Creates a named requirement that includes configuration.

Creates a new named requirement without configuration.

A configured requirement contains the requirement, a configuration object, and the name to give that configured object.

Descriptor describes a component of the testing framework.

Defaults provides default component Descriptors for components.

Factory for new component instances.

Instance of a testing framework component.

Repository of components.

RequirementError is an error that occurred while requiring components.

Resolver for component requirements.

Configuration is a marker interface for configuration objects that components take.

ID for a component of the testing framework.

Requirement is a marker interface for an element that can be required of the testing framework.

Variant allows an environment to support multiple components with the same ID.