SA14/Tests: Add cratedb-version query parameter to satisfy machinery

Some tests are specifically testing situations with older releases of
corresponding software components. For example, there are tests
validating specific behaviour going back to CrateDB 1.x.

In order to satisfy those tests, a corresponding version string has to
be seeded.

SQLAlchemy 1.4 accepts database connection URIs without hostname, like
`crate://?cratedb-version=4.3.2`. However, this does not work for older
SQLAlchemy releases, so let's use the most common denominator, like
`crate://cratedb.example.org/?cratedb-version=4.3.2`.

Author: amotl

DEVELOP.rst

@@ -33,7 +33,12 @@ Run all tests::
 
 Run specific tests::
 
-    # Ignore all tests below src/crate/testing
+    ./bin/test -vvvv -t SqlAlchemyCompilerTest
+    ./bin/test -vvvv -t test_score
+    ./bin/test -vvvv -t sqlalchemy
+
+Ignore specific test directories::
+
     ./bin/test -vvvv --ignore_dir=testing
 
 You can run the tests against multiple Python interpreters with tox_::

src/crate/client/sqlalchemy/tests/array_test.py

@@ -39,7 +39,7 @@
 class SqlAlchemyArrayTypeTest(TestCase):
 
     def setUp(self):
-        self.engine = sa.create_engine('crate://')
+        self.engine = sa.create_engine('crate://cratedb.example.org/?cratedb-version=4.3.2')
         Base = declarative_base(bind=self.engine)
         self.metadata = sa.MetaData()
 

src/crate/client/sqlalchemy/tests/bulk_test.py

@@ -37,7 +37,7 @@
 class SqlAlchemyBulkTest(TestCase):
 
     def setUp(self):
-        self.engine = sa.create_engine('crate://')
+        self.engine = sa.create_engine('crate://cratedb.example.org/?cratedb-version=4.3.2')
         Base = declarative_base(bind=self.engine)
 
         class Character(Base):

src/crate/client/sqlalchemy/tests/datetime_test.py

@@ -53,7 +53,7 @@ def dst(self, date_time):
 class SqlAlchemyDateAndDateTimeTest(TestCase):
 
     def setUp(self):
-        self.engine = sa.create_engine('crate://')
+        self.engine = sa.create_engine('crate://cratedb.example.org/?cratedb-version=4.3.2')
         Base = declarative_base(bind=self.engine)
 
         class Character(Base):

src/crate/client/sqlalchemy/tests/dict_test.py

@@ -41,7 +41,7 @@ class SqlAlchemyDictTypeTest(TestCase):
 
     def setUp(self):
         # Need to set an appropriate server version.
-        self.engine = sa.create_engine('crate:///?cratedb-version=4.3.2')
+        self.engine = sa.create_engine('crate://cratedb.example.org/?cratedb-version=4.3.2')
         metadata = sa.MetaData()
         self.mytable = sa.Table('mytable', metadata,
                                 sa.Column('name', sa.String),

src/crate/client/sqlalchemy/tests/update_test.py

@@ -41,7 +41,7 @@
 class SqlAlchemyUpdateTest(TestCase):
 
     def setUp(self):
-        self.engine = sa.create_engine('crate://')
+        self.engine = sa.create_engine('crate://cratedb.example.org/?cratedb-version=4.3.2')
         self.base = declarative_base(bind=self.engine)
 
         class Character(self.base):