update dialect tests

Author: sandan

test/test_dialect.py

@@ -1,9 +1,64 @@
 from sqlalchemy_teradata.dialect import TeradataDialect
 from sqlalchemy.testing import fixtures
+from sqlalchemy import testing, select
+from sqlalchemy import Table, Column, Integer, String, MetaData, ForeignKey
+from sqlalchemy_teradata.base import CreateView,DropView
 
 class TeradataDialectTest(fixtures.TestBase):
+
     def setup(self):
-        self.dialect = TeradataDialect()
+        self.conn = testing.db.connect()
+        self.engine = self.conn.engine
+        self.dialect = self.conn.dialect
+        self.metadata = MetaData()
+
+        self.user_name = self.engine.execute('sel user').scalar()
+        self.tbl_name = self.user_name + '_test_table'
+        self.view_name = self.user_name + '_test_view'
+
+        # Setup test table (user should have necessary rights to create table)
+        self.test_table = Table(self.tbl_name, self.metadata,
+                                Column('id', Integer, primary_key=True))
+        # Setup a test view 
+        self.test_view = CreateView(self.view_name, select([self.test_table.c.id.label('view_id')]))
+
+        # Create tables
+        self.metadata.create_all(self.engine)
+
+        #Create views
+        self.conn.execute(self.test_view)
+
+    def tearDown(self):
+        # drop view(s)
+        self.conn.execute(DropView(self.view_name))
+
+        # drop table(s)
+        self.metadata.drop_all(self.engine)
+        self.conn.close()
+
+    def test_has_table(self):
+        assert self.dialect.has_table(self.conn, self.test_table.name)
+
+    def test_get_table_names(self):
+        tbls = self.dialect.get_table_names(self.conn)
+        assert self.dialect.normalize_name(self.test_table.name) in tbls
+
+    def test_get_schema_names(self):
+        schemas = self.dialect.get_schema_names(self.conn)
+        assert self.dialect.normalize_name(self.user_name) in schemas
+
+    def test_get_view_names(self):
+        views = self.dialect.get_view_names(self.conn)
+        assert self.dialect.normalize_name(self.test_view.name) in views
+
+    def test_get_pk_constraint(self):
+        assert False
+
+    def test_get_unique_constraint(self):
+        assert False
+
+    def test_get_foreign_keys(self):
+        assert False
 
-    def test_Attrs(self):
-        assert hasattr(self.dialect, 'name')
+    def test_get_indexes(self):
+        assert False