@webassemb.ly/utils v0.1.4

@webassemb.ly/utils

Utility methods used in webassemb.ly.

Methods

• invariant - check that an assertion is true or raise an error message.
• testy - create a declaration and test whether one or more assertions hold true.
• iterate - evaluate an iterator through a protocol for each yielded or returned value.

Types

This repository uses the Flow type system. The following types are exposed by the utils library.

• ReturnType - A generic type which will resolve the type returned by any function.
• ArgsType - A generic type which will resolve the arguments passed to any function.
• PromiseResolveType - A generic type which will resolve the value resolved by any promise.
• PromisesResolveType - A generic type which will resolve the values resolved by any array of promises (such as through Promise.all and Promise.race API methods ').

Types exported by testy

• DeclarationType - Defines the possible types for a testy declaration.
• AssertionType - Defines the posible types for each testy assertion.
• AssertionFactoryType - Defines the type for the testy assertion factory method.

Contributing

• One function per file.
• Use flow comment types
• Each file must have 100% flow coverage.
• Write unit tests
• Types must end with the word "Type"