diff --git a/package.json b/package.json
index 3671bc99..11fcb55b 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,7 @@
   ],
   "types": "dist/roundware.d.ts",
   "scripts": {
-    "test": "jest --silent",
+    "test": "jest",
     "build": "rm -rf dist && NODE_ENV=production && npm-run-all --parallel build:*",
     "build:main": "babel src --out-dir dist --extensions '.ts' --copy-files src/types/*.d.ts && tsc --declaration --outDir dist/ --emitDeclarationOnly",
     "build:umd": "webpack --mode=production --output-filename roundware.umd.js",
diff --git a/src/playlistAudioTrack.ts b/src/playlistAudioTrack.ts
index 6b8b7997..390c73a8 100644
--- a/src/playlistAudioTrack.ts
+++ b/src/playlistAudioTrack.ts
@@ -164,7 +164,6 @@ export class PlaylistAudiotrack {
     client,
   }: {
     audioContext: IAudioContext;
-
     audioData: IAudioTrackData;
     playlist: Playlist;
     client: Roundware;
diff --git a/src/types/audioTrack.d.ts b/src/types/audioTrack.d.ts
index 2f119715..3321bbca 100644
--- a/src/types/audioTrack.d.ts
+++ b/src/types/audioTrack.d.ts
@@ -21,5 +21,5 @@ export interface IAudioTrackData {
   banned_duration: number;
   tag_filters: any[];
   project_id: number;
-  timed_asset_priority: number;
+  timed_asset_priority: string;
 }
diff --git a/tests/__mocks__/assetPool.ts b/tests/__mocks__/assetPool.ts
new file mode 100644
index 00000000..11d623e3
--- /dev/null
+++ b/tests/__mocks__/assetPool.ts
@@ -0,0 +1,9 @@
+import { AssetPool } from "../../src/assetPool";
+import { MOCK_ASSET_DATA } from "./mock_api_responses";
+const mockAssetPool = new AssetPool({
+  assets: MOCK_ASSET_DATA,
+  filterChain: undefined,
+  sortMethods: undefined,
+  mixParams: undefined,
+});
+export { mockAssetPool };
diff --git a/tests/__mocks__/mixer/TrackOptions.ts b/tests/__mocks__/mixer/TrackOptions.ts
new file mode 100644
index 00000000..e7b8eb36
--- /dev/null
+++ b/tests/__mocks__/mixer/TrackOptions.ts
@@ -0,0 +1,5 @@
+import { TrackOptions } from "../../../src/mixer/TrackOptions";
+import { MOCK_AUDIO_TRACKS_DATA } from "../mock_api_responses";
+
+const mockTrackOptions = new TrackOptions(() => "", MOCK_AUDIO_TRACKS_DATA[0]);
+export { mockTrackOptions };
diff --git a/tests/__mocks__/playlist.ts b/tests/__mocks__/playlist.ts
new file mode 100644
index 00000000..596e2f8c
--- /dev/null
+++ b/tests/__mocks__/playlist.ts
@@ -0,0 +1,17 @@
+import { AudioContext } from "standardized-audio-context-mock";
+import { Playlist } from "../../src/playlist";
+import { coordsToPoints } from "../../src/utils";
+import { mockAssetPool } from "./assetPool";
+import { mockRoundware } from "./roundware";
+import { faker } from "@faker-js/faker";
+const mockPlaylist = new Playlist({
+  client: mockRoundware,
+  assetPool: mockAssetPool,
+  audioContext: new AudioContext(),
+  listenerPoint: coordsToPoints({
+    latitude: +faker.address.latitude(),
+    longitude: +faker.address.longitude(),
+  }),
+});
+
+export { mockPlaylist };
diff --git a/tests/__mocks__/playlistAudioTrack.ts b/tests/__mocks__/playlistAudioTrack.ts
new file mode 100644
index 00000000..f5f022b2
--- /dev/null
+++ b/tests/__mocks__/playlistAudioTrack.ts
@@ -0,0 +1,14 @@
+import { AudioContext } from "standardized-audio-context-mock";
+import { PlaylistAudiotrack } from "../../src/playlistAudioTrack";
+import { MOCK_AUDIO_TRACKS_DATA } from "./mock_api_responses";
+import { mockPlaylist } from "./playlist";
+import { mockRoundware } from "./roundware";
+
+const mockPlaylistAudiotrack = new PlaylistAudiotrack({
+  audioContext: new AudioContext(),
+  audioData: MOCK_AUDIO_TRACKS_DATA[0],
+  playlist: mockPlaylist,
+  client: mockRoundware,
+});
+
+export { mockPlaylistAudiotrack };
diff --git a/tests/__mocks__/roundware.ts b/tests/__mocks__/roundware.ts
new file mode 100644
index 00000000..779abbb1
--- /dev/null
+++ b/tests/__mocks__/roundware.ts
@@ -0,0 +1,23 @@
+import { Roundware } from "../../src/roundware";
+import config from "./roundware.config";
+import { faker } from "@faker-js/faker";
+import { IAssetFilters } from "../../src/types/asset";
+export const mockRoundware = new Roundware({
+  deviceId: "test",
+  geoListenMode: 1,
+  listenerLocation: {
+    latitude: +faker.address.latitude(),
+    longitude: +faker.address.longitude(),
+  },
+  projectId: 1,
