typescript-type-utils

This repo contains usefull typescript types, to be used across projects.

types

test-kit

the test kit types are utility types for ensuring the API signature of your code.
| types | description | | ------------- |-------------| | ExpectTrue<T> | fails the build if "T" is not true | | ExpectFalse<T> | fails the build if "T" is not false | | Equal<T1, T2> | equal to true if "T1" is identical to "T2" | | NotEqual<T1, T2> | equal to true if "T1" is not identical to "T2" | | VALID_ARGS<FUNC, ARGS_TUPPLE> | equal to true if "FUNC" can accept "ARGSTUPPLE" |
example usage:

type normalStrings = ExpectTrue<
    EQUAL<string, string>
>

tuple-utils

utility types for manipulating tuple types
| types | description | | ------------- |-------------| | TupleToUnion<T> | equal to a union of the items in the tuple | | ReduceTupleOn<T, ID_FIELD, VALUE_FIELD> | reduces the tuple to an object |

contribution

• no actual code files are allowed, only d.ts file
• the types are separated according to usage context and can be found in the lib directory
• all types must be tested, see examples in the test directory