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// Copyright 2021 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.collect.nestedset;
import static com.google.common.truth.Truth.assertThat;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link NestedSetVisitor}. */
@RunWith(JUnit4.class)
public final class NestedSetVisitorTest {
@Test
public void stableOrder() throws InterruptedException {
NestedSet<Integer> set =
NestedSetBuilder.<Integer>stableOrder()
.addTransitive(NestedSetBuilder.<Integer>stableOrder().add(1).add(2).add(3).build())
.add(4)
.add(5)
.add(6)
.addTransitive(NestedSetBuilder.<Integer>stableOrder().add(7).add(8).add(9).build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
assertThat(visited).isEqualTo(set.toList());
}
@Test
public void compileOrder() throws InterruptedException {
NestedSet<Integer> set =
NestedSetBuilder.<Integer>compileOrder()
.addTransitive(NestedSetBuilder.<Integer>compileOrder().add(1).add(2).add(3).build())
.add(4)
.add(5)
.add(6)
.addTransitive(NestedSetBuilder.<Integer>compileOrder().add(7).add(8).add(9).build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
assertThat(visited).isEqualTo(set.toList());
}
@Test
public void linkOrder() throws InterruptedException {
NestedSet<Integer> set =
NestedSetBuilder.<Integer>linkOrder()
.addTransitive(NestedSetBuilder.<Integer>linkOrder().add(1).add(2).add(3).build())
.add(4)
.add(5)
.add(6)
.addTransitive(NestedSetBuilder.<Integer>linkOrder().add(7).add(8).add(9).build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
// #toList() for LINK_ORDER reverses the result list.
assertThat(visited).isEqualTo(set.toList().reverse());
}
@Test
public void naiveLinkOrder() throws InterruptedException {
NestedSet<Integer> set =
NestedSetBuilder.<Integer>naiveLinkOrder()
.addTransitive(NestedSetBuilder.<Integer>naiveLinkOrder().add(1).add(2).add(3).build())
.add(4)
.add(5)
.add(6)
.addTransitive(NestedSetBuilder.<Integer>naiveLinkOrder().add(7).add(8).add(9).build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
assertThat(visited).isEqualTo(set.toList());
}
@Test
public void mixedOrders() throws InterruptedException {
NestedSet<Integer> set =
NestedSetBuilder.<Integer>stableOrder()
.addTransitive(
NestedSetBuilder.<Integer>linkOrder()
.add(1)
.addTransitive(NestedSetBuilder.<Integer>linkOrder().add(2).add(3).build())
.addTransitive(NestedSetBuilder.<Integer>linkOrder().add(4).add(5).build())
.build())
.add(6)
.add(7)
.add(8)
.addTransitive(
NestedSetBuilder.<Integer>naiveLinkOrder()
.addTransitive(NestedSetBuilder.<Integer>naiveLinkOrder().add(7).add(8).build())
.addTransitive(
NestedSetBuilder.<Integer>naiveLinkOrder().add(9).add(10).build())
.add(11)
.build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
assertThat(visited).isEqualTo(set.toList());
}
@Test
public void duplicatesSkipped() throws InterruptedException {
NestedSet<Integer> subset =
NestedSetBuilder.<Integer>compileOrder().add(1).add(2).add(3).build();
NestedSet<Integer> set =
NestedSetBuilder.<Integer>compileOrder()
.addTransitive(subset)
.addTransitive(
NestedSetBuilder.<Integer>compileOrder().add(4).addTransitive(subset).build())
.add(5)
.add(6)
.add(7)
.addTransitive(
NestedSetBuilder.<Integer>compileOrder()
.add(8)
.add(9)
.addTransitive(subset)
.build())
.build();
List<Integer> visited = new ArrayList<>();
new NestedSetVisitor<Integer>(visited::add, new HashSet<>()::add).visit(set);
assertThat(visited).isEqualTo(set.toList());
assertThat(visited).hasSize(9);
}
}