Argument Aggregation in Parameterized Tests in Junit 5

By | October 4, 2020

This post talks about Argument Aggregation supports provided by JUnit Jupiter in the case of  @ParameterizedTest

By default, each argument provided to a @ParameterizedTest method corresponds to a single method parameter. Consequently, argument sources that are expected to supply a large number of arguments can lead to large method signatures.

In that case, an ArgumentsAccessor may be used instead of multiple parameters. Using this API, you can access the provided arguments through a single argument passed to your test method. In addition, type conversion is supported.

Let’s try to understand the above concept using a demo project

pom.xml

Gender.java

Person.java

CsvToPerson.java

ArgumentAggregationInParameterizedTest.java

 

The output of the above project:

 

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That’s all about Argument Aggregation in Parameterized Tests in Junit 5
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