UnitedThrowTest.java

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package com.jcabi.aspects;

import java.io.FileNotFoundException;
import java.io.IOException;
import org.hamcrest.MatcherAssert;
import org.hamcrest.Matchers;
import org.junit.Test;

/**
 * Tests for {@link UnitedThrow}.
 * @author Krzysztof Krason (Krzysztof.Krason@gmail.com)
 * @version $Id: a3b9f96813ad4f6b55a8ef0c1a54d33a8259fa53 $
 */
public final class UnitedThrowTest {

    /**
     * UnitedThrow can rethrow exception that is a subclass of declared one.
     * @throws Exception If something goes wrong
     */
    @Test(expected = IOException.class)
    public void rethrowsDeclaredException() throws Exception {
        new UnitedThrowTest.Thrower().file();
    }

    /**
     * UnitedThrow can throw first declared exception.
     * @throws Exception If something goes wrong
     */
    @Test(expected = IOException.class)
    public void throwsDeclaredException() throws Exception {
        new UnitedThrowTest.Thrower().save();
    }

    /**
     * UnitedThrow can throw configured exception.
     * @throws Exception If something goes wrong
     */
    @Test(expected = IOException.class)
    public void throwsConfiguredException() throws Exception {
        new UnitedThrowTest.Thrower().multiple();
    }

    /**
     * UnitedThrow can throw IllegalStateException when no exception declared.
     * @throws Exception If something goes wrong
     */
    @Test(expected = IllegalStateException.class)
    public void throwsIllegalStateException() throws Exception {
        new UnitedThrowTest.Thrower().def();
    }

    /**
     * UnitedThrow can encapsulate thrown exception inside declared one.
     * @throws Exception If something goes wrong
     */
    @Test
    public void throwsOriginalExceptionEncapsulatedInsideDeclared()
        throws Exception {
        try {
            new UnitedThrowTest.Thrower().encapsulate();
        } catch (final IOException ex) {
            MatcherAssert.assertThat(
                ex.getCause(),
                Matchers.instanceOf(IllegalStateException.class)
            );
        }
    }

    /**
     * Class for testing UnitedThrow.
     */
    private static final class Thrower {
        /**
         * Test method.
         * @throws IOException In case of exception.
         */
        @UnitedThrow
        public void save() throws IOException {
            throw new IllegalStateException();
        }

        /**
         * Test method.
         * @throws IOException In case of exception.
         */
        @UnitedThrow
        public void file() throws IOException {
            throw new FileNotFoundException();
        }

        /**
         * Test method.
         * @throws InterruptedException In case of exception.
         * @throws IOException In case of exception.
         * @checkstyle ThrowsCountCheck (3 lines)
         */
        @UnitedThrow(IOException.class)
        public void multiple() throws InterruptedException, IOException {
            throw new IllegalStateException();
        }

        /**
         * Test method.
         */
        @UnitedThrow
        public void def() {
            throw new IllegalArgumentException();
        }

        /**
         * Test method.
         * @throws IOException In case of exception.
         */
        @UnitedThrow(IOException.class)
        public void encapsulate() throws IOException {
            throw new IllegalStateException();
        }
    }
}