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https://github.com/IBM/fp-go.git
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101 lines
3.0 KiB
Go
101 lines
3.0 KiB
Go
// Copyright (c) 2023 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 http
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import (
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"context"
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"fmt"
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"testing"
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HTTP "net/http"
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A "github.com/IBM/fp-go/array"
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R "github.com/IBM/fp-go/context/readerioeither"
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H "github.com/IBM/fp-go/context/readerioeither/http"
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E "github.com/IBM/fp-go/either"
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F "github.com/IBM/fp-go/function"
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IO "github.com/IBM/fp-go/io"
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T "github.com/IBM/fp-go/tuple"
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"github.com/stretchr/testify/assert"
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)
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type PostItem struct {
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UserId uint `json:"userId"`
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Id uint `json:"id"`
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Title string `json:"title"`
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Body string `json:"body"`
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}
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type CatFact struct {
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Fact string `json:"fact"`
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}
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func idxToUrl(idx int) string {
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return fmt.Sprintf("https://jsonplaceholder.typicode.com/posts/%d", idx+1)
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}
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// TestMultipleHttpRequests shows how to execute multiple HTTP requests in parallel assuming
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// that the response structure of all requests is identical, which is why we can use [R.TraverseArray]
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func TestMultipleHttpRequests(t *testing.T) {
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// prepare the http client
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client := H.MakeClient(HTTP.DefaultClient)
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// readSinglePost sends a GET request and parses the response as [PostItem]
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readSinglePost := H.ReadJson[PostItem](client)
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// total number of http requests
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count := 10
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data := F.Pipe3(
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A.MakeBy(count, idxToUrl),
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R.TraverseArray(F.Flow3(
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H.MakeGetRequest,
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readSinglePost,
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R.ChainFirstIOK(IO.Logf[PostItem]("Log Single: %v")),
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)),
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R.ChainFirstIOK(IO.Logf[[]PostItem]("Log Result: %v")),
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R.Map(A.Size[PostItem]),
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)
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result := data(context.Background())
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assert.Equal(t, E.Of[error](count), result())
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}
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// TestHeterogeneousHttpRequests shows how to execute multiple HTTP requests in parallel when
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// the response structure of these requests is different. We use [R.TraverseTuple2] to account for the different types
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func TestHeterogeneousHttpRequests(t *testing.T) {
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// prepare the http client
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client := H.MakeClient(HTTP.DefaultClient)
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// readSinglePost sends a GET request and parses the response as [PostItem]
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readSinglePost := H.ReadJson[PostItem](client)
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// readSingleCatFact sends a GET request and parses the response as [CatFact]
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readSingleCatFact := H.ReadJson[CatFact](client)
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data := F.Pipe3(
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T.MakeTuple2("https://jsonplaceholder.typicode.com/posts/1", "https://catfact.ninja/fact"),
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T.Map2(H.MakeGetRequest, H.MakeGetRequest),
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R.TraverseTuple2(
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readSinglePost,
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readSingleCatFact,
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),
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R.ChainFirstIOK(IO.Logf[T.Tuple2[PostItem, CatFact]]("Log Result: %v")),
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)
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result := data(context.Background())
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fmt.Println(result())
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}
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