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103 lines
3.1 KiB
TypeScript
103 lines
3.1 KiB
TypeScript
import test from "node:test";
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import assert from "node:assert/strict";
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import {
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AVATAR_COLOR_NAMES,
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AVATAR_COLORS,
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AVATAR_ICON_NAMES,
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fallbackAvatarFor,
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parseAvatarMarker,
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} from "../lib/avatar";
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test("icon and color tables are well-formed", () => {
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assert.equal(AVATAR_ICON_NAMES.length, 16);
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assert.equal(AVATAR_COLOR_NAMES.length, 8);
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assert.equal(new Set(AVATAR_ICON_NAMES).size, AVATAR_ICON_NAMES.length);
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for (const name of AVATAR_ICON_NAMES) {
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assert.match(name, /^[a-z0-9-]+$/);
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}
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for (const hex of Object.values(AVATAR_COLORS)) {
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assert.match(hex, /^#[0-9a-f]{6}$/);
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}
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});
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test("fallbackAvatarFor is deterministic and always valid", () => {
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for (const username of ["alice", "bob", "局长", "", "a".repeat(200)]) {
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const first = fallbackAvatarFor(username);
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assert.deepEqual(first, fallbackAvatarFor(username));
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assert.ok(AVATAR_ICON_NAMES.includes(first.icon), `icon for ${username}`);
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assert.ok(
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AVATAR_COLOR_NAMES.includes(first.color),
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`color for ${username}`,
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);
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}
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});
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test("fallback assignment is pinned — a hash change would shuffle every user's avatar", () => {
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// These values are part of the visual contract: users recognise each other
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// by the fallback avatar, so a refactor must not silently reassign them.
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assert.deepEqual(fallbackAvatarFor("alice"), {
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icon: "moon",
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color: "slate",
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});
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assert.deepEqual(fallbackAvatarFor("bob"), { icon: "cloud", color: "rose" });
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assert.deepEqual(fallbackAvatarFor("局长"), {
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icon: "sparkles",
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color: "slate",
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});
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// Empty usernames hash the literal "user" placeholder.
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assert.deepEqual(fallbackAvatarFor(""), { icon: "leaf", color: "pink" });
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assert.deepEqual(fallbackAvatarFor("user"), { icon: "leaf", color: "pink" });
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});
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test("fallback color index uses an unsigned shift (regression)", () => {
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// "alice" hashes above 2^31; with a signed ">> 4" the color index went
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// negative and the avatar lost its background fill entirely.
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const { color } = fallbackAvatarFor("alice");
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assert.notEqual(AVATAR_COLORS[color], undefined);
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});
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test("parseAvatarMarker classifies image markers", () => {
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assert.deepEqual(parseAvatarMarker("img:1"), { kind: "image", version: "1" });
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assert.deepEqual(parseAvatarMarker("img:42"), {
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kind: "image",
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version: "42",
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});
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});
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test("parseAvatarMarker classifies known icon markers", () => {
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assert.deepEqual(parseAvatarMarker("icon:leaf:teal"), {
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kind: "icon",
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icon: "leaf",
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color: "teal",
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});
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assert.deepEqual(parseAvatarMarker(" icon:moon:slate "), {
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kind: "icon",
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icon: "moon",
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color: "slate",
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});
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});
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test("parseAvatarMarker degrades everything else to the fallback", () => {
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const fallbackInputs = [
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"",
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" ",
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undefined,
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null,
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"icon:not-a-real-icon:teal",
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"icon:leaf:not-a-color",
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"ICON:Leaf:Teal",
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"icon:leaf",
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"icon:leaf:teal:extra",
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"../etc/passwd",
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"javascript:alert(1)",
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];
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for (const input of fallbackInputs) {
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assert.deepEqual(
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parseAvatarMarker(input),
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{ kind: "fallback" },
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`input: ${String(input)}`,
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);
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}
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});
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