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javahamcrest

Shazamcrest custom matching with collections

With Shazamcrest is is possible to do custom matching by supplying a field path and a matcher that is then applied to that field.

For example[cf]: 

assertThat(
  actualPerson,
  sameBeanAs(expectedPerson).with("address.streetName", startsWith("Via"));

How do you do the same if you are matching collections? Can you apply a custom matcher to each object in the collection? To all objects in the collection?

Solution

  • Assuming Shazamcrest matchers work just like regular Hamcrest matchers, you should be able to use them with all of the built-in collection matchers.

    assertThat(
  people,
  contains(
    sameBeanAs(expectedPerson).with("address.streetName", startsWith("Via")
  )
);

    The documentation says that you must use a custom assertThat from the package. While that's only for the failure descriptions, it may interfere with using some matchers.