flip_test.go

// 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 function

import (
	"fmt"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestFlip(t *testing.T) {

	x := Curry2(func(a, b string) string {
		return fmt.Sprintf("%s:%s", a, b)
	})

	assert.Equal(t, "a:b", x("a")("b"))

	y := Flip(x)

	assert.Equal(t, "b:a", y("a")("b"))
}