Implemented logic

.gitignore

+/.data
+.env
+
+# Dependency directories
+node_modules/
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+
+# Optional npm cache directory
+.npm/
+
+# Optional REPL history
+.node_repl_history/

.npmignore

+*
+!/src/**

docker-compose.dev.yml

+version: '3'
+
+services:
+  server:
+    image: node:10-alpine
+    volumes:
+      - .:/app
+      - ./.data/files:/files
+    working_dir: /app
+    entrypoint: sh
+    command: -c "yarn install --production=false && npx nodemon --signal SIGHUP -x 'npm test'"
+    networks:
+      default:
+        aliases:
+          - api

package.json

 {
 	"name":    "@gviagroup/release-server-middleware",
-	"version": "0.1.0"
+	"version": "0.1.0",
+	
+	"main": "src/apis/index.js",
+	
+	"scripts": {
+		"test": "ava --color --fail-fast -s -v"
+	},
+	
+	"dependencies": {
+		"del":             "^5.1.0",
+		"express":         "^4.17.1",
+		"lodash.pick":     "^4.4.0",
+		"mkdirp":          "^0.5.1",
+		"multer":          "^1.4.2",
+		"semver":          "^6.3.0",
+		"@gviagroup/jsvv": "~0.11.0"
+	},
+	"devDependencies": {
+		"ava":       "^2.4.0",
+		"axios":     "^0.19.0",
+		"form-data": "^2.5.1",
+		"nodemon":   "^1.19.4"
+	},
+	
+	"_projectTemplateVersion": "1.1.2"
 }

src/apis/index.js

+'use strict';
+
+const path = require('path');
+
+const express                                         = require('express');
+const multer                                          = require('multer');
+const jsvv                                            = require('@gviagroup/jsvv');
+const {handle, methodNotAllowed, SYMBOLS: {IS_EMPTY}} = require('../utils/api');
+const {AppError}                                      = require('../utils/errors');
+
+const reqVersionSchema     = require('../schemas/request-version');
+const resReleaseInfoSchema = require('../schemas/response-release-info');
+
+module.exports = function ({filesDir, tmpFilesDir} = {}) {
+	const releasesModel = require('../models/releases')({filesDir, tmpFilesDir});
+	
+	const router = express.Router();
+	const methodNotAllowedHandler = methodNotAllowed(router);
+	
+	const fileGetHandler = handle(req => {
+			req.params.version = jsvv(req.params.version, reqVersionSchema, {root: 'version'});
+		},
+		async (req, res, next) => {
+			const filePath = await releasesModel.getReleaseFilePath({version: req.params.version});
+			if (!filePath) return null;
+			
+			req.url = path.relative(releasesModel.FILES_DIR, filePath);
+			next();
+		});
+	const latestHandler = (req, res, next) => {
+		req.params.version = 'latest';
+		next();
+	};
+	const staticHandler = express.static(releasesModel.FILES_DIR);
+	
+	const upload = multer({
+		dest: releasesModel.TMP_FILES_DIR
+	});
+	
+	
+	
+	router.route('/latest')
+		.head(latestHandler, fileGetHandler, staticHandler)
+		.get( latestHandler, fileGetHandler, staticHandler)
+		.all(methodNotAllowedHandler);
+	
+	router.route('/latest/info')
+		.get(handle(undefined,
+			() => releasesModel.getReleaseInfo({version: 'latest'}),
+			response => jsvv(response, resReleaseInfoSchema, {root: 'releaseInfo'})))
+		.all(methodNotAllowedHandler);
+	
+	router.route('/releases')
+		.get(handle(undefined,
+			() => releasesModel.getAllReleases(),
+			response => jsvv(response, {
+				type:     Array,
+				required: true,
+				item:     resReleaseInfoSchema
+			}, {root: 'releases'})))
+		.all(methodNotAllowedHandler);
+	
+	router.route('/:version')
+		.head(fileGetHandler, staticHandler)
+		.get( fileGetHandler, staticHandler)
+		.put(upload.single('file'), handle(req => {
+				req.params.version = jsvv(req.params.version, reqVersionSchema, {root: 'version'});
+				jsvv(req.headers['content-type'], {type: String, required: true, pattern: /^multipart\/form-data/}, {root: 'headers.Content-Type'});
+				
+				if (!req.file || !req.file.size || !req.file.path) throw new AppError('Body is empty', 400);
+			},
+			req => releasesModel.saveRelease({
+				version:   req.params.version,
+				filePath:  req.file.path,
+				fileName:  req.headers['x-file-name'] || req.file.originalname,
+				isPrivate: req.headers.hasOwnProperty('x-private')
+			}),
+			response => jsvv(response, resReleaseInfoSchema, {root: 'releaseInfo'})))
+		.delete(handle(req => {
+				req.params.version = jsvv(req.params.version, reqVersionSchema, {root: 'version'});
+			},
+			async (req, res) => {
+				const info = await releasesModel.deleteRelease({version: req.params.version});
+				
+				if (!info) res[IS_EMPTY] = true;
+				return info;
+			},
+			response => jsvv(response, resReleaseInfoSchema, {root: 'releaseInfo'})))
+		.all(methodNotAllowedHandler);
+	
+	router.route('/:version/info')
+		.get(handle(req => {
+				req.params.version = jsvv(req.params.version, reqVersionSchema, {root: 'version'});
+			},
+			req => releasesModel.getReleaseInfo({version: req.params.version}),
+			response => jsvv(response, resReleaseInfoSchema, {root: 'releaseInfo'})))
+		.all(methodNotAllowedHandler);
+	
+	return router;
+};

