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CharSequenceToObjectConverterTests.java
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CharSequenceToObjectConverterTests.java
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/*
* Copyright 2012-2021 the original author or authors.
*
* 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
*
* https://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 org.springframework.boot.convert;
import java.util.List;
import java.util.stream.Stream;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.provider.Arguments;
import org.springframework.core.convert.ConversionService;
import org.springframework.core.convert.TypeDescriptor;
import org.springframework.core.convert.converter.Converter;
import org.springframework.format.support.DefaultFormattingConversionService;
import org.springframework.format.support.FormattingConversionService;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link CharSequenceToObjectConverter}
*
* @author Phillip Webb
*/
class CharSequenceToObjectConverterTests {
@ConversionServiceTest
void convertWhenCanConvertViaToString(ConversionService conversionService) {
assertThat(conversionService.convert(new StringBuilder("1"), Integer.class)).isEqualTo(1);
}
@ConversionServiceTest
void convertWhenCanConvertDirectlySkipsStringConversion(ConversionService conversionService) {
assertThat(conversionService.convert(new String("1"), Long.class)).isEqualTo(1);
if (!ConversionServiceArguments.isApplicationConversionService(conversionService)) {
assertThat(conversionService.convert(new StringBuilder("1"), Long.class)).isEqualTo(2);
}
}
@Test
@SuppressWarnings("unchecked")
void convertWhenTargetIsList() {
ConversionService conversionService = new ApplicationConversionService();
StringBuilder source = new StringBuilder("1,2,3");
TypeDescriptor sourceType = TypeDescriptor.valueOf(StringBuilder.class);
TypeDescriptor targetType = TypeDescriptor.collection(List.class, TypeDescriptor.valueOf(String.class));
List<String> conveted = (List<String>) conversionService.convert(source, sourceType, targetType);
assertThat(conveted).containsExactly("1", "2", "3");
}
@Test
@SuppressWarnings("unchecked")
void convertWhenTargetIsListAndNotUsingApplicationConversionService() {
FormattingConversionService conversionService = new DefaultFormattingConversionService();
conversionService.addConverter(new CharSequenceToObjectConverter(conversionService));
StringBuilder source = new StringBuilder("1,2,3");
TypeDescriptor sourceType = TypeDescriptor.valueOf(StringBuilder.class);
TypeDescriptor targetType = TypeDescriptor.collection(List.class, TypeDescriptor.valueOf(String.class));
List<String> conveted = (List<String>) conversionService.convert(source, sourceType, targetType);
assertThat(conveted).containsExactly("1", "2", "3");
}
static Stream<? extends Arguments> conversionServices() {
return ConversionServiceArguments.with((conversionService) -> {
conversionService.addConverter(new StringToIntegerConverter());
conversionService.addConverter(new StringToLongConverter());
conversionService.addConverter(new CharSequenceToLongConverter());
conversionService.addConverter(new CharSequenceToObjectConverter(conversionService));
});
}
static class StringToIntegerConverter implements Converter<String, Integer> {
@Override
public Integer convert(String source) {
return Integer.valueOf(source);
}
}
static class StringToLongConverter implements Converter<String, Long> {
@Override
public Long convert(String source) {
return Long.valueOf(source);
}
}
static class CharSequenceToLongConverter implements Converter<CharSequence, Long> {
@Override
public Long convert(CharSequence source) {
return Long.valueOf(source.toString()) + 1;
}
}
}