/*
 * Copyright 2015 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.model

import org.gradle.integtests.fixtures.AbstractIntegrationSpec
import org.gradle.integtests.fixtures.EnableModelDsl

class ConfigurationCycleIntegrationTest extends AbstractIntegrationSpec {

    def "configuration cycle error contains information useful for troubleshooting"() {
        given:
        EnableModelDsl.enable(executer)

        when:
        buildScript '''
            import org.gradle.model.*
            import org.gradle.model.collection.*

            class Rules extends RuleSource {
                @Model
                String first(@Path("second") String second) {
                    "foo"
                }

                @Model
                String second() {
                    "bar"
                }

                @Model
                String third(@Path("first") String first) {
                    "fizz"
                }

                @Mutate
                void connectTasksToFirst(CollectionBuilder<Task> tasks, @Path("first") String first) {
                }
            }

            apply type: Rules

            model {
                second {
                    $("third")
                }
            }
        '''

        then:
        fails "tasks"

        and:
        failure.assertHasCause("""A cycle has been detected in model rule dependencies. References forming the cycle:
Rules#first(java.lang.String) parameter 1 (path: second)
  \\--- model.second @ build file '${buildFile}' line 29, column 17 @ line 30 (path: third)
    \\--- Rules#third(java.lang.String) parameter 1 (path: first)
      \\--- Rules#first(java.lang.String)""")
    }
}
