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84 lines
2.3 KiB
84 lines
2.3 KiB
8 years ago
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/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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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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*/
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package cmd
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"testing"
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"time"
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)
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// This test sets globalMaxConn to 1 and starts 6 connections in
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// parallel on a server with the rate limit handler configured. This
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// should allow one request to execute at a time, and at most 4 to
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// wait to execute and the 6th request should get a 429 status code
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// error.
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func TestRateLimitHandler(t *testing.T) {
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// save the global Max connections
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saveGlobalMaxConn := globalMaxConn
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globalMaxConn = 1
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testHandler := func(w http.ResponseWriter, r *http.Request) {
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time.Sleep(100 * time.Millisecond)
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fmt.Fprintln(w, "Hello client!")
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}
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rlh := setRateLimitHandler(http.HandlerFunc(testHandler))
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ts := httptest.NewServer(rlh)
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respCh := make(chan int)
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startTime := time.Now()
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for i := 0; i < 6; i++ {
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go func(ch chan<- int) {
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resp, err := http.Get(ts.URL)
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if err != nil {
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t.Errorf(
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"Got error requesting test server - %v\n",
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err,
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)
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}
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respCh <- resp.StatusCode
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}(respCh)
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}
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tooManyReqErrCount := 0
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for i := 0; i < 6; i++ {
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code := <-respCh
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if code == 429 {
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tooManyReqErrCount++
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} else if code != 200 {
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t.Errorf("Got non-200 resp code - %d\n", code)
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}
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}
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duration := time.Since(startTime)
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if duration < time.Duration(500*time.Millisecond) {
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// as globalMaxConn is 1, only 1 request will execute
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// at a time, and the five allowed requested will take
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// at least 500 ms.
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t.Errorf("Expected all requests to take at least 500ms, but it was done in %v\n",
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duration)
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}
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if tooManyReqErrCount != 1 {
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t.Errorf("Expected to get 1 error, but got %d",
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tooManyReqErrCount)
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}
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ts.Close()
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// restore the global Max connections
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globalMaxConn = saveGlobalMaxConn
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}
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