Merge remote-tracking branches 'origin/feature/sorting' and 'origin/feature/even-only-sort-strategy' into feature/ui
This commit is contained in:
@@ -0,0 +1,24 @@
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package ru.project.sorting;
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import ru.project.list.MyList;
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import java.util.Comparator;
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public class BubbleSortStrategy<T> implements SortStrategy<T> {
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@Override
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public void sort(MyList<T> list, Comparator<T> comparator) {
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if (list == null || list.size() <= 1) {
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return;
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}
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int n = list.size();
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for (int i = 0; i < n - 1; i++) {
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for (int j = 0; j < n - i - 1; j++) {
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if (comparator.compare(list.get(j), list.get(j + 1)) > 0) {
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T temp = list.get(j);
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list.set(j, list.get(j + 1));
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list.set(j + 1, temp);
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}
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}
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}
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}
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}
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@@ -0,0 +1,84 @@
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package ru.project.sorting;
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import ru.project.list.MyList;
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import java.util.ArrayList;
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import java.util.Comparator;
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import java.util.List;
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import java.util.function.ToIntFunction;
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public class EvenOnlyMergeSortStrategy<T> implements SortStrategy<T> {
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private final ToIntFunction<T> valueExtractor;
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public EvenOnlyMergeSortStrategy(ToIntFunction<T> valueExtractor) {
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this.valueExtractor = valueExtractor;
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}
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@Override
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public void sort(MyList<T> list, Comparator<T> comparator) {
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if (list == null || list.size() <= 1) {
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return;
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}
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List<Integer> evenIndices = new ArrayList<>();
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List<T> evenElements = new ArrayList<>();
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for (int i = 0; i < list.size(); i++) {
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T element = list.get(i);
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int value = valueExtractor.applyAsInt(element);
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if (value % 2 == 0) {
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evenIndices.add(i);
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evenElements.add(element);
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}
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}
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if (evenElements.size() <= 1) {
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return;
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}
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List<T> sortedEven = mergeSort(evenElements, comparator);
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for (int j = 0; j < evenIndices.size(); j++) {
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list.set(evenIndices.get(j), sortedEven.get(j));
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}
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}
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private List<T> mergeSort(List<T> list, Comparator<T> comparator) {
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if (list.size() <= 1) {
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return list;
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}
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int mid = list.size() / 2;
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List<T> left = mergeSort(list.subList(0, mid), comparator);
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List<T> right = mergeSort(list.subList(mid, list.size()), comparator);
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return merge(left, right, comparator);
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}
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private List<T> merge(List<T> left, List<T> right, Comparator<T> comparator) {
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List<T> result = new ArrayList<>();
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int i = 0, j = 0;
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while (i < left.size() && j < right.size()) {
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if (comparator.compare(left.get(i), right.get(j)) <= 0) {
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result.add(left.get(i));
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i++;
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} else {
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result.add(right.get(j));
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j++;
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}
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}
