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Add tests for expressions listed on the docs

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octylFractal committed Oct 27, 2019
1 parent 777b132 commit 257988b14915ee05f6e331cd61e035cf5e6c656d
@@ -0,0 +1,100 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package com.sk89q.worldedit.internal.expression;

import com.sk89q.worldedit.LocalConfiguration;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.extension.platform.Platform;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

/**
* Common setup code for expression tests.
*/
class BaseExpressionTest {

static double readSlot(Expression expr, String name) {
return expr.getSlots().getSlotValue(name).orElseThrow(IllegalStateException::new);
}

private Platform mockPlat = mock(Platform.class);

@BeforeEach
void setup() {
when(mockPlat.getConfiguration()).thenReturn(new LocalConfiguration() {
@Override
public void load() {
}
});
WorldEdit.getInstance().getPlatformManager().register(mockPlat);
}

@AfterEach
void tearDown() {
WorldEdit.getInstance().getPlatformManager().unregister(mockPlat);
}

double simpleEval(String expressionString) throws ExpressionException {
final Expression expression = compile(expressionString);

expression.setEnvironment(new ExpressionEnvironment() {
@Override
public int getBlockType(double x, double y, double z) {
return (int) x;
}

@Override
public int getBlockData(double x, double y, double z) {
return (int) y;
}

@Override
public int getBlockTypeAbs(double x, double y, double z) {
return (int) x*10;
}

@Override
public int getBlockDataAbs(double x, double y, double z) {
return (int) y*10;
}

@Override
public int getBlockTypeRel(double x, double y, double z) {
return (int) x*100;
}

@Override
public int getBlockDataRel(double x, double y, double z) {
return (int) y*100;
}
});

return expression.evaluate();
}

Expression compile(String expressionString, String... variableNames) throws ExpressionException {
final Expression expression = Expression.compile(expressionString, variableNames);
expression.optimize();
return expression;
}
}
@@ -19,11 +19,6 @@

package com.sk89q.worldedit.internal.expression;

import com.sk89q.worldedit.LocalConfiguration;
import com.sk89q.worldedit.WorldEdit;
import com.sk89q.worldedit.extension.platform.Platform;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.time.Duration;
@@ -34,27 +29,8 @@
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTimeoutPreemptively;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class ExpressionTest {

private Platform mockPlat = mock(Platform.class);

@BeforeEach
public void setup() {
when(mockPlat.getConfiguration()).thenReturn(new LocalConfiguration() {
@Override
public void load() {
}
});
WorldEdit.getInstance().getPlatformManager().register(mockPlat);
}

@AfterEach
public void tearDown() {
WorldEdit.getInstance().getPlatformManager().unregister(mockPlat);
}
class ExpressionTest extends BaseExpressionTest {

@Test
public void testEvaluate() throws ExpressionException {
@@ -192,47 +168,4 @@ public void testTimeout() {
assertTrue(e.getMessage().contains("Calculations exceeded time limit"));
}

private double simpleEval(String expressionString) throws ExpressionException {
final Expression expression = compile(expressionString);

expression.setEnvironment(new ExpressionEnvironment() {
@Override
public int getBlockType(double x, double y, double z) {
return (int) x;
}

@Override
public int getBlockData(double x, double y, double z) {
return (int) y;
}

@Override
public int getBlockTypeAbs(double x, double y, double z) {
return (int) x*10;
}

@Override
public int getBlockDataAbs(double x, double y, double z) {
return (int) y*10;
}

@Override
public int getBlockTypeRel(double x, double y, double z) {
return (int) x*100;
}

@Override
public int getBlockDataRel(double x, double y, double z) {
return (int) y*100;
}
});

return expression.evaluate();
}

private Expression compile(String expressionString, String... variableNames) throws ExpressionException {
final Expression expression = Expression.compile(expressionString, variableNames);
expression.optimize();
return expression;
}
}
@@ -0,0 +1,171 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

package com.sk89q.worldedit.internal.expression;

import com.sk89q.worldedit.math.Vector3;
import org.junit.jupiter.api.Test;

import java.util.Arrays;
import java.util.function.Consumer;
import java.util.stream.Stream;

import static org.junit.jupiter.api.Assertions.assertEquals;

/**
* Test class for various real-world expressions.
*/
class RealExpressionTest extends BaseExpressionTest {

private static final class TestCase {

final Vector3 loc;
final double result;
final Consumer<Expression> postChecks;

private TestCase(Vector3 loc, double result, Consumer<Expression> postChecks) {
this.loc = loc;
this.result = result;
this.postChecks = postChecks;
}

TestCase withData(int expectedData) {
return new TestCase(loc, result, expr -> {
postChecks.accept(expr);
double data = readSlot(expr, "data");
assertEquals(expectedData, (int) data,
"Test case " + this + " failed (data)");
});
}

