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/**
* Copyright (C) 2019 Adrien Hopkins
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package org.unitConverter.math;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.NoSuchElementException;
import org.junit.jupiter.api.Test;
import org.unitConverter.math.ConditionalExistenceCollections.ConditionalExistenceIterator;
/**
* Tests the {@link #ConditionalExistenceCollections}.
*
* @author Adrien Hopkins
* @since 2019-10-16
*/
class ConditionalExistenceCollectionsTest {
/**
* The returned iterator ignores elements that don't start with "a".
*
* @return test iterator
* @since 2019-10-17
*/
ConditionalExistenceIterator<String> getTestIterator() {
final List<String> items = Arrays.asList("aa", "ab", "ba");
final Iterator<String> it = items.iterator();
final ConditionalExistenceIterator<String> cit = (ConditionalExistenceIterator<String>) ConditionalExistenceCollections
.conditionalExistenceIterator(it, s -> s.startsWith("a"));
return cit;
}
/**
* The returned map ignores mappings where the value is zero.
*
* @return map to be used for test data
* @since 2019-10-16
*/
Map<String, Integer> getTestMap() {
final Map<String, Integer> map = new HashMap<>();
map.put("one", 1);
map.put("two", 2);
map.put("zero", 0);
map.put("ten", 10);
final Map<String, Integer> conditionalMap = ConditionalExistenceCollections.conditionalExistenceMap(map,
e -> !Integer.valueOf(0).equals(e.getValue()));
return conditionalMap;
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#containsKey(java.lang.Object)}.
*/
@Test
void testContainsKeyObject() {
final Map<String, Integer> map = this.getTestMap();
assertTrue(map.containsKey("one"));
assertTrue(map.containsKey("ten"));
assertFalse(map.containsKey("five"));
assertFalse(map.containsKey("zero"));
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#containsValue(java.lang.Object)}.
*/
@Test
void testContainsValueObject() {
final Map<String, Integer> map = this.getTestMap();
assertTrue(map.containsValue(1));
assertTrue(map.containsValue(10));
assertFalse(map.containsValue(5));
assertFalse(map.containsValue(0));
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#entrySet()}.
*/
@Test
void testEntrySet() {
final Map<String, Integer> map = this.getTestMap();
for (final Entry<String, Integer> e : map.entrySet()) {
assertTrue(e.getValue() != 0);
}
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#get(java.lang.Object)}.
*/
@Test
void testGetObject() {
final Map<String, Integer> map = this.getTestMap();
assertEquals(1, map.get("one"));
assertEquals(10, map.get("ten"));
assertEquals(null, map.get("five"));
assertEquals(null, map.get("zero"));
}
@Test
void testIterator() {
final ConditionalExistenceIterator<String> testIterator = this.getTestIterator();
assertTrue(testIterator.hasNext);
assertTrue(testIterator.hasNext());
assertEquals("aa", testIterator.nextElement);
assertEquals("aa", testIterator.next());
assertTrue(testIterator.hasNext);
assertTrue(testIterator.hasNext());
assertEquals("ab", testIterator.nextElement);
assertEquals("ab", testIterator.next());
assertFalse(testIterator.hasNext);
assertFalse(testIterator.hasNext());
assertEquals(null, testIterator.nextElement);
assertThrows(NoSuchElementException.class, testIterator::next);
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#keySet()}.
*/
@Test
void testKeySet() {
final Map<String, Integer> map = this.getTestMap();
assertFalse(map.keySet().contains("zero"));
}
/**
* Test method for {@link org.unitConverter.math.ZeroIsNullMap#values()}.
*/
@Test
void testValues() {
final Map<String, Integer> map = this.getTestMap();
assertFalse(map.values().contains(0));
}
}
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