src/models/releases.js

+'use strict';
+
+const fs          = require('fs');
+const path        = require('path');
+const {promisify} = require('util');
+
+const del    = require('del');
+const mkdirp = require('mkdirp');
+const semver = require('semver');
+
+const fsRename    = promisify(fs.rename);
+const fsStat      = promisify(fs.stat);
+const fsReadDir   = promisify(fs.readdir);
+const fsReadFile  = promisify(fs.readFile);
+const fsWriteFile = promisify(fs.writeFile);
+const mkdirpAsync = promisify(mkdirp);
+
+const RELEASE_INFO_FILENAME = 'info.json';
+
+module.exports = function ({filesDir = '/files', tmpFilesDir = path.join(filesDir, '.tmp')} = {}) {
+	const FILES_DIR     = filesDir;
+	const TMP_FILES_DIR = tmpFilesDir;
+	
+	return {
+		FILES_DIR,
+		TMP_FILES_DIR,
+		
+		deleteRelease,
+		getAllReleases,
+		getReleaseFilePath,
+		getReleaseInfo,
+		saveRelease
+	};
+	
+	async function deleteRelease({version}) {
+		const info = await getReleaseInfo({version});
+		
+		await del(getReleaseDir({version}), {force: true});
+		
+		return info;
+	}
+	
+	async function determineLatestVersion() {
+		const versions = await getAllVersions();
+		
+		for (const version of versions) {
+			const info = await getReleaseInfo({version});
+			if (!info.private) return version;
+		}
+		return null;
+	}
+	
+	async function isVersionExists({version}) {
+		if (!version) return false;
+		
+		try {
+			await fsStat(getReleaseDir({version}));
+			return true;
+		} catch (e) {
+			if (e.code === 'ENOENT') return false;
+			else throw e;
+		}
+	}
+	
+	async function getAllReleases() {
+		return Promise.all((await getAllVersions())
+			.map(version => getReleaseInfo({version})));
+	}
+	
+	async function getAllVersions() {
+		return (await fsReadDir(FILES_DIR))
+			.filter(s => !s.startsWith('.'))
+			.sort(semver.rcompare);
+	}
+	
+	function getReleaseDir({version}) {
+		return path.join(FILES_DIR, version);
+	}
+	
+	async function getReleaseFilePath({version}) {
+		if (version === 'latest') version = await determineLatestVersion();
+		
+		const info = await getReleaseInfo({version});
+		return info
+			? path.join(getReleaseDir({version}), info.fileName)
+			: null;
+	}
+	
+	async function getReleaseInfo({version}) {
+		if (version === 'latest') version = await determineLatestVersion();
+		
+		return (await isVersionExists({version}))
+			? JSON.parse(await fsReadFile(path.join(getReleaseDir({version}), RELEASE_INFO_FILENAME), {encoding: 'utf8'}))
+			: null;
+	}
+	
+	async function saveRelease({version, filePath, fileName, isPrivate}) {
+		const releaseDir  = getReleaseDir({version});
+		const newFilePath = path.join(releaseDir, fileName);
+		
+		await deleteRelease({version});
+		await mkdirpAsync(releaseDir);
+		
+		await fsRename(filePath, newFilePath);
+		await fsWriteFile(path.join(releaseDir, RELEASE_INFO_FILENAME), JSON.stringify({
+			version,
+			publishDate: new Date(),
+			fileName,
+			fileSize: (await fsStat(newFilePath)).size,
+			private:  !!isPrivate || undefined
+		}));
+		
+		return getReleaseInfo({version});
+	}
+};

