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// Copyright 2014 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.skyframe;
import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import com.google.common.collect.ImmutableList;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Simple tests for {@link CycleDeduper}. */
@RunWith(JUnit4.class)
public class CycleDeduperTest {
private CycleDeduper<String> cycleDeduper = new CycleDeduper<>();
@Test
public void simple() throws Exception {
assertThat(cycleDeduper.seen(ImmutableList.of("a", "b"))).isTrue();
assertThat(cycleDeduper.seen(ImmutableList.of("a", "b"))).isFalse();
assertThat(cycleDeduper.seen(ImmutableList.of("b", "a"))).isFalse();
assertThat(cycleDeduper.seen(ImmutableList.of("a", "b", "c"))).isTrue();
assertThat(cycleDeduper.seen(ImmutableList.of("b", "c", "a"))).isFalse();
assertThat(cycleDeduper.seen(ImmutableList.of("c", "a", "b"))).isFalse();
assertThat(cycleDeduper.seen(ImmutableList.of("b", "a", "c"))).isTrue();
assertThat(cycleDeduper.seen(ImmutableList.of("c", "b", "a"))).isFalse();
}
@Test
public void badCycle_Empty() throws Exception {
try {
cycleDeduper.seen(ImmutableList.<String>of());
fail();
} catch (IllegalStateException e) {
// Expected.
}
}
@Test
public void badCycle_NonUniqueMembers() throws Exception {
try {
cycleDeduper.seen(ImmutableList.<String>of("a", "b", "a"));
fail();
} catch (IllegalStateException e) {
// Expected.
}
}
}
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