Mockito将模拟课堂的最后一场

Question

我正在尝试模拟类学生的最后一个字段

data class Student(
val id: Int,
val name: String,
val marks: Marks
)
data class Marks(
val subject1: String
)

这是我的测试班

class StudentTest {
@Test
fun testStudentMarks() {
val student = mock(Student::class.java)
assertNotNull(student.id)
assertNotNull(student.marks)
}
}

在运行测试时，它通过了student.id，但在student.marks上失败，错误如下

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)

如何模拟标记字段

Answer 1

由于它是一个Kotlin类，您可以只执行

Mockito.when(student.id).thenReturn(0)

或

val m = Mockito.mock(Marks::class.java)
Mockito.when(student.marks).thenReturn(m)