SQL Lab - A multi-tab SQL editor (#514)

* Carapal react mockup

This is really just a mock up written in React to try different
components. It could become scaffolding to build a prototype, or not.

* Merging in Alanna's theme tweaks for SQL lab

* Tweak the display of the alert message in navbar

* Sketching the middleware refresh for Queries

* Adjustments

* Implement timer sync.

* CTAS

* Refactor the queries to be stored as a dict. (#994)

* Download csv endpoint. (#992)

* CSV download engdpoint.

* Use lower case booleans.

* Replcate loop with the object lookup by key.

* First changes for the sync

* Address comments

* Fix query deletions. Update only the queries from the store.

* Sync queries using tmp_id.

* simplify

* Fix the tests in the carapal. (#1023)

* Sync queries using tmp_id.

* Fix the unit tests

* Bux fixes. Pass 2.

* Tweakin' & linting

* Adding alpha label to the SQL LAb navbar entry

* Fixing the python unit tests

tests/base_tests.py

@@ -0,0 +1,93 @@
+"""Unit tests for Caravel"""
+from __future__ import absolute_import
+from __future__ import division
+from __future__ import print_function
+from __future__ import unicode_literals
+
+import os
+import unittest
+
+from flask_appbuilder.security.sqla import models as ab_models
+
+import caravel
+from caravel import app, db, models, utils, appbuilder
+
+os.environ['CARAVEL_CONFIG'] = 'tests.caravel_test_config'
+
+'''
+app.config['TESTING'] = True
+app.config['CSRF_ENABLED'] = False
+app.config['SECRET_KEY'] = 'thisismyscretkey'
+app.config['WTF_CSRF_ENABLED'] = False
+app.config['PUBLIC_ROLE_LIKE_GAMMA'] = True
+'''
+BASE_DIR = app.config.get("BASE_DIR")
+
+
+class CaravelTestCase(unittest.TestCase):
+
+    def __init__(self, *args, **kwargs):
+        super(CaravelTestCase, self).__init__(*args, **kwargs)
+        self.client = app.test_client()
+
+        utils.init(caravel)
+
+        admin = appbuilder.sm.find_user('admin')
+        if not admin:
+            appbuilder.sm.add_user(
+                'admin', 'admin', ' user', 'admin@fab.org',
+                appbuilder.sm.find_role('Admin'),
+                password='general')
+
+        gamma = appbuilder.sm.find_user('gamma')
+        if not gamma:
+            appbuilder.sm.add_user(
+                'gamma', 'gamma', 'user', 'gamma@fab.org',
+                appbuilder.sm.find_role('Gamma'),
+                password='general')
+
+        alpha = appbuilder.sm.find_user('alpha')
+        if not alpha:
+            appbuilder.sm.add_user(
+                'alpha', 'alpha', 'user', 'alpha@fab.org',
+                appbuilder.sm.find_role('Alpha'),
+                password='general')
+
+        utils.init(caravel)
+
+    def login(self, username='admin', password='general'):
+        resp = self.client.post(
+            '/login/',
+            data=dict(username=username, password=password),
+            follow_redirects=True)
+        assert 'Welcome' in resp.data.decode('utf-8')
+
+    def get_query_by_sql(self, sql):
+        session = db.create_scoped_session()
+        query = session.query(models.Query).filter_by(sql=sql).first()
+        session.close()
+        return query
+
+    def logout(self):
+        self.client.get('/logout/', follow_redirects=True)
+
+    def test_welcome(self):
+        self.login()
+        resp = self.client.get('/caravel/welcome')
+        assert 'Welcome' in resp.data.decode('utf-8')
+
+    def setup_public_access_for_dashboard(self, table_name):
+        public_role = appbuilder.sm.find_role('Public')
+        perms = db.session.query(ab_models.PermissionView).all()
+        for perm in perms:
+            if (perm.permission.name == 'datasource_access' and
+                    perm.view_menu and table_name in perm.view_menu.name):
+                appbuilder.sm.add_permission_role(public_role, perm)
+
+    def revoke_public_access(self, table_name):
+        public_role = appbuilder.sm.find_role('Public')
+        perms = db.session.query(ab_models.PermissionView).all()
+        for perm in perms:
+            if (perm.permission.name == 'datasource_access' and
+                    perm.view_menu and table_name in perm.view_menu.name):
+                appbuilder.sm.del_permission_role(public_role, perm)