Example usage for java.util ArrayDeque isEmpty

Introduction

In this page you can find the example usage for java.util ArrayDeque isEmpty.

Prototype

public boolean isEmpty() 

Source Link

Document

Returns true if this deque contains no elements.

Usage

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveElement() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    assertFalse(deque.remove(o1));/*from  ww w .  ja  v  a  2s  .c  o  m*/

    deque.add(o1);
    assertTrue(deque.remove(o1));
    assertTrue(deque.isEmpty());

    deque.add(o1);
    deque.add(o2);
    assertTrue(deque.remove(o1));
    checkDequeSizeAndContent(deque, o2);
    assertTrue(deque.remove(o2));
    assertTrue(deque.isEmpty());

    assertFalse(deque.remove(null));
}

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From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveLastOccurrence() {
    Object o1 = new Object();
    Object o2 = new Object();
    Object o3 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    assertFalse(deque.removeLastOccurrence(o1));

    deque.add(o1);/*w ww .  jav a2  s . c  om*/
    assertTrue(deque.removeLastOccurrence(o1));
    assertTrue(deque.isEmpty());

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeLastOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3);

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeLastOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o2, o3, o1, o3);
    assertTrue(deque.removeLastOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3, o1, o3);
    assertTrue(deque.removeLastOccurrence(o3));
    checkDequeSizeAndContent(deque, o1, o3, o1);
    assertTrue(deque.removeLastOccurrence(o3));
    checkDequeSizeAndContent(deque, o1, o1);
    assertFalse(deque.removeLastOccurrence(o3));

    assertFalse(deque.removeLastOccurrence(null));
}

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From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveFirstOccurrence() {
    Object o1 = new Object();
    Object o2 = new Object();
    Object o3 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    assertFalse(deque.removeFirstOccurrence(o1));

    deque.add(o1);/*  w  ww .ja  va  2s  .  com*/
    assertTrue(deque.removeFirstOccurrence(o1));
    assertTrue(deque.isEmpty());

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3);

    deque = new ArrayDeque<>();
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    deque.add(o1);
    deque.add(o2);
    deque.add(o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3, o1, o2, o3);
    assertTrue(deque.removeFirstOccurrence(o2));
    checkDequeSizeAndContent(deque, o1, o3, o1, o3);
    assertTrue(deque.removeFirstOccurrence(o1));
    checkDequeSizeAndContent(deque, o3, o1, o3);
    assertTrue(deque.removeFirstOccurrence(o1));
    checkDequeSizeAndContent(deque, o3, o3);
    assertFalse(deque.removeFirstOccurrence(o1));

    assertFalse(deque.removeFirstOccurrence(null));
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testPop() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {/*from w w  w . jav a  2 s  .c o m*/
        deque.pop();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.pop());
    assertTrue(deque.isEmpty());

    deque.add(o1);
    deque.add(o2);
    assertEquals(o1, deque.pop());
    checkDequeSizeAndContent(deque, o2);
    assertEquals(o2, deque.pop());
    assertTrue(deque.isEmpty());
    try {
        deque.pop();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemove() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {/*from   w  w w.j ava2 s. c o m*/
        deque.remove();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.remove());
    assertTrue(deque.isEmpty());

    deque.add(o1);
    deque.add(o2);
    assertEquals(o1, deque.remove());
    checkDequeSizeAndContent(deque, o2);
    assertEquals(o2, deque.removeFirst());
    assertTrue(deque.isEmpty());

    try {
        deque.remove();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveLast() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {/*from  w  ww  .  java 2  s  .  c  o m*/
        deque.removeLast();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.removeLast());
    assertTrue(deque.isEmpty());

    deque.add(o1);
    deque.add(o2);
    assertEquals(o2, deque.removeLast());
    checkDequeSizeAndContent(deque, o1);
    assertEquals(o1, deque.removeLast());
    assertEquals(0, deque.size());

    try {
        deque.removeLast();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRemoveFirst() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {/*from  ww  w  .j a v  a  2 s  . c  o m*/
        deque.removeFirst();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.removeFirst());
    assertTrue(deque.isEmpty());

    deque.add(o1);
    deque.add(o2);
    assertEquals(o1, deque.removeFirst());
    checkDequeSizeAndContent(deque, o2);
    assertEquals(o2, deque.removeFirst());
    assertTrue(deque.isEmpty());

    try {
        deque.removeFirst();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

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From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testRolloverInvariants() {
    ArrayDeque<Integer> deque = new ArrayDeque<>();

    assertTrue(deque.add(1));/*from   w ww  . ja v  a  2s. c  o m*/
    assertEquals(1, (int) deque.removeFirst());
    for (int i = 0; i < 100; i++) {
        assertTrue(deque.add(i));
    }
    assertNotNull(deque.peek());
    assertFalse(deque.isEmpty());

    Iterator<Integer> it = deque.iterator();
    for (int i = 0; i < 100; i++) {
        assertTrue(it.hasNext());
        assertEquals(i, (int) it.next());
        it.remove();
    }
    assertFalse(it.hasNext());
    assertNull(deque.peek());
    assertTrue(deque.isEmpty());
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testElement() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {// w w w . j a  v  a2 s  . c  om
        deque.element();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.element());
    checkDequeSizeAndContent(deque, o1);

    deque.add(o2);
    assertEquals(o1, deque.element());
    checkDequeSizeAndContent(deque, o1, o2);

    deque.clear();
    assertTrue(deque.isEmpty());
    try {
        deque.element();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

---

From source file:com.google.gwt.emultest.java.util.ArrayDequeTest.java

public void testGetLast() {
    Object o1 = new Object();
    Object o2 = new Object();

    ArrayDeque<Object> deque = new ArrayDeque<>();
    try {/* w  w w  . j a v a  2  s .c  o m*/
        deque.getLast();
        fail();
    } catch (NoSuchElementException expected) {
    }

    deque.add(o1);
    assertEquals(o1, deque.getLast());
    checkDequeSizeAndContent(deque, o1);

    deque.add(o2);
    assertEquals(o2, deque.getLast());
    checkDequeSizeAndContent(deque, o1, o2);

    deque.clear();
    assertTrue(deque.isEmpty());
    try {
        deque.getLast();
        fail();
    } catch (NoSuchElementException expected) {
    }
}

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