I am trying to mock a final field of class Student
data class Student(
val id: Int,
val name: String,
val marks: Marks
)
data class Marks(
val subject1: String
)
and this is my test class
class StudentTest {
@Test
fun testStudentMarks() {
val student = mock(Student::class.java)
assertNotNull(student.id)
assertNotNull(student.marks)
}
}
On running test it passes student.id but it fails on student.marks with the below error
junit.framework.AssertionFailedError
at junit.framework.Assert.fail(Assert.java:55)
at junit.framework.Assert.assertTrue(Assert.java:22)
at junit.framework.Assert.assertNotNull(Assert.java:256)
at junit.framework.Assert.assertNotNull(Assert.java:248)
at com.example.mockitotest.StudentTest.testStudentMarks(StudentTest.kt:16)
How can I mock marks field
Since it's a Kotlin
class, you can just do
Mockito.when(student.id).thenReturn(0)
or
val m = Mockito.mock(Marks::class.java)
Mockito.when(student.marks).thenReturn(m)