81 lines
2.9 KiB
Java
81 lines
2.9 KiB
Java
/*
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* Copyright 2020 Adler Neves.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package br.ufes.inf.decisionelement;
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import br.ufes.inf.decisionelement.wheelreinventions.expressionparsing.MathExpressionException;
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import br.ufes.inf.decisionelement.wheelreinventions.expressionparsing.MathExpressionParser;
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import org.junit.After;
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import org.junit.Assert;
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import org.junit.Before;
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import org.junit.Test;
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/**
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* Tests MathExpression tree-ification capabilities.
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*/
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public class MathExpressionTreeificationTest {
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@Before
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public void setUp() {
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}
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@After
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public void tearDown() {
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}
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@Test
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public void basics() throws Exception {
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Assert.assertEquals(1, 1);
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parsesTo(" ( a + b ) - 1 ",
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"((a+b)-1.0)$");
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parsesTo("(.5*current_latency)-max_bandwidth/current_bandwidth$bandwidth",
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"((0.5*current_latency)-(max_bandwidth/current_bandwidth))$bandwidth");
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parsesTo("current_latency$bandwidth$latency",
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"current_latency$bandwidth$latency");
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parsesTo("-1+2/3*4",
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"((0.0-1.0)+(2.0/(3.0*4.0)))$");
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parsesTo("0-1+2/3*4",
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"((0.0-1.0)+(2.0/(3.0*4.0)))$");
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parsesTo("1-2/3*4",
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"(1.0-(2.0/(3.0*4.0)))$");
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parsesTo("0+1-2/3*4",
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"(0.0+(1.0-(2.0/(3.0*4.0))))$");
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simplifiesTo("0+1-24/3*4",
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"-1.0$");
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parsesTo("1 * (-2)",
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"(1.0*(0.0-2.0))$");
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simplifiesTo("1 * (-2)",
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"-2.0$");
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failsParsing("1 + -2");
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failsParsing("1 2");
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failsParsing("1a");
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failsParsing("+1");
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failsParsing("/1");
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failsParsing("*1");
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failsParsing("(1");
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failsParsing("1)");
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parsesTo("1",
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"1.0$");
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}
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void parsesTo(String expression, String expected) throws MathExpressionException {
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Assert.assertEquals(expected, MathExpressionParser.makeTree(expression).toString());
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}
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void simplifiesTo(String expression, String expected) throws MathExpressionException {
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Assert.assertEquals(expected, MathExpressionParser.makeTree(expression).getSimplified().toString());
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}
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void failsParsing(String expression) {
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try {
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MathExpressionParser.makeTree(expression);
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Assert.fail("Expression should have thrown MathExpressionException: " + expression);
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} catch (MathExpressionException e) {
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}
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}
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}
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