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while (i < left.size()) {
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result.add(left.get(i));
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i++;
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}
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while (j < right.size()) {
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result.add(right.get(j));
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j++;
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}
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return result;
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}
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}
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@@ -0,0 +1,94 @@
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package ru.project.sorting;
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import ru.project.collection.MyLinkedList;
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import ru.project.collection.MyList;
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import java.util.Comparator;
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import java.util.function.ToIntFunction;
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public class EvenOnlySortStrategy<T> implements SortStrategy<T> {
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private SortStrategy<T> sortStrategy;
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private ToIntFunction<T> valueExtractor;
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public EvenOnlySortStrategy() {
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}
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public EvenOnlySortStrategy(SortStrategy<T> sortStrategy) {
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setSortStrategy(sortStrategy);
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}
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public EvenOnlySortStrategy(
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SortStrategy<T> sortStrategy,
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ToIntFunction<T> valueExtractor
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) {
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setSortStrategy(sortStrategy);
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setValueExtractor(valueExtractor);
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}
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public void setSortStrategy(SortStrategy<T> sortStrategy) {
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if (sortStrategy == null) {
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throw new IllegalArgumentException("Sort strategy must not be null");
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}
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this.sortStrategy = sortStrategy;
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}
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public void setValueExtractor(ToIntFunction<T> valueExtractor) {
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if (valueExtractor == null) {
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throw new IllegalArgumentException("Value extractor must not be null");
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}
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this.valueExtractor = valueExtractor;
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}
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@Override
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public void sort(MyList<T> list, Comparator<T> comparator) {
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if (sortStrategy == null) {
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throw new IllegalStateException("Sort strategy is not set");
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}
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if (valueExtractor == null) {
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throw new IllegalStateException("Value extractor is not set");
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}
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if (list == null || list.size() <= 1) {
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return;
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}
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int evenCount = 0;
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for (int i = 0; i < list.size(); i++) {
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T element = list.get(i);
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if (valueExtractor.applyAsInt(element) % 2 == 0) {
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evenCount++;
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}
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}
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if (evenCount <= 1) {
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return;
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}
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MyList<T> evenElements = new MyLinkedList<>();
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int[] evenIndexes = new int[evenCount];
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int evenIndex = 0;
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for (int i = 0; i < list.size(); i++) {
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T element = list.get(i);
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if (valueExtractor.applyAsInt(element) % 2 == 0) {
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evenElements.add(element);
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evenIndexes[evenIndex] = i;
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evenIndex++;
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}
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}
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sortStrategy.sort(evenElements, comparator);
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for (int i = 0; i < evenIndexes.length; i++) {
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list.set(evenIndexes[i], evenElements.get(i));
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}
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}
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}
