test/sql/test_compiler CRUDTest needs to break out

[Mike Bayer]

into test/sql/test_insert, test/sql/test_update (is there already), test/sql/test_delete.

Also take test/sql/test_generative->InsertTest (or ValuesBaseTest, the name is changing) and put that into test/sql/test_insert. CRUDTest->test_binds_that_match_columns can also go into test_insert->ValuesBaseTest.

all the tests need to get cleaned up fixtures, don't use globals, test one statement per test, etc.

[Former user]

(original author: diana) current compiler coverage:

Name                                           Stmts   Miss  Cover   Missing
----------------------------------------------------------------------------
sqlalchemy.sql.compiler                         1150     61    95%   330, 470, 473, 514, 564, 577, 580, 606, 816, 833, 836-839, 872, 924, 935, 1015, 1080, 1244, 1540, 1574-1575, 1585-1594, 1596, 1612-1613, 1629-1649, 1668-1671, 1780, 1788, 1791, 1795, 1934, 2026, 2065, 2115, 2193, 2226, 2256, 2280, 2397, 2427, 2438

[Former user]

(original author: diana) moved the delete tests in 0f203d57cda4a6b966330f78f181ebb7089e05e9

moved the insert tests in 17487a0db7759b0414e73fc3b9e61672e1da7658

started on update tests in 192bddc7208f2c7f4d5b23a1c5395c3673ce9bb6

moving more update tests in 2ffc92558864dac683907c5166046c59a1cd232c

[Former user]

(original author: diana)