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// Copyright (C) 2018 The Android Open Source Project
//
// 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.gerrit.extensions.conditions;
import static com.google.gerrit.extensions.conditions.BooleanCondition.and;
import static com.google.gerrit.extensions.conditions.BooleanCondition.not;
import static com.google.gerrit.extensions.conditions.BooleanCondition.or;
import static com.google.gerrit.extensions.conditions.BooleanCondition.valueOf;
import static org.junit.Assert.assertEquals;
import org.junit.Test;
public class BooleanConditionTest {
private static final BooleanCondition NO_TRIVIAL_EVALUATION =
new BooleanCondition() {
@Override
public boolean value() {
throw new UnsupportedOperationException("value() is not supported");
}
@Override
public <T> Iterable<T> children(Class<T> type) {
throw new UnsupportedOperationException("children(Class<T> type) is not supported");
}
@Override
public BooleanCondition reduce() {
return this;
}
@Override
protected boolean evaluatesTrivially() {
return false;
}
};
@Test
public void reduceAnd_CutOffNonTrivialWhenPossible() throws Exception {
BooleanCondition nonReduced = and(false, NO_TRIVIAL_EVALUATION);
BooleanCondition reduced = valueOf(false);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceAnd_CutOffNonTrivialWhenPossibleSwapped() throws Exception {
BooleanCondition nonReduced = and(NO_TRIVIAL_EVALUATION, valueOf(false));
BooleanCondition reduced = valueOf(false);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceAnd_KeepNonTrivialWhenNoCutOffPossible() throws Exception {
BooleanCondition nonReduced = and(true, NO_TRIVIAL_EVALUATION);
BooleanCondition reduced = and(true, NO_TRIVIAL_EVALUATION);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceAnd_KeepNonTrivialWhenNoCutOffPossibleSwapped() throws Exception {
BooleanCondition nonReduced = and(NO_TRIVIAL_EVALUATION, valueOf(true));
BooleanCondition reduced = and(NO_TRIVIAL_EVALUATION, valueOf(true));
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceOr_CutOffNonTrivialWhenPossible() throws Exception {
BooleanCondition nonReduced = or(true, NO_TRIVIAL_EVALUATION);
BooleanCondition reduced = valueOf(true);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceOr_CutOffNonTrivialWhenPossibleSwapped() throws Exception {
BooleanCondition nonReduced = or(NO_TRIVIAL_EVALUATION, valueOf(true));
BooleanCondition reduced = valueOf(true);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceOr_KeepNonTrivialWhenNoCutOffPossible() throws Exception {
BooleanCondition nonReduced = or(false, NO_TRIVIAL_EVALUATION);
BooleanCondition reduced = or(false, NO_TRIVIAL_EVALUATION);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceOr_KeepNonTrivialWhenNoCutOffPossibleSwapped() throws Exception {
BooleanCondition nonReduced = or(NO_TRIVIAL_EVALUATION, valueOf(false));
BooleanCondition reduced = or(NO_TRIVIAL_EVALUATION, valueOf(false));
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceNot_ReduceIrrelevant() throws Exception {
BooleanCondition nonReduced = not(valueOf(true));
BooleanCondition reduced = valueOf(false);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceNot_ReduceIrrelevant2() throws Exception {
BooleanCondition nonReduced = not(valueOf(false));
BooleanCondition reduced = valueOf(true);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceNot_KeepNonTrivialWhenNoCutOffPossible() throws Exception {
BooleanCondition nonReduced = not(NO_TRIVIAL_EVALUATION);
BooleanCondition reduced = not(NO_TRIVIAL_EVALUATION);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceComplexTreeToSingleValue() throws Exception {
// AND
// / \
// OR NOT
// / \ \
// NTE NTE TRUE
BooleanCondition nonReduced =
and(or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), not(valueOf(true)));
BooleanCondition reduced = valueOf(false);
assertEquals(nonReduced.reduce(), reduced);
}
@Test
public void reduceComplexTreeToSmallerTree() throws Exception {
// AND
// / \
// OR OR
// / \ / \
// NTE NTE T F
BooleanCondition nonReduced =
and(or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), or(valueOf(true), valueOf(false)));
BooleanCondition reduced = and(or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), valueOf(true));
assertEquals(nonReduced.reduce(), reduced);
}
}
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