OptionalSubject (Truth HEAD-SNAPSHOT)

java.lang.Object
- com.google.common.truth.Subject
- - com.google.common.truth.OptionalSubject

```
public final class OptionalSubject
extends Subject
```
Propositions for Java 8 Optional subjects.

Since:

1.3.0 (previously part of truth-java8-extension)

Author:

Christian Gruber

Nested Class Summary
- Nested classes/interfaces inherited from class com.google.common.truth.Subject
  Subject.Factory<SubjectT extends Subject,ActualT>

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`void`	`hasValue(@Nullable Object expected)`	Fails if the `Optional<T>` does not have the given value or the subject is null.
`void`	`isEmpty()`	Fails if the `Optional<T>` is present or the subject is null.
`void`	`isPresent()`	Fails if the `Optional<T>` is empty or the subject is null.
`static Subject.Factory<OptionalSubject,Optional<?>>`	`optionals()`	Deprecated. Instead of `about(optionals()).that(...)`, use just `that(...)`.

Methods inherited from class com.google.common.truth.Subject
actualCustomStringRepresentation, check, equals, failWithActual, failWithActual, failWithoutActual, hashCode, ignoreCheck, isAnyOf, isEqualTo, isIn, isInstanceOf, isNoneOf, isNotEqualTo, isNotIn, isNotInstanceOf, isNotNull, isNotSameInstanceAs, isNull, isSameInstanceAs, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - isPresent
```
public void isPresent()
```
    Fails if the Optional<T> is empty or the subject is null.
  - isEmpty
```
public void isEmpty()
```
    Fails if the Optional<T> is present or the subject is null.
  - hasValue
```
public void hasValue(@Nullable Object expected)
```
    Fails if the Optional<T> does not have the given value or the subject is null.
    To make more complex assertions on the optional's value split your assertion in two:
    assertThat(myOptional).isPresent(); assertThat(myOptional.get()).contains("foo");
  - optionals
```
@Deprecated
public static Subject.Factory<OptionalSubject,Optional<?>> optionals()
```
    Deprecated.
    Instead of about(optionals()).that(...), use just that(...). Similarly, instead of assertAbout(optionals()).that(...), use just assertThat(...).
    
    Obsolete factory instance. This factory was previously necessary for assertions like assertWithMessage(...).about(paths()).that(path)..... Now, you can perform assertions like that without the about(...) call.