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@@ -0,0 +1,67 @@
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package ru.project.sorting;
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import ru.project.collection.MyList;
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import java.util.Comparator;
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public class MergeSortStrategy<T> implements SortStrategy<T> {
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@Override
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public void sort(MyList<T> list, Comparator<T> comparator) {
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if (list == null || list.size() <= 1) {
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return;
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}
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mergeSort(list, 0, list.size() - 1, comparator);
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}
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private void mergeSort(MyList<T> list, int left, int right, Comparator<T> comparator) {
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if (left >= right) {
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return;
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}
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int mid = (left + right) / 2;
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mergeSort(list, left, mid, comparator);
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mergeSort(list, mid + 1, right, comparator);
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merge(list, left, mid, right, comparator);
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}
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private void merge(MyList<T> list, int left, int mid, int right, Comparator<T> comparator) {
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int leftSize = mid - left + 1;
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int rightSize = right - mid;
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@SuppressWarnings("unchecked")
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T[] leftArray = (T[]) new Object[leftSize];
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@SuppressWarnings("unchecked")
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T[] rightArray = (T[]) new Object[rightSize];
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for (int i = 0; i < leftSize; i++) {
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leftArray[i] = list.get(left + i);
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}
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for (int j = 0; j < rightSize; j++) {
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rightArray[j] = list.get(mid + 1 + j);
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}
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int i = 0, j = 0, k = left;
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while (i < leftSize && j < rightSize) {
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if (comparator.compare(leftArray[i], rightArray[j]) <= 0) {
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list.set(k, leftArray[i]);
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i++;
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} else {
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list.set(k, rightArray[j]);
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j++;
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}
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k++;
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}
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while (i < leftSize) {
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list.set(k, leftArray[i]);
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i++;
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k++;
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}
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while (j < rightSize) {
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list.set(k, rightArray[j]);
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j++;
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k++;
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}
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}
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}
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@@ -0,0 +1,9 @@
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package ru.project.sorting;
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import ru.project.collection.MyList;
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import java.util.Comparator;
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public interface SortStrategy<T> {
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void sort(MyList<T> list, Comparator<T> comparator);
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}
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@@ -0,0 +1,12 @@
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package ru.project.sorting;
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import ru.project.student.Student;
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import java.util.Comparator;
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public class StudentAverageGradeComparator implements Comparator<Student> {
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@Override
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public int compare(Student s1, Student s2) {
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return Double.compare(s1.getAverageGrade(), s2.getAverageGrade());
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}
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}
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@@ -0,0 +1,12 @@
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package ru.project.sorting;
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import ru.project.student.Student;
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import java.util.Comparator;
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public class StudentGroupComparator implements Comparator<Student> {
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@Override
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public int compare(Student s1, Student s2) {
