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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 static org.junit.jupiter.api.Assertions.assertThrows;
import com.code_intelligence.jazzer.mutation.annotation.NotNull;
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.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import org.junit.jupiter.api.Test;
class EnumMutatorTest {
enum TestEnumOne { A }
enum TestEnum { A, B, C }
@Test
void testBoxed() {
SerializingMutator<TestEnum> mutator =
(SerializingMutator<TestEnum>) LangMutators.newFactory().createOrThrow(
new TypeHolder<@NotNull TestEnum>() {}.annotatedType());
assertThat(mutator.toString()).isEqualTo("Enum<TestEnum>");
TestEnum cl;
try (MockPseudoRandom prng = mockPseudoRandom(0)) {
cl = mutator.init(prng);
}
assertThat(cl).isEqualTo(TestEnum.A);
try (MockPseudoRandom prng = mockPseudoRandom(1)) {
cl = mutator.mutate(cl, prng);
}
assertThat(cl).isEqualTo(TestEnum.B);
try (MockPseudoRandom prng = mockPseudoRandom(0)) {
cl = mutator.mutate(cl, prng);
}
assertThat(cl).isEqualTo(TestEnum.A);
try (MockPseudoRandom prng = mockPseudoRandom(2)) {
cl = mutator.mutate(cl, prng);
}
assertThat(cl).isEqualTo(TestEnum.C);
try (MockPseudoRandom prng = mockPseudoRandom(1)) {
cl = mutator.mutate(cl, prng);
}
assertThat(cl).isEqualTo(TestEnum.B);
}
@Test
void testEnumWithOneElementShouldThrow() {
assertThrows(IllegalArgumentException.class, () -> {
LangMutators.newFactory().createOrThrow(
new TypeHolder<@NotNull TestEnumOne>() {}.annotatedType());
}, "When trying to build mutators for Enum with one value, an Exception should be thrown.");
}
@Test
void testEnumBasedOnInvalidInput() throws IOException {
SerializingMutator<TestEnum> mutator =
(SerializingMutator<TestEnum>) LangMutators.newFactory().createOrThrow(
new TypeHolder<@NotNull TestEnum>() {}.annotatedType());
ByteArrayOutputStream bo = new ByteArrayOutputStream();
DataOutputStream os = new DataOutputStream(bo);
// Valid values
os.writeInt(0);
os.writeInt(1);
os.writeInt(2);
// Too high indices wrap around
os.writeInt(3);
// Abs. value is used to calculate the index
os.writeInt(-3);
DataInputStream is = new DataInputStream(new ByteArrayInputStream(bo.toByteArray()));
assertThat(mutator.read(is)).isEqualTo(TestEnum.A);
assertThat(mutator.read(is)).isEqualTo(TestEnum.B);
assertThat(mutator.read(is)).isEqualTo(TestEnum.C);
assertThat(mutator.read(is)).isEqualTo(TestEnum.A);
assertThat(mutator.read(is)).isEqualTo(TestEnum.A);
}
}
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