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/*
* Copyright 2000-2016 Vaadin Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.vaadin.data;
import java.util.Objects;
import org.junit.Assert;
import org.junit.Test;
/**
* @author Vaadin Ltd
*
*/
public class ValidatorTest {
@Test
public void alwaysPass() {
Validator<String> alwaysPass = Validator.alwaysPass();
Result<String> result = alwaysPass.apply("foo");
Assert.assertTrue(result instanceof SimpleResult);
SimpleResult<String> implRes = (SimpleResult<String>) result;
Assert.assertFalse(implRes.getMessage().isPresent());
}
@Test
public void chain_alwaysPassAndError() {
Validator<String> alwaysPass = Validator.alwaysPass();
Validator<String> chain = alwaysPass
.chain(value -> Result.error("foo"));
Result<String> result = chain.apply("bar");
Assert.assertTrue(result.isError());
Assert.assertEquals("foo", result.getMessage().get());
}
@SuppressWarnings("serial")
@Test
public void chain_mixture() {
Validator<String> first = new Validator<String>() {
@Override
public Result<String> apply(String value) {
if (value == null) {
return Result.error("Cannot be null");
}
return Result.ok(value);
}
};
Validator<String> second = new Validator<String>() {
@Override
public Result<String> apply(String value) {
if (value != null && value.isEmpty()) {
return Result.error("Cannot be empty");
}
return Result.ok(value);
}
};
Validator<String> chain = first.chain(second);
Result<String> result = chain.apply("bar");
Assert.assertFalse(result.isError());
result = chain.apply(null);
Assert.assertTrue(result.isError());
result = chain.apply("");
Assert.assertTrue(result.isError());
}
@Test
public void from() {
Validator<String> validator = Validator.from(Objects::nonNull,
"Cannot be null");
Result<String> result = validator.apply(null);
Assert.assertTrue(result.isError());
result = validator.apply("");
Assert.assertFalse(result.isError());
}
}
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