/*
 *  Licensed to the Apache Software Foundation (ASF) under one
 *  or more contributor license agreements.  See the NOTICE file
 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you 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 geb.collection

import spock.lang.Specification
import spock.lang.Unroll

class FilteringIteratorSpec extends Specification {

    @Unroll
    def "filtering on predicate looking for non-null values"() {
        expect:
        new FilteringIterator(original.iterator(), { it != null }).toList() == notNull

        where:
        original                 | notNull
        []                       | []
        [null]                   | []
        [1]                      | [1]
        [null, 1, null]          | [1]
        [1, 2]                   | [1, 2]
        [null, null, 1, null, 2] | [1, 2]
        [1, null, 2, null, null] | [1, 2]
        [1, null, null, 2]       | [1, 2]
    }

    @Unroll
    def "filtering on predicate looking for null values"() {
        expect:
        new FilteringIterator(original.iterator(), { it == null }).toList() == nulls

        where:
        original                 | nulls
        []                       | []
        [null]                   | [null]
        [1]                      | []
        [null, 1, null]          | [null, null]
        [1, 2]                   | []
        [null, null, 1, null, 2] | [null, null, null]
        [1, null, 2, null, null] | [null, null, null]
        [1, null, null, 2]       | [null, null]
    }

}
