Circular Buffer exercise

Programming Kotlin
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1

Hi, I’m trying the circular buffer exercise, I’m only on the first test, so I’ve only done the first exception and the first test but I’m getting this error.

In my ide I control the exception in main with try catch, and it works correctly but I don’t know how to do it if I only have the class. As you can see I’m very new, I’m just starting with Kotlin. If someone can guide me on where to look I’d appreciate it.

[ERROR] src/test/kotlin/CircularBufferTest.kt:[51,25] Type argument is not within its bounds: should be subtype of 'Throwable'

My code:

import kotlin.collections.ArrayDeque

// TODO: implement proper exceptions to complete the task
class EmptyBufferException(message: String = "Is Empty") :Exception(message)

class BufferFullException()

class CircularBuffer<T>(private val capacity: Int) {
    // TODO: implement proper constructor to complete the task
        val deque = ArrayDeque<T>()

    fun read() : T {
        if (deque.isEmpty())
            throw EmptyBufferException("EmptyBufferException")
        return deque.first()
    }

    fun write(value: T) {
        TODO("Implement this function to complete the task")

    }

    fun overwrite(value: T) {
        TODO("Implement this function to complete the task")
    }

    fun clear() {
        TODO("Implement this function to complete the task")
    }
}
2

I edited your post to add codeblocks :slight_smile: It’s much easier to read now.

3

Thanks, I’ll use it next time.