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return s1.getGroupNumber().compareTo(s2.getGroupNumber());
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}
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}
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@@ -0,0 +1,12 @@
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package ru.project.sorting;
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import ru.project.student.Student;
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import java.util.Comparator;
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public class StudentRecordBookComparator implements Comparator<Student> {
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@Override
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public int compare(Student s1, Student s2) {
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return Integer.compare(s1.getRecordBookNumber(), s2.getRecordBookNumber());
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}
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}
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@@ -3,21 +3,32 @@ package ru.project.student;
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import java.util.Objects;
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public class Student {
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public static final double MIN_AVERAGE_GRADE = 0.0;
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public static final double MAX_AVERAGE_GRADE = 5.0;
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public static final int MIN_RECORD_BOOK_NUMBER = 1;
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public static final String GROUP_NUMBER_PATTERN = "^[A-Z][0-9]{2}$";
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private final String groupNumber;
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private final double averageGrade;
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private final int recordBookNumber;
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public Student(String groupNumber, double averageGrade, int recordBookNumber) {
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if (groupNumber == null || !groupNumber.matches("^[A-Z][0-9]{2}$")) {
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if (groupNumber == null || !groupNumber.matches(GROUP_NUMBER_PATTERN)) {
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throw new IllegalArgumentException(
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"Group number must match format: one uppercase letter + two digits (e.g. A12)");
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"Group number must match pattern: " + GROUP_NUMBER_PATTERN);
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}
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if (averageGrade < 0.0 || averageGrade > 5.0) {
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throw new IllegalArgumentException("Average grade must be between 0.0 and 5.0");
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if (averageGrade < MIN_AVERAGE_GRADE || averageGrade > MAX_AVERAGE_GRADE) {
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throw new IllegalArgumentException(
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"Average grade must be between " + MIN_AVERAGE_GRADE + " and " + MAX_AVERAGE_GRADE);
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}
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if (recordBookNumber <= 0) {
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throw new IllegalArgumentException("Record book number must be positive");
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}
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if (recordBookNumber < MIN_RECORD_BOOK_NUMBER) {
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throw new IllegalArgumentException(
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"Record book number must be at least " + MIN_RECORD_BOOK_NUMBER);
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}
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this.groupNumber = groupNumber;
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this.averageGrade = averageGrade;
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this.recordBookNumber = recordBookNumber;
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@@ -27,6 +38,10 @@ public class Student {
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return groupNumber;
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}
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public double getAverageGrade() {
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return averageGrade;
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}
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public int getRecordBookNumber() {
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return recordBookNumber;
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}
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@@ -39,11 +54,22 @@ public class Student {
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return new Student(this.groupNumber, averageGrade, this.recordBookNumber);
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}
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public Student withRecordBookNumber(int recordBookNumber) {
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return new Student(this.groupNumber, this.averageGrade, recordBookNumber);
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public static double getMinAverageGrade() {
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return MIN_AVERAGE_GRADE;
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}
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public static double getMaxAverageGrade() {
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return MAX_AVERAGE_GRADE;
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}
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public static int getMinRecordBookNumber() {
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return MIN_RECORD_BOOK_NUMBER;
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}
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public static String getGroupNumberPattern() {
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return GROUP_NUMBER_PATTERN;
