### Question:
WxMpMaterialServiceImpl implements WxMpMaterialService { @Override public boolean materialDelete(String mediaId) throws WxErrorException { return this.wxMpService.execute(MaterialDeleteRequestExecutor.create(this.wxMpService.getRequestHttp()), MATERIAL_DEL_URL, mediaId); } WxMpMaterialServiceImpl(WxMpService wxMpService); @Override WxMediaUploadResult mediaUpload(String mediaType, String fileType, InputStream inputStream); @Override WxMediaUploadResult mediaUpload(String mediaType, File file); @Override File mediaDownload(String mediaId); @Override WxMediaImgUploadResult mediaImgUpload(File file); @Override WxMpMaterialUploadResult materialFileUpload(String mediaType, WxMpMaterial material); @Override WxMpMaterialUploadResult materialNewsUpload(WxMpMaterialNews news); @Override InputStream materialImageOrVoiceDownload(String mediaId); @Override WxMpMaterialVideoInfoResult materialVideoInfo(String mediaId); @Override WxMpMaterialNews materialNewsInfo(String mediaId); @Override boolean materialNewsUpdate(WxMpMaterialArticleUpdate wxMpMaterialArticleUpdate); @Override boolean materialDelete(String mediaId); @Override WxMpMaterialCountResult materialCount(); @Override WxMpMaterialNewsBatchGetResult materialNewsBatchGet(int offset, int count); @Override WxMpMaterialFileBatchGetResult materialFileBatchGet(String type, int offset, int count);  }### Answer:
@Test(dependsOnMethods = {"testMaterialFileList"}, dataProvider = "allTestMaterial") public void testDeleteMaterial(String mediaId) throws WxErrorException { boolean result = this.wxService.getMaterialService().materialDelete(mediaId); assertTrue(result); }