/*
 * Copyright 2011 the original author or authors.
 *
 * 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.gradle.util

import spock.lang.*
import java.util.concurrent.Callable

class StdoutSwapperTest extends Specification {

    def "can swap stdout"() {
        given:
        def original = System.out
        def bytes = new ByteArrayOutputStream()
        def stream = new PrintStream(bytes)
        def text = "abc"

        when:
        new StdoutSwapper().swap(stream, { 
            assert System.out.is(stream)
            print text 
        } as Callable)
        
        then:
        bytes.toString() == text
        
        and:
        System.out.is(original)
    }


}