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}
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@Override
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public String toString() {
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return "Student{"
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+ "groupNumber='"
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@@ -56,16 +82,19 @@ public class Student {
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+ '}';
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}
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@Override
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public int hashCode() {
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return Objects.hash(groupNumber, averageGrade, recordBookNumber);
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}
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@Override
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public boolean equals(Object obj) {
|
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if (this == obj) {
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return true;
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}
|
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|
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if (obj == null || getClass() != obj.getClass()) {
|
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return false;
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}
|
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|
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if (this.hashCode() != obj.hashCode()) {
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return false;
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}
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@@ -75,25 +104,4 @@ public class Student {
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&& recordBookNumber == student.recordBookNumber
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&& Objects.equals(groupNumber, student.groupNumber);
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}
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|
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@Override
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public int hashCode() {
|
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return Objects.hash(groupNumber, averageGrade, recordBookNumber);
|
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}
|
||||
|
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public static double getMinAverageGrade() {
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return 0.0;
|
||||
}
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|
||||
public static double getMaxAverageGrade() {
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return 5.0;
|
||||
}
|
||||
|
||||
public static int getMinRecordBookNumber() {
|
||||
return 1;
|
||||
}
|
||||
|
||||
public static String getGroupNumberPattern() {
|
||||
return "^[A-Z][0-9]{2}$";
|
||||
}
|
||||
}
|
||||
|
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@@ -0,0 +1,163 @@
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||||
package ru.project.sorting;
|
||||
|
||||
import org.junit.jupiter.api.BeforeEach;
|
||||
import org.junit.jupiter.api.Test;
|
||||
import ru.project.list.MyList;
|
||||
import ru.project.list.MyLinkedList;
|
||||
import ru.project.student.Student;
|
||||
|
||||
import java.util.Comparator;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.*;
|
||||
|
||||
class SortStrategyTest {
|
||||
|
||||
private MyList<Student> students;
|
||||
private final Comparator<Student> groupComparator = new StudentGroupComparator();
|
||||
private final Comparator<Student> gradeComparator = new StudentAverageGradeComparator();
|
||||
private final Comparator<Student> recordComparator = new StudentRecordBookComparator();
|
||||
|
||||
@BeforeEach
|
||||
void setUp() {
|
||||
students = new MyLinkedList<>();
|
||||
students.add(new Student("A12", 4.5, 12345));
|
||||
students.add(new Student("B32", 3.8, 12346));
|
||||
students.add(new Student("Z00", 4.9, 12347));
|
||||
students.add(new Student("A12", 4.2, 12348));
|
||||
students.add(new Student("B32", 5.0, 12349));
|
||||
}
|
||||
|
||||
@Test
|
||||
void testMergeSortByGroupNumber() {
|
||||
SortStrategy<Student> strategy = new MergeSortStrategy<>();
|
||||
strategy.sort(students, groupComparator);
|
||||
assertOrder(students, "A12", "A12", "B32", "B32", "Z00");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testMergeSortByAverageGrade() {
|
||||
SortStrategy<Student> strategy = new MergeSortStrategy<>();
|
||||
strategy.sort(students, gradeComparator);
|
||||
assertOrder(students, 3.8, 4.2, 4.5, 4.9, 5.0);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testMergeSortByRecordBookNumber() {
|
||||
SortStrategy<Student> strategy = new MergeSortStrategy<>();
|
||||
strategy.sort(students, recordComparator);
|
||||
assertOrder(students, 12345, 12346, 12347, 12348, 12349);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testBubbleSortByGroupNumber() {
|
||||
SortStrategy<Student> strategy = new BubbleSortStrategy<>();
|
||||
strategy.sort(students, groupComparator);
|
||||
assertOrder(students, "A12", "A12", "B32", "B32", "Z00");
|
||||
}
|
||||
|
||||
@Test
|
||||
void testBubbleSortByAverageGrade() {
|
||||
SortStrategy<Student> strategy = new BubbleSortStrategy<>();
|
||||
strategy.sort(students, gradeComparator);
|
||||
assertOrder(students, 3.8, 4.2, 4.5, 4.9, 5.0);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testBubbleSortByRecordBookNumber() {
|
||||
SortStrategy<Student> strategy = new BubbleSortStrategy<>();
|
||||
strategy.sort(students, recordComparator);
|
||||
assertOrder(students, 12345, 12346, 12347, 12348, 12349);
|
||||
}
|
||||
|
||||
@Test
|
||||
void testEvenOnlySortByRecordBookNumber() {
|
||||
MyList<Student> list = new MyLinkedList<>();
|
||||
list.add(new Student("A01", 4.5, 7));
|
||||
list.add(new Student("A02", 4.5, 8));
|
||||
list.add(new Student("A03", 4.5, 3));
|
||||
list.add(new Student("A04", 4.5, 2));
|
||||
list.add(new Student("A05", 4.5, 5));
|
||||
list.add(new Student("A06", 4.5, 4));
|
||||
|
||||
EvenOnlyMergeSortStrategy<Student> strategy =
|
||||
new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
|
||||
strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
|
||||
