOOKUP, HLOOKUP and LOOKUP (#374)

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Excel 365 for Windows (2609, build 16.0.20430.20032) keeps a lookup of an
empty cell blank inside ISBLANK and concatenation for VLOOKUP, HLOOKUP and
LOOKUP. The cases were checked in Excel by scottcampbelldata in
vangel76/gridcraft#1.

Co-Authored-By: scottcampbelldata <251750033+scottcampbelldata@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
vangel76
2026-10-17 15:23:42 +02:00
co-authored by scottcampbelldata Claude Opus 5.5
parent d446fde718
commit 9977d850a4
1 changed files with 18 additions and 0 deletions
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crates/calc/src/tests.rs
+18
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@@ -1193,6 +1193,24 @@ fn lookup_of_an_empty_cell_stays_blank() {
}
}
#[test]
fn blank_lookup_values_match_excel_windows_observation() {
// Excel 365 Windows 2609, build 16.0.20430.20032, black-box check 2026-10-13:
// A1="k", B1 and A2 genuinely empty.
// All three value lookups preserve blankness inside ISBLANK/concatenation.
let mut t = T::new();
t.set("A1", "k");
for (at, f, want) in [
("D1", "=ISBLANK(VLOOKUP(\"k\",A1:B1,2,FALSE))", Value::Bool(true)),
("D2", "=ISBLANK(HLOOKUP(\"k\",A1:A2,2,FALSE))", Value::Bool(true)),
("D3", "=ISBLANK(LOOKUP(\"k\",A1:A1,B1:B1))", Value::Bool(true)),
("D4", "=\"x\"&HLOOKUP(\"k\",A1:A2,2,FALSE)&\"y\"", Value::from("xy")),
] {
t.set(at, f);
assert_eq!(t.get(at), want, "{f}");
}
}
#[test]
fn cell_width_is_the_column_width_dialog_value_rounded() {
// #735: Excel 365 values. Widths in px as `home.columnWidth {"chars"}` sets them