ParserTest.java

package org.geogebra.commands;

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;

import java.util.Locale;

import org.geogebra.common.kernel.StringTemplate;
import org.geogebra.common.kernel.arithmetic.ValidExpression;
import org.geogebra.common.kernel.commands.AlgebraProcessor;
import org.geogebra.common.kernel.parser.ParseException;
import org.geogebra.common.util.debug.Log;
import org.geogebra.common.util.lang.Unicode;
import org.geogebra.desktop.main.AppDNoGui;
import org.geogebra.desktop.main.LocalizationD;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

public class ParserTest {
	static AppDNoGui app;
	static AlgebraProcessor ap;

	@BeforeClass
	public static void setupCas() {
		app = new AppDNoGui(new LocalizationD(3), true);
		app.setLanguage(Locale.US);
	}
	
	@Test
	public void testBrackets(){
		try {
			
			long l = System.currentTimeMillis();
			app.getKernel().getParser().
parseGeoGebraExpression(
							"{{{{{{{{{{{{{{{{{{{{{{{}}}}}}}}}}}}}}}}}}}}}}}");
			app.getKernel().getParser().
			parseGeoGebraExpression("(((((((((((((((((((((((1)))))))))))))))))))))))");
			app.getKernel().getParser().
			parseGeoGebraExpression("If[x>1,If[x>2,If[x>3,If[x>4,If[x>1,If[x>2,If[x>3,If[x>4,If[x>1,If[x>2,If[x>3,If[x>4,If[x>1,If[x>2,If[x>3,If[x>4,If[x>1,If[x>2,If[x>3,If[x>4,If[x>1,If[x>2,If[x>3,If[x>4,42" +
					"]]]]]]]]]]]]]]]]]]]]]]]]");
			l = System.currentTimeMillis() -l;
			Log.debug("TIME" + l);
			assertTrue("Too long:" + l, l < 400);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	@Test
	public void testExceptions() {
		shouldBeExcption("1.2.3", "MyError");
		shouldBeExcption("1+", "ParseException");
		shouldBeExcption("-", "ParseException");
		shouldBeExcption("(", "BracketsError");
		shouldBeExcption("{-", "BracketsError");
	}

	@Test
	public void testPriority() {
		checkSameStructure("x(x+1)^2", "x*(x+1)^2");
		checkSameStructure(Unicode.SQUARE_ROOT + "x(x+1)", "sqrt(x)*(x+1)");
		checkSameStructure("x(x+1)!", "x*(x+1)!");
		checkSameStructure("cos^2(x)", "cos(x)^2");
		checkSameStructure("sin" + Unicode.Superscript_2 + "(x)", "sin(x)^2");

	}

	@Test
	public void testSpecialVectors() {
		checkSameStructure("A(1|2)", "(1,2)");
		checkSameStructure("A(1|2|3)", "(1,2,3)");
		checkSameStructure("A(1;pi/2)", "(1;pi/2)");

	}

	private void checkSameStructure(String string, String string2) {
		Throwable p = null;
		try {
			ValidExpression v1 = app.getKernel().getParser()
					.parseGeoGebraExpression(string);
			ValidExpression v2 = app.getKernel().getParser()
					.parseGeoGebraExpression(string);
			Assert.assertEquals(v1.toString(StringTemplate.maxPrecision),
					v2.toString(StringTemplate.maxPrecision));
		} catch (Throwable e) {
			p = e;
		}
		assertNull(p);

	}

	private void shouldBeExcption(String string, String exceptionClass) {
		Throwable p = null;
		try{
			app.getKernel().getParser().
			parseGeoGebraExpression(string);
		} catch (Throwable e) {
			p = e;
		}
		Assert.assertEquals(exceptionClass, p.getClass().getSimpleName());
	}

	/**
	 *  
	 */
	@Test
	public void testInvalid() {
		long l = System.currentTimeMillis();
		try {


			app.getKernel().getParser().parseGeoGebraExpression(
					"x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/(x/()))))))))))))))))))))");

		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		l = System.currentTimeMillis() - l;
		Log.debug("TIME" + l);
		assertTrue("Too long:" + l, l < 4000);
	}
	
	/**
	 * Test for || brackets
	 */
	@Test
	public void testAbsValue(){

			try {
				app.getKernel().getParser().
				parseGeoGebraExpression("|1|");
				app.getKernel().getParser().
				parseGeoGebraExpression("(1|1|1)");
				app.getKernel().getParser().
				parseGeoGebraExpression("(a||b)");
			} catch (ParseException e) {
				assertNull(e);
			}
			try {
				app.getKernel().getParser().
				parseGeoGebraExpression("|1|2|3|");
			} catch (ParseException e) {
				assertNotNull(e);
			}
			

	}
}