src/schemas/primitives/date.js

+'use strict';
+
+module.exports = {
+	type:     Date,
+	required: true,
+	transformsBefore: [
+		value => (value && Number.isInteger(Date.parse(value))) ? new Date(value) : value
+	]
+};

src/schemas/primitives/file-name.js

+'use strict';
+
+module.exports = {
+	type:       String,
+	required:   true,
+	minLength:  1,
+	transforms: [String.prototype.trim]
+};

src/schemas/primitives/version.js

+'use strict';
+
+const semver = require('semver');
+
+module.exports = {
+	type:       String,
+	required:   true,
+	minLength:  1,
+	transforms: [String.prototype.trim],
+	validator:  version => !!semver.valid(version) || {expected: 'valid SemVer version', actual: version}
+};

src/schemas/request-version.js

+'use strict';
+
+const versionSchema  = require('./primitives/version');
+
+module.exports = [
+	{
+		type:     ['latest'],
+		required: true
+	},
+	versionSchema
+];

src/schemas/response-release-info.js

+'use strict';
+
+const {pick} = require('../utils/util');
+
+const dateSchema     = require('./primitives/date');
+const fileNameSchema = require('./primitives/file-name');
+const versionSchema  = require('./primitives/version');
+
+module.exports = [
+	{
+		type:     Object,
+		required: true,
+		properties: {
+			version:     versionSchema,
+			publishDate: dateSchema,
+			fileName:    fileNameSchema,
+			fileSize: {
+				type:     Number,
+				required: true,
+				min:      0
+			},
+			private: {
+				type: [true]
+			}
+		},
+		transformsAfter: [
+			pick('version', 'publishDate', 'fileName', 'fileSize', 'private')
+		]
+	}, {
+		type:     null,
+		required: true
+	}
+];

src/utils/api.js

+'use strict';
+
+const IS_EMPTY = Symbol('isEmpty');
+
+module.exports = {
+	
+	SYMBOLS: {
+		IS_EMPTY
+	},
+	
+	handle(requestValidator, handler, responseValidator) {
+		return async function (req, res, next) {
+			const nextWatcher = new NextWatcher(next);
+			const _next = nextWatcher.watcher.bind(nextWatcher);
+			
+			let response;
+			
+			if (requestValidator) {
+				try {
+					await requestValidator(req, res, _next);
+					if (nextWatcher.wasCalled) return nextWatcher.doNext();
+				} catch (e) { // Probably bad request
+					return res.status(400)
+						.set('Content-Type', 'text/plain')
+						.send(e.message);
+				}
+			}
+			
+			if (handler) {
+				try {
+					response = await handler(req, res, _next);
+					if (nextWatcher.wasCalled) return nextWatcher.doNext();
+				} catch (e) { // Operation error
+					const code = e.code || (e.response && e.response.code);
+					if (/^4\d\d/.test(code)) return res.status(code)
+						.set('Content-Type', 'text/plain')
+						.send(e.message);
+					
+					return next(e);
+				}
+			}
+			
+			if (responseValidator) {
+				try {
+					response = await responseValidator(response, req, res, _next);
+					if (nextWatcher.wasCalled) return nextWatcher.doNext();
+				} catch (e) { // Probably bad response
+					return next(e);
+				}
+			}
+			
+			if (!response && !res[IS_EMPTY]) return res.status(404).send();
+			
+			if (res[IS_EMPTY] || [204, 304].includes(res.statusCode)) response = null;
+			
+			res.status(res.statusCode || 200)
+				.send((typeof response === 'number') ? String(response) : response);
+		}
+	},
+	
+	methodNotAllowed(router) {
+		return function (req, res) {
+			const layer = router.stack.filter(layer => layer.path === req.path)[0];
+			if (!layer) return res.status(404).send();
+			
+			const routeMethods = Object.keys(layer.route.methods);
+			const allowedMethods = routeMethods
+				.filter(method => method[0] !== '_')
+				.map(method => method.toUpperCase())
+				.join(', ');
+			
+			return res.status(405).set('Allow', allowedMethods).send();
+		};
+	}
+	
+};
+
+class NextWatcher {
+	constructor(next) {
+		this._next     = next;
+		this.wasCalled = false;
+	}
+	
+	doNext() {
+		return this._next(...this._passedArgs);
+	}
+	
+	watcher(...args) {
+		this._passedArgs = args;
+		this.wasCalled   = true;
+	}
+}

