package script

import (
	"context"
	"slices"
	"testing"
)

func TestChain(t *testing.T) {
	p := func(_ context.Context, in []string) ([]string, error) {
		in[0] = in[0] + in[0]
		return in, nil
	}

	chain := Chain(p, p, p)

	in := []string{"a"}
	want := []string{"aaaaaaaa"}

	res, err := chain(t.Context(), in)
	if err != nil {
		t.Fatal(err)
	}

	if !slices.Equal(res, want) {
		t.Fatalf("slices are not equal, have: %+v, want: %+v", res, want)
	}
}