LinearGradientValidatorTestCase.java

/*******************************************************************************
 * Copyright (c) 2011 BestSolution.at and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Tom Schindl<tom.schindl@bestsolution.at> - initial API and implementation
 *******************************************************************************/
package at.bestsolution.efxclipse.tooling.css.jfx.test.validators;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import junit.framework.TestCase;

import at.bestsolution.efxclipse.tooling.css.CssDialectExtension.ValidationResult;
import at.bestsolution.efxclipse.tooling.css.cssDsl.CssDslFactory;
import at.bestsolution.efxclipse.tooling.css.cssDsl.CssDslPackage;
import at.bestsolution.efxclipse.tooling.css.cssDsl.expr;
import at.bestsolution.efxclipse.tooling.css.cssDsl.function;
import at.bestsolution.efxclipse.tooling.css.cssDsl.term;
import at.bestsolution.efxclipse.tooling.css.cssDsl.termGroup;
import at.bestsolution.efxclipse.tooling.css.jfx.JFXDialectExtension;
import at.bestsolution.efxclipse.tooling.css.jfx.validators.LinearGradientValidator;

/**
 * @author Tom Schindl
 *
 */
public class LinearGradientValidatorTestCase extends TestCase {
	public void test_validateLinearGradient_ColorStopOnly() {

		// red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("red");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100%");

			termGroup group = CssDslFactory.eINSTANCE.createtermGroup();
			group.getTerms().addAll(Arrays.asList(t1, t2));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(group);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}

		// red 0%, blue 50%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("red");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("0%");

			termGroup colorStop1 = CssDslFactory.eINSTANCE.createtermGroup();
			colorStop1.getTerms().addAll(Arrays.asList(t1, t2));

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setIdentifier("blue");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setNumber("100%");

			termGroup colorStop2 = CssDslFactory.eINSTANCE.createtermGroup();
			colorStop2.getTerms().addAll(Arrays.asList(t3, t4));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(colorStop1);
			expr.getTermGroups().add(colorStop2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}
		
		// black 60%, #141414 60.1%, black 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("black");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("60%");

			termGroup colorStop1 = CssDslFactory.eINSTANCE.createtermGroup();
			colorStop1.getTerms().addAll(Arrays.asList(t1, t2));

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setHexColor("#141414");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setNumber("60.1%");

			termGroup colorStop2 = CssDslFactory.eINSTANCE.createtermGroup();
			colorStop2.getTerms().addAll(Arrays.asList(t3, t4));
			
			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setIdentifier("black");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("100%");

			termGroup colorStop3 = CssDslFactory.eINSTANCE.createtermGroup();
			colorStop3.getTerms().addAll(Arrays.asList(t5, t6));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(colorStop1);
			expr.getTermGroups().add(colorStop2);
			expr.getTermGroups().add(colorStop3);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}
		
		
		// red 10 ("px","mm","cm","in","pt","pc","em","ex")
		for (String length : JFXDialectExtension.sizeUnits()) {
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("red");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("10" + length);

			termGroup group = CssDslFactory.eINSTANCE.createtermGroup();
			group.getTerms().addAll(Arrays.asList(t1, t2));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(group);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}
		
		// red 101% == Invalid
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("red");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("101%");

			termGroup group = CssDslFactory.eINSTANCE.createtermGroup();
			group.getTerms().addAll(Arrays.asList(t1, t2));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(group);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(1, results.size());
			assertEquals(t2, results.get(0).object);
			assertEquals(CssDslPackage.Literals.TERM__NUMBER,
					results.get(0).feature);
		}

		// red 101%, red -1% == Invalid
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("red");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("101%");

			termGroup group1 = CssDslFactory.eINSTANCE.createtermGroup();
			group1.getTerms().addAll(Arrays.asList(t1, t2));

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setIdentifier("red");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setNumber("-1%");

			termGroup group2 = CssDslFactory.eINSTANCE.createtermGroup();
			group2.getTerms().addAll(Arrays.asList(t3, t4));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().addAll(Arrays.asList(group1, group2));

