caravan/troupe

package predicate_test

import (
    "testing"

    "github.com/caravan/troupe/actor"
    "github.com/caravan/troupe/handle/predicate"
    "github.com/stretchr/testify/assert"
)

type testStruct struct{}

func TestPredicated(t *testing.T) {
    as := assert.New(t)

    var res *testStruct
    h := predicate.Handler(
        predicate.IsA((*testStruct)(nil)),
        func(_ actor.Context, m actor.Message) bool {
            res = m.(*testStruct)
            return true
        },
    )

    h(nil, "hello")
    as.Nil(res)

    h(nil, &testStruct{})
    as.NotNil(res)
}