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test(tui): add test for 256-color backdrop codes

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Jeremy 2026-04-06 18:57:02 -05:00
parent c35385fe53
commit 2c91b8c6d8
1 changed files with 17 additions and 0 deletions
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17
packages/pi-tui/src/__tests__/overlay-layout.test.ts
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@ -34,6 +34,23 @@ describe("compositeOverlays — backdrop", () => {
assert.ok(dimmedLine.includes("\x1b[2m"), "base line should be dimmed");
});
it("backdrop uses 256-color dark gray background", () => {
const base = ["hello world", "second line"];
const overlay = makeEntry(["OV"], {
width: 2,
anchor: "top-left",
backdrop: true,
});
const result = compositeOverlays(base, [overlay], 20, 20, 2);
// Check a non-overlay line for full backdrop codes
const line = result.find((l) => l.includes("second line"));
assert.ok(line, "should have a line containing 'second line'");
assert.ok(line.includes("\x1b[38;5;242m"), "backdrop should set gray foreground");
assert.ok(line.includes("\x1b[48;5;233m"), "backdrop should set dark gray background");
});
it("does not dim when backdrop is false/absent", () => {
const base = ["hello world", "second line"];
const overlay = makeEntry(["OVERLAY"], {