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unit test for empty and full buffer

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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
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5
data-structures/src/main/java/com/baeldung/circularbuffer/CircularBuffer.java
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@ -18,11 +18,6 @@ public class CircularBuffer<E> {
this.writeSequence = -1; this.writeSequence = -1;
} }
/**
* Adds a new element to the buffer, if the buffer is not full
* @param element
* @return
*/
public boolean offer(E element) { public boolean offer(E element) {
if (!isFull()) { if (!isFull()) {

25
data-structures/src/test/java/com/baeldung/circularbuffer/CircularBufferUnitTest.java
View File

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