package com.thealgorithms.others;


import org.junit.jupiter.api.Test;

import java.util.ArrayList;
import java.util.Arrays;

import static org.junit.jupiter.api.Assertions.*;

/**
 * author Alexandros Lemonaris
 */
class BestFitCPUTest {
    int [] sizeOfBlocks;
    int [] sizeOfProcesses;
    ArrayList<Integer> memAllocation = new ArrayList<>();
    ArrayList<Integer> testMemAllocation ;
     MemoryManagementAlgorithms bestFit = new BestFitCPU();

    @Test
    void testFitForUseOfOneBlock() {
        //test1 - 2 processes shall fit to one block instead of using a different block each
        sizeOfBlocks = new int[]{5, 12, 17, 10};
        sizeOfProcesses = new int[]{10, 5, 15, 2};
        memAllocation = bestFit.fitProcess(sizeOfBlocks, sizeOfProcesses);
        testMemAllocation = new ArrayList<>(
                Arrays.asList(3, 0, 2, 2)
        );
        assertEquals(testMemAllocation, memAllocation);
    }
    @Test
    void testFitForEqualProcecesses() {
        //test2
        sizeOfBlocks = new int[]{5, 12, 17, 10};
        sizeOfProcesses = new int[]{10, 10, 10, 10};
        memAllocation = bestFit.fitProcess(sizeOfBlocks, sizeOfProcesses);
        testMemAllocation = new ArrayList<>(
                Arrays.asList(3, 1, 2, -255)
        );
        assertEquals(testMemAllocation, memAllocation);
    }
    @Test
    void testFitForNoEmptyBlockCell() {
        //test3 for more processes than blocks - no empty space left to none of the blocks
        sizeOfBlocks = new int[]{5, 12, 17};
        sizeOfProcesses = new int[]{5, 12, 10, 7};
        memAllocation = bestFit.fitProcess(sizeOfBlocks, sizeOfProcesses);
        testMemAllocation = new ArrayList<>(
                Arrays.asList(0, 1, 2, 2)
        );
        assertEquals(testMemAllocation, memAllocation);
    }
    @Test
    void testFitForSameInputDifferentQuery() {
        //test4 for more processes than blocks - one element does not fit due to input series
        sizeOfBlocks = new int[]{5, 12, 17};
        sizeOfProcesses = new int[]{5, 7, 10, 12};
        memAllocation = bestFit.fitProcess(sizeOfBlocks, sizeOfProcesses);
        testMemAllocation = new ArrayList<>(
                Arrays.asList(0, 1, 2, -255)
        );
        assertEquals(testMemAllocation, memAllocation);
    }
    @Test
    void testFitForMoreBlocksNoFit() {
        //test5 for more blocks than processes
        sizeOfBlocks = new int[] {5, 4, -1, 3, 6};
        sizeOfProcesses = new int [] {10, 11};
        memAllocation = bestFit.fitProcess(sizeOfBlocks, sizeOfProcesses);
        testMemAllocation = new ArrayList<>(
                Arrays.asList( -255, -255)
        );
        assertEquals(testMemAllocation, memAllocation);
    }
}