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TMap new methods are covered with tests

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This commit is contained in:
Sergey Kapralov 2016-08-25 17:12:03 +03:00
parent 6b950e618e
commit d1ade89ed4
2 changed files with 260 additions and 6 deletions
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12
classlib/src/main/java/org/teavm/classlib/java/util/TMap.java
View File

@ -92,12 +92,13 @@ public interface TMap<K, V> {
V oldValue = v; V oldValue = v;
V newValue = remappingFunction.apply(key, oldValue); V newValue = remappingFunction.apply(key, oldValue);
if (newValue != null) { if (newValue != null) {
return put(key, newValue); put(key, newValue);
} else { } else {
return remove(key); remove(key);
} }
return newValue;
} }
return v; return null;
} }
default V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) { default V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
@ -120,9 +121,10 @@ public interface TMap<K, V> {
V newValue = (oldValue == null) ? value V newValue = (oldValue == null) ? value
: remappingFunction.apply(oldValue, value); : remappingFunction.apply(oldValue, value);
if (newValue == null) { if (newValue == null) {
return remove(key); remove(key);
} else { } else {
return put(key, newValue); put(key, newValue);
} }
return newValue;
} }
} }

254
tests/src/test/java/org/teavm/classlib/java/util/HashtableTest.java
View File

@ -731,7 +731,7 @@ public class HashtableTest {
} }
@Test @Test
public void test_computeRemovesEntryOnNullMapping() { public void test_computeRemovesEntryWhenNullProduced() {
Hashtable<String, String> ht10 = new Hashtable<>(); Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) { for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i); ht10.put("Key" + i, "Val" + i);
@ -750,6 +750,258 @@ public class HashtableTest {
} }
} }
@Test
public void test_computeIfAbsentNominal() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfAbsent("absent key", (k) -> "added");
assertEquals("added", newVal);
assertEquals(11, ht10.size());
for(int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
assertEquals("New value expected","added", ht10.get("absent key"));
}
@Test
public void test_computeIfAbsentIgnoresExistingEntry() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfAbsent("Key5", (v) -> "changed");
assertEquals("Val5", newVal);
assertEquals(10, ht10.size());
for(int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
@Test
public void test_computeIfAbsentDoesNothingIfNullProduced() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfAbsent("absent key", (v) -> null);
assertEquals(null, newVal);
assertEquals(10, ht10.size());
for(int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
@Test
public void test_computeIfPresentNominal() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfPresent("Key5", (k, v) -> "changed");
assertEquals("changed", newVal);
assertEquals(10, ht10.size());
for(int i = 0; i < 10; i++) {
if(i == 5) {
assertEquals("Value was incorrectly updated", "changed", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_computeIfPresentIgnoresAbsentKeys() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfPresent("absent key", (k, v) -> "added");
assertEquals(null, newVal);
assertEquals(10, ht10.size());
for(int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
@Test
public void test_computeIfPresentRemovesEntryWhenNullProduced() {
Hashtable<String, String> ht10 = new Hashtable<>();
for(int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.computeIfPresent("Key5", (k, v) -> null);
assertEquals(null, newVal);
assertEquals(9, ht10.size());
for(int i = 0; i < 10; i++) {
if(i == 5) {
assertNull("Value unexpectedly present", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_mergeKeyAbsentCase() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.merge("absent key", "changed", (k, v) -> "remapped");
assertEquals("changed", newVal);
assertEquals(11, ht10.size());
for (int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
assertEquals("New value expected", "changed", ht10.get("absent key"));
}
@Test
public void test_mergeKeyPresentCase() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.merge("Key5", "changed", (k, v) -> "remapped");
assertEquals("remapped", newVal);
assertEquals(10, ht10.size());
for (int i = 0; i < 10; i++) {
if (i == 5) {
assertEquals("Value was incorrectly updated", "remapped", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_mergeKeyAbsentCase_remapToNull() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.merge("absent key", "changed", (k, v) -> null);
assertEquals("changed", newVal);
assertEquals(11, ht10.size());
for (int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
assertEquals("New value expected", "changed", ht10.get("absent key"));
}
@Test
public void test_mergeKeyPresentCase_remapToNull() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.merge("Key5", "changed", (k, v) -> null);
assertEquals(null, newVal);
assertEquals(9, ht10.size());
for (int i = 0; i < 10; i++) {
if (i == 5) {
assertNull("Null value expected", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_replaceNominal() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.replace("Key5", "changed");
assertEquals("Val5", newVal);
assertEquals(10, ht10.size());
for (int i = 0; i < 10; i++) {
if (i == 5) {
assertEquals("Value was incorrectly updated", "changed", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_replaceAbsentKey() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
String newVal = ht10.replace("absent key", "changed");
assertEquals(null, newVal);
assertEquals(10, ht10.size());
for (int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
@Test
public void test_replace2Nominal() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
boolean replaced = ht10.replace("Key5", "Val5", "changed");
assertEquals(true, replaced);
assertEquals(10, ht10.size());
for (int i = 0; i < 10; i++) {
if (i == 5) {
assertEquals("Value was incorrectly updated", "changed", ht10.get("Key" + i));
} else {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
}
@Test
public void test_replace2WithIncorrectExpectation() {
Hashtable<String, String> ht10 = new Hashtable<>();
for (int i = 0; i < 10; i++) {
ht10.put("Key" + i, "Val" + i);
}
boolean replaced = ht10.replace("Key5", "incorrect value", "changed");
assertEquals(false, replaced);
assertEquals(10, ht10.size());
for (int i = 0; i < 10; i++) {
assertEquals("Value was unexpectedly changed", "Val" + i, ht10.get("Key" + i));
}
}
@SuppressWarnings("unchecked") @SuppressWarnings("unchecked")
protected <K, V> Hashtable<K, V> hashtableClone(Hashtable<K, V> s) { protected <K, V> Hashtable<K, V> hashtableClone(Hashtable<K, V> s) {
return (Hashtable<K, V>) s.clone(); return (Hashtable<K, V>) s.clone();