mirror of
https://github.com/IBM/fp-go.git
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100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
// Copyright (c) 2023 - 2025 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package readeroption
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import (
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"context"
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"testing"
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F "github.com/IBM/fp-go/v2/function"
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"github.com/IBM/fp-go/v2/internal/utils"
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O "github.com/IBM/fp-go/v2/option"
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"github.com/stretchr/testify/assert"
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)
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func getLastName(s utils.Initial) ReaderOption[context.Context, string] {
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return Of[context.Context]("Doe")
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}
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func getGivenName(s utils.WithLastName) ReaderOption[context.Context, string] {
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return Of[context.Context]("John")
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}
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func TestBind(t *testing.T) {
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res := F.Pipe3(
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Do[context.Context](utils.Empty),
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Bind(utils.SetLastName, getLastName),
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Bind(utils.SetGivenName, getGivenName),
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Map[context.Context](utils.GetFullName),
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)
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assert.Equal(t, res(context.Background()), O.Of("John Doe"))
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}
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func TestApS(t *testing.T) {
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res := F.Pipe3(
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Do[context.Context](utils.Empty),
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ApS(utils.SetLastName, Of[context.Context]("Doe")),
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ApS(utils.SetGivenName, Of[context.Context]("John")),
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Map[context.Context](utils.GetFullName),
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)
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assert.Equal(t, res(context.Background()), O.Of("John Doe"))
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}
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func TestLet(t *testing.T) {
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res := F.Pipe3(
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Do[context.Context](utils.Empty),
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Let[context.Context](utils.SetLastName, func(s utils.Initial) string {
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return "Doe"
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}),
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Let[context.Context](utils.SetGivenName, func(s utils.WithLastName) string {
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return "John"
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}),
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Map[context.Context](utils.GetFullName),
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)
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assert.Equal(t, res(context.Background()), O.Of("John Doe"))
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}
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func TestLetTo(t *testing.T) {
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res := F.Pipe3(
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Do[context.Context](utils.Empty),
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LetTo[context.Context](utils.SetLastName, "Doe"),
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LetTo[context.Context](utils.SetGivenName, "John"),
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Map[context.Context](utils.GetFullName),
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)
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assert.Equal(t, res(context.Background()), O.Of("John Doe"))
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}
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func TestBindTo(t *testing.T) {
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type State struct {
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Value int
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}
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res := F.Pipe1(
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Of[context.Context](42),
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BindTo[context.Context](func(v int) State {
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return State{Value: v}
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}),
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)
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assert.Equal(t, res(context.Background()), O.Of(State{Value: 42}))
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}
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