93 lines
2.7 KiB
Go
93 lines
2.7 KiB
Go
/*
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Copyright 2019 The Kubernetes 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 controller
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import (
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"bytes"
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"fmt"
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"net/http"
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"net/http/httptest"
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"strings"
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"testing"
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admissionv1 "k8s.io/api/admission/v1"
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)
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type testAdmissionHandler struct{}
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func (testAdmissionHandler) HandleAdmission(ar *admissionv1.AdmissionReview) {
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ar.Response = &admissionv1.AdmissionResponse{
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Allowed: true,
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}
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}
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type errorReader struct{}
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func (errorReader) Read(p []byte) (n int, err error) {
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return 0, fmt.Errorf("this is a test error")
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}
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type errorWriter struct{}
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func (errorWriter) Write(p []byte) (n int, err error) {
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return 0, fmt.Errorf("this is a test error")
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}
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func (errorWriter) Header() http.Header {
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return nil
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}
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func (errorWriter) WriteHeader(statusCode int) {}
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func TestServer(t *testing.T) {
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w := httptest.NewRecorder()
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b := bytes.NewBuffer(nil)
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writeAdmissionReview(b, &admissionv1.AdmissionReview{})
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// Happy path
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r := httptest.NewRequest("GET", "http://test.ns.svc", b)
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NewAdmissionControllerServer(testAdmissionHandler{}).ServeHTTP(w, r)
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ar, err := parseAdmissionReview(codecs.UniversalDeserializer(), w.Body)
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if w.Code != http.StatusOK {
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t.Errorf("when the admission review allows the request, the http status should be OK")
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}
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if err != nil {
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t.Errorf("failed to parse admission response when the admission controller returns a value")
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}
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if !ar.Response.Allowed {
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t.Errorf("when the admission review allows the request, the parsed body returns not allowed")
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}
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// Ensure the code does not panic when failing to handle the request
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NewAdmissionControllerServer(testAdmissionHandler{}).ServeHTTP(errorWriter{}, r)
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w = httptest.NewRecorder()
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NewAdmissionControllerServer(testAdmissionHandler{}).ServeHTTP(w, httptest.NewRequest("GET", "http://test.ns.svc", strings.NewReader("invalid-json")))
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if w.Code != http.StatusBadRequest {
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t.Errorf("when the server fails to read the request, the replied status should be bad request")
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}
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}
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func TestParseAdmissionReview(t *testing.T) {
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ar, err := parseAdmissionReview(codecs.UniversalDeserializer(), errorReader{})
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if ar != nil {
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t.Errorf("when reading from request fails, no AdmissionRewiew should be returned")
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}
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if err == nil {
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t.Errorf("when reading from request fails, an error should be returned")
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}
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}
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