src/utils/errors.js

+'use strict';
+
+class AppError extends Error {
+	
+	constructor(message, code = 500, cause) {
+		super(message);
+		
+		if (Error.captureStackTrace) {
+			Error.captureStackTrace(this, AppError);
+		}
+		
+		this.name  = this.constructor.name;
+		this.code  = code;
+		this.cause = cause;
+	}
+	
+}
+
+module.exports = {
+	AppError
+};

src/utils/util.js

+'use strict';
+
+const _pick = require('lodash.pick');
+
+module.exports = {
+	
+	pick(...props) {
+		return object => (object && typeof object === 'object')
+			? _pick(object, props)
+			: object;
+	}
+	
+};

test/api/_server.js

+'use strict';
+
+const express = require('express');
+
+const app = express()
+	.use(require('../../src/apis')())
+	.use((req, res) => {
+		console.warn(`${req.url} was not handled`);
+		res.status(404).set('Content-Type', 'text/plain').send(`${req.url} was not handled`);
+	})
+	.use((err, req, res, next) => {
+		console.error(err);
+		if (!res.finished) res.status(500).set('Content-Type', 'text/plain').send(err.stack);
+	});
+
+let server;
+
+module.exports = {
+	
+	start() {
+		return new Promise(resolve => {
+			server = app.listen(80, () => {
+				console.info('Server is started.');
+				resolve();
+			});
+		});
+	},
+	
+	stop() {
+		return new Promise((resolve, reject) => {
+			server.close(err => {
+				if (err) {
+					console.error('Can\'t stop the server');
+					return reject(err);
+				}
+				
+				console.info('Server is stopped');
+				resolve();
+			});
+		});
+	}
+	
+};

