Jetbrains IDE code template for JUnit tests written in Kotlin.

KoltinUnitTestTemplate.kt

package ${PACKAGE_NAME}

import com.nhaarman.mockitokotlin2.verify
import com.nhaarman.mockitokotlin2.whenever
import org.assertj.core.api.Assertions.assertThat
import org.junit.Before
import org.junit.Test
import org.junit.runner.RunWith
import org.mockito.Mock
import org.mockito.junit.MockitoJUnitRunner

@RunWith(MockitoJUnitRunner::class)
class ${NAME}Test {
   @Mock
   private lateinit var dependency: Dependency
    
   private lateinit var sut: ${NAME}Test

    @Before
    fun setUp() {
        sut = ${NAME}Test(dependency)
    }

    @Test
    fun `foo SHOULD do something WHEN precondition`(){
        whenever(dependency.bar()).thenResult("")
        val expectedResult = "a String"
        
        val result = sut.foo()
        
        assertThat(result).isEqualTo(expectedResult)
        verify(dependency).bar()
    }
}