mirror of https://github.com/knative/pkg.git
122 lines
3.6 KiB
Go
122 lines
3.6 KiB
Go
/*
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Copyright 2020 The Knative Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 spoof
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import (
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"fmt"
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"net/http"
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"strings"
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"sync"
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"k8s.io/apimachinery/pkg/util/sets"
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)
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// MatchesBody checks that the *first* response body matches the "expected" body, otherwise failing.
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func MatchesBody(expected string) ResponseChecker {
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return func(resp *Response) (bool, error) {
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if !strings.Contains(string(resp.Body), expected) {
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// Returning (true, err) causes SpoofingClient.Poll to fail.
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return true, fmt.Errorf("body = %s, want: %s", string(resp.Body), expected)
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}
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return true, nil
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}
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}
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// MatchesAllOf combines multiple ResponseCheckers to one ResponseChecker with a logical AND. The
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// checkers are executed in order. The first function to trigger an error or a retry will short-circuit
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// the other functions (they will not be executed).
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//
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// This is useful for combining a body with a status check like:
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// MatchesAllOf(IsStatusOK, MatchesBody("test"))
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//
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// The MatchesBody check will only be executed after the IsStatusOK has passed.
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func MatchesAllOf(checkers ...ResponseChecker) ResponseChecker {
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return func(resp *Response) (bool, error) {
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for _, checker := range checkers {
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if done, err := checker(resp); err != nil || !done {
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return done, err
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}
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}
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return true, nil
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}
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}
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// MatchesAllBodies checks that the *first* response body matches the "expected" body, otherwise failing.
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func MatchesAllBodies(all ...string) ResponseChecker {
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var m sync.Mutex
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// This helps with two things:
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// 1. we can use Equal on sets
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// 2. it will collapse the duplicates
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want := sets.NewString(all...)
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seen := make(sets.String, len(all))
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return func(resp *Response) (bool, error) {
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bs := string(resp.Body)
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for expected := range want {
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if !strings.Contains(bs, expected) {
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// See if the next one matches.
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continue
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}
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m.Lock()
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defer m.Unlock()
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seen.Insert(expected)
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// Stop once we've seen them all.
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return want.Equal(seen), nil
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}
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// Returning (true, err) causes SpoofingClient.Poll to fail.
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return true, fmt.Errorf("body = %s, want one of: %s", bs, all)
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}
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}
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// IsStatusOK checks that the response code is a 200.
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func IsStatusOK(resp *Response) (bool, error) {
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return IsOneOfStatusCodes(http.StatusOK)(resp)
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}
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// IsOneOfStatusCodes checks that the response code is equal to the given one.
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func IsOneOfStatusCodes(codes ...int) ResponseChecker {
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return func(resp *Response) (bool, error) {
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for _, code := range codes {
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if resp.StatusCode == code {
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return true, nil
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}
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}
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return true, fmt.Errorf("status = %d %s, want one of: %v", resp.StatusCode, resp.Status, codes)
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}
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}
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// Retrying modifies a ResponseChecker to retry certain response codes.
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func Retrying(rc ResponseChecker, codes ...int) ResponseChecker {
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return func(resp *Response) (bool, error) {
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for _, code := range codes {
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if resp.StatusCode == code {
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// Returning (false, nil) causes SpoofingClient.Poll to retry.
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// sc.logger.Info("Retrying for code ", resp.StatusCode)
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return false, nil
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}
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}
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// If we didn't match any retryable codes, invoke the ResponseChecker that we wrapped.
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return rc(resp)
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}
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}
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