forked from spring-projects/spring-boot
/
NamedContributorsMapAdapterTests.java
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/
NamedContributorsMapAdapterTests.java
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/*
* Copyright 2012-2022 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.actuate.health;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.function.Function;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
/**
* Tests for {@link NamedContributorsMapAdapter}.
*
* @author Phillip Webb
*/
class NamedContributorsMapAdapterTests {
@Test
void createWhenMapIsNullThrowsException() {
assertThatIllegalArgumentException()
.isThrownBy(() -> new TestNamedContributorsMapAdapter<>(null, Function.identity()))
.withMessage("Map must not be null");
}
@Test
void createWhenValueAdapterIsNullThrowsException() {
assertThatIllegalArgumentException()
.isThrownBy(() -> new TestNamedContributorsMapAdapter<>(Collections.emptyMap(), null))
.withMessage("ValueAdapter must not be null");
}
@Test
void createWhenMapContainsNullValueThrowsException() {
assertThatIllegalArgumentException()
.isThrownBy(() -> new TestNamedContributorsMapAdapter<>(Collections.singletonMap("test", null),
Function.identity()))
.withMessage("Map must not contain null values");
}
@Test
void createWhenMapContainsNullKeyThrowsException() {
assertThatIllegalArgumentException()
.isThrownBy(() -> new TestNamedContributorsMapAdapter<>(Collections.singletonMap(null, "test"),
Function.identity()))
.withMessage("Map must not contain null keys");
}
@Test
void createWhenMapContainsKeyWithSlashThrowsException() {
assertThatIllegalArgumentException()
.isThrownBy(() -> new TestNamedContributorsMapAdapter<>(Collections.singletonMap("test/key", "test"),
Function.identity()))
.withMessage("Map keys must not contain a '/'");
}
@Test
void iterateReturnsAdaptedEntries() {
TestNamedContributorsMapAdapter<String> adapter = createAdapter();
Iterator<NamedContributor<String>> iterator = adapter.iterator();
NamedContributor<String> one = iterator.next();
NamedContributor<String> two = iterator.next();
assertThat(iterator.hasNext()).isFalse();
assertThat(one.getName()).isEqualTo("one");
assertThat(one.getContributor()).isEqualTo("eno");
assertThat(two.getName()).isEqualTo("two");
assertThat(two.getContributor()).isEqualTo("owt");
}
@Test
void getContributorReturnsAdaptedEntry() {
TestNamedContributorsMapAdapter<String> adapter = createAdapter();
assertThat(adapter.getContributor("one")).isEqualTo("eno");
assertThat(adapter.getContributor("two")).isEqualTo("owt");
}
@Test
void eachValueAdapterShouldBeCalledOnlyOnce() {
Map<String, String> map = new LinkedHashMap<>();
map.put("one", "one");
map.put("two", "two");
int callCount = map.size();
AtomicInteger counter = new AtomicInteger(0);
TestNamedContributorsMapAdapter<String> adapter = new TestNamedContributorsMapAdapter<>(map,
(name) -> count(name, counter));
assertThat(adapter.getContributor("one")).isEqualTo("eno");
assertThat(counter.get()).isEqualTo(callCount);
assertThat(adapter.getContributor("two")).isEqualTo("owt");
assertThat(counter.get()).isEqualTo(callCount);
}
@Test
void getContributorWhenNotInMapReturnsNull() {
TestNamedContributorsMapAdapter<String> adapter = createAdapter();
assertThat(adapter.getContributor("missing")).isNull();
}
private TestNamedContributorsMapAdapter<String> createAdapter() {
Map<String, String> map = new LinkedHashMap<>();
map.put("one", "one");
map.put("two", "two");
TestNamedContributorsMapAdapter<String> adapter = new TestNamedContributorsMapAdapter<>(map, this::reverse);
return adapter;
}
private String count(CharSequence charSequence, AtomicInteger counter) {
counter.incrementAndGet();
return reverse(charSequence);
}
private String reverse(CharSequence charSequence) {
return new StringBuilder(charSequence).reverse().toString();
}
static class TestNamedContributorsMapAdapter<V> extends NamedContributorsMapAdapter<V, String> {
TestNamedContributorsMapAdapter(Map<String, V> map, Function<V, ? extends String> valueAdapter) {
super(map, valueAdapter);
}
}
}