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/* ====================================================================
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.util.tests;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.apache.poi.ooxml.util.IdentifierManager;
import org.junit.jupiter.api.Test;
class TestIdentifierManager {
@Test
void testBasic() {
IdentifierManager manager = new IdentifierManager(0L,100L);
assertEquals(101L,manager.getRemainingIdentifiers());
assertEquals(0L,manager.reserveNew());
assertEquals(100L,manager.getRemainingIdentifiers());
assertEquals(1L,manager.reserve(0L));
assertEquals(99L,manager.getRemainingIdentifiers());
}
@Test
void testLongLimits() {
long min = IdentifierManager.MIN_ID;
long max = IdentifierManager.MAX_ID;
IdentifierManager manager = new IdentifierManager(min,max);
//noinspection ConstantValue
assertTrue(max - min + 1 > 0, "Limits lead to a long variable overflow");
assertTrue(manager.getRemainingIdentifiers() > 0, "Limits lead to a long variable overflow");
assertEquals(min,manager.reserveNew());
assertEquals(max,manager.reserve(max));
assertEquals(max - min -1, manager.getRemainingIdentifiers());
manager.release(max);
manager.release(min);
}
@Test
void testReserve() {
IdentifierManager manager1 = new IdentifierManager(10L, 30L);
assertEquals(12L, manager1.reserve(12L));
long reserve = manager1.reserve(12L);
assertNotEquals(12L, reserve, "Same id must be reserved twice!");
assertTrue(manager1.release(12L));
assertTrue(manager1.release(reserve));
assertFalse(manager1.release(12L));
assertFalse(manager1.release(reserve));
IdentifierManager manager2 = new IdentifierManager(0L, 2L);
assertEquals(0L, manager2.reserve(0L));
assertEquals(1L, manager2.reserve(1L));
assertEquals(2L, manager2.reserve(2L));
assertThrows(IllegalStateException.class, () -> manager2.reserve(0L));
assertThrows(IllegalStateException.class, () -> manager2.reserve(1L));
assertThrows(IllegalStateException.class, () -> manager2.reserve(2L));
}
@Test
void testReserveNew() {
IdentifierManager manager = new IdentifierManager(10L,12L);
assertEquals(10L,manager.reserveNew());
assertEquals(11L,manager.reserveNew());
assertEquals(12L,manager.reserveNew());
assertThrows(IllegalStateException.class, manager::reserveNew);
}
@Test
void testRelease() {
IdentifierManager manager = new IdentifierManager(10L,20L);
assertEquals(10L,manager.reserve(10L));
assertEquals(11L,manager.reserve(11L));
assertEquals(12L,manager.reserve(12L));
assertEquals(13L,manager.reserve(13L));
assertEquals(14L,manager.reserve(14L));
assertTrue(manager.release(10L));
assertEquals(10L,manager.reserve(10L));
assertTrue(manager.release(10L));
assertTrue(manager.release(11L));
assertEquals(11L,manager.reserve(11L));
assertTrue(manager.release(11L));
assertFalse(manager.release(11L));
assertFalse(manager.release(10L));
assertEquals(10L,manager.reserve(10L));
assertEquals(11L,manager.reserve(11L));
assertTrue(manager.release(12L));
}
@Test
void testBounds() {
assertThrows(IllegalArgumentException.class,
() -> new IdentifierManager(1, 0),
"Lower bound higher than upper");
assertThrows(IllegalArgumentException.class,
() -> new IdentifierManager(-1, 0),
"Out of lower bound");
assertThrows(IllegalArgumentException.class,
() -> new IdentifierManager(0, Long.MAX_VALUE),
"Out of upper bound");
IdentifierManager manager = new IdentifierManager(10, 100);
assertThrows(IllegalArgumentException.class,
() -> manager.reserve(9),
"Reserve out of lower bound");
assertThrows(IllegalArgumentException.class,
() -> manager.reserve(101),
"Reserve out of upper bound");
// normal reserving works
assertEquals(10, manager.reserve(10));
assertEquals(100, manager.reserve(100));
assertEquals(11, manager.reserve(10));
assertEquals(12, manager.reserve(100));
for (int i = 13; i < 100; i++) {
assertEquals(i, manager.reserve(10));
assertEquals(100 - i - 1,
manager.getRemainingIdentifiers());
}
// now the manager is exhausted
assertThrows(IllegalStateException.class,
() -> manager.reserve(10),
"No more ids left any more");
assertThrows(IllegalArgumentException.class,
() -> manager.release(9),
"Release out of lower bound");
assertThrows(IllegalArgumentException.class,
() -> manager.release(101),
"Release out of upper bound");
for (int i = 10; i < 100; i++) {
assertTrue(manager.release(i));
assertEquals(i - 10 + 1,
manager.getRemainingIdentifiers());
}
assertEquals(100 - 10, manager.getRemainingIdentifiers());
}
}
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