fp-go/v2/array/zip_test.go

// Copyright (c) 2023 - 2025 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 array

import (
	"fmt"
	"testing"

	T "github.com/IBM/fp-go/v2/tuple"
	"github.com/stretchr/testify/assert"
)

func TestZipWith(t *testing.T) {
	left := From(1, 2, 3)
	right := From("a", "b", "c", "d")

	res := ZipWith(left, right, func(l int, r string) string {
		return fmt.Sprintf("%s%d", r, l)
	})

	assert.Equal(t, From("a1", "b2", "c3"), res)
}

func TestZip(t *testing.T) {
	left := From(1, 2, 3)
	right := From("a", "b", "c", "d")

	res := Zip[string](left)(right)

	assert.Equal(t, From(T.MakeTuple2("a", 1), T.MakeTuple2("b", 2), T.MakeTuple2("c", 3)), res)
}

func TestUnzip(t *testing.T) {
	left := From(1, 2, 3)
	right := From("a", "b", "c")

	zipped := Zip[string](left)(right)

	unzipped := Unzip(zipped)

	assert.Equal(t, right, unzipped.F1)
	assert.Equal(t, left, unzipped.F2)
}