diff --git a/jest.config.js b/jest.config.js
index c64a9acc..e1740f9b 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -18,7 +18,9 @@ module.exports = {
     ...pathsToModuleNameMapper(compilerOptions.paths, { prefix: '<rootDir>/' }),
     '^src/(.*)$': '<rootDir>/src/$1',
     '^test/(.*)$': '<rootDir>/test/$1',
-    src: '<rootDir>/src',
+    '^src$': '<rootDir>/src',
+    '^~/(.*)$': '<rootDir>/src/$1',
+    '^~$': '<rootDir>/src',
     '^test$': '<rootDir>/test',
   },
 }
diff --git a/src/modules/category/category.service.spec.ts b/src/modules/category/category.service.spec.ts
deleted file mode 100644
index 891713f9..00000000
--- a/src/modules/category/category.service.spec.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing'
-import { DbModule } from '../../processors/database/database.module'
-import { PostModule } from '../post/post.module'
-import { CategoryService } from './category.service'
-
-describe('CategoryService', () => {
-  let service: CategoryService
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [CategoryService],
-      imports: [PostModule, DbModule],
-    }).compile()
-
-    service = module.get<CategoryService>(CategoryService)
-  })
-
-  it('should be defined', () => {
-    expect(service).toBeDefined()
-  })
-})
diff --git a/src/modules/post/post.controller.spec.ts b/src/modules/post/post.controller.spec.ts
deleted file mode 100644
index 569e1059..00000000
--- a/src/modules/post/post.controller.spec.ts
+++ /dev/null
@@ -1,18 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing'
-import { PostController } from './post.controller'
-
-describe('PostController', () => {
-  let controller: PostController
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      controllers: [PostController],
-    }).compile()
-
-    controller = module.get<PostController>(PostController)
-  })
-
-  it('should be defined', () => {
-    expect(controller).toBeDefined()
-  })
-})
diff --git a/src/modules/post/post.service.spec.ts b/src/modules/post/post.service.spec.ts
deleted file mode 100644
index a4f4bc5d..00000000
--- a/src/modules/post/post.service.spec.ts
+++ /dev/null
@@ -1,22 +0,0 @@
-import { Test, TestingModule } from '@nestjs/testing'
-import { getFakeCategoryModel } from '~/../test/db-model.mock'
-import { DbModule } from '../../processors/database/database.module'
-import { CategoryService } from '../category/category.service'
-import { PostService } from './post.service'
-
-describe('PostService', () => {
-  let service: PostService
-
-  beforeEach(async () => {
-    const module: TestingModule = await Test.createTestingModule({
-      providers: [PostService, CategoryService, getFakeCategoryModel()],
-      imports: [DbModule],
-    }).compile()
-
-    service = module.get<PostService>(PostService)
-  })
-
-  it('should be defined', () => {
-    expect(service).toBeDefined()
-  })
-})
diff --git a/src/processors/helper/helper.image.service.ts b/src/processors/helper/helper.image.service.ts
index 888c6474..f121aa4d 100644
--- a/src/processors/helper/helper.image.service.ts
+++ b/src/processors/helper/helper.image.service.ts
@@ -93,7 +93,7 @@ export class ImageService {
     const size = imageSize(buffer)
 
     // get accent color
-    const accent = await getAverageRGB(buffer, size)
+    const accent = await getAverageRGB(buffer)
 
     return { size, accent }
   }
diff --git a/src/utils/pic.util.ts b/src/utils/pic.util.ts
index a6b61866..a626e4bd 100644
--- a/src/utils/pic.util.ts
+++ b/src/utils/pic.util.ts
@@ -1,19 +1,24 @@
 import Vibrant = require('node-vibrant')
-import { ISizeCalculationResult } from 'image-size/dist/types/interface'
+import { lexer } from 'marked'
 
-//TODO use ast to parse markdown
 export const pickImagesFromMarkdown = (text: string) => {
-  const reg = /(?<=!\[.*\]\()(.+)(?=\))/g
+  const ast = lexer(text)
   const images = [] as string[]
-  for (const r of text.matchAll(reg)) {
-    images.push(r[0])
+  function pickImage(node: any) {
+    if (node.type === 'image') {
+      images.push(node.href)
+      return
+    }
+    if (node.tokens && Array.isArray(node.tokens)) {
+      return node.tokens.forEach(pickImage)
+    }
   }
+  ast.forEach(pickImage)
   return images
 }
 
 export async function getAverageRGB(
   buffer: Buffer,
-  size: ISizeCalculationResult,
 ): Promise<string | undefined> {
   if (!buffer) {
     return undefined
diff --git a/test/src/utils/pic.util.spec.ts b/test/src/utils/pic.util.spec.ts
new file mode 100644
index 00000000..8a55e62a
--- /dev/null
+++ b/test/src/utils/pic.util.spec.ts
@@ -0,0 +1,15 @@
+import { pickImagesFromMarkdown } from '~/utils/pic.util'
+
+describe('src/utils/pic.util', () => {
+  it('test marked ast', () => {
+    const res = pickImagesFromMarkdown(`
+![](https://cdn.innei.ren/bed/2021/0813211729.jpeg)
+
+![](https://cdn.innei.ren/bed/2021/0813212633.jpg)
+`)
+    expect(res).toEqual([
+      'https://cdn.innei.ren/bed/2021/0813211729.jpeg',
+      'https://cdn.innei.ren/bed/2021/0813212633.jpg',
+    ])
+  })
+})
diff --git a/tsconfig.json b/tsconfig.json
index 53c06266..a9ffb2fd 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -22,7 +22,7 @@
       "~/*": [
         "./src/*"
       ]
-    },
+    }
   },
   "exclude": [
     "dist",