unit test for empty and full buffer

This commit is contained in:
priyank-sriv 2020-06-15 19:27:30 +05:30
parent 02e7129ff5
commit 7479e7b5a0
2 changed files with 20 additions and 12 deletions

View File

@ -18,11 +18,6 @@ public class CircularBuffer<E> {
this.writeSequence = -1;
}
/**
* Adds a new element to the buffer, if the buffer is not full
* @param element
* @return
*/
public boolean offer(E element) {
if (!isFull()) {

View File

@ -1,5 +1,8 @@
package com.baeldung.circularbuffer;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
@ -9,7 +12,7 @@ public class CircularBufferUnitTest {
private final String[] shapes = { "Circle", "Triangle", "Rectangle", "Square", "Rhombus", "Trapezoid", "Pentagon", "Pentagram", "Hexagon", "Hexagram" };
@Test
public void givenCircularBuffer_WhenAnElementIsAddedAndRemoved_thenBufferIsEmpty() {
public void givenCircularBuffer_whenAnElementIsAddedAndRemoved_thenBufferIsEmpty() {
int capacity = 2;
CircularBuffer<String> buffer = new CircularBuffer<>(capacity);
@ -18,26 +21,36 @@ public class CircularBufferUnitTest {
buffer.offer("Rectangle");
assertEquals(false, buffer.isEmpty());
assertFalse(buffer.isEmpty());
assertEquals(1, buffer.size());
buffer.poll();
assertEquals(true, buffer.isEmpty());
assertTrue(buffer.isEmpty());
}
@Test
public void givenCircularBuffer_WhenElementsAreAddedToCapacity_thenBufferIsFull() {
public void givenCircularBuffer_whenFilledToCapacity_thenNoMoreElementsCanBeAdded() {
int capacity = shapes.length;
CircularBuffer<String> buffer = new CircularBuffer<>(capacity);
assertEquals(true, buffer.isEmpty());
assertTrue(buffer.isEmpty());
for (String shape : shapes) {
buffer.offer(shape);
}
assertEquals(true, buffer.isFull());
assertTrue(buffer.isFull());
assertFalse(buffer.offer("Octagon"));
}
@Test
public void givenCircularBuffer_whenBufferIsEmpty_thenReturnsNull() {
CircularBuffer<String> buffer = new CircularBuffer<>(1);
assertTrue(buffer.isEmpty());
assertNull(buffer.poll());
}
}