feat(streamer): env config parsing + validation

streamer/tests/config.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, it } from "vitest";
+import { loadConfig, ConfigError } from "../src/config.ts";
+
+const baseEnv = {
+  STATION: "minecraft",
+  RTMP_URL: "rtmp://example/live/key",
+  LIQUIDSOAP_PCM: "tcp://liquidsoap:9100",
+  NOW_PLAYING_DIR: "/now-playing",
+  LIBRARY_DIR: "/library",
+  STYLE: "denpa",
+  TZ: "Asia/Tokyo",
+  VIDEO_BITRATE: "4500k",
+  AUDIO_BITRATE: "160k",
+  FRAMERATE: "30",
+  RESOLUTION: "1920x1080",
+  STATION_TUNE_IN_URL: "denpa.femboy.page",
+  HEALTH_PORT: "12010",
+  LOG_LEVEL: "info",
+};
+
+describe("loadConfig", () => {
+  it("parses required fields", () => {
+    const cfg = loadConfig(baseEnv);
+    expect(cfg.station).toBe("minecraft");
+    expect(cfg.rtmpUrl).toBe("rtmp://example/live/key");
+    expect(cfg.style).toBe("denpa");
+    expect(cfg.framerate).toBe(30);
+  });
+
+  it("rejects invalid style", () => {
+    expect(() => loadConfig({ ...baseEnv, STYLE: "weird" })).toThrow(ConfigError);
+  });
+
+  it("rejects malformed rtmp url", () => {
+    expect(() => loadConfig({ ...baseEnv, RTMP_URL: "not-a-url" })).toThrow(ConfigError);
+  });
+
+  it("rejects missing required field", () => {
+    const { STATION: _omit, ...rest } = baseEnv;
+    expect(() => loadConfig(rest)).toThrow(ConfigError);
+  });
+
+  it("parses pcm tcp url", () => {
+    const cfg = loadConfig(baseEnv);
+    expect(cfg.pcmHost).toBe("liquidsoap");
+    expect(cfg.pcmPort).toBe(9100);
+  });
+});