Sorting Test + Impl

code/sorting/src/main/java/fr/istic/vv/Sorting.java

@@ -1,12 +1,129 @@
 package fr.istic.vv;
+import java.util.ArrayList;
 import java.util.Comparator;
+import java.util.List;
 
 public class Sorting {
 
-    public static <T>  T[] bubblesort(T[] array, Comparator<T> comparator) { return null; }
+    public static <T> void swap(T[] array, int i, int j){
+        T temp = array[i];
+        array[i] = array[j];
+        array[j] = temp;
+    }
+
+    // BUBBLESORT ///////////////////////////////////////////////////////////////////////
+
+    public static <T>  T[] bubblesort(T[] array, Comparator<T> comparator) {
+        int n = array.length;
+        T[] sortedArray=array.clone();
+        boolean swapped = true;
+        while(swapped){
+            swapped = false;
+            for(int i = 0; i<n-1; i++){
+                if(comparator.compare(sortedArray[i], sortedArray[i+1])>0){
+                    swap(sortedArray, i, i+1);
+                    swapped = true;
+                }
+            }
+            n=n-1;
+        }
+        for(int i = 0; i<sortedArray.length; i++){
+            //System.out.print( sortedArray[i] + " ");
+        }
+         //System.out.println("");
+        return sortedArray;
+    }
+
+    // QUICKSORT ///////////////////////////////////////////////////////////////////////
+
+    public static <T> T[] quicksort(T[] array, Comparator<T> comparator)  {
+        T[] sortedArray=array.clone();
+
+        quicksortBis(sortedArray, comparator, 0, sortedArray.length-1);
+
+        return sortedArray;
+    }
+
+    private static <T> void quicksortBis(T[] array, Comparator<T> comparator, int first, int last){
+        if(first<last){
+            int pivot = (last-first)/2;
+            pivot = partition(array,comparator,first,last,pivot);
+            quicksortBis(array, comparator,first, pivot-1);
+            quicksortBis(array, comparator,pivot+1, last);
+        }
+    }
+
+    private static <T> int partition(T[] array, Comparator<T> comparator, int first, int last,int pivot){
+        swap(array, first, last);
+        int j = first;
+        for(int i = first; i<last; i++){
+            if(comparator.compare(array[i], array[last])<=0){
+                swap(array, i, j);
+                j++;
+            }
+        }
+        swap(array, last, j);
+        return j;
+    }
+
+    // MERGESORT ///////////////////////////////////////////////////////////////////////
+
+    public static <T> T[] mergesort(T[] array, Comparator<T> comparator) {
+        List<T> list = new ArrayList<T>();
+
+        for(int i = 0; i<array.length; i++){
+            list.add(array[i]);
+        }
+
+        list = mergesortBis(list,comparator);
+        
+        T[] sortedArray=array.clone();
+        for(int i = 0; i<array.length; i++){
+           sortedArray[i] = list.get(i);
+        }
+
+        return sortedArray;
+    }
+
+    public static <T> List<T> mergesortBis(List<T> list, Comparator<T> comparator) {
+        List<T> res = list;
+
+        if(list.size()>1){
+            List<T> list1 = new ArrayList<T>(list.subList(0,list.size()/2));
+            List<T> list2 = new ArrayList<T>(list.subList(list.size()/2,list.size()));
+            
+            res = merge(mergesortBis(list1,comparator),mergesortBis(list2,comparator),comparator);
+        }
+
+        return res;
+    }
+
+    public static <T> List<T> merge(List<T> list1, List<T> list2, Comparator<T> comparator){
+        List<T> res = new ArrayList<T>();
+        int i = 0;
+        int j = 0;
+        while(i<list1.size() || j<list2.size()){
+            if(j>=list2.size()) {
+                res.add(list1.get(i));
+                i++;
+            }
+            else if(i>=list1.size()) {
+                res.add(list2.get(j));
+                j++;
+            }
+            else if(comparator.compare(list1.get(i),list2.get(j))<=0){
+                res.add(list1.get(i));
+                i++;
+            }
+            else{
+                res.add(list2.get(j));
+                j++;
+            }
+        }
+        return res;
+    }
+
 
-    public static <T> T[] quicksort(T[] array, Comparator<T> comparator)  { return null; }
 
-    public static <T> T[] mergesort(T[] array, Comparator<T> comparator) { return null; }
 
