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javajunitcollections

JUnit: assert collection contains an element with a certain property

I want to assert (using JUnit and not any other dependencies like hamcrest) if a collection contains an element with a certain property value).

I found this question How do I assert an Iterable contains elements with a certain property? using harmcrest.

One option is to override the equals method to check only the property that I want to compare, but it is not a good solution.

Is there an elegant way to make this using JUnit 4 or should I code it and iterate through the collection to check the value?

Solution

  • Java 8's streams and filtering could actually be quite elegant:

    Collection<SomeObejct> myCollection = /* something */;
boolean hasAny = myCollection.stream().anyMatch(s -> s.getProperty().equals("something"));
assertTrue("Couldn't find an object with the right property", hasAny);