|
||||
int[] expected = {7, 2, 3, 4, 5, 8};
|
||||
for (int i = 0; i < list.size(); i++) {
|
||||
assertEquals(expected[i], list.get(i).getRecordBookNumber());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
void testEvenOnlyWithNoEvenElements() {
|
||||
MyList<Student> list = new MyLinkedList<>();
|
||||
list.add(new Student("A01", 4.5, 1));
|
||||
list.add(new Student("A02", 4.5, 3));
|
||||
list.add(new Student("A03", 4.5, 5));
|
||||
|
||||
EvenOnlyMergeSortStrategy<Student> strategy =
|
||||
new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
|
||||
strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
|
||||
|
||||
int[] expected = {1, 3, 5};
|
||||
for (int i = 0; i < list.size(); i++) {
|
||||
assertEquals(expected[i], list.get(i).getRecordBookNumber());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
void testEvenOnlyWithAllEvenElements() {
|
||||
MyList<Student> list = new MyLinkedList<>();
|
||||
list.add(new Student("A01", 4.5, 4));
|
||||
list.add(new Student("A02", 4.5, 2));
|
||||
list.add(new Student("A03", 4.5, 6));
|
||||
|
||||
EvenOnlyMergeSortStrategy<Student> strategy =
|
||||
new EvenOnlyMergeSortStrategy<>(Student::getRecordBookNumber);
|
||||
strategy.sort(list, Comparator.comparingInt(Student::getRecordBookNumber));
|
||||
|
||||
int[] expected = {2, 4, 6};
|
||||
for (int i = 0; i < list.size(); i++) {
|
||||
assertEquals(expected[i], list.get(i).getRecordBookNumber());
|
||||
}
|
||||
}
|
||||
|
||||
@Test
|
||||
void testSortEmptyList() {
|
||||
MyList<Student> empty = new MyLinkedList<>();
|
||||
SortStrategy<Student> strategy = new MergeSortStrategy<>();
|
||||
strategy.sort(empty, groupComparator);
|
||||
assertEquals(0, empty.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
void testSortSingleElement() {
|
||||
MyList<Student> single = new MyLinkedList<>();
|
||||
single.add(new Student("A12", 4.5, 12345));
|
||||
SortStrategy<Student> strategy = new MergeSortStrategy<>();
|
||||
strategy.sort(single, groupComparator);
|
||||
assertEquals(1, single.size());
|
||||
}
|
||||
|
||||
private void assertOrder(MyList<Student> list, String... groups) {
|
||||
assertEquals(groups.length, list.size());
|
||||
for (int i = 0; i < groups.length; i++) {
|
||||
assertEquals(groups[i], list.get(i).getGroupNumber());
|
||||
}
|
||||
}
|
||||
|
||||
private void assertOrder(MyList<Student> list, double... grades) {
|
||||
assertEquals(grades.length, list.size());
|
||||
for (int i = 0; i < grades.length; i++) {
|
||||
assertEquals(grades[i], list.get(i).getAverageGrade(), 0.001);
|
||||
}
|
||||
}
|
||||
|
||||
private void assertOrder(MyList<Student> list, int... records) {
|
||||
assertEquals(records.length, list.size());
|
||||
for (int i = 0; i < records.length; i++) {
|
||||
assertEquals(records[i], list.get(i).getRecordBookNumber());
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,301 @@
|
||||
package ru.project.sorting;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
import ru.project.collection.MyLinkedList;
|
||||
import ru.project.collection.MyList;
|
||||
import ru.project.student.Student;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertSame;
|
||||
|
||||
import java.util.Comparator;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertThrows;
|
||||
import static org.junit.jupiter.api.Assertions.assertTrue;
|
||||
|
||||
class EvenOnlySortStrategyTest {
|
||||
|
||||
@Test
|
||||
void shouldHandleEmptyList() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>(),
|
||||
value -> value
|
||||
);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(0, list.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldKeepSingleEvenElementUnchanged() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
list.add(4);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>(),
|
||||
value -> value
|
||||
);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(4, list.get(0));
|
||||
assertEquals(1, list.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldKeepSingleOddElementUnchanged() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
list.add(7);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>(),
|
||||
value -> value
|
||||
);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(7, list.get(0));
|
||||
assertEquals(1, list.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldHandleDuplicateEvenValues() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
list.add(8);
|
||||
list.add(4);
|
||||
list.add(8);
|
||||
list.add(2);
|
||||
list.add(4);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>(),
|
||||
value -> value
|
||||
);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(2, list.get(0));
|
||||
assertEquals(4, list.get(1));
|
||||
assertEquals(4, list.get(2));
|
||||
assertEquals(8, list.get(3));
|
||||
assertEquals(8, list.get(4));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldKeepOddStudentObjectsAtSameIndexes() {
|
||||
Student oddFirst = new Student("A01", 4.0, 7);
|
||||
Student evenFirst = new Student("A02", 4.0, 8);
|
||||
Student oddSecond = new Student("A03", 4.0, 3);
|
||||
Student evenSecond = new Student("A04", 4.0, 2);
|
||||
Student oddThird = new Student("A05", 4.0, 5);
|
||||
Student evenThird = new Student("A06", 4.0, 4);
|
||||
|
||||
MyList<Student> students = new MyLinkedList<>();
|
||||
|
||||
students.add(oddFirst);
|
||||
students.add(evenFirst);
|
||||
students.add(oddSecond);
|
||||
students.add(evenSecond);
|
||||
students.add(oddThird);
|
||||
students.add(evenThird);
|
||||
|
||||
EvenOnlySortStrategy<Student> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>(),
|
||||
Student::getRecordBookNumber
|
||||
);
|
||||
|
||||
strategy.sort(students, new StudentRecordBookComparator());
|
||||
|
||||
assertSame(oddFirst, students.get(0));
|
||||
assertSame(oddSecond, students.get(2));
|
||||
assertSame(oddThird, students.get(4));
|
||||
|
||||
assertEquals(2, students.get(1).getRecordBookNumber());
|
||||
assertEquals(4, students.get(3).getRecordBookNumber());
|
||||
assertEquals(8, students.get(5).getRecordBookNumber());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldSortWhenStrategyPassedThroughConstructor() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
list.add(8);
|
||||
list.add(2);
|
||||
list.add(4);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy =
|
||||
new EvenOnlySortStrategy<>(
|
||||
new MergeSortStrategy<>()
|
||||
);
|
||||
|
||||
