Implemented ExpectColumnTypeToBe expectation (file path: great_expectations/expectations/core/expect_column_type_to_be.py) and added integration test file (file path: tests/integration/data_sources_and_expectations/expectations/test_expect_column_type_to_be.py). Modified great_expectations/expectations/__init__.py and great_expectations/expectations/core/__init__.py to register new expectation.

Author: Mansib Rahman

great_expectations/expectations/__init__.py

@@ -19,6 +19,7 @@
     ExpectColumnStdevToBeBetween,
     ExpectColumnSumToBeBetween,
     ExpectColumnToExist,
+    ExpectColumnTypeToBe,
     ExpectColumnUniqueValueCountToBeBetween,
     ExpectColumnValueLengthsToBeBetween,
     ExpectColumnValueLengthsToEqual,

great_expectations/expectations/core/__init__.py

@@ -34,6 +34,7 @@
 from .expect_column_stdev_to_be_between import ExpectColumnStdevToBeBetween
 from .expect_column_sum_to_be_between import ExpectColumnSumToBeBetween
 from .expect_column_to_exist import ExpectColumnToExist
+from .expect_column_type_to_be import ExpectColumnTypeToBe
 from .expect_column_unique_value_count_to_be_between import (
     ExpectColumnUniqueValueCountToBeBetween,
 )