[OOM-K8S-CERT-EXTERNAL-PROVIDER] Add client for CertService API

Issue-ID: OOM-2559
Signed-off-by: Remigiusz Janeczek <remigiusz.janeczek@nokia.com>
Change-Id: I3bf6c36b9eec7a661202b18eb7765e332ccfbc07

1 files changed, 101 insertions, 0 deletions

diff --git a/certServiceK8sExternalProvider/src/certserviceclient/cert_service_client_test.go b/certServiceK8sExternalProvider/src/certserviceclient/cert_service_client_test.go
new file mode 100644
index 00000000..1e15d43e
--- /dev/null
+++ b/certServiceK8sExternalProvider/src/certserviceclient/cert_service_client_test.go
@@ -0,0 +1,101 @@
+/*
+ * ============LICENSE_START=======================================================
+ * oom-certservice-k8s-external-provider
+ * ================================================================================
+ * Copyright (C) 2020 Nokia. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+
+package certserviceclient
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"onap.org/oom-certservice/k8s-external-provider/src/testdata"
+)
+
+const (
+	certificationUrl = "https://oom-cert-service:8443/v1/certificate/RA"
+)
+
+
+func Test_shouldParseCertificateResponseCorrectly(t *testing.T) {
+	responseJson := `{"certificateChain": ["cert-0", "cert-1"], "trustedCertificates": ["trusted-cert-0", "trusted-cert-1"]}`
+	responseJsonReader := ioutil.NopCloser(bytes.NewReader([]byte(responseJson)))
+	client := CertServiceClientImpl{
+		certificationUrl: certificationUrl,
+		httpClient:       &httpClientMock{
+			DoFunc: func(req *http.Request) (response *http.Response, e error) {
+				mockedResponse := &http.Response{
+					Body: responseJsonReader,
+				}
+				return mockedResponse, nil
+			},
+		},
+	}
+	response, _ := client.GetCertificates(testdata.CsrBytes, testdata.PkBytes)
+	assert.ElementsMatch(t, []string{"cert-0", "cert-1"}, response.CertificateChain)
+	assert.ElementsMatch(t, []string{"trusted-cert-0", "trusted-cert-1"}, response.TrustedCertificates)
+}
+
+func Test_shouldReturnError_whenResponseIsNotJson(t *testing.T) {
+	responseJson := `not a json`
+	responseJsonReader := ioutil.NopCloser(bytes.NewReader([]byte(responseJson)))
+	client := CertServiceClientImpl{
+		certificationUrl: certificationUrl,
+		httpClient:       &httpClientMock{
+			DoFunc: func(req *http.Request) (response *http.Response, e error) {
+				mockedResponse := &http.Response{
+					Body: responseJsonReader,
+				}
+				return mockedResponse, nil
+			},
+		},
+	}
+	response, err := client.GetCertificates(testdata.CsrBytes, testdata.PkBytes)
+
+	assert.Nil(t, response)
+	assert.Error(t, err)
+}
+
+func Test_shouldReturnError_whenHttpClientReturnsError(t *testing.T) {
+	client := CertServiceClientImpl{
+		certificationUrl: certificationUrl,
+		httpClient:       &httpClientMock{
+			DoFunc: func(req *http.Request) (response *http.Response, err error) {
+				return nil, fmt.Errorf("mock error")
+			},
+		},
+	}
+	response, err := client.GetCertificates(testdata.CsrBytes, testdata.PkBytes)
+
+	assert.Nil(t, response)
+	assert.Error(t, err)
+}
+
+
+type httpClientMock struct {
+	DoFunc func(*http.Request) (*http.Response, error)
+}
+
+func (client httpClientMock) Do(req *http.Request) (*http.Response, error) {
+	return client.DoFunc(req)
+}