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[FLINK-11753] [tests] Add hamcrest matchers for TypeSerializerSchemaC…
…ompatibility
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flink-core/src/test/java/org/apache/flink/api/common/typeutils/TypeSerializerMatchers.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
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| package org.apache.flink.api.common.typeutils; | ||
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| import org.hamcrest.CoreMatchers; | ||
| import org.hamcrest.Description; | ||
| import org.hamcrest.Matcher; | ||
| import org.hamcrest.TypeSafeDiagnosingMatcher; | ||
| import org.hamcrest.TypeSafeMatcher; | ||
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| import java.util.function.Predicate; | ||
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| import static org.apache.flink.util.Preconditions.checkNotNull; | ||
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| /** | ||
| * A Collection of useful {@link Matcher}s for {@link TypeSerializer} and {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public final class TypeSerializerMatchers { | ||
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| private TypeSerializerMatchers() { | ||
| } | ||
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| // ------------------------------------------------------------------------------------------------------------- | ||
| // Matcher Factories | ||
| // ------------------------------------------------------------------------------------------------------------- | ||
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| /** | ||
| * Matches {@code compatibleAsIs} {@link TypeSerializerSchemaCompatibility}. | ||
| * | ||
| * @param <T> element type | ||
| * @return a {@code Matcher} that matches {@code compatibleAsIs} {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> isCompatibleAsIs() { | ||
| return propertyMatcher(TypeSerializerSchemaCompatibility::isCompatibleAsIs, | ||
| "type serializer schema that is a compatible as is"); | ||
| } | ||
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| /** | ||
| * Matches {@code isIncompatible} {@link TypeSerializerSchemaCompatibility}. | ||
| * | ||
| * @param <T> element type | ||
| * @return a {@code Matcher} that matches {@code isIncompatible} {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> isIncompatible() { | ||
| return propertyMatcher(TypeSerializerSchemaCompatibility::isIncompatible, | ||
| "type serializer schema that is incompatible"); | ||
| } | ||
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| /** | ||
| * Matches {@code isCompatibleAfterMigration} {@link TypeSerializerSchemaCompatibility}. | ||
| * | ||
| * @param <T> element type | ||
| * @return a {@code Matcher} that matches {@code isCompatibleAfterMigration} {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> isCompatibleAfterMigration() { | ||
| return propertyMatcher(TypeSerializerSchemaCompatibility::isCompatibleAfterMigration, | ||
| "type serializer schema that is compatible after migration"); | ||
| } | ||
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| /** | ||
| * Matches {@code isCompatibleWithReconfiguredSerializer} {@link TypeSerializerSchemaCompatibility}. | ||
| * | ||
| * @param <T> element type | ||
| * @return a {@code Matcher} that matches {@code isCompatibleWithReconfiguredSerializer} {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> isCompatibleWithReconfiguredSerializer() { | ||
| @SuppressWarnings("unchecked") Matcher<TypeSerializer<T>> anything = | ||
| (Matcher<TypeSerializer<T>>) (Matcher<?>) CoreMatchers.anything(); | ||
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| return new CompatibleAfterReconfiguration<>(anything); | ||
| } | ||
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| /** | ||
| * Matches {@code isCompatibleWithReconfiguredSerializer} {@link TypeSerializerSchemaCompatibility}. | ||
| * | ||
| * @param reconfiguredSerializerMatcher matches the reconfigured serializer. | ||
| * @param <T> element type | ||
| * @return a {@code Matcher} that matches {@code isCompatibleWithReconfiguredSerializer} {@link TypeSerializerSchemaCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> isCompatibleWithReconfiguredSerializer( | ||
| Matcher<? extends TypeSerializer<T>> reconfiguredSerializerMatcher) { | ||
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| return new CompatibleAfterReconfiguration<>(reconfiguredSerializerMatcher); | ||
| } | ||
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| /** | ||
| * Matches if the expected {@code TypeSerializerSchemaCompatibility} has the same compatibility as {@code expectedCompatibility}. | ||
| * | ||
| * @param expectedCompatibility the compatibility to match to. | ||
| * @param <T> element type. | ||
