45 lines
1.7 KiB
TypeScript
45 lines
1.7 KiB
TypeScript
import { describe, expect, it } from "vitest";
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import { pruneSelection } from "../src/renderer/selection";
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import type { SessionState } from "../src/shared/types";
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function session(packageIds: string[], itemIds: string[]): Pick<SessionState, "packages" | "items"> {
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const packages: Record<string, never> = {};
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const items: Record<string, never> = {};
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for (const id of packageIds) packages[id] = {} as never;
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for (const id of itemIds) items[id] = {} as never;
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return { packages, items };
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}
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describe("pruneSelection", () => {
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it("drops ids whose package/item no longer exists", () => {
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const sel = new Set(["p1", "i1", "ghost-p", "ghost-i"]);
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const next = pruneSelection(sel, session(["p1"], ["i1"]));
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expect([...next].sort()).toEqual(["i1", "p1"]);
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});
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it("returns the SAME set instance when nothing changed (no needless re-render)", () => {
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const sel = new Set(["p1", "i1"]);
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const next = pruneSelection(sel, session(["p1"], ["i1"]));
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expect(next).toBe(sel);
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});
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it("returns the same instance for an empty selection", () => {
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const sel = new Set<string>();
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expect(pruneSelection(sel, session(["p1"], ["i1"]))).toBe(sel);
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});
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it("prunes everything when the whole session was swapped out", () => {
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const sel = new Set(["p1", "i1"]);
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const next = pruneSelection(sel, session([], []));
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expect(next.size).toBe(0);
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expect(next).not.toBe(sel);
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});
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it("keeps a mixed package+item selection when both survive", () => {
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const sel = new Set(["p1", "p2", "i1"]);
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const next = pruneSelection(sel, session(["p1", "p2"], ["i1", "i2"]));
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expect([...next].sort()).toEqual(["i1", "p1", "p2"]);
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expect(next).toBe(sel); // unchanged → same instance
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});
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});
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