| // 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 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 = BooleanCondition.and(false, NO_TRIVIAL_EVALUATION); |
| BooleanCondition reduced = BooleanCondition.valueOf(false); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceAnd_CutOffNonTrivialWhenPossibleSwapped() throws Exception { |
| BooleanCondition nonReduced = |
| BooleanCondition.and(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(false)); |
| BooleanCondition reduced = BooleanCondition.valueOf(false); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceAnd_KeepNonTrivialWhenNoCutOffPossible() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.and(true, NO_TRIVIAL_EVALUATION); |
| BooleanCondition reduced = BooleanCondition.and(true, NO_TRIVIAL_EVALUATION); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceAnd_KeepNonTrivialWhenNoCutOffPossibleSwapped() throws Exception { |
| BooleanCondition nonReduced = |
| BooleanCondition.and(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(true)); |
| BooleanCondition reduced = |
| BooleanCondition.and(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(true)); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceOr_CutOffNonTrivialWhenPossible() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.or(true, NO_TRIVIAL_EVALUATION); |
| BooleanCondition reduced = BooleanCondition.valueOf(true); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceOr_CutOffNonTrivialWhenPossibleSwapped() throws Exception { |
| BooleanCondition nonReduced = |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(true)); |
| BooleanCondition reduced = BooleanCondition.valueOf(true); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceOr_KeepNonTrivialWhenNoCutOffPossible() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.or(false, NO_TRIVIAL_EVALUATION); |
| BooleanCondition reduced = BooleanCondition.or(false, NO_TRIVIAL_EVALUATION); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceOr_KeepNonTrivialWhenNoCutOffPossibleSwapped() throws Exception { |
| BooleanCondition nonReduced = |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(false)); |
| BooleanCondition reduced = |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, BooleanCondition.valueOf(false)); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceNot_ReduceIrrelevant() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.not(BooleanCondition.valueOf(true)); |
| BooleanCondition reduced = BooleanCondition.valueOf(false); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceNot_ReduceIrrelevant2() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.not(BooleanCondition.valueOf(false)); |
| BooleanCondition reduced = BooleanCondition.valueOf(true); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceNot_KeepNonTrivialWhenNoCutOffPossible() throws Exception { |
| BooleanCondition nonReduced = BooleanCondition.not(NO_TRIVIAL_EVALUATION); |
| BooleanCondition reduced = BooleanCondition.not(NO_TRIVIAL_EVALUATION); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceComplexTreeToSingleValue() throws Exception { |
| // AND |
| // / \ |
| // OR NOT |
| // / \ \ |
| // NTE NTE TRUE |
| BooleanCondition nonReduced = |
| BooleanCondition.and( |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), |
| BooleanCondition.not(BooleanCondition.valueOf(true))); |
| BooleanCondition reduced = BooleanCondition.valueOf(false); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| |
| @Test |
| public void reduceComplexTreeToSmallerTree() throws Exception { |
| // AND |
| // / \ |
| // OR OR |
| // / \ / \ |
| // NTE NTE T F |
| BooleanCondition nonReduced = |
| BooleanCondition.and( |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), |
| BooleanCondition.or(BooleanCondition.valueOf(true), BooleanCondition.valueOf(false))); |
| BooleanCondition reduced = |
| BooleanCondition.and( |
| BooleanCondition.or(NO_TRIVIAL_EVALUATION, NO_TRIVIAL_EVALUATION), |
| BooleanCondition.valueOf(true)); |
| assertEquals(nonReduced.reduce(), reduced); |
| } |
| } |