@Override
public String toString() {
return loc + " -> " + result;
}
}

private static TestCase testCase(Vector3 loc, double result) {
return testCase(loc, result, e -> {
});
}

private static TestCase testCase(Vector3 loc, double result, Consumer<Expression> postChecks) {
return new TestCase(loc, result, postChecks);
}

private void checkExpression(String expr, TestCase... cases) {
Expression compiled = compile(expr, "x", "y", "z");
for (TestCase aCase : cases) {
Vector3 loc = aCase.loc;
assertEquals(aCase.result, compiled.evaluate(loc.getX(), loc.getY(), loc.getZ()), 0,
"Test case " + aCase + " failed (result)");
aCase.postChecks.accept(compiled);
}
}

@Test
void torus() {
checkExpression("(0.75-sqrt(x^2+y^2))^2+z^2 < 0.25^2",
testCase(Vector3.at(0, 0, 0), 0),
testCase(Vector3.at(0.5, 0.5, 0.5), 0),
testCase(Vector3.at(1, 0, 0), 0),
testCase(Vector3.at(0.5, 0.5, 0), 1),
testCase(Vector3.at(0.75, 0.5, 0), 1),
testCase(Vector3.at(0.75, 0, 0), 1));
}

@Test
void gnarledOakTree() {
checkExpression("(0.5+sin(atan2(x,z)*8)*0.2)*(sqrt(x*x+z*z)/0.5)^(-2)-1.2 < y",
testCase(Vector3.at(-1, -1, -1), 1),
testCase(Vector3.at(-1, 0, 1), 1),
testCase(Vector3.at(1, 1, 1), 1),
testCase(Vector3.at(0, 0, -1), 1),
testCase(Vector3.at(0, 0, 0), 0),
testCase(Vector3.at(0, 1, 0), 0),
testCase(Vector3.at(0, 0, 0.32274), 0),
testCase(Vector3.at(0, 0, 0.32275), 1));
}

@Test
void rainbowTorus() {
checkExpression("data=(32+15/2/pi*atan2(x,y))%16; (0.75-sqrt(x^2+y^2))^2+z^2 < 0.25^2",
testCase(Vector3.at(0, 0, 0), 0),
testCase(Vector3.at(0.5, 0.5, 0.5), 0),
testCase(Vector3.at(1, 0, 0), 0),
testCase(Vector3.at(0.5, 0.5, 0), 1).withData(1),
testCase(Vector3.at(0.75, 0.5, 0), 1).withData(2),
testCase(Vector3.at(0.75, 0, 0), 1).withData(3));
}

@Test
void rainbowEgg() {
TestCase[] testCases = new TestCase[15];
for (int i = 0; i < testCases.length; i++) {
testCases[i] = testCase(Vector3.at(0, i / 16.0 - 0.5, 0), 1)
.withData((i + 9) % 16);
}
testCases = Stream.concat(Stream.of(testCases), Stream.of(
testCase(Vector3.at(0, 1, 0), 0)
)).toArray(TestCase[]::new);
checkExpression("data=(32+y*16+1)%16; y^2/9+x^2/6*(1/(1-0.4*y))+z^2/6*(1/(1-0.4*y))<0.08",
testCases);
}

@Test
void heart() {
checkExpression("(z/2)^2+x^2+(5*y/4-sqrt(abs(x)))^2<0.6",
testCase(Vector3.at(0, 0, -1), 1),
testCase(Vector3.at(0, 1, -1), 0),
testCase(Vector3.at(-0.5, 1, 0), 1));
}

@Test
void sineWave() {
checkExpression("sin(x*5)/2<y",
testCase(Vector3.at(1, -0.47947, 0), 0),
testCase(Vector3.at(1, -0.47946, 0), 1),
testCase(Vector3.at(2, -0.27202, 0), 0),
testCase(Vector3.at(2, -0.27201, 0), 1),
testCase(Vector3.at(3, 0.32513, 0), 0),
testCase(Vector3.at(3, 0.32515, 0), 1));
}

@Test
void radialCosine() {
checkExpression("cos(sqrt(x^2+z^2)*5)/2<y",
testCase(Vector3.at(0, 0.5, 0), 0),
testCase(Vector3.at(0, 0.51, 0), 1),
testCase(Vector3.at(Math.PI / 5, -0.5, 0), 0),
testCase(Vector3.at(Math.PI / 5, -0.49, 0), 1),
testCase(Vector3.at(Math.PI / 10, 0, 0), 0),
testCase(Vector3.at(Math.PI / 10, 0.1, 0), 1));
}

@Test
void circularHyperboloid() {
checkExpression("-(z^2/12)+(y^2/4)-(x^2/12)>-0.03",
testCase(Vector3.at(0, 0, 0), 1),
testCase(Vector3.at(0, 1, 0), 1),
testCase(Vector3.at(0, 1, 1), 1),
testCase(Vector3.at(1, 1, 1), 1),
testCase(Vector3.at(0, 0, 1), 0),
testCase(Vector3.at(1, 0, 1), 0));
}
}

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