test/api/index.js

+'use strict';
+
+const test     = require('ava');
+const axios    = require('axios');
+const FormData = require('form-data');
+
+const server = require('./_server');
+
+test.serial.before(async () => {
+	await server.start();
+});
+
+test.serial('There should be no releases', async t => {
+	const {data: releases} = await axios.get('http://api/releases');
+	
+	t.deepEqual(releases, []);
+});
+
+test.serial('There should be no latest release', async t => {
+	try {
+		await axios.get('http://api/latest');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('There should be no latest release info', async t => {
+	try {
+		await axios.get('http://api/latest/info');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('Create release', async t => {
+	const formData = getFormData({fileName: 'file.txt'});
+	
+	const {data: info} = await axios.put(`http://api/1.0.0`, formData, {
+		headers: formData.getHeaders()
+	});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'file.txt'
+	});
+});
+
+test.serial('Try to create release w/ invalid SemVer version', async t => {
+	const formData = getFormData({fileName: 'file.txt'});
+	
+	try {
+		await axios.put(`http://api/1`, formData, {
+			headers: formData.getHeaders()
+		});
+	} catch (e) {
+		t.is(e.response.status, 400);
+	}
+});
+
+test.serial('Try to create release w/ empty body', async t => {
+	try {
+		await axios.put(`http://api/1`);
+	} catch (e) {
+		t.is(e.response.status, 400);
+	}
+});
+
+test.serial('Create release specifying different file name', async t => {
+	const formData = getFormData({fileName: 'file.txt'});
+	
+	const {data: info} = await axios.put(`http://api/1.1.0`, formData, {
+		headers: {
+			...formData.getHeaders(),
+			'X-File-Name': 'release.txt'
+		}
+	});
+	testReleaseInfo(t, info, {
+		version:  '1.1.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Create private release', async t => {
+	const formData = getFormData({fileName: 'file.txt'});
+	
+	const {data: info} = await axios.put(`http://api/2.0.0-beta`, formData, {
+		headers: {
+			...formData.getHeaders(),
+			'X-Private': true
+		}
+	});
+	testReleaseInfo(t, info, {
+		version:  '2.0.0-beta',
+		fileName: 'file.txt'
+	});
+});
+
+test.serial('Update release', async t => {
+	const formData = getFormData({fileName: 'release.txt'});
+	
+	const {data: info} = await axios.put(`http://api/1.0.0`, formData, {
+		headers: formData.getHeaders()
+	});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Get release info', async t => {
+	const {data: info} = await axios.get('http://api/1.0.0/info');
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Download release', async t => {
+	const {data} = await axios.get('http://api/1.0.0');
+	t.is(data, 'Hello, World!');
+});
+
+test.serial('Get latest release info', async t => {
+	const {data: info} = await axios.get('http://api/latest/info');
+	testReleaseInfo(t, info, {
+		version:  '1.1.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Download latest release', async t => {
+	const {data} = await axios.get('http://api/latest');
+	t.is(data, 'Hello, World!');
+});
+
+test.serial('Get release info of invalid SemVer version', async t => {
+	try {
+		await axios.get('http://api/1/info');
+	} catch (e) {
+		t.is(e.response.status, 400);
+	}
+});
+
+test.serial('Download release of invalid SemVer version', async t => {
+	try {
+		await axios.get('http://api/1');
+	} catch (e) {
+		t.is(e.response.status, 400);
+	}
+});
+
+test.serial('Get all releases', async t => {
+	const {data: releases} = await axios.get('http://api/releases');
+	const expectedReleases = [
+		{
+			version:  '2.0.0-beta',
+			fileName: 'file.txt',
+			private:  true
+		}, {
+			version:  '1.1.0',
+			fileName: 'release.txt'
+		}, {
+			version:  '1.0.0',
+			fileName: 'release.txt'
+		}
+	];
+	
+	t.is(releases.length, expectedReleases.length);
+	for (let i = 0; i < releases.length; i++) {
+		testReleaseInfo(t, releases[i], expectedReleases[i]);
+	}
+});
+
+test.serial('Delete release', async t => {
+	const {data: info} = await axios.delete('http://api/1.0.0');
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Delete private release', async t => {
+	const {data: info} = await axios.delete('http://api/2.0.0-beta');
+	testReleaseInfo(t, info, {
+		version:  '2.0.0-beta',
+		fileName: 'file.txt'
+	});
+});
+
+test.serial('Delete last release', async t => {
+	const {data: info} = await axios.delete('http://api/1.1.0');
+	testReleaseInfo(t, info, {
+		version:  '1.1.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('There should be no releases after deletion of all releases', async t => {
+	const {data: releases} = await axios.get('http://api/releases');
+	
+	t.deepEqual(releases, []);
+});
+
+test.serial('There should be no latest release after deletion of all releases', async t => {
+	try {
+		await axios.get('http://api/latest');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('There should be no latest release info after deletion of all releases', async t => {
+	try {
+		await axios.get('http://api/latest/info');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('Get release info of non-existing version', async t => {
+	try {
+		await axios.get('http://api/1.0.0/info');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('Download release of non-existing version', async t => {
+	try {
+		await axios.get('http://api/1.0.0');
+	} catch (e) {
+		t.is(e.response.status, 404);
+	}
+});
+
+test.serial('Delete non-existing release', async t => {
+	const {data: info} = await axios.delete('http://api/1.0.0');
+	
+	t.falsy(info);
+});
+
+test.serial.after.always(async () => {
+	await server.stop();
+});
+
+
+
+function getFormData({fileName}) {
+	const formData = new FormData();
+	formData.append('file', 'Hello, World!', fileName);
+	
+	return formData;
+}
+
+function testReleaseInfo(t, actual, expected) {
+	t.truthy(actual);
+	t.is(actual.version,  expected.version);
+	t.is(actual.fileName, expected.fileName);
+	t.is(actual.fileSize, 13);
+	t.true(Date.now() - new Date(actual.publishDate) < 100);
+}

