Test helpers

@pencroff-lab/kore / test

Assertion helpers for result tuples, published as @pencroff-lab/kore/test.

Both helpers narrow a ResultTuple to one branch and return its payload, so a test asserts on a value instead of guarding and casting. Failure is a plain thrown Error: this module imports no test framework and adds no runtime dependency, so it works in any runner.

See

test.examples.test.ts for usage patterns

Functions

expectErr()

expectErr<T>(tuple): Err

Defined in: flow/test.ts:48

Assert the tuple failed and return its error.

Type Parameters

T

T

Parameters

tuple

ResultTuple <T>

Result to unwrap

Returns

Err

The Err

Throws

Error if the tuple holds a success value

expectOk()

expectOk<T>(tuple): T

Defined in: flow/test.ts:34

Assert the tuple succeeded and return its value.

Type Parameters

T

T

Parameters

tuple

ResultTuple <T>

Result to unwrap

Returns

T

The success value

Throws

Error if the tuple holds an error