TST: consolidate remaining tests under pandas.tests

move all remaining tests so that ALL tests are now
under pandas/tests

Author: Jeff Reback <jeff@reback.net>

Closes pandas-dev#15371 from jreback/tests and squashes the following commits:

43039e4 [Jeff Reback] add in data
118127b [Jeff Reback] wip
bfa6a9c [Jeff Reback] fix data locations
79a79e6 [Jeff Reback] fix import
57437bf [Jeff Reback] fixes
b407586 [Jeff Reback] move io
e13bfe3 [Jeff Reback] move tools
0194e31 [Jeff Reback] move computation
0e6bcb4 [Jeff Reback] rename test_msgpack -> msgpack
c5e4ab8 [Jeff Reback] move sparse
42e60e2 [Jeff Reback] move api tests

pandas/api/tests/test_api.py → pandas/tests/api/test_api.py

@@ -133,7 +133,7 @@ def test_api(self):
 
 class TestApi(Base, tm.TestCase):
 
-    allowed = ['tests', 'types']
+    allowed = ['types']
 
     def test_api(self):
 

pandas/tests/indexes/datetimes/test_ops.py

@@ -1245,7 +1245,8 @@ def test_shift(self):
         self.assertEqual(shifted[0], self.rng[0])
         self.assertEqual(shifted.offset, self.rng.offset)
 
-        with tm.assert_produces_warning(PerformanceWarning):
+        # PerformanceWarning
+        with warnings.catch_warnings(record=True):
             rng = date_range(START, END, freq=BMonthEnd())
             shifted = rng.shift(1, freq=CDay())
             self.assertEqual(shifted[0], rng[0] + CDay())

pandas/io/tests/test_packers.py → pandas/tests/io/test_packers.py

@@ -795,7 +795,7 @@ class TestMsgpack():
 
     @classmethod
     def setup_class(cls):
-        from pandas.io.tests.generate_legacy_storage_files import (
+        from pandas.tests.io.generate_legacy_storage_files import (
             create_msgpack_data, create_data)
         cls.data = create_msgpack_data()
         cls.all_data = create_data()

pandas/io/tests/test_pickle.py → pandas/tests/io/test_pickle.py

@@ -33,7 +33,7 @@ class TestPickle():
 
     @classmethod
     def setup_class(cls):
-        from pandas.io.tests.generate_legacy_storage_files import (
+        from pandas.tests.io.generate_legacy_storage_files import (
             create_pickle_data)
         cls.data = create_pickle_data()
         cls.path = u('__%s__.pickle' % tm.rands(10))