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diff --git a/bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/ParserFailureTests.java b/bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/ParserFailureTests.java
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+++ b/bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/ParserFailureTests.java
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+/*******************************************************************************
+ *  Copyright (c) 2010 Association for Decentralized Information Management in
+ *  Industry THTH ry.
+ *  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:
+ *      VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.databoard.tests;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.simantics.databoard.parser.repository.DataTypeRepository;
+import org.simantics.databoard.parser.repository.DataTypeSyntaxError;
+
+public class ParserFailureTests {
+
+	DataTypeRepository repository;
+	
+	@Before
+	public void setUp() {
+		repository = new DataTypeRepository();
+	}	
+	
+	@Test(expected = DataTypeSyntaxError.class) 
+	public void testIncorrectUnion1() throws DataTypeSyntaxError {
+		repository.addDefinitions("type A = A | B");
+	}
+	
+	@Test(expected = DataTypeSyntaxError.class) 
+	public void testIncorrectUnion2() throws DataTypeSyntaxError {
+		repository.addDefinitions("type X = |Integer(range=0)");
+	}
+	
+	@Test(expected = DataTypeSyntaxError.class) 
+	public void testUndefinedReference() throws DataTypeSyntaxError {
+		repository.addDefinitions("type Foo = Bar");
+	}
+	
+	@Test(expected = DataTypeSyntaxError.class) 
+	public void testCircularDefinition() throws DataTypeSyntaxError {
+		repository.addDefinitions("type Foo = Bar " +
+				       "type Bar = Foo " 
+				      );
+	}
+	
+	@Test(expected = DataTypeSyntaxError.class) 
+	public void testInvalidAttribute() throws DataTypeSyntaxError {
+		repository.addDefinitions("type Foo = String(range=3)");
+	}
+}