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I want to write a unit test for my Kotlin code and use junit/hamcrest matchers, I want to use the is method, but it is a reserved word in Kotlin.
How can I get the following to compile?
class testExample{ @Test fun example(){ assertThat(1, is(equalTo(1)) } } Currently my IDE, InteliJ is highlighting that as a compilation error, saying it is expecting a ) after is?
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Hamcrest is a widely used framework for unit testing in the Java world. Hamcrest target is to make your tests easier to write and read. For this, it provides additional matcher classes which can be used in test for example written with JUnit. You can also define custom matcher implementations.
Hamcrest is the well-known framework used for unit testing in the Java ecosystem. It's bundled in JUnit and simply put, it uses existing predicates – called matcher classes – for making assertions.
assertEquals() is the method of Assert class in JUnit, assertThat() belongs to Matchers class of Hamcrest. Both methods assert the same thing; however, hamcrest matcher is more human-readable. As you see, it is like an English sentence “Assert that actual is equal to the expected value”.
You can alias is to Is (for example), when you import, using the as keyword.
E.g:
import org.hamcrest.CoreMatchers.`is` as Is See https://kotlinlang.org/docs/reference/packages.html
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