NegateConditionalsMutatorTest.java

/*
 * Copyright 2010 Henry Coles
 *
 * 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 org.pitest.mutationtest.engine.gregor.mutators;

import java.util.concurrent.Callable;

import org.junit.Before;
import org.junit.Test;
import org.pitest.mutationtest.engine.Mutant;
import org.pitest.mutationtest.engine.gregor.MutatorTestBase;

public class NegateConditionalsMutatorTest extends MutatorTestBase {

  @Before
  public void setupEngineToMutateOnlyConditionals() {
    createTesteeWith(NegateConditionalsMutator.NEGATE_CONDITIONALS_MUTATOR);
  }

  private static int getZeroButPreventInlining() {
    return 0;
  }

  private static class HasIFEQ implements Callable<String> {
    private final int i;

    HasIFEQ(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i != 0) {
        return "was not zero";
      } else {
        return "was zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFEQWithIFNE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFEQ.class);
    assertMutantCallableReturns(new HasIFEQ(1), mutant, "was zero");
    assertMutantCallableReturns(new HasIFEQ(0), mutant, "was not zero");
  }

  private static class HasIFNE implements Callable<String> {
    private final int i;

    HasIFNE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i == 0) {
        return "was zero";
      } else {
        return "was not zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFNEWithIFEQ() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFNE.class);
    assertMutantCallableReturns(new HasIFNE(1), mutant, "was zero");
    assertMutantCallableReturns(new HasIFNE(0), mutant, "was not zero");
  }

  private static class HasIFLE implements Callable<String> {
    private final int i;

    HasIFLE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i > 0) {
        return "was > zero";
      } else {
        return "was <= zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFLEWithIGT() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFLE.class);
    assertMutantCallableReturns(new HasIFLE(1), mutant, "was <= zero");
    assertMutantCallableReturns(new HasIFLE(-1), mutant, "was > zero");
    assertMutantCallableReturns(new HasIFLE(0), mutant, "was > zero");
  }

  private static class HasIFGE implements Callable<String> {
    private final int i;

    HasIFGE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i < 0) {
        return "was < zero";
      } else {
        return "was >= zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFGEWithIFLT() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFGE.class);
    assertMutantCallableReturns(new HasIFGE(-1), mutant, "was >= zero");
    assertMutantCallableReturns(new HasIFGE(1), mutant, "was < zero");
    assertMutantCallableReturns(new HasIFGE(0), mutant, "was < zero");
  }

  private static class HasIFGT implements Callable<String> {
    private final int i;

    HasIFGT(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i <= 0) {
        return "was <= zero";
      } else {
        return "was > zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFGTWithIFLE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFGT.class);
    assertMutantCallableReturns(new HasIFGT(-1), mutant, "was > zero");
    assertMutantCallableReturns(new HasIFGT(1), mutant, "was <= zero");
    assertMutantCallableReturns(new HasIFGT(0), mutant, "was > zero");
  }

  private static class HasIFLT implements Callable<String> {
    private final int i;

    HasIFLT(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i >= 0) {
        return "was >= zero";
      } else {
        return "was < zero";
      }
    }
  }

  @Test
  public void shouldReplaceIFLTWithIFGE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFLT.class);
    assertMutantCallableReturns(new HasIFLT(-1), mutant, "was >= zero");
    assertMutantCallableReturns(new HasIFLT(1), mutant, "was < zero");
    assertMutantCallableReturns(new HasIFLT(0), mutant, "was < zero");
  }

  private static class HasIFNULL implements Callable<String> {
    private final Object i;

    HasIFNULL(final Object i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i != null) {
        return "was not null";
      } else {
        return "was null";
      }
    }
  }

  @Test
  public void shouldReplaceIFNULLWithIFNONNULL() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFNULL.class);
    assertMutantCallableReturns(new HasIFNULL(null), mutant, "was not null");
    assertMutantCallableReturns(new HasIFNULL("foo"), mutant, "was null");
  }

  private static class HasIFNONNULL implements Callable<String> {
    private final Object i;

    HasIFNONNULL(final Object i) {
      this.i = i;
    }

    @Override
    public String call() {
      if (this.i == null) {
        return "was null";
      } else {
        return "was not null";
      }
    }
  }

  @Test
  public void shouldReplaceIFNONNULLWithIFNULL() throws Exception {
    final Mutant mutant = getFirstMutant(HasIFNONNULL.class);
    assertMutantCallableReturns(new HasIFNONNULL(null), mutant, "was not null");
    assertMutantCallableReturns(new HasIFNONNULL("foo"), mutant, "was null");
  }

  private static class HasIF_ICMPNE implements Callable<String> {
    private final int i;

    HasIF_ICMPNE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i == j) {
        return "was zero";
      } else {
        return "was not zero";
      }
    }
  }

