// Copyright (c) 2023 IBM Corp.
// All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package stateless

import (
	"testing"

	O "github.com/IBM/fp-go/option"
	"github.com/stretchr/testify/assert"
)

func TestFirst(t *testing.T) {

	seq := From(1, 2, 3)

	fst := First(seq)

	assert.Equal(t, O.Of(1), fst)
}

func TestNoFirst(t *testing.T) {

	seq := Empty[int]()

	fst := First(seq)

	assert.Equal(t, O.None[int](), fst)
}