| * @return a {@code Matcher} that matches if it has the same compatibility as {@code expectedCompatibility}. | ||
| */ | ||
| public static <T> Matcher<TypeSerializerSchemaCompatibility<T>> hasSameCompatibilityAs( | ||
| TypeSerializerSchemaCompatibility<T> expectedCompatibility) { | ||
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| return new SchemaCompatibilitySameAs<>(expectedCompatibility); | ||
| } | ||
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| // ------------------------------------------------------------------------------------------------------------- | ||
| // Helpers | ||
| // ------------------------------------------------------------------------------------------------------------- | ||
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| private static <T> Matcher<T> propertyMatcher(Predicate<T> predicate, String matcherDescription) { | ||
| return new TypeSafeMatcher<T>() { | ||
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| @Override | ||
| protected boolean matchesSafely(T item) { | ||
| return predicate.test(item); | ||
| } | ||
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| @Override | ||
| public void describeTo(Description description) { | ||
| description.appendText(matcherDescription); | ||
| } | ||
| }; | ||
| } | ||
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| // ------------------------------------------------------------------------------------------------------------- | ||
| // Matchers | ||
| // ------------------------------------------------------------------------------------------------------------- | ||
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| private static final class CompatibleAfterReconfiguration<T> | ||
| extends TypeSafeDiagnosingMatcher<TypeSerializerSchemaCompatibility<T>> { | ||
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| private final Matcher<? extends TypeSerializer<T>> reconfiguredSerializerMatcher; | ||
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| private CompatibleAfterReconfiguration(Matcher<? extends TypeSerializer<T>> reconfiguredSerializerMatcher) { | ||
| this.reconfiguredSerializerMatcher = checkNotNull(reconfiguredSerializerMatcher); | ||
| } | ||
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| @Override | ||
| protected boolean matchesSafely(TypeSerializerSchemaCompatibility<T> item, Description mismatchDescription) { | ||
| if (!item.isCompatibleWithReconfiguredSerializer()) { | ||
| mismatchDescription.appendText("serializer schema is not compatible with a reconfigured serializer"); | ||
| return false; | ||
| } | ||
| TypeSerializer<T> reconfiguredSerializer = item.getReconfiguredSerializer(); | ||
| if (!reconfiguredSerializerMatcher.matches(reconfiguredSerializer)) { | ||
| reconfiguredSerializerMatcher.describeMismatch(reconfiguredSerializer, mismatchDescription); | ||
| return false; | ||
| } | ||
| return true; | ||
| } | ||
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| @Override | ||
| public void describeTo(Description description) { | ||
| description.appendText("type serializer schema that is compatible after reconfiguration,") | ||
| .appendText("with a reconfigured serializer matching ") | ||
| .appendDescriptionOf(reconfiguredSerializerMatcher); | ||
| } | ||
| } | ||
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| private static class SchemaCompatibilitySameAs<T> extends TypeSafeMatcher<TypeSerializerSchemaCompatibility<T>> { | ||
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| private final TypeSerializerSchemaCompatibility<T> expectedCompatibility; | ||
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| private SchemaCompatibilitySameAs(TypeSerializerSchemaCompatibility<T> expectedCompatibility) { | ||
| this.expectedCompatibility = checkNotNull(expectedCompatibility); | ||
| } | ||
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| @Override | ||
| protected boolean matchesSafely(TypeSerializerSchemaCompatibility<T> testResultCompatibility) { | ||
| if (expectedCompatibility.isCompatibleAsIs()) { | ||
| return testResultCompatibility.isCompatibleAsIs(); | ||
| } | ||
| else if (expectedCompatibility.isIncompatible()) { | ||
| return testResultCompatibility.isIncompatible(); | ||
| } | ||
| else if (expectedCompatibility.isCompatibleAfterMigration()) { | ||
| return testResultCompatibility.isCompatibleAfterMigration(); | ||
| } | ||
| else if (expectedCompatibility.isCompatibleWithReconfiguredSerializer()) { | ||
| return testResultCompatibility.isCompatibleWithReconfiguredSerializer(); | ||
| } | ||
| return false; | ||
| } | ||
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| @Override | ||
| public void describeTo(Description description) { | ||
| description.appendText("same compatibility as ").appendValue(expectedCompatibility); | ||
| } | ||
| } | ||
| } |
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