Lookup matches

A lookup-matches test must be considered when you want to be sure that some values found in a the candidate result-sets are the same than values found in the reference result-sets.

At the opposite of equivalence’s tests, lookup’s tests don’t require the uniqueness of the rows in the reference or candidate result-sets. If a row from the candidate result-set has one or more matching keys in the reference table then the values associated to one of these matches must be equal in the reference result-set and candidate result-set. If a row from the candidate result-set has no matching key in the reference result-set, it’s not considered as an issue for the test and this row will be considered as successful.

System-under-test

The system under-test is any result-set representing the candidate table.

Assertion

The assertion is defined by the xml element lookup-matches. Some parts of the assertion are identical to the parts defined for the lookup-exists test. See jointure and Reference result-set for more information.

Inclusion

In addition to the keys defined in the join element, the test is expecting to define the values that must be compared int the two result-sets. At the moment, NBi is supporting strict equality and is not supporting tolerance when comparing the values of the reference and candidate result-sets.

The definition of the mapping between the columns of the two result-sets are defined with the help of the mapping or using elements.

<assert>
  <lookup-matches>
    <join>
      <mapping candidate="DepartmentID" reference="Id" type="numeric"/>
    </join>
    <inclusion>
      <mapping candidate="DepartmentName" reference="Name" type="text"/>
    </inclusion>
    <result-set>
      <query>
        select [DepartmentID] as Id, [Name] from [HumanResources].[Department]
      </query>
    </result-set>
  </lookup-matches>
</assert>

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