lm-tecniche-di-programmazione/src/test/kotlin/it/norangeb/algorithms/exam/ThreeWayHeapTest.kt

/*
 * MIT License
 *
 * Copyright (c) 2019 norangebit
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
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package it.norangeb.algorithms.exam

import arrow.core.None
import arrow.core.Some
import org.amshove.kluent.`should equal`
import org.spekframework.spek2.Spek
import org.spekframework.spek2.style.gherkin.Feature

object ThreeWayHeapTest : Spek({
    Feature("three way heap") {
        Scenario("min heap") {
            val heap by memoized { ThreeWayHeap.createMinHeap<Int>() }

            When("add 23, 12, 45 into heap") {
                heap.insert(12)
                heap.insert(45)
                heap.insert(23)
            }

            Then("pop should equal 12") {
                heap.pop() `should equal` Some(12)
            }

            Then("peek should equal 23") {
                heap.peek() `should equal` Some(23)
            }

            When("add 25, 33, 24, 11, 15, 18, 34, 12 into heap") {
                heap.insert(25)
                heap.insert(18)
                heap.insert(11)
                heap.insert(33)
                heap.insert(24)
                heap.insert(12)
                heap.insert(15)
                heap.insert(34)
            }

            Then("pop should equal 11") {
                heap.pop() `should equal` Some(11)
            }

            Then("pop should equal 12") {
                heap.pop() `should equal` Some(12)
            }

            When("add 30, 10, 12, 5, 3, 8, 9, 2, 11") {
                heap.insert(12)
                heap.insert(8)
                heap.insert(3)
                heap.insert(30)
                heap.insert(2)
                heap.insert(10)
                heap.insert(5)
                heap.insert(11)
                heap.insert(9)
            }

            Then("pop should equal 2") {
                heap.pop() `should equal` Some(2)
            }

            Then("pop should equal 3") {
                heap.pop() `should equal` Some(3)
            }

            Then("pop should equal 5") {
                heap.pop() `should equal` Some(5)
            }

            Then("pop should equal 8") {
                heap.pop() `should equal` Some(8)
            }

            Then("pop should equal 9") {
                heap.pop() `should equal` Some(9)
            }

            Then("pop should equal 10") {
                heap.pop() `should equal` Some(10)
            }

            Then("pop should equal 11") {
                heap.pop() `should equal` Some(11)
            }

            Then("pop should equal 12") {
                heap.pop() `should equal` Some(12)
            }

            Then("pop should equal 15") {
                heap.pop() `should equal` Some(15)
            }

            Then("pop should equal 18") {
                heap.pop() `should equal` Some(18)
            }

            Then("pop should equal 23") {
                heap.pop() `should equal` Some(23)
            }

            Then("pop should equal 24") {
                heap.pop() `should equal` Some(24)
            }

            Then("pop should equal 25") {
                heap.pop() `should equal` Some(25)
            }

            Then("pop should equal 30") {
                heap.pop() `should equal` Some(30)
            }

            Then("pop should equal 33") {
                heap.pop() `should equal` Some(33)
            }

            Then("pop should equal 34") {
                heap.pop() `should equal` Some(34)
            }

            Then("pop should equal 45") {
                heap.pop() `should equal` Some(45)
            }

            Then("pop should equal None") {
                heap.pop() `should equal` None
            }

            Then("peek should equal None") {
                heap.peek() `should equal` None
            }
        }
    }
})