RunInThreadStatementTest.java

/**
 * Copyright (c) 2014 - 2017 Frank Appel
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Frank Appel - initial API and implementation
 */
package com.codeaffine.test.util.util.concurrent;

import static com.codeaffine.test.util.lang.ThrowableCaptor.thrownBy;
import static java.lang.Thread.currentThread;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mockito.Mockito.doThrow;
import static org.mockito.Mockito.mock;

import org.junit.Test;
import org.junit.runners.model.Statement;

public class RunInThreadStatementTest {

  @Test
  public void evaluate() throws Throwable {
    ThreadCaptor captor = new ThreadCaptor();
    RunInThreadStatement statement = createWithBase( captor );

    statement.evaluate();

    assertThat( captor.getExecutionThread() )
      .isNotNull()
      .isNotSameAs( currentThread() );
  }

  @Test
  public void evaluateOnFailure() throws Throwable {
    AssertionError expected = new AssertionError();
    RunInThreadStatement statement = createWithBaseThatThrows( expected );

    Throwable actual = thrownBy( () -> statement.evaluate() );

    assertThat( actual ).isSameAs( expected );
  }

  @Test
  public void evaluateOnException() throws Throwable {
    Exception expected = new Exception();
    RunInThreadStatement statement = createWithBaseThatThrows( expected );

    Throwable actual = thrownBy( () -> statement.evaluate() );

    assertThat( actual ).isSameAs( expected );
  }

  private static RunInThreadStatement createWithBaseThatThrows( Throwable toBeThrown ) throws Throwable {
    Statement base = mock( Statement.class );
    doThrow( toBeThrown ).when( base ).evaluate();
    return createWithBase( base );
  }

  private static RunInThreadStatement createWithBase( Statement base ) {
    return new RunInThreadStatement( base );
  }
}