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Top1WithTiesPipeTest.scala
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Top1WithTiesPipeTest.scala
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.cypher.internal.compatibility.v3_3.runtime.pipes
import org.neo4j.cypher.ValueComparisonHelper.beEquivalentTo
import org.neo4j.cypher.internal.frontend.v3_3.symbols._
import org.neo4j.cypher.internal.frontend.v3_3.test_helpers.CypherFunSuite
class Top1WithTiesPipeTest extends CypherFunSuite {
test("empty input gives empty output") {
val source = new FakePipe(List(), "x" -> CTAny)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization) should be(empty)
}
test("simple sorting works as expected") {
val list = List(Map("x" -> "B"), Map("x" -> "A")).iterator
val source = new FakePipe(list, "x" -> CTString)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(Map("x" -> "A")))
}
test("two ties for the first place are all returned") {
val input = List(
Map("x" -> 1, "y" -> 1),
Map("x" -> 1, "y" -> 2),
Map("x" -> 2, "y" -> 3),
Map("x" -> 2, "y" -> 4)
).iterator
val source = new FakePipe(input, "x" -> CTInteger, "y" -> CTInteger)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(
Map("x" -> 1, "y" -> 1),
Map("x" -> 1, "y" -> 2)))
}
test("if only null is present, it should be returned") {
val input = List(
Map[String,Any]("x" -> null, "y" -> 1),
Map[String,Any]("x" -> null, "y" -> 2)
).iterator
val source = new FakePipe(input, "x" -> CTInteger, "y" -> CTInteger)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(
Map("x" -> null, "y" -> 1),
Map("x" -> null, "y" -> 2)))
}
test("null should not be returned if other values are present") {
val input = List(
Map[String,Any]("x" -> 1, "y" -> 1),
Map[String,Any]("x" -> null, "y" -> 2),
Map[String,Any]("x" -> 2, "y" -> 3)
).iterator
val source = new FakePipe(input, "x" -> CTInteger, "y" -> CTInteger)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(
Map("x" -> 1, "y" -> 1)))
}
test("comparing arrays") {
val smaller = Array(1, 2)
val input = List(
Map[String,Any]("x" -> Array(3,4), "y" -> 2),
Map[String,Any]("x" -> smaller, "y" -> 1)
).iterator
val source = new FakePipe(input, "x" -> CTInteger, "y" -> CTInteger)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(
Map("x" -> smaller, "y" -> 1)
))
}
test("comparing numbers and strings") {
val input = List(
Map[String,Any]("x" -> 1, "y" -> 1),
Map[String,Any]("x" -> "A", "y" -> 2)
).iterator
val source = new FakePipe(input, "x" -> CTInteger, "y" -> CTInteger)
val sortPipe = Top1WithTiesPipe(source, List(Ascending("x")))()
sortPipe.createResults(QueryStateHelper.emptyWithValueSerialization).toList should beEquivalentTo(List(
Map("x" -> "A", "y" -> 2)
))
}
}