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alternator-test: add stub case for set add duplication

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The test case for adding two sets with common values is added.
This case is a stub, because boto3 transforms the result into a Python
set, which removes duplicates on its own. A proper TODO is left
in order to migrate this case to a lower-level API and check
the returned JSON directly for lack of duplicates.
This commit is contained in:
Piotr Sarna
2019-07-12 12:18:25 +02:00
committed by Nadav Har'El
parent 67c95cb303
commit 336c90daaa
1 changed files with 11 additions and 0 deletions
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11
alternator-test/test_update_expression.py
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@@ -654,6 +654,17 @@ def test_update_expression_add_sets(test_table_s):
UpdateExpression='ADD a :val1',
ExpressionAttributeValues={':val1': set(['pig'])})
assert test_table_s.get_item(Key={'p': p}, ConsistentRead=True)['Item']['a'] == set(['dog', 'cat', 'mouse', 'pig'])
# TODO: right now this test won't detect duplicated values in the returned result,
# because boto3 parses a set out of the returned JSON anyway. This check should leverage
# lower level API (if exists) to ensure that the JSON contains no duplicates
# in the set representation. It has been verified manually.
test_table_s.put_item(Item={'p': p, 'a': set(['beaver', 'lynx', 'coati']), 'b': 'hi'})
test_table_s.update_item(Key={'p': p},
UpdateExpression='ADD a :val1',
ExpressionAttributeValues={':val1': set(['coati', 'beaver', 'badger'])})
assert test_table_s.get_item(Key={'p': p}, ConsistentRead=True)['Item']['a'] == set(['beaver', 'badger', 'lynx', 'coati'])
# The value to be added needs to be a set of the same type - it can't
# be a single element or anything else. If the value has the wrong type,
# we get an error like "Invalid UpdateExpression: Incorrect operand type