testing

Documentation

Index

• func AssertComposition[HKTA, HKTB, HKTC, A, B, C any](t *testing.T, eq E.Eq[HKTC], fab func(HKTA, func(A) B) HKTB, ...) func(fa HKTA) bool
• func AssertIdentity[HKTA, A any](t *testing.T, eq E.Eq[HKTA], fmap func(HKTA, func(A) A) HKTA) func(fa HKTA) bool
• func AssertLaws[HKTA, HKTB, HKTC, A, B, C any](t *testing.T, eqa E.Eq[HKTA], eqc E.Eq[HKTC], faa func(HKTA, func(A) A) HKTA, ...) func(fa HKTA) bool

Functions

func AssertComposition

func AssertComposition[HKTA, HKTB, HKTC, A, B, C any](
	t *testing.T,

	eq E.Eq[HKTC],

	fab func(HKTA, func(A) B) HKTB,
	fac func(HKTA, func(A) C) HKTC,
	fbc func(HKTB, func(B) C) HKTC,
	ab func(A) B,
	bc func(B) C,
) func(fa HKTA) bool

Functor composition law

F.map(fa, a => bc(ab(a))) <-> F.map(F.map(fa, ab), bc)

func AssertIdentity

func AssertIdentity[HKTA, A any](t *testing.T, eq E.Eq[HKTA], fmap func(HKTA, func(A) A) HKTA) func(fa HKTA) bool

Functor identity law

F.map(fa, a => a) <-> fa

func AssertLaws

func AssertLaws[HKTA, HKTB, HKTC, A, B, C any](t *testing.T,
	eqa E.Eq[HKTA],
	eqc E.Eq[HKTC],

	faa func(HKTA, func(A) A) HKTA,
	fab func(HKTA, func(A) B) HKTB,
	fac func(HKTA, func(A) C) HKTC,
	fbc func(HKTB, func(B) C) HKTC,
	ab func(A) B,
	bc func(B) C,
) func(fa HKTA) bool

AssertLaws asserts the functor laws `identity` and `composition`