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Groovy: A powerful, dynamic language for the JVM

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/*
 * Copyright 2003-2007 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 groovy.mock.interceptor

import junit.framework.AssertionFailedError

/**
    The object that registers method calls on it for the use with Mocks and Stubs.
    For each call a CallSpec object is added to the recorded list.
    @author Dierk Koenig
*/

class Demand {

    def List recorded = []

    Object invokeMethod(String methodName, Object args) {
        def range = 1..1
        if (args[0] instanceof IntRange) {
            range = args[0]
            if (range.reverse) throw new IllegalArgumentException('Reverse ranges not supported.')
        }
        if (args[-1] instanceof Closure) {
            recorded << new CallSpec(name:methodName, behavior:args[-1], range:range)
        }
    }

    def verify(List calls) {
        for (i in 0 ..< recorded.size()) {
            def call = recorded[i]
            def callCounter = calls[i] ? calls[i] : 0
            if (! call.range.contains( callCounter ) ) {
                def msg = "verify[$i]: expected ${call.range.toString()} call(s) to '${call.name}' but was "
                throw new AssertionFailedError(msg + "called $callCounter time(s).")
            }
        }
    }

}

class CallSpec {
    String  name
    Closure behavior
    Range   range
}