strategy.setValueExtractor(value -> value);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(2, list.get(0));
|
||||
assertEquals(4, list.get(1));
|
||||
assertEquals(8, list.get(2));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldSortOnlyEvenElements() {
|
||||
MyList<Student> students = new MyLinkedList<>();
|
||||
|
||||
students.add(new Student("A01", 4.0, 7));
|
||||
students.add(new Student("A02", 4.0, 8));
|
||||
students.add(new Student("A03", 4.0, 3));
|
||||
students.add(new Student("A04", 4.0, 2));
|
||||
students.add(new Student("A05", 4.0, 5));
|
||||
students.add(new Student("A06", 4.0, 4));
|
||||
|
||||
EvenOnlySortStrategy<Student> strategy = new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), Student::getRecordBookNumber);
|
||||
|
||||
strategy.sort(students, new StudentRecordBookComparator());
|
||||
|
||||
assertEquals(7, students.get(0).getRecordBookNumber());
|
||||
assertEquals(2, students.get(1).getRecordBookNumber());
|
||||
assertEquals(3, students.get(2).getRecordBookNumber());
|
||||
assertEquals(4, students.get(3).getRecordBookNumber());
|
||||
assertEquals(5, students.get(4).getRecordBookNumber());
|
||||
assertEquals(8, students.get(5).getRecordBookNumber());
|
||||
|
||||
assertEquals(6, students.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldSortAllEvenElements() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
list.add(8);
|
||||
list.add(2);
|
||||
list.add(6);
|
||||
list.add(4);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(2, list.get(0));
|
||||
assertEquals(4, list.get(1));
|
||||
assertEquals(6, list.get(2));
|
||||
assertEquals(8, list.get(3));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldKeepOddElementsUnchanged() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
list.add(7);
|
||||
list.add(3);
|
||||
list.add(5);
|
||||
list.add(1);
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>(new MergeSortStrategy<>(), value -> value);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertEquals(7, list.get(0));
|
||||
assertEquals(3, list.get(1));
|
||||
assertEquals(5, list.get(2));
|
||||
assertEquals(1, list.get(3));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowWhenSortStrategyIsNotSet() {
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>();
|
||||
|
||||
strategy.setValueExtractor(value -> value);
|
||||
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
list.add(2);
|
||||
list.add(4);
|
||||
|
||||
assertThrows(IllegalStateException.class, () -> strategy.sort(list, Integer::compare));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldRejectNullSortStrategy() {
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>();
|
||||
|
||||
assertThrows(IllegalArgumentException.class, () -> strategy.setSortStrategy(null));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldDelegateSortingToProvidedStrategy() {
|
||||
MyList<Integer> list = new MyLinkedList<>();
|
||||
|
||||
list.add(7);
|
||||
list.add(8);
|
||||
list.add(3);
|
||||
list.add(2);
|
||||
|
||||
RecordingSortStrategy recordingStrategy = new RecordingSortStrategy();
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>(recordingStrategy, value -> value);
|
||||
|
||||
strategy.sort(list, Integer::compare);
|
||||
|
||||
assertTrue(recordingStrategy.wasCalled);
|
||||
assertEquals(2, recordingStrategy.receivedSize);
|
||||
assertEquals(8, recordingStrategy.firstReceivedElement);
|
||||
assertEquals(2, recordingStrategy.secondReceivedElement);
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldUseNewStrategyAfterReplacement() {
|
||||
RecordingSortStrategy firstStrategy = new RecordingSortStrategy();
|
||||
|
||||
RecordingSortStrategy secondStrategy = new RecordingSortStrategy();
|
||||
|
||||
EvenOnlySortStrategy<Integer> strategy = new EvenOnlySortStrategy<>(firstStrategy, value -> value);
|
||||
|
||||
MyList<Integer> firstList = new MyLinkedList<>();
|
||||
firstList.add(4);
|
||||
firstList.add(2);
|
||||
|
||||
strategy.sort(firstList, Integer::compare);
|
||||
|
||||
assertTrue(firstStrategy.wasCalled);
|
||||
|
||||
strategy.setSortStrategy(secondStrategy);
|
||||
|
||||
MyList<Integer> secondList = new MyLinkedList<>();
|
||||
secondList.add(8);
|
||||
secondList.add(6);
|
||||
|
||||
strategy.sort(secondList, Integer::compare);
|
||||
|
||||
assertTrue(secondStrategy.wasCalled);
|
||||
}
|
||||
|
||||
private static class RecordingSortStrategy implements SortStrategy<Integer> {
|
||||
|
||||
private boolean wasCalled;
|
||||
private int receivedSize;
|
||||
private Integer firstReceivedElement;
|
||||
private Integer secondReceivedElement;
|
||||
|
||||
@Override
|
||||
public void sort(MyList<Integer> list, Comparator<Integer> comparator) {
|
||||
wasCalled = true;
|
||||
receivedSize = list.size();
|
||||
|
||||
if (list.size() > 0) {
|
||||
firstReceivedElement = list.get(0);
|
||||
}
|
||||
|
||||
if (list.size() > 1) {
|
||||
secondReceivedElement = list.get(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -2,167 +2,144 @@ package ru.project.student;
|
||||
|
||||
import org.junit.jupiter.api.Test;
|
||||
|
||||
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
|
||||
import static org.junit.jupiter.api.Assertions.assertEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertThrows;
|
||||
import static org.junit.jupiter.api.Assertions.assertNotEquals;
|
||||
import static org.junit.jupiter.api.Assertions.assertNotSame;
|
||||
|
||||
|
||||
class StudentTest {
|
||||
@Test
|
||||
void shouldCreateValidStudent() {
|
||||
Student student = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
|
||||
assertEquals("101", student.getGroupNumber());
|
||||
@Test
|
||||
void testValidStudentCreation() {
|
||||
Student student = new Student("A12", 4.5, 12345);
|
||||
assertEquals("A12", student.getGroupNumber());
|
||||
assertEquals(4.5, student.getAverageGrade());
|
||||
assertEquals("12345", student.getRecordBookNumber());
|
||||
assertEquals(12345, student.getRecordBookNumber());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenGroupNumberIsEmpty() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
});
|
||||
void testValidGroupNumbers() {
|
||||
assertDoesNotThrow(() -> new Student("A12", 4.5, 1));
|
||||
assertDoesNotThrow(() -> new Student("B32", 4.5, 1));
|
||||
assertDoesNotThrow(() -> new Student("Z00", 4.5, 1));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenAverageGradeIsGreaterThanFive() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(6.0)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
