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/*
* Copyright (c) 2016 Google, Inc.
*
* 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.google.common.truth;
import static com.google.common.truth.Truth.assertAbout;
import com.google.common.annotations.GwtIncompatible;
import com.google.j2objc.annotations.J2ObjCIncompatible;
import java.nio.file.Path;
import java.util.Optional;
import java.util.OptionalDouble;
import java.util.OptionalInt;
import java.util.OptionalLong;
import java.util.stream.IntStream;
import java.util.stream.LongStream;
import java.util.stream.Stream;
import org.checkerframework.checker.nullness.qual.Nullable;
/**
* The primary entry point for assertions about Java 8 types.
*
* <p>To use {@link Truth#assertWithMessage} with a Java 8 type, use {@code
* assertWithMessage(...).about(}{@link OptionalSubject#optionals optionals()}{@code ).that(...)}
* (or similarly for the other types).
*
* <p>Likewise, to use different failure strategies like {@link Expect}, use {@code
* expect.about(}{@link OptionalSubject#optionals optionals()}{@code ).that(...)}.
*
* <p>For more information about combining different messages, failure strategies, and subjects, see
* <a href="https://truth.dev/faq#full-chain">How do I specify a custom message/failure
* behavior/{@code Subject} type?</a> in the Truth FAQ.
*/
public final class Truth8 {
@SuppressWarnings("AssertAboutOptionals") // suggests infinite recursion
public static OptionalSubject assertThat(@Nullable Optional<?> target) {
return assertAbout(OptionalSubject.optionals()).that(target);
}
public static OptionalIntSubject assertThat(@Nullable OptionalInt target) {
return assertAbout(OptionalIntSubject.optionalInts()).that(target);
}
public static OptionalLongSubject assertThat(@Nullable OptionalLong target) {
return assertAbout(OptionalLongSubject.optionalLongs()).that(target);
}
public static OptionalDoubleSubject assertThat(@Nullable OptionalDouble target) {
return assertAbout(OptionalDoubleSubject.optionalDoubles()).that(target);
}
public static StreamSubject assertThat(@Nullable Stream<?> target) {
return assertAbout(StreamSubject.streams()).that(target);
}
public static IntStreamSubject assertThat(@Nullable IntStream target) {
return assertAbout(IntStreamSubject.intStreams()).that(target);
}
public static LongStreamSubject assertThat(@Nullable LongStream target) {
return assertAbout(LongStreamSubject.longStreams()).that(target);
}
// TODO(b/64757353): Add support for DoubleStream?
// Not actually a Java 8 feature, but for now this is the best option since core Truth still has
// to support Java environments without java.nio.file such as Android and J2CL.
@GwtIncompatible
@J2ObjCIncompatible
public static PathSubject assertThat(@Nullable Path target) {
return assertAbout(PathSubject.paths()).that(target);
}
private Truth8() {}
}
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