CatchExceptionBddTest.java

/**
 * Copyright (C) 2011 rwoo@gmx.de
 *
 * 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.googlecode.catchexception.apis;

import static com.googlecode.catchexception.CatchException.caughtException;
import static com.googlecode.catchexception.apis.CatchExceptionBdd.then;
import static com.googlecode.catchexception.apis.CatchExceptionBdd.thenThrown;
import static com.googlecode.catchexception.apis.CatchExceptionBdd.when;
import static org.junit.Assert.assertEquals;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.junit.Test;

/**
 * Tests {@link CatchExceptionBdd}.
 * 
 * @author rwoo
 * 
 */
@SuppressWarnings("javadoc")
public class CatchExceptionBddTest {

    @SuppressWarnings("rawtypes")
    @Test
    public void testThen() {
        // given an empty list
        List myList = new ArrayList();

        // when we try to get first element of the list
        when(myList).get(1);

        // then we expect an IndexOutOfBoundsException
        then(caughtException()) //
                .isInstanceOf(IndexOutOfBoundsException.class) //
                .hasMessage("Index: 1, Size: 0") //
                .hasNoCause();

        // test: caughtException() ==null
        try {
            then(null).isInstanceOf(IndexOutOfBoundsException.class);

        } catch (AssertionError e) {
            assertEquals("expecting actual not to be null", e.getMessage());
        }

        // test: caughtException() == new RuntimeException()
        try {
            then(new RuntimeException()).isInstanceOf(
                    IndexOutOfBoundsException.class);

        } catch (AssertionError e) {
            assertEquals(
                    "expected <java.lang.RuntimeException> to be an instance of:" //
                            + "\n<java.lang.IndexOutOfBoundsException>" //
                            + "\nbut was instance of:" //
                            + "\n<java.lang.RuntimeException>", e.getMessage());
        }

        // test: caughtException() has other unexpected message
        try {
            then(caughtException()) //
                    .isInstanceOf(IndexOutOfBoundsException.class) //
                    .hasMessageStartingWith("Index: 1") //
                    .hasMessageEndingWith("Size: 0") //
                    .hasMessageContaining("Size") //
                    .hasMessage("Hi!");

        } catch (AssertionError e) {
            assertEquals("expected message:" //
                    + "\n<'Hi!'>" //
                    + "\n but was:" //
                    + "\n<'Index: 1, Size: 0'>", e.getMessage());
        }
    }

    @SuppressWarnings("rawtypes")
    @Test
    public void testThenThrown() {

        // given a list with nine elements
        List myList = Arrays.asList(1, 2, 3, 4, 5, 6, 7, 8, 9);

        // when we try to get the 500th element
        when(myList).get(500);

        // then we expect an IndexOutOfBoundsException
        thenThrown(IndexOutOfBoundsException.class);

        // test: caughtException() ==null
        when(myList).get(0);
        try {
            thenThrown(IndexOutOfBoundsException.class);

        } catch (AssertionError e) {
            assertEquals("Neither an exception of type java.lang."
                    + "IndexOutOfBoundsException nor another exception "
                    + "was thrown", e.getMessage());
        }

        // test: caughtException() is not IllegalArgumentException
        when(myList).get(500);
        try {
            thenThrown(IllegalArgumentException.class);

        } catch (AssertionError e) {
            assertEquals("Exception of type java.lang.IllegalArgumentException"
                    + " expected but was not thrown. Instead an exception of"
                    + " type class java.lang.ArrayIndexOutOfBoundsException"
                    + " with message '500' was thrown.", e.getMessage());
        }

    }

}