});
|
||||
void testInvalidGroupNumbers() {
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("a12", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A1", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A123", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("AA1", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("а1А", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("аа!!а123", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("23фи!12", 4.5, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("№№###*()", 4.5, 1));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenAverageGradeIsLessThanZero() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(-1.0)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
});
|
||||
void testValidAverageGrades() {
|
||||
assertDoesNotThrow(() -> new Student("A12", 0.0, 1));
|
||||
assertDoesNotThrow(() -> new Student("A12", 5.0, 1));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldCreateStudentWhenAverageGradeIsZero() {
|
||||
Student student = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(0.0)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
|
||||
assertEquals(0.0, student.getAverageGrade());
|
||||
void testInvalidAverageGrades() {
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A12", -1.0, 1));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A12", 6.0, 1));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldCreateStudentWhenAverageGradeIsFive() {
|
||||
Student student = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(5.0)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
|
||||
assertEquals(5.0, student.getAverageGrade());
|
||||
void testValidRecordBookNumbers() {
|
||||
assertDoesNotThrow(() -> new Student("A12", 4.5, 1));
|
||||
assertDoesNotThrow(() -> new Student("A12", 4.5, 12345));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenRecordBookNumberIsEmpty() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("")
|
||||
.build();
|
||||
});
|
||||
void testInvalidRecordBookNumbers() {
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A12", 4.5, 0));
|
||||
assertThrows(IllegalArgumentException.class, () -> new Student("A12", 4.5, -1));
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenGroupNumberIsNull() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber(null)
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
});
|
||||
void testWithGroupNumber() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
Student updated = original.withGroupNumber("B32");
|
||||
|
||||
assertNotSame(original, updated);
|
||||
assertEquals("B32", updated.getGroupNumber());
|
||||
assertEquals(4.5, updated.getAverageGrade());
|
||||
assertEquals(12345, updated.getRecordBookNumber());
|
||||
|
||||
assertEquals("A12", original.getGroupNumber());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenGroupNumberIsBlank() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber(" ")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
});
|
||||
void testWithAverageGrade() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
Student updated = original.withAverageGrade(4.8);
|
||||
|
||||
assertNotSame(original, updated);
|
||||
assertEquals(4.8, updated.getAverageGrade());
|
||||
assertEquals("A12", updated.getGroupNumber());
|
||||
assertEquals(12345, updated.getRecordBookNumber());
|
||||
|
||||
assertEquals(4.5, original.getAverageGrade());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenRecordBookNumberIsNull() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber(null)
|
||||
.build();
|
||||
});
|
||||
void testWithRecordBookNumber() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
Student updated = original.withRecordBookNumber(99999);
|
||||
|
||||
assertNotSame(original, updated);
|
||||
assertEquals(99999, updated.getRecordBookNumber());
|
||||
assertEquals("A12", updated.getGroupNumber());
|
||||
assertEquals(4.5, updated.getAverageGrade());
|
||||
|
||||
assertEquals(12345, original.getRecordBookNumber());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldThrowExceptionWhenRecordBookNumberIsBlank() {
|
||||
assertThrows(IllegalArgumentException.class, () -> {
|
||||
new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber(" ")
|
||||
.build();
|
||||
});
|
||||
void testWithInvalidGroupNumber() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> original.withGroupNumber("a12"));
|
||||
assertEquals("A12", original.getGroupNumber()); // не изменился
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldReturnTrueWhenStudentsAreEqual() {
|
||||
Student student1 = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
|
||||
Student student2 = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
|
||||
assertEquals(student1, student2);
|
||||
assertEquals(student1.hashCode(), student2.hashCode());
|
||||
void testWithInvalidAverageGrade() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> original.withAverageGrade(6.0));
|
||||
assertEquals(4.5, original.getAverageGrade());
|
||||
}
|
||||
|
||||
@Test
|
||||
void shouldReturnFalseWhenStudentsAreDifferent() {
|
||||
Student student1 = new StudentBuilder()
|
||||
.setGroupNumber("101")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
void testWithInvalidRecordBookNumber() {
|
||||
Student original = new Student("A12", 4.5, 12345);
|
||||
assertThrows(IllegalArgumentException.class,
|
||||
() -> original.withRecordBookNumber(0));
|
||||
assertEquals(12345, original.getRecordBookNumber());
|
||||
}
|
||||
|
||||
Student student2 = new StudentBuilder()
|
||||
.setGroupNumber("102")
|
||||
.setAverageGrade(4.5)
|
||||
.setRecordBookNumber("12345")
|
||||
.build();
|
||||
@Test
|
||||
void testEqualsAndHashCode() {
|
||||
Student s1 = new Student("A12", 4.5, 12345);
|
||||
Student s2 = new Student("A12", 4.5, 12345);
|
||||
Student s3 = new Student("B32", 4.5, 12345);
|
||||
Student s4 = new Student("A12", 4.8, 12345);
|
||||
Student s5 = new Student("A12", 4.5, 99999);
|
||||
|
||||
assertNotEquals(student1, student2);
|
||||
assertEquals(s1, s2);
|
||||
assertEquals(s1.hashCode(), s2.hashCode());
|
||||
|
||||
assertNotEquals(s1, s3);
|
||||
assertNotEquals(s1, s4);
|
||||
assertNotEquals(s1, s5);
|
||||
assertNotEquals(s1, null);
|
||||
assertNotEquals(s1, "some string");
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user