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(2, results.size());
			assertEquals(t2, results.get(0).object);
			assertEquals(CssDslPackage.Literals.TERM__NUMBER,
					results.get(0).feature);
			assertEquals(t4, results.get(1).object);
			assertEquals(CssDslPackage.Literals.TERM__NUMBER,
					results.get(1).feature);
		}
	}

	public void test_validateLinearGradient_FromTo() {
		// from 100px 100px to 200px 200px, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("100%");

			termGroup stopGroup = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup.getTerms().addAll(Arrays.asList(t7, t8));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(stopGroup);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}

		// from 100px 100px to 200px 200px, red 0%, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("0%");

			termGroup stopGroup1 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup1.getTerms().addAll(Arrays.asList(t7, t8));

			term t9 = CssDslFactory.eINSTANCE.createterm();
			t9.setIdentifier("red");

			term t10 = CssDslFactory.eINSTANCE.createterm();
			t10.setNumber("100%");

			termGroup stopGroup2 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup2.getTerms().addAll(Arrays.asList(t9, t10));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(stopGroup1);
			expr.getTermGroups().add(stopGroup2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}

		// from 100px 100px to 200px 200px, repeat, red 0%, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term repeatTerm = CssDslFactory.eINSTANCE.createterm();
			repeatTerm.setIdentifier("repeat");

			termGroup repeatGroup = CssDslFactory.eINSTANCE.createtermGroup();
			repeatGroup.getTerms().add(repeatTerm);

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("0%");

			termGroup stopGroup1 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup1.getTerms().addAll(Arrays.asList(t7, t8));

			term t9 = CssDslFactory.eINSTANCE.createterm();
			t9.setIdentifier("red");

			term t10 = CssDslFactory.eINSTANCE.createterm();
			t10.setNumber("100%");

			termGroup stopGroup2 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup2.getTerms().addAll(Arrays.asList(t9, t10));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(repeatGroup);
			expr.getTermGroups().add(stopGroup1);
			expr.getTermGroups().add(stopGroup2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(results.toString(), 0, results.size());
		}

		// from 100px 100px to 200px 200px, reflect, red 0%, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term repeatTerm = CssDslFactory.eINSTANCE.createterm();
			repeatTerm.setIdentifier("reflect");

			termGroup repeatGroup = CssDslFactory.eINSTANCE.createtermGroup();
			repeatGroup.getTerms().add(repeatTerm);

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("0%");

			termGroup stopGroup1 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup1.getTerms().addAll(Arrays.asList(t7, t8));

			term t9 = CssDslFactory.eINSTANCE.createterm();
			t9.setIdentifier("red");

			term t10 = CssDslFactory.eINSTANCE.createterm();
			t10.setNumber("100%");

			termGroup stopGroup2 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup2.getTerms().addAll(Arrays.asList(t9, t10));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(repeatGroup);
			expr.getTermGroups().add(stopGroup1);
			expr.getTermGroups().add(stopGroup2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(results.toString(), 0, results.size());
		}

		// from 100px 100px to 200px 200px, unknown, red 0%, red 100% == Invalid
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term repeatTerm = CssDslFactory.eINSTANCE.createterm();
			repeatTerm.setIdentifier("unknown");

			termGroup repeatGroup = CssDslFactory.eINSTANCE.createtermGroup();
			repeatGroup.getTerms().add(repeatTerm);

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("0%");

			termGroup stopGroup1 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup1.getTerms().addAll(Arrays.asList(t7, t8));

			term t9 = CssDslFactory.eINSTANCE.createterm();
			t9.setIdentifier("red");

			term t10 = CssDslFactory.eINSTANCE.createterm();
			t10.setNumber("100%");

			termGroup stopGroup2 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup2.getTerms().addAll(Arrays.asList(t9, t10));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(repeatGroup);
			expr.getTermGroups().add(stopGroup1);
			expr.getTermGroups().add(stopGroup2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(results.toString(), 1, results.size());
			assertEquals(repeatTerm, results.get(0).object);
			assertEquals(CssDslPackage.Literals.TERM__IDENTIFIER,
					results.get(0).feature);
		}

