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28 lines
1023 B
TypeScript
28 lines
1023 B
TypeScript
import { describe, expect, it } from "vitest";
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import { columnCountForWidth } from "@/components/ColumnGrid";
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// Min column width 260px, gap 12px. A width fits N columns when
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// floor((width + gap) / (minColumnWidth + gap)) === N, never below 1.
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describe("columnCountForWidth", () => {
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it("never returns fewer than one column, even at zero width", () => {
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expect(columnCountForWidth(0)).toBe(1);
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expect(columnCountForWidth(100)).toBe(1);
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expect(columnCountForWidth(259)).toBe(1);
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});
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it("stays at one column just below the two-column threshold", () => {
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// 2*260 + 12 = 532 is the first width that fits two columns.
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expect(columnCountForWidth(531)).toBe(1);
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});
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it("reaches two columns exactly at the threshold (the list-fallback boundary)", () => {
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expect(columnCountForWidth(532)).toBe(2);
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});
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it("scales up with width", () => {
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expect(columnCountForWidth(804)).toBe(3);
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expect(columnCountForWidth(1152)).toBe(4);
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expect(columnCountForWidth(1600)).toBe(5);
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});
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});
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