feat(spotify): implement milestone M2 auth

skills/spotify/tests/config.test.ts

@@ -0,0 +1,51 @@
+import assert from "node:assert/strict";
+import { mkdtemp, mkdir, writeFile } from "node:fs/promises";
+import { join } from "node:path";
+import { tmpdir } from "node:os";
+import { test } from "node:test";
+
+import { loadSpotifyConfig, resolveSpotifyPaths } from "../src/config.js";
+
+test("uses SPOTIFY_CONFIG_DIR when it exists", async () => {
+  const root = await mkdtemp(join(tmpdir(), "spotify-config-"));
+  await writeFile(join(root, "config.json"), JSON.stringify({ clientId: "id", redirectUri: "http://127.0.0.1:8888/callback" }));
+
+  const paths = await resolveSpotifyPaths({ env: { SPOTIFY_CONFIG_DIR: root }, homeDir: "/missing-home" });
+
+  assert.equal(paths.configDir, root);
+  assert.equal(paths.configPath, join(root, "config.json"));
+  assert.equal(paths.tokenPath, join(root, "token.json"));
+});
+
+test("loads and validates config json", async () => {
+  const root = await mkdtemp(join(tmpdir(), "spotify-config-"));
+  await writeFile(join(root, "config.json"), JSON.stringify({ clientId: "client", redirectUri: "http://127.0.0.1:8888/callback" }));
+
+  const config = await loadSpotifyConfig({ env: { SPOTIFY_CONFIG_DIR: root }, homeDir: "/missing-home" });
+
+  assert.deepEqual(config, {
+    clientId: "client",
+    redirectUri: "http://127.0.0.1:8888/callback"
+  });
+});
+
+test("finds upward clawdbot credentials", async () => {
+  const root = await mkdtemp(join(tmpdir(), "spotify-upward-"));
+  const configDir = join(root, ".clawdbot", "credentials", "spotify");
+  const nested = join(root, "a", "b");
+  await mkdir(configDir, { recursive: true });
+  await mkdir(nested, { recursive: true });
+
+  const paths = await resolveSpotifyPaths({ env: {}, startDir: nested, homeDir: "/missing-home" });
+
+  assert.equal(paths.configDir, configDir);
+});
+
+test("rejects missing config file", async () => {
+  const root = await mkdtemp(join(tmpdir(), "spotify-config-"));
+
+  await assert.rejects(
+    () => loadSpotifyConfig({ env: { SPOTIFY_CONFIG_DIR: root }, homeDir: "/missing-home" }),
+    /Spotify config not found/
+  );
+});