test/model/index.js

+'use strict';
+
+const fs   = require('fs');
+const path = require('path');
+
+const test   = require('ava');
+const del    = require('del');
+const mkdirp = require('mkdirp');
+
+const releasesModel = require('../../src/models/releases')();
+
+test.serial.before(t => {
+	del.sync('/files/**', {dot: true, force: true});
+	
+	t.deepEqual(fs.readdirSync(releasesModel.FILES_DIR), []);
+});
+
+test.serial('There should be no releases', async t => {
+	const info = await releasesModel.getAllReleases();
+	t.deepEqual(info, []);
+});
+
+test.serial('There should be no latest release', async t => {
+	const info = await releasesModel.getReleaseInfo({version: 'latest'});
+	t.is(info, null);
+	
+	t.is(await releasesModel.getReleaseFilePath({version: 'latest'}), null);
+});
+
+test.serial('Create release', async t => {
+	const filePath = createTestFile();
+
+	const info = await releasesModel.saveRelease({
+		version: '1.0.0',
+		filePath,
+		fileName: 'file.txt'
+	});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'file.txt'
+	});
+});
+
+test.serial('Create private release', async t => {
+	const filePath = createTestFile();
+	
+	const info = await releasesModel.saveRelease({
+		version: '2.0.0-beta',
+		filePath,
+		fileName:  'file.txt',
+		isPrivate: true
+	});
+	testReleaseInfo(t, info, {
+		version:  '2.0.0-beta',
+		fileName: 'file.txt',
+		private:  true
+	});
+});
+
+test.serial('Update release', async t => {
+	const filePath = createTestFile();
+	
+	const info = await releasesModel.saveRelease({
+		version: '1.0.0',
+		filePath,
+		fileName: 'release.txt'
+	});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Get release info', async t => {
+	const info = await releasesModel.getReleaseInfo({version: '1.0.0'});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+	
+	t.is(await releasesModel.getReleaseFilePath({version: '1.0.0'}),
+	     path.join(releasesModel.FILES_DIR, '1.0.0', 'release.txt'));
+});
+
+test.serial('Temp folder should be empty', t => {
+	t.deepEqual(fs.readdirSync(releasesModel.TMP_FILES_DIR), []);
+});
+
+test.serial('Get all releases', async t => {
+	const releases = await releasesModel.getAllReleases();
+	const expectedReleases = [
+		{
+			version:  '2.0.0-beta',
+			fileName: 'file.txt',
+			private:  true
+		}, {
+			version:  '1.0.0',
+			fileName: 'release.txt'
+		}
+	];
+	
+	t.is(releases.length, expectedReleases.length);
+	for (let i = 0; i < releases.length; i++) {
+		testReleaseInfo(t, releases[i], expectedReleases[i]);
+	}
+});
+
+test.serial('Delete release', async t => {
+	const info = await releasesModel.deleteRelease({version: '1.0.0'});
+	testReleaseInfo(t, info, {
+		version:  '1.0.0',
+		fileName: 'release.txt'
+	});
+});
+
+test.serial('Delete private release', async t => {
+	const info = await releasesModel.deleteRelease({version: '2.0.0-beta'});
+	testReleaseInfo(t, info, {
+		version:  '2.0.0-beta',
+		fileName: 'file.txt',
+		private:  true
+	});
+});
+
+test.serial('There should be no releases after deletion of all releases', async t => {
+	const info = await releasesModel.getAllReleases();
+	t.deepEqual(info, []);
+});
+
+test.serial('There should be no latest release after deletion of all releases', async t => {
+	const info = await releasesModel.getReleaseInfo({version: 'latest'});
+	t.is(info, null);
+	
+	t.is(await releasesModel.getReleaseFilePath({version: 'latest'}), null);
+});
+
+test.serial('Releases folder should be empty', t => {
+	t.deepEqual(fs.readdirSync(releasesModel.FILES_DIR), ['.tmp']);
+});
+
+test.serial('Get non-existing release info', async t => {
+	const info = await releasesModel.getReleaseInfo({version: '1.0.0'});
+	t.is(info, null);
+	
+	t.is(await releasesModel.getReleaseFilePath({version: '1.0.0'}), null);
+});
+
+test.serial('Delete non-existing release', async t => {
+	const info = await releasesModel.deleteRelease({version: '1.0.0'});
+	t.is(info, null);
+});
+
+test.serial.after(t => {
+	del.sync('/files/**', {dot: true, force: true});
+	
+	t.deepEqual(fs.readdirSync(releasesModel.FILES_DIR), []);
+});
+
+
+
+function createTestFile() {
+	mkdirp.sync(releasesModel.TMP_FILES_DIR);
+	
+	const randomFileName = `${Math.ceil(Math.random() * Number.MAX_SAFE_INTEGER).toString(36)}.txt`;
+	const filePath       = path.join(releasesModel.TMP_FILES_DIR, randomFileName);
+	
+	fs.writeFileSync(filePath, 'Hello, World!');
+	
+	return filePath;
+}
+
+function testReleaseInfo(t, actual, expected) {
+	t.truthy(actual);
+	t.is(actual.version,  expected.version);
+	t.is(actual.fileName, expected.fileName);
+	t.is(actual.fileSize, 13);
+	t.is(actual.private,  expected.private);
+	t.true(Date.now() - new Date(actual.publishDate) < 100);
+}