 }

code/sorting/src/test/java/fr/istic/vv/SortingTest.java

@@ -1,9 +1,154 @@
 package fr.istic.vv;
 import net.jqwik.api.*;
+import static fr.istic.vv.Sorting.*;
+
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Map;
 
 public class SortingTest {
-    @Property
-    boolean absoluteValueOfAllNumbersIsPositive(@ForAll int anInteger) {
-        return Math.abs(anInteger) >= 0;
+
+    public static <T> boolean isSorted(T[] array, Comparator<T> comparator){
+        boolean isSorted = true;
+        for(int i = 0; i<array.length-1 && isSorted; i++){
+            isSorted = isSorted && comparator.compare(array[i],array[i+1])<=0;
+        }
+        return isSorted;
     }
+
+    public static <T> Map<T,Integer> countNbElement(T[] array){
+        Map<T,Integer> map = new HashMap<T,Integer>();
+            for(int i = 0; i<array.length; i++){
+                if(map.containsKey(array[i])){
+                    int newVal = map.get(array[i])+1;
+                    map.put(array[i],newVal);
+                }
+                else{
+                    map.put(array[i],1);
+                }
+            }
+        return map;
+    }
+
+    public static <T> boolean haveSameElements(T[] array1,T[] array2){
+        boolean isSorted = array1.length==array2.length;
+        if(isSorted){
+            Map<T,Integer> elements1 = countNbElement(array1);
+            Map<T,Integer> elements2 = countNbElement(array2);
+            for (T key : elements1.keySet()) {
+                isSorted = isSorted && elements2.containsKey(key) && elements1.get(key) == elements2.get(key);
+                if(!isSorted)  break;
+            }
+        }
+        return isSorted;
+    }
+
+    public static <T> void displayerCompare(T[] array1, T[] array2){
+        for(int i = 0; i<array1.length; i++){
+            System.out.print(array1[i] + " ");
+        }
+        System.out.println("");
+        for(int i = 0; i<array2.length; i++){
+            System.out.print(array2[i] + " ");
+        }
+        System.out.println("\n");
+    }
+
+
+    static Comparator<Integer> comparatorInt = (a, b) -> a-b; //-1 0 1 2 3
+    static Comparator<String> comparatorStr = (a, b) -> a.compareTo(b); //a ab ac b c d
+
+
+
+    // BUBBLESORT ///////////////////////////////////////////////////////////////////////
+
+    @Property
+    void arrayIsSortedBubble(@ForAll Integer[] array) {
+        Integer[] sortedArray = bubblesort(array, comparatorInt);
+
+        boolean res = isSorted(sortedArray,comparatorInt);
+
+        if(!res){
+            System.out.println("\nisSorted Bubble Fail :\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+
+    @Property
+    void sameElementsBubble(@ForAll Integer[] array) {
+        Integer[] sortedArray = bubblesort(array, comparatorInt);
+
+        boolean res = haveSameElements(array,sortedArray);
+
+        if(!res){
+            System.out.println("\nisSame Bubble Fail:\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+
+
+    // QUICKSORT ///////////////////////////////////////////////////////////////////////
+
+    @Property
+    void arrayIsSortedQuick(@ForAll Integer[] array) {
+        Integer[] sortedArray = quicksort(array, comparatorInt);
+
+        boolean res = isSorted(sortedArray,comparatorInt);
+
+        if(!res){
+            System.out.println("\nisSorted Quick Fail :\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+
+    @Property
+    void sameElementsQuick(@ForAll Integer[] array) {
+        Integer[] sortedArray = quicksort(array, comparatorInt);
+
+        boolean res = haveSameElements(array,sortedArray);
+
+        if(!res){
+            System.out.println("\nisSame Quick Fail:\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+
+    // MERGESORT ///////////////////////////////////////////////////////////////////////
+
+    @Property
+    void arrayIsSortedMerge(@ForAll Integer[] array) {
+        Integer[] sortedArray = mergesort(array, comparatorInt);
+
+        boolean res = isSorted(sortedArray,comparatorInt);
+
+        if(!res){
+            System.out.println("\nisSorted Merge Fail :\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+
+    @Property
+    void sameElementsMerge(@ForAll Integer[] array) {
+        Integer[] sortedArray = mergesort(array, comparatorInt);
+
+        boolean res = haveSameElements(array,sortedArray);
+
+        if(!res){
+            System.out.println("\nisSame Merge Fail:\n");
+            displayerCompare(array,sortedArray);
+        }
+
+        assert res;
+    }
+    
 }