Truth: Supported Types

Truth has built in support for the following types:

• Primitives

  • Boolean
  • Double
  • Float
  • Integer
  • Long

• Arrays

  • Object[]
  • boolean[]
  • byte[]
  • char[]
  • double[]
  • float[]
  • int[]
  • long[]
  • short[]

• Other JDK types

  • Object - since all types extend Object, you can make simple assertions such as .isEqualTo() on any type
  • String
  • Comparable - this can be used for any Comparable type (Instant, BigInteger, etc.)
  • Iterable - this can be used for any Iterable type (List, Set, etc.)
  • Optional - and OptionalInt, OptionalLong, and OptionalDouble
  • Stream - and IntStream, LongStream (and maybe someday DoubleStream)
  • Map
  • Throwable
  • Class
  • BigDecimal

• Guava types

  • Optional
  • Multimap
  • Multiset
  • Table

Truth is extensible, so if you don’t see a type you need to make assertions on in this list, you can write your own.