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alternator-test: add test for reading key before write

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The test case checks if reading keys in order to use their values
in read-before-write updates works fine.
This commit is contained in:
Piotr Sarna
2019-07-09 12:22:19 +02:00
committed by Nadav Har'El
parent 7b605d5bec
commit e482f27e2f
1 changed files with 10 additions and 0 deletions
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10
alternator-test/test_update_expression.py
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@@ -69,6 +69,16 @@ def test_update_expression_set_nested_copy(test_table_s):
ExpressionAttributeNames={'#nnnn': 'nnnn', '#nnn': 'nnn'}, ExpressionAttributeValues={':val1': [1,3]})
assert test_table_s.get_item(Key={'p': p}, ConsistentRead=True)['Item'] == {'p': p, 'n': 2, 'nn': 5, 'nnn': [2,4], 'nnnn': [1,3,2,4]}
# Test for getting a key value with read-before-write
def test_update_expression_set_key(test_table_sn):
p = random_string()
test_table_sn.update_item(Key={'p': p, 'c': 7});
test_table_sn.update_item(Key={'p': p, 'c': 7}, UpdateExpression='SET #n = #p',
ExpressionAttributeNames={'#n': 'n', '#p': 'p'})
test_table_sn.update_item(Key={'p': p, 'c': 7}, UpdateExpression='SET #nn = #c + #c',
ExpressionAttributeNames={'#nn': 'nn', '#c': 'c'})
assert test_table_sn.get_item(Key={'p': p, 'c': 7}, ConsistentRead=True)['Item'] == {'p': p, 'c': 7, 'n': p, 'nn': 14}
# Simple test for the "REMOVE" action
def test_update_expression_remove(test_table_s):
p = random_string()