replace mysql module with mysql2

mysql is deprecated since years now

src/test/database-test.js

@@ -1,12 +1,10 @@
-/* global it:false */
-/* global describe:false */
-/* global before:false */
+/* global it, describe, before, after */
 
 'use strict';
 
-const database = require('../database'),
+const BoxError = require('../boxerror.js'),
+    database = require('../database'),
     expect = require('expect.js'),
-    fs = require('fs'),
     safe = require('safetydance');
 
 describe('database', function () {
@@ -24,7 +22,54 @@ describe('database', function () {
         });
     });
 
-    describe('importFromFile', function () {
+    describe('query', function () {
+        before(async () => { await database.initialize(); });
+        after(async () => { await database.uninitialize(); });
+
+        it('basic query', async function () {
+            const result = await database.query('SELECT COUNT(*) as count FROM apps');
+            expect(result[0].count).to.be(0);
+        });
+
+        it('bad queries', async function () {
+            const queries = [
+                'SELECT COUNT(*) FROM oops', // bad table
+                'SELECT', // incomplete
+            ];
+
+            for (const query of queries) {
+                const [error] = await safe(database.query(query));
+                expect(error.reason).to.be(BoxError.DATABASE_ERROR);
+                expect(error.sqlMessage).to.be.a('string');
+            }
+        });
+    });
+
+    describe('transaction', function () {
+        before(async () => { await database.initialize(); });
+        after(async () => { await database.uninitialize(); });
+
+        it('basic transaction', async function () {
+            const results = await database.transaction([
+                { query: 'SELECT COUNT(*) as count FROM apps', args: [] },
+                { query: 'SELECT COUNT(*) as count FROM settings', args: [] },
+            ]);
+            expect(results[0][0].count).to.be(0);
+            expect(results[1][0].count).to.be(0);
+        });
+
+        it('bad transaction', async function () {
+            const [error] = await safe(database.transaction([
+                { query: 'SELECT COUNT(*) as count FROM apps', args: [] },
+                { query: 'stuff', args: [] },
+            ]));
+
+            expect(error.reason).to.be(BoxError.DATABASE_ERROR);
+            expect(error.sqlMessage).to.be.a('string');
+        });
+    });
+
+    describe('import/export', function () {
         before(async function () {
             await database.initialize();
             await database._clear();
@@ -42,5 +87,9 @@ describe('database', function () {
         it('can import from file', async function () {
             await database.importFromFile('/tmp/box.mysqldump');
         });
+
+        it('can uninitialize database', async function () {
+            await database.uninitialize();
+        });
     });
 });