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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.collections;
import org.junit.Test;
import java.util.HashMap;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.fail;
/**
* @author <a href="mailto:einarmr@yahoo-inc.com">Einar M R Rosenvinge</a>
*/
public class ListMapTestCase {
@Test
public void testSimple() {
ListMap<String, String> stringMap = new ListMap<>();
stringMap.put("foo", "bar");
stringMap.put("foo", "far");
stringMap.put("bar", "rab");
List<String> fooValues = stringMap.get("foo");
assertEquals(2, fooValues.size());
assertEquals("bar", fooValues.get(0));
assertEquals("far", fooValues.get(1));
List<String> barValues = stringMap.get("bar");
assertEquals(1, barValues.size());
assertEquals("rab", barValues.get(0));
}
@Test
public void testAnotherImplementation() {
ListMap<String, String> stringMap = new ListMap<>(IdentityHashMap.class);
String foo = "foo";
String bar = "bar";
String far = "far";
String rab = "rab";
stringMap.put(foo, bar);
stringMap.put(foo, far);
stringMap.put(bar, rab);
List<String> fooValues = stringMap.get(new String("foo"));
assertEquals(0, fooValues.size());
fooValues = stringMap.get(foo);
assertEquals(2, fooValues.size());
assertEquals("bar", fooValues.get(0));
assertEquals("far", fooValues.get(1));
List<String> barValues = stringMap.get(new String("bar"));
assertEquals(0, barValues.size());
barValues = stringMap.get(bar);
assertEquals(1, barValues.size());
assertEquals("rab", barValues.get(0));
}
@SuppressWarnings("serial")
private static class BoomMap extends HashMap<String, String> {
@SuppressWarnings("unused")
BoomMap() {
throw new RuntimeException();
}
}
@Test
public void testExplodingImplementation() {
boolean illegalArgument = false;
try {
new ListMap<String, String>(BoomMap.class);
} catch (IllegalArgumentException e) {
assertTrue(e.getCause().getClass() == RuntimeException.class);
illegalArgument = true;
}
assertTrue(illegalArgument);
}
private static final String A = "A";
private static final String B = "B";
private static final String B0 = "b0";
private ListMap<String, String> initSimpleMap() {
ListMap<String, String> lm = new ListMap<>();
lm.put(A, "a0");
lm.put(A, "a1");
lm.put(B, B0);
lm.put(B, "b1");
lm.put("C", "c");
lm.put("D", "d");
return lm;
}
@Test
public void testRemoval() {
ListMap<String, String> lm = initSimpleMap();
assertEquals(2, lm.getList(A).size());
assertEquals(4, lm.entrySet().size());
lm.removeAll(A);
assertEquals(3, lm.entrySet().size());
assertEquals(0, lm.getList(A).size());
assertEquals(2, lm.getList(B).size());
assertTrue(lm.removeValue(B, B0));
assertFalse(lm.removeValue(B, B0));
assertEquals(1, lm.getList(B).size());
assertEquals(3, lm.entrySet().size());
}
@Test
public void testGetSet() {
ListMap<String, String> lm = initSimpleMap();
lm.removeAll(B);
Set<Map.Entry<String, List<String>>> l = lm.entrySet();
assertEquals(3, l.size());
boolean hasA = false;
boolean hasB = false;
for (Map.Entry<String, List<String>> e : l) {
if (e.getKey().equals(A)) {
hasA = true;
} else if (e.getKey().equals(B)) {
hasB = true;
}
}
assertTrue(hasA);
assertFalse(hasB);
}
@Test
public void testFreeze() {
ListMap<String, String> map = initSimpleMap();
map.freeze();
try {
map.put("key", "value");
fail("Expected exception");
}
catch (Exception expected) {
}
try {
map.entrySet().iterator().next().getValue().add("foo");
fail("Expected exception");
}
catch (Exception expected) {
}
}
}
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