// GPars - Groovy Parallel Systems
//
// Copyright © 2008-11  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 groovyx.gpars.dataflow

import spock.lang.Specification

class DFSpockTest extends Specification {

    def "data flow variable gets assigned"() {
        def result = new DataflowVariable()
        when: result << 10
        then:
        result.val == 10
        result.isBound()
    }

    def "data flow variable cannot be re-assigned"() {
        def result = new DataflowVariable()
        given: result << 10
        when: result << 20
        then:
        thrown(IllegalStateException)
        result.val == 10
        result.isBound()
    }
}
