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DatatypeTransformerTest.java
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DatatypeTransformerTest.java
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/**
* Copyright (C) 2020 Czech Technical University in Prague
* <p>
* This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
* version.
* <p>
* 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 General Public License for more
* details. You should have received a copy of the GNU General Public License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.utils;
import cz.cvut.kbss.jopa.environment.OWLClassA;
import cz.cvut.kbss.jopa.exception.UnsupportedTypeTransformation;
import org.junit.jupiter.api.Test;
import java.net.URL;
import static org.junit.jupiter.api.Assertions.*;
class DatatypeTransformerTest {
@Test
void transformReturnsNullForNullInput() {
assertNull(DatatypeTransformer.transform(null, String.class));
}
@Test
void transformConvertsValueToTargetType() {
final Integer value = 117;
final Double result = DatatypeTransformer.transform(value, Double.class);
assertEquals(value.doubleValue(), result, 0.01);
}
@Test
void transformThrowsUnsupportedTypeConversionWhenNoTransformerIsFound() {
final Integer value = 117;
final UnsupportedTypeTransformation ex = assertThrows(UnsupportedTypeTransformation.class,
() -> DatatypeTransformer.transform(value, URL.class));
assertEquals(String.format("Cannot transform value %s of type %s to target type %s.", value, Integer.class,
URL.class), ex.getMessage());
}
@Test
void transformToStringDoesNotRequireExplicitTransformer() {
final Integer value = 117;
final String result = DatatypeTransformer.transform(value, String.class);
assertEquals(value.toString(), result);
}
@Test
void transformCastsValueWithoutTransformerWhenValueIsAssignableToTargetType() {
final Integer value = 117;
final Number result = DatatypeTransformer.transform(value, Number.class);
assertSame(result, value);
}
@Test
void transformSupportsConversionUsingConstructorWithParameterMatchingTransformedValueType() {
final String value = "http://onto.fel.cvut.cz";
final URL result = DatatypeTransformer.transform(value, URL.class);
assertEquals(value, result.toString());
}
@Test
void transformThrowsUnsupportedTypeConversionWhenTargetTypeDoesNotHaveMatchingConstructor() {
final String value = "http://onto.fel.cvut.cz";
final UnsupportedTypeTransformation ex = assertThrows(UnsupportedTypeTransformation.class,
() -> DatatypeTransformer.transform(value, OWLClassA.class));
assertEquals(String.format("Cannot transform value %s of type %s to target type %s.", value, String.class,
OWLClassA.class), ex.getMessage());
}
}