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/*
* Copyright 2023 Code Intelligence GmbH
*
* Licensed 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 com.code_intelligence.jazzer.mutation.mutator.lang;
import static com.code_intelligence.jazzer.mutation.support.TestSupport.mockPseudoRandom;
import static com.google.common.truth.Truth.assertThat;
import com.code_intelligence.jazzer.mutation.annotation.NotNull;
import com.code_intelligence.jazzer.mutation.api.ChainedMutatorFactory;
import com.code_intelligence.jazzer.mutation.api.SerializingMutator;
import com.code_intelligence.jazzer.mutation.support.TestSupport.MockPseudoRandom;
import com.code_intelligence.jazzer.mutation.support.TypeHolder;
import java.lang.reflect.AnnotatedType;
import org.junit.jupiter.api.Test;
@SuppressWarnings("unchecked")
class NullableMutatorTest {
@Test
void testNullable() {
SerializingMutator<Boolean> mutator =
new ChainedMutatorFactory(new NullableMutatorFactory(), new BooleanMutatorFactory())
.createOrThrow(Boolean.class);
assertThat(mutator.toString()).isEqualTo("Nullable<Boolean>");
Boolean bool;
try (MockPseudoRandom prng = mockPseudoRandom(/* init to null */ true)) {
bool = mutator.init(prng);
}
assertThat(bool).isNull();
try (MockPseudoRandom prng = mockPseudoRandom(/* init for non-null Boolean */ false)) {
bool = mutator.mutate(bool, prng);
}
assertThat(bool).isFalse();
try (MockPseudoRandom prng = mockPseudoRandom(/* mutate to non-null Boolean */ false)) {
bool = mutator.mutate(bool, prng);
}
assertThat(bool).isTrue();
try (MockPseudoRandom prng = mockPseudoRandom(/* mutate to null */ true)) {
bool = mutator.mutate(bool, prng);
}
assertThat(bool).isNull();
}
@Test
void testNotNull() {
ChainedMutatorFactory factory =
new ChainedMutatorFactory(new NullableMutatorFactory(), new BooleanMutatorFactory());
AnnotatedType notNullBoolean = new TypeHolder<@NotNull Boolean>() {}.annotatedType();
SerializingMutator<Boolean> mutator =
(SerializingMutator<Boolean>) factory.createOrThrow(notNullBoolean);
assertThat(mutator.toString()).isEqualTo("Boolean");
}
@Test
void testPrimitive() {
ChainedMutatorFactory factory =
new ChainedMutatorFactory(new NullableMutatorFactory(), new BooleanMutatorFactory());
SerializingMutator<Boolean> mutator = factory.createOrThrow(boolean.class);
assertThat(mutator.toString()).isEqualTo("Boolean");
}
@Test
void testCrossOver() {
SerializingMutator<Boolean> mutator =
new ChainedMutatorFactory(new NullableMutatorFactory(), new BooleanMutatorFactory())
.createOrThrow(Boolean.class);
try (MockPseudoRandom prng = mockPseudoRandom(true)) {
Boolean valueCrossedOver = mutator.crossOver(Boolean.TRUE, Boolean.TRUE, prng);
assertThat(valueCrossedOver).isNotNull();
}
try (MockPseudoRandom prng = mockPseudoRandom()) {
Boolean bothNull = mutator.crossOver(null, null, prng);
assertThat(bothNull).isNull();
}
try (MockPseudoRandom prng = mockPseudoRandom(false)) {
Boolean oneNotNull = mutator.crossOver(null, Boolean.TRUE, prng);
assertThat(oneNotNull).isNotNull();
}
try (MockPseudoRandom prng = mockPseudoRandom(true)) {
Boolean nullFrequency = mutator.crossOver(null, Boolean.TRUE, prng);
assertThat(nullFrequency).isNull();
}
}
}
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