| 1 | import { test } from "node:test"; |
| 2 | import assert from "node:assert/strict"; |
| 3 | |
| 4 | import { MAX_PINS, placePin, recentAfterPins, reorderPins } from "./pins.ts"; |
| 5 | |
| 6 | test("a pin goes at the end, or where it is asked for", () => { |
| 7 | assert.deepEqual(placePin([], "a"), ["a"]); |
| 8 | assert.deepEqual(placePin(["a", "b"], "c"), ["a", "b", "c"]); |
| 9 | assert.deepEqual(placePin(["a", "b"], "c", 0), ["c", "a", "b"]); |
| 10 | assert.deepEqual(placePin(["a", "b"], "c", 1), ["a", "c", "b"]); |
| 11 | // Past either end lands at that end. |
| 12 | assert.deepEqual(placePin(["a", "b"], "c", 99), ["a", "b", "c"]); |
| 13 | assert.deepEqual(placePin(["a", "b"], "c", -3), ["c", "a", "b"]); |
| 14 | }); |
| 15 | |
| 16 | test("pinning one already pinned moves it, never twice", () => { |
| 17 | assert.deepEqual(placePin(["a", "b", "c"], "c", 0), ["c", "a", "b"]); |
| 18 | assert.deepEqual(placePin(["a", "b", "c"], "a"), ["b", "c", "a"]); |
| 19 | }); |
| 20 | |
| 21 | test("a workspace holds a limited number of pins", () => { |
| 22 | const full = Array.from({ length: MAX_PINS }, (_, i) => `p${i}`); |
| 23 | assert.equal(placePin(full, "new"), null); |
| 24 | // Moving one that is already there is still fine. |
| 25 | assert.deepEqual(placePin(full, "p3", 0)?.[0], "p3"); |
| 26 | assert.equal(placePin(full.slice(1), "new")?.length, MAX_PINS); |
| 27 | }); |
| 28 | |
| 29 | test("reordering names every pin once and nothing else", () => { |
| 30 | assert.deepEqual(reorderPins(["a", "b", "c"], ["c", "a", "b"]), { ok: true, order: ["c", "a", "b"] }); |
| 31 | assert.equal(reorderPins(["a", "b"], ["a", "a"]).ok, false); |
| 32 | assert.equal(reorderPins(["a", "b"], ["a"]).ok, false); |
| 33 | assert.equal(reorderPins(["a", "b"], ["a", "b", "z"]).ok, false); |
| 34 | assert.deepEqual(reorderPins([], []), { ok: true, order: [] }); |
| 35 | }); |
| 36 | |
| 37 | test("recent leaves out what is pinned and keeps the latest few", () => { |
| 38 | const visited = ["a", "b", "c", "d", "e", "f", "g"].map((id) => ({ id })); |
| 39 | assert.deepEqual( |
| 40 | recentAfterPins(visited, ["b", "d"]).map((p) => p.id), |
| 41 | ["a", "c", "e", "f", "g"], |
| 42 | ); |
| 43 | assert.deepEqual(recentAfterPins(visited, [], 2).map((p) => p.id), ["a", "b"]); |
| 44 | }); |