Exceptions

Every @api type across all five packages that implements Throwable.

Exception	Package	Extends	Summary
AmbiguousDefaultFactory	core	LogicException	Two registered default factories are equally close to the requested type.
BypassUnavailable	core	LogicException	bypassFinals() cannot do what was asked of it.
CannotWire	core	InvalidArgumentException	wire() cannot build the subject, or cannot decide what to pass it.
ConflictingExpectation	core	LogicException	A when() or expect() names a call another registration already specifies, and the two would…
ContextOwnershipViolation	core	LogicException	Configuration and verification belong to the context that created a double.
ForgottenDouble	core	LogicException	A double outlived the context that created it — almost always a double kept in a static property…
ForwardingTargetMismatch	core	InvalidArgumentException	The instance offered as a forwarding target does not satisfy what the double stands in for.
InvalidCallSpecification	core	LogicException	The closure handed to when()/verify()/calls() did not describe one call the way a specification…
InvalidDefaultValue	core	RuntimeException	A registered default factory produced a value the contract cannot hold.
MatcherLeaked	core	LogicException	A matcher reached a real call instead of a specification closure.
NeverMethodCalled	core	RuntimeException	A method declared : never was called without an expectation that throws.
NoDefaultValue	core	RuntimeException	A loose understudy had to answer a call, but the declared return type has no safe default.
NothingCaptured	core	LogicException	Captor::last() was read before any matched call carried a value through its capture() argument.
OriginalCallUnavailable	core	LogicException	callOriginal() was asked to delegate, and there is nothing to delegate to.
OriginalReturnTypeViolation	core	RuntimeException	A forwarded call returned an object the double cannot stand in for.
OutcomeUnavailable	core	LogicException	An invocation's outcome was read as the wrong kind: a returned value asked of a call that threw.
StrictModeViolation	core	RuntimeException	A strict understudy received a call no expectation matched.
UnderstudyError	core	—	Implemented by every exception this library throws, so a test can catch misuse of Understudy…
UnsupportedTarget	core	LogicException	The requested target cannot be doubled, and no option would make it work without the user changing…
VerificationFailed	core	RuntimeException	A verification about what the code under test did (or did not) do failed.