+  serverUrl: config.baseServerUrl,
+  speakerConfig: {
+    acceptableDelayMs: 100,
+    length: 100,
+    loop: true,
+    prefetch: true,
+    sync: true,
+    syncCheckInterval: 100,
+  },
+  assetFilters: [] as IAssetFilters,
+});
diff --git a/tests/__tests__/TrackStates.test.ts b/tests/__tests__/TrackStates.test.ts
new file mode 100644
index 00000000..c115b6c5
--- /dev/null
+++ b/tests/__tests__/TrackStates.test.ts
@@ -0,0 +1,13 @@
+import { LoadingState } from "../../src/TrackStates";
+import { mockTrackOptions } from "../__mocks__/mixer/TrackOptions";
+import { mockPlaylistAudiotrack } from "../__mocks__/playlistAudioTrack";
+jest.mock("standardized-audio-context", () =>
+  require("standardized-audio-context-mock")
+);
+describe("LoadingState", () => {
+  test("should initialize", () => {
+    const state = new LoadingState(mockPlaylistAudiotrack, mockTrackOptions);
+    expect(state).toBeTruthy();
+    expect(state.asset).toBeNull();
+  });
+});
diff --git a/tests/__tests__/assetFilters.test.ts b/tests/__tests__/assetFilters.test.ts
index f3352435..4a01ceef 100644
--- a/tests/__tests__/assetFilters.test.ts
+++ b/tests/__tests__/assetFilters.test.ts
@@ -1,3 +1,8 @@
+import { faker } from "@faker-js/faker";
+import { lineString, point } from "@turf/helpers";
+import lineToPolygon from "@turf/line-to-polygon";
+import { addDays, subDays } from "date-fns";
+import { omit } from "lodash";
 import { rankForGeofilteringEligibility } from "../../src/assetFilters";
 import { assetDecorationMapper } from "../../src/assetPool";
 import {
@@ -15,22 +20,12 @@ import {
   timedAssetFilter,
   timedRepeatFilter,
 } from "../../src/roundware";
+import { IDecoratedAsset } from "../../src/types/asset";
 import {
   getRandomAssetData,
   getRandomDecoratedAssetData,
 } from "../__mocks__/assetData";
-import { point } from "@turf/helpers";
-import { faker } from "@faker-js/faker";
-import { IDecoratedAsset } from "../../src/types/asset";
-import {
-  InvalidArgumentError,
-  RoundwareFrameworkError,
-} from "../../src/errors/app.errors";
-import { addDays, subDays } from "date-fns";
-import { omit } from "lodash";
-import lineToPolygon from "@turf/line-to-polygon";
-import { lineString } from "@turf/helpers";
-import distance from "@turf/distance";
+
 describe("rankForGeofilteringEligibility", () => {
   test("should return false if geo listen mode is disabled", () => {
     expect(
diff --git a/tests/__tests__/assetPool.test.ts b/tests/__tests__/assetPool.test.ts
new file mode 100644
index 00000000..68d2eb59
--- /dev/null
+++ b/tests/__tests__/assetPool.test.ts
@@ -0,0 +1,55 @@
+import AssetPool, { assetDecorationMapper } from "../../src/assetPool";
+import { ITimedAssetData } from "../../src/types/index";
+import { getRandomAssetData } from "../__mocks__/assetData";
+
+import { AssetSorter } from "../../src/assetSorter";
+import { silenceAudioBase64 } from "../../src/playlistAudioTrack";
+import { InvalidArgumentError } from "../../src/errors/app.errors";
+jest.mock(`../../src/assetSorter`);
+const mockAssetSorter = AssetSorter as jest.MockedClass<typeof AssetSorter>;
+
+describe("AssetPool", () => {
+  // instantiation;
+  test("should instantiate asset pool", () => {
+    const assetPool = new AssetPool({
+      assets: getRandomAssetData(10),
+    });
+
+    expect(mockAssetSorter).toHaveBeenCalledTimes(1);
+    console.log(mockAssetSorter.mock.calls);
+
+    expect(assetPool).toBeInstanceOf(AssetPool);
+    silenceAudioBase64;
+  });
+
+  test("should throw error if arguments of updateAssets() is not array", () => {
+    const assetPool = new AssetPool({
+      assets: getRandomAssetData(10),
+      timedAssets: [],
+    });
+
+    expect(() => {
+      // @ts-expect-error
+      assetPool.updateAssets(1, 2);
+    }).toThrowError(InvalidArgumentError);
+  });
+
+  test("should decorate assets", () => {
+    const testAssetData = getRandomAssetData(10);
+    const timedAssets: ITimedAssetData[] = [
+      {
+        asset_id: testAssetData[0].id,
+
+        start: 23,
+        end: 10,
+      },
+    ];
+    const decoratedAssets = testAssetData.map(
+      assetDecorationMapper(timedAssets)
+    );
+
+    expect(decoratedAssets[0].timedAssetStart).toBe(23);
+
+    expect(decoratedAssets[0].timedAssetEnd).toBe(10);
+  });
+});