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44 lines
1.8 KiB
TypeScript
44 lines
1.8 KiB
TypeScript
import { expect, test } from "bun:test"
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import {
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moveSelection,
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moveSelectionOffset,
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reconcileSelection,
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reconcileSelectionWindow,
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revealSelectionOffset,
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} from "../../src/ui/select-controller"
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test("reconciles and moves selections with explicit boundary policy", () => {
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expect([reconcileSelection(3, 0), reconcileSelection(4, 3), reconcileSelection(2, 6)]).toEqual([0, 2, 2])
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expect([
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moveSelection(0, { count: 3, delta: -1, policy: "clamp" }),
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moveSelection(2, { count: 3, delta: 1, policy: "clamp" }),
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moveSelection(0, { count: 3, delta: -1, policy: "wrap" }),
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moveSelection(2, { count: 3, delta: 1, policy: "wrap" }),
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]).toEqual([0, 2, 2, 0])
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})
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test("reveals selections within bounded windows", () => {
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expect([
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revealSelectionOffset(5, { count: 20, limit: 8, selected: 3 }),
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revealSelectionOffset(3, { count: 20, limit: 8, selected: 11 }),
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revealSelectionOffset(3, { count: 20, limit: 8, selected: 10 }),
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revealSelectionOffset(20, { count: 20, limit: 8, selected: 19 }),
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]).toEqual([3, 4, 3, 12])
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})
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test("keeps the selection inside a manually scrolled window", () => {
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expect([
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reconcileSelectionWindow(5, { count: 40, limit: 10, offset: 17 }),
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reconcileSelectionWindow(25, { count: 40, limit: 10, offset: 10 }),
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reconcileSelectionWindow(12, { count: 40, limit: 10, offset: 10 }),
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]).toEqual([17, 19, 12])
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})
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test("keeps movement offsets and preview margins in bounds", () => {
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expect([
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moveSelectionOffset(0, { count: 20, limit: 8, selected: 6, direction: 1 }),
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moveSelectionOffset(8, { count: 20, limit: 8, selected: 9, direction: -1 }),
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moveSelectionOffset(12, { count: 20, limit: 8, selected: 19, direction: 1 }),
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moveSelectionOffset(4, { count: 4, limit: 8, selected: 3, direction: 1 }),
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]).toEqual([1, 7, 12, 0])
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})
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