PreludeTest.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.functional.prelude;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.verify;

import java.io.PrintStream;

import org.junit.Test;
import org.mockito.Mockito;

public class PreludeTest {

  @Test
  public void isNullShouldReturnsTrueWhenNull() {
    assertTrue(Prelude.isNull().apply(null));
  }

  @Test
  public void isNullShouldReturnFalseWhenNotNull() {
    assertFalse(Prelude.isNull().apply(1));
  }

  @Test
  public void isNotNullShouldReturnFalseWhenNull() {
    assertFalse(Prelude.isNotNull().apply(null));
  }

  @Test
  public void isNotNullShouldReturnTrueWhenNotNull() {
    assertTrue(Prelude.isNotNull().apply(1));
  }

  @Test
  public void printToShouldPrintValueToStream() {
    final Integer i = Integer.valueOf(42);
    final PrintStream stream = Mockito.mock(PrintStream.class);
    Prelude.printTo(stream).apply(i);
    verify(stream).print(i);
  }

}