Package com.google.common.truth

@CheckReturnValue @NullMarked package com.google.common.truth

Truth is a library for performing assertions in tests:

 assertThat(notificationText).contains("testuser@google.com");
 

Truth is owned and maintained by the Guava team. It is used in the majority of the tests in Google’s own codebase.

For more information, see our introduction and other docs.

Class	Description
BigDecimalSubject	A subject for BigDecimal values.
BooleanSubject	A subject for Boolean values.
ClassSubject	A subject for Class values.
ComparableSubject<T extends Comparable<?>>	A subject for Comparable values.
Correspondence<A extends @Nullable Object, E extends @Nullable Object>	Determines whether an instance of type A corresponds in some way to an instance of type E for the purposes of a test assertion.
Correspondence.BinaryPredicate<A extends @Nullable Object, E extends @Nullable Object>	A functional interface for a binary predicate, to be used to test whether a pair of objects of types A and E satisfy some condition.
Correspondence.DiffFormatter<A extends @Nullable Object, E extends @Nullable Object>	A functional interface to be used format the diff between a pair of objects of types A and E.
CustomSubjectBuilder	In a fluent assertion chain, exposes one or more "custom" that methods, which accept a value under test and return a Subject.
CustomSubjectBuilder.Factory<CustomSubjectBuilderT extends CustomSubjectBuilder>	In a fluent assertion chain, the argument to the "custom" overload of about, the method that specifies what kind of Subject to create.
DoubleSubject	A subject for Double values.
DoubleSubject.TolerantDoubleComparison	A partially specified check about an approximate relationship to a double value using a tolerance.
Expect	A TestRule that batches up all failures encountered during a test, and reports them all together at the end (similar to ErrorCollector).
ExpectFailure	A utility for testing that assertions against a custom Subject fail when they should, plus a utility to assert about parts of the resulting failure messages.
ExpectFailure.SimpleSubjectBuilderCallback<S extends Subject, A>	A "functional interface" for expectFailureAbout() to invoke and capture failures.
ExpectFailure.StandardSubjectBuilderCallback	A "functional interface" for expectFailure() to invoke and capture failures.
Fact	A string key-value pair in a failure message, such as "expected: abc" or "but was: xyz."
FailureMetadata	An opaque, immutable object containing state from the previous calls in the fluent assertion chain.
FailureStrategy	Defines what to do when a check fails.
FloatSubject	A subject for Float values.
FloatSubject.TolerantFloatComparison	A partially specified check about an approximate relationship to a float value using a tolerance.
GuavaOptionalSubject	A subject for Guava Optional values.
IntegerSubject	A subject for Integer values.
IntegerSubject.TolerantIntegerComparison	A partially specified check about an approximate relationship to a int actual value using a tolerance.
IntStreamSubject	A subject for IntStream values.
IterableSubject	A subject for Iterable values.
IterableSubject.UsingCorrespondence<A extends @Nullable Object, E extends @Nullable Object>	A partially specified check in which the actual elements (normally the elements of the Iterable under test) are compared to expected elements using a Correspondence.
LongStreamSubject	A subject for LongStream values.
LongSubject	A subject for long values.
LongSubject.TolerantLongComparison	A partially specified check about an approximate relationship to a long value using a tolerance.
MapSubject	A subject for Map values.
MapSubject.UsingCorrespondence<A extends @Nullable Object, E extends @Nullable Object>	A partially specified check in which the actual values (i.e. the values of the Map under test) are compared to expected values using a Correspondence.
MultimapSubject	A subject for Multimap values.
MultimapSubject.UsingCorrespondence<A extends @Nullable Object, E extends @Nullable Object>	A partially specified check in which the actual values (i.e. the values of the Multimap under test) are compared to expected values using a Correspondence.
MultisetSubject	A subject for Multiset values.
ObjectArraySubject<T extends @Nullable Object>	A subject for Object[] and more generically T[].
OptionalDoubleSubject	A subject for OptionalDouble values.
OptionalIntSubject	A subject for OptionalInt values.
OptionalLongSubject	A subject for OptionalLong values.
OptionalSubject	A subject for Optional values.
Ordered	Returned by calls like IterableSubject.containsExactly(java.lang.Object...), Ordered lets the caller additionally check that the expected elements were present in the order they were passed to the previous calls.
PathSubject	Assertions for Path instances.
PrimitiveBooleanArraySubject	A subject for boolean[].
PrimitiveByteArraySubject	A subject for byte[].
PrimitiveCharArraySubject	A subject for char[].
PrimitiveDoubleArraySubject	A subject for double[].
PrimitiveDoubleArraySubject.DoubleArrayAsIterable	A partially specified check for doing assertions on the array similar to the assertions supported for Iterable values, in which the elements of the array under test are compared to expected elements using either exact or tolerant double equality: see PrimitiveDoubleArraySubject.usingExactEquality() and PrimitiveDoubleArraySubject.usingTolerance(double).
PrimitiveFloatArraySubject	A subject for float[].
PrimitiveFloatArraySubject.FloatArrayAsIterable	A partially specified check for doing assertions on the array similar to the assertions supported for Iterable values, in which the elements of the array under test are compared to expected elements using either exact or tolerant float equality: see PrimitiveFloatArraySubject.usingExactEquality() and PrimitiveFloatArraySubject.usingTolerance(double).
PrimitiveIntArraySubject	A subject for int[].
PrimitiveLongArraySubject	A subject for long[].
PrimitiveShortArraySubject	A subject for short[].
SimpleSubjectBuilder<SubjectT extends Subject, ActualT>	In a fluent assertion chain, exposes the most common that method, which accepts a value under test and returns a Subject.
StandardSubjectBuilder	In a fluent assertion chain, an object with which you can do any of the following: Set an optional message with StandardSubjectBuilder.withMessage(java.lang.String).
StreamSubject	A subject for Stream values.
StringSubject	A subject for String values.
StringSubject.CaseInsensitiveStringComparison	Offers case-insensitive checks for string values.
Subject	An object that lets you perform checks on the value under test.
Subject.Factory<SubjectT extends Subject, ActualT>	In a fluent assertion chain, the argument to the common overload of about, the method that specifies what kind of Subject to create.
TableSubject	A subject for Table values.
ThrowableSubject	A subject for Throwable values.
Truth	The primary entry point for Truth, a library for fluent test assertions.
Truth8	Deprecated. Instead of this class's methods, use the identical methods declared in the main Truth class.
TruthFailureSubject	Subject for AssertionError objects thrown by Truth.
TruthJUnit	Provides a way to use Truth to perform JUnit "assumptions."