Module not testable (ModuleNotTestable)

Overview

Modules imported using @testable import must have been compiled using the -enable-testing compiler flag.

@testable import allows clients of a module to access internal API when writing tests. A @testable import will report an error if the imported module was not compiled with the -enable-testing compiler flag. Use of -enable-testing is recommended only in debug builds or other builds not intended for production use.

See Also

• @dynamicCallable implementation requirements (DynamicCallable)
• Add @preconcurrency import (AddPreconcurrencyImport)
• Always enabled availability domains (AlwaysAvailableDomain)
• Argument matching for trailing closures (TrailingClosureMatching)
• Calling a mutating async actor-isolated method (ActorIsolatedMutatingAsync)
• Calling an actor-isolated method from a synchronous nonisolated context (ActorIsolatedCall)
• Captures in a `@Sendable` closure (SendableClosureCaptures)
• Compilation caching (CompilationCaching)
• Conforming to `StringInterpolationProtocol` (StringInterpolationConformance)
• Conversion from `@isolated(any)` function type to synchronous function type (ConversionFromIsolatedAnyToSynchronous)
• Cross-isolation data race (RegionIsolationCrossIsolationDataRace)
• Deprecated declaration warnings (DeprecatedDeclaration)
• Deprecated implementation-only imports (ImplementationOnlyDeprecated)
• Dynamic exclusivity (DynamicExclusivity)
• Embedded Swift language restrictions (EmbeddedRestrictions)