101 lines
3.5 KiB
Kotlin
101 lines
3.5 KiB
Kotlin
/*
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* MIT License
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*
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* Copyright (c) 2019 norangebit
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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*/
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package it.norangeb.algorithms.graph.operations
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import it.norangeb.algorithms.graph.DiGraph
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import org.amshove.kluent.`should be equal to`
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import org.amshove.kluent.`should equal`
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import org.spekframework.spek2.Spek
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import org.spekframework.spek2.style.gherkin.Feature
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object TopologicalOrderTest : Spek({
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Feature("topological order") {
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Scenario("topological order on DAG") {
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val dag by memoized { DiGraph() }
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Given("a dag") {
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dag.addEdge(0, 1)
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dag.addEdge(0, 2)
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dag.addEdge(0, 5)
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dag.addEdge(1, 4)
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dag.addEdge(3, 2)
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dag.addEdge(3, 4)
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dag.addEdge(3, 5)
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dag.addEdge(3, 6)
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dag.addEdge(5, 2)
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dag.addEdge(6, 0)
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dag.addEdge(6, 4)
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}
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lateinit var result: TopologicalOrder
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When("calculate the topological order") {
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result = TopologicalOrder(dag)
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}
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Then("isDag should be true") {
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result.isDag() `should be equal to` true
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}
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Then("topological order should equal listOf(3, 6, 0, 5, 2, 1, 4") {
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result.order `should equal` listOf(3, 6, 0, 5, 2, 1, 4)
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}
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}
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Scenario("topological order into cyclic graph") {
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val cyclicGraph by memoized { DiGraph() }
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Given("a cyclic graph") {
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cyclicGraph.addEdge(0, 1)
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cyclicGraph.addEdge(0, 2)
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cyclicGraph.addEdge(0, 5)
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cyclicGraph.addEdge(1, 4)
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cyclicGraph.addEdge(3, 2)
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cyclicGraph.addEdge(3, 4)
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cyclicGraph.addEdge(3, 5)
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cyclicGraph.addEdge(3, 6)
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cyclicGraph.addEdge(4, 6)
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cyclicGraph.addEdge(5, 2)
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cyclicGraph.addEdge(6, 0)
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cyclicGraph.addEdge(6, 4)
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}
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lateinit var result: TopologicalOrder
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When("compute the topological order") {
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result = TopologicalOrder(cyclicGraph)
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}
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Then("isDag should be false") {
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result.isDag() `should be equal to` false
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}
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Then("order should be null") {
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result.order `should equal` null
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}
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}
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}
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}) |