Hamcrest quiz

Test your Hamcrest knowledge with a free interactive quiz — 20 questions with answers and explanations. No signup needed to play.

What does `containsString()` check, as opposed to `equalTo()`, when asserting on a String?

1. What does `containsString()` check, as opposed to `equalTo()`, when asserting on a String?
2. What is Hamcrest?
3. What does `empty()` (and `emptyCollectionOf(Class)`) check?
4. What does the `not()` matcher do?
5. What is the basic syntax pattern for a Hamcrest assertion?
6. What does `containsInAnyOrder()` provide that plain `contains()` doesn't?
7. Why might a team prefer AssertJ's fluent assertions (`assertThat(value).isEqualTo(...).isGreaterThan(...)`) over Hamcrest in a newer Java codebase?
8. What does the `is()` matcher do in Hamcrest, e.g. `assertThat(value, is(5))`?
9. What is a practical downside of over-relying on very generic matchers like `notNullValue()` or `anything()` in tests?
10. What is `hasSize()` used for on a collection or array assertion?
11. What does `instanceOf()` (or `isA()`) check?
12. How do you combine multiple conditions in a single Hamcrest assertion, e.g. requiring a value be both greater than 5 AND less than 10?

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