		// from 100px 100px to 200px 200px
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(results.toString(), 1, results.size());
			assertEquals(function, results.get(0).object);
			assertEquals(CssDslPackage.Literals.FUNCTION__EXPRESSION,
					results.get(0).feature);
		}

		// from 100px 100px to 200px, red 0%, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms().addAll(Arrays.asList(t1, t2, t3, t4, t5));

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			term t8 = CssDslFactory.eINSTANCE.createterm();
			t8.setNumber("0%");

			termGroup stopGroup1 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup1.getTerms().addAll(Arrays.asList(t7, t8));

			term t9 = CssDslFactory.eINSTANCE.createterm();
			t9.setIdentifier("red");

			term t10 = CssDslFactory.eINSTANCE.createterm();
			t10.setNumber("100%");

			termGroup stopGroup2 = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup2.getTerms().addAll(Arrays.asList(t9, t10));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(stopGroup1);
			expr.getTermGroups().add(stopGroup2);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(1, results.size());
			assertEquals(fromToGroup, results.get(0).object);
			assertNull(results.get(0).feature);
		}

		// from 100px 100px to 200px 200px, red
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("from");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setNumber("100px");

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setNumber("100px");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setIdentifier("to");

			term t5 = CssDslFactory.eINSTANCE.createterm();
			t5.setNumber("200px");

			term t6 = CssDslFactory.eINSTANCE.createterm();
			t6.setNumber("200px");

			termGroup fromToGroup = CssDslFactory.eINSTANCE.createtermGroup();
			fromToGroup.getTerms()
					.addAll(Arrays.asList(t1, t2, t3, t4, t5, t6));

			term t7 = CssDslFactory.eINSTANCE.createterm();
			t7.setIdentifier("red");

			termGroup stopGroup = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup.getTerms().addAll(Arrays.asList(t7));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(fromToGroup);
			expr.getTermGroups().add(stopGroup);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}
	}

	public void test_validateLinearGradient_To() {
		// to bottom, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("to");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setIdentifier("bottom");

			termGroup toGroup = CssDslFactory.eINSTANCE.createtermGroup();
			toGroup.getTerms().addAll(Arrays.asList(t1, t2));

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setIdentifier("red");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setNumber("0%");

			termGroup stopGroup = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup.getTerms().addAll(Arrays.asList(t3, t4));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(toGroup);
			expr.getTermGroups().add(stopGroup);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}

		// to left, red 100%
		{
			term t1 = CssDslFactory.eINSTANCE.createterm();
			t1.setIdentifier("to");

			term t2 = CssDslFactory.eINSTANCE.createterm();
			t2.setIdentifier("left");

			termGroup toGroup = CssDslFactory.eINSTANCE.createtermGroup();
			toGroup.getTerms().addAll(Arrays.asList(t1, t2));

			term t3 = CssDslFactory.eINSTANCE.createterm();
			t3.setIdentifier("red");

			term t4 = CssDslFactory.eINSTANCE.createterm();
			t4.setNumber("0%");

			termGroup stopGroup = CssDslFactory.eINSTANCE.createtermGroup();
			stopGroup.getTerms().addAll(Arrays.asList(t3, t4));

			expr expr = CssDslFactory.eINSTANCE.createexpr();
			expr.getTermGroups().add(toGroup);
			expr.getTermGroups().add(stopGroup);

			function function = CssDslFactory.eINSTANCE.createfunction();
			function.setName("linear-gradient");
			function.setExpression(expr);

			term term = CssDslFactory.eINSTANCE.createterm();
			term.setFunction(function);

			List<ValidationResult> results = new ArrayList<ValidationResult>();
			LinearGradientValidator.validateLinearGradient(function, results);
			assertEquals(0, results.size());
		}
	}
}