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EnumValueValidatorTest.java
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EnumValueValidatorTest.java
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/*
* Copyright (c) 2021 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.base.model.headers;
import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
import static org.assertj.core.api.Assertions.assertThatNoException;
import static org.assertj.core.api.Assertions.assertThatNullPointerException;
import static org.assertj.core.api.Assertions.assertThatThrownBy;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertInstancesOf;
import static org.mutabilitydetector.unittesting.MutabilityMatchers.areImmutable;
import org.eclipse.ditto.base.model.exceptions.DittoHeaderInvalidException;
import org.junit.Test;
/**
* Unit tests for {@link EnumValueValidator}.
*/
public final class EnumValueValidatorTest {
private static final EnumValueValidator underTest = EnumValueValidator.getInstance(FancyTestEnum.values());
private static final DittoHeaderDefinition KNOWN_HEADER_DEFINITION =
DittoHeaderDefinition.LIVE_CHANNEL_TIMEOUT_STRATEGY;
@Test
public void assertImmutability() {
assertInstancesOf(EnumValueValidator.class, areImmutable());
}
@Test
public void tryToAcceptNullDefinition() {
assertThatNullPointerException()
.isThrownBy(() -> underTest.accept(null, FancyTestEnum.BAZ_BAR.s))
.withMessage("The definition must not be null!")
.withNoCause();
}
@Test
public void tryToInitializeWithNullEnumValues() {
assertThatNullPointerException()
.isThrownBy(() -> EnumValueValidator.getInstance(null))
.withMessage("The enumValues must not be null!")
.withNoCause();
}
@Test
public void tryToInitializeWithEmptyEnumValues() {
assertThatIllegalArgumentException()
.isThrownBy(() -> EnumValueValidator.getInstance(new Enum<?>[] {}))
.withMessage("The enumValues must not be empty!")
.withNoCause();
}
@Test
public void ensureValidEnumValuesDoNotThrowException() {
assertThatNoException()
.isThrownBy(() ->
underTest.validateValue(KNOWN_HEADER_DEFINITION, "foo")
);
assertThatNoException()
.isThrownBy(() ->
underTest.validateValue(KNOWN_HEADER_DEFINITION, FancyTestEnum.BAZ_BAR.s)
);
}
@Test
public void invalidEnumValuesThrowException() {
assertThatThrownBy(() ->
underTest.validateValue(KNOWN_HEADER_DEFINITION, "what")
)
.isInstanceOf(DittoHeaderInvalidException.class)
.hasMessage("The value 'what' of the header 'live-channel-timeout-strategy' is not a valid enum value of " +
"type 'FancyTestEnum'.")
.matches(ex -> ((DittoHeaderInvalidException) ex).getDescription()
.filter(desc -> desc.equals("The value must be one of: <foo|bar|baz-bar>."))
.isPresent(), "Contains the expected description");
}
enum FancyTestEnum {
FOO("foo"),
BAR("bar"),
BAZ_BAR("baz-bar");
private final String s;
FancyTestEnum(final String s) {
this.s = s;
}
@Override
public String toString() {
return s;
}
}
}