  @Test
  public void shouldReplaceIF_ICMPNEWithIF_CMPEQ() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPNE.class);
    assertMutantCallableReturns(new HasIF_ICMPNE(1), mutant, "was zero");
    assertMutantCallableReturns(new HasIF_ICMPNE(0), mutant, "was not zero");
  }

  private static class HasIF_ICMPEQ implements Callable<String> {
    private final int i;

    HasIF_ICMPEQ(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i != j) {
        return "was not zero";
      } else {
        return "was zero";
      }
    }
  }

  @Test
  public void shouldReplaceIF_ICMPEQWithIF_CMPNE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPEQ.class);
    assertMutantCallableReturns(new HasIF_ICMPEQ(1), mutant, "was zero");
    assertMutantCallableReturns(new HasIF_ICMPEQ(0), mutant, "was not zero");
  }

  private static class HasIF_ICMPLE implements Callable<String> {
    private final int i;

    HasIF_ICMPLE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i > j) {
        return "was > zero";
      } else {
        return "was <= zero";
      }
    }
  }

  @Test
  public void shouldReplaceHasIF_ICMPLEWithHasIF_ICMPGT() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPLE.class);
    assertMutantCallableReturns(new HasIF_ICMPLE(1), mutant, "was <= zero");
    assertMutantCallableReturns(new HasIF_ICMPLE(-1), mutant, "was > zero");
    assertMutantCallableReturns(new HasIF_ICMPLE(0), mutant, "was > zero");
  }

  private static class HasIF_ICMPGE implements Callable<String> {
    private final int i;

    HasIF_ICMPGE(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i < j) {
        return "was < zero";
      } else {
        return "was >= zero";
      }
    }
  }

  @Test
  public void shouldReplaceIF_ICMPGEWithHasIF_ICMPLT() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPGE.class);
    assertMutantCallableReturns(new HasIF_ICMPGE(-1), mutant, "was >= zero");
    assertMutantCallableReturns(new HasIF_ICMPGE(1), mutant, "was < zero");
    assertMutantCallableReturns(new HasIF_ICMPGE(0), mutant, "was < zero");
  }

  private static class HasIF_ICMPGT implements Callable<String> {
    private final int i;

    HasIF_ICMPGT(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i <= j) {
        return "was <= zero";
      } else {
        return "was > zero";
      }
    }
  }

  @Test
  public void shouldReplaceHasIF_ICMPGTWithHasIF_ICMPLE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPGT.class);
    assertMutantCallableReturns(new HasIF_ICMPGT(-1), mutant, "was > zero");
    assertMutantCallableReturns(new HasIF_ICMPGT(1), mutant, "was <= zero");
    assertMutantCallableReturns(new HasIF_ICMPGT(0), mutant, "was > zero");
  }

  private static class HasIF_ICMPLT implements Callable<String> {
    private final int i;

    HasIF_ICMPLT(final int i) {
      this.i = i;
    }

    @Override
    public String call() {
      final int j = getZeroButPreventInlining();
      if (this.i >= j) {
        return "was >= zero";
      } else {
        return "was < zero";
      }
    }
  }

  @Test
  public void shouldReplaceHasIF_ICMPLTWithHasIF_ICMPGE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ICMPLT.class);
    assertMutantCallableReturns(new HasIF_ICMPLT(-1), mutant, "was >= zero");
    assertMutantCallableReturns(new HasIF_ICMPLT(1), mutant, "was < zero");
    assertMutantCallableReturns(new HasIF_ICMPLT(0), mutant, "was < zero");
  }

  private static class HasIF_ACMPNE implements Callable<String> {
    private final Object i;

    HasIF_ACMPNE(final Object i) {
      this.i = i;
    }

    @Override
    public String call() {
      final Object integer = Integer.class;
      if (this.i == integer) {
        return "was integer";
      } else {
        return "was not integer";
      }
    }
  }

  @Test
  public void shouldReplaceIF_ACMPNEWithIF_CMPEQ() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ACMPNE.class);
    printMutant(mutant);
    assertMutantCallableReturns(new HasIF_ACMPNE(String.class), mutant,
        "was integer");
    assertMutantCallableReturns(new HasIF_ACMPNE(Integer.class), mutant,
        "was not integer");
  }

  private static class HasIF_ACMPEQ implements Callable<String> {
    private final Object i;

    HasIF_ACMPEQ(final Object i) {
      this.i = i;
    }

    @Override
    public String call() {
      final Object integer = Integer.class;
      if (this.i != integer) {
        return "was not integer";
      } else {
        return "was integer";
      }
    }
  }

  @Test
  public void shouldReplaceIF_ACMPEQWithIF_CMPNE() throws Exception {
    final Mutant mutant = getFirstMutant(HasIF_ACMPEQ.class);
    assertMutantCallableReturns(new HasIF_ACMPEQ(String.class), mutant,
        "was integer");
    assertMutantCallableReturns(new HasIF_ACMPEQ(Integer.class), mutant,
        "was not integer");
  }

}