Add HttpClient

Issue-ID: AAF-996
Signed-off-by: Tomasz Wrobel <tomasz.wrobel@nokia.com>
Change-Id: I3ebb0ea88ef1a72c16064fd9a1931943b57410d8

2 files changed, 214 insertions, 0 deletions

diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CerServiceRequestTestData.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CerServiceRequestTestData.java
new file mode 100644
index 00000000..8f252c31
--- /dev/null
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/CerServiceRequestTestData.java
@@ -0,0 +1,89 @@
+/*
+ * ============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * 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 org.onap.aaf.certservice.client;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+
+public final class CerServiceRequestTestData {
+
+    private static final String RESOURCE_PATH = "src/test/resources/";
+
+    // Request parameters
+    public static final String CA_NAME = "TestCA";
+    public static final String CSR = getCsrValue();
+    public static final String PK = getPkValue();
+
+    // Correct response data
+    public static final String CORRECT_RESPONSE = getCorrectResponse();
+    public static final String EXPECTED_FIRST_ELEMENT_OF_CERTIFICATE_CHAIN =
+            getExpectedFirstElementOfCertificateChain();
+    public static final String EXPECTED_FIRST_ELEMENT_OF_TRUSTED_CERTIFICATES =
+            getExpectedFirstElementOfTrustedCertificates();
+
+    // Error response data
+    public static final String MISSING_PK_RESPONSE = getMissingPkResponse();
+
+    private CerServiceRequestTestData() {
+    }
+
+    private static String getMissingPkResponse() {
+        String fileName = "missingPkResponse";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String getExpectedFirstElementOfTrustedCertificates() {
+
+        String fileName = "expectedFirstElementOfTrustedCertificates";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String getExpectedFirstElementOfCertificateChain() {
+        String fileName = "expectedFirstElementOfCertificateChain";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String getCorrectResponse() {
+        String fileName = "correctResponse";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String getPkValue() {
+        String fileName = "testPk";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String getCsrValue() {
+        String fileName = "testCsr";
+        return readFromFile(RESOURCE_PATH + fileName);
+    }
+
+    private static String readFromFile(String path) {
+        try {
+            return Files.readString(Paths.get(path), StandardCharsets.UTF_8);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return "File not found";
+        }
+    }
+}
diff --git a/certServiceClient/src/test/java/org/onap/aaf/certservice/client/httpclient/HttpClientTest.java b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/httpclient/HttpClientTest.java
new file mode 100644
index 00000000..f65aefdf
--- /dev/null
+++ b/certServiceClient/src/test/java/org/onap/aaf/certservice/client/httpclient/HttpClientTest.java
@@ -0,0 +1,125 @@
+/*
+ * ============LICENSE_START=======================================================
+ * aaf-certservice-client
+ * ================================================================================
+ * 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 org.onap.aaf.certservice.client.httpclient;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.StatusLine;
+import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.impl.client.CloseableHttpClient;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.onap.aaf.certservice.client.api.ExitCode;
+import org.onap.aaf.certservice.client.httpclient.exception.CertServiceApiResponseException;
+import org.onap.aaf.certservice.client.httpclient.model.CertServiceResponse;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.util.List;
+
+import static java.net.HttpURLConnection.HTTP_BAD_REQUEST;
+import static java.net.HttpURLConnection.HTTP_OK;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.CA_NAME;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.CORRECT_RESPONSE;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.CSR;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.EXPECTED_FIRST_ELEMENT_OF_CERTIFICATE_CHAIN;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.EXPECTED_FIRST_ELEMENT_OF_TRUSTED_CERTIFICATES;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.MISSING_PK_RESPONSE;
+import static org.onap.aaf.certservice.client.CerServiceRequestTestData.PK;
+
+class HttpClientTest {
+
+    private HttpClient httpClient;
+    private CloseableHttpClient closeableHttpClient;
+    private HttpEntity httpEntity;
+    private StatusLine statusLine;
+    private CloseableHttpResponse httpResponse;
+
+    @BeforeEach
+    void setUp() {
+
+        closeableHttpClient = mock(CloseableHttpClient.class);
+        httpEntity = mock(HttpEntity.class);
+        statusLine = mock(StatusLine.class);
+        httpResponse = mock(CloseableHttpResponse.class);
+
+        CloseableHttpClientProvider httpClientProvider = mock(CloseableHttpClientProvider.class);
+
+        when(httpClientProvider.getClient()).thenReturn(closeableHttpClient);
+        String testCertServiceAddress = "";
+        httpClient = new HttpClient(httpClientProvider, testCertServiceAddress);
+    }
+
+    @Test
+    void shouldReturnCorrectListsOfCertificatedChainsAndTrustedCertificates_WhenRequestDataIsCorrect()
+            throws Exception {
+
+        // given
+        mockServerResponse(HTTP_OK, CORRECT_RESPONSE);
+
+        // when
+        CertServiceResponse certServiceResponse =
+                httpClient.retrieveCertServiceData(CA_NAME, CSR, PK);
+        List<String> certificateChain = certServiceResponse.getCertificateChain();
+        List<String> trustedCertificate = certServiceResponse.getTrustedCertificates();
+
+        // then
+        assertNotNull(certServiceResponse);
+
+        final int expectedTwoElements = 2;
+        assertEquals(expectedTwoElements, certificateChain.size());
+        assertEquals(expectedTwoElements, trustedCertificate.size());
+
+        assertEquals(EXPECTED_FIRST_ELEMENT_OF_CERTIFICATE_CHAIN, certificateChain.get(0));
+        assertEquals(EXPECTED_FIRST_ELEMENT_OF_TRUSTED_CERTIFICATES, trustedCertificate.get(0));
+    }
+
+    @Test
+    void shouldThrowCertServiceApiResponseException_WhenPkHeaderIsMissing() throws Exception {
+
+        // given
+        mockServerResponse(HTTP_BAD_REQUEST, MISSING_PK_RESPONSE);
+
+        // when
+        CertServiceApiResponseException exception =
+                assertThrows(CertServiceApiResponseException.class,
+                        () -> httpClient.retrieveCertServiceData(CA_NAME, CSR, ""));
+
+        // then
+        assertEquals(ExitCode.CERT_SERVICE_API_CONNECTION_EXCEPTION.getValue(), exception.applicationExitCode());
+    }
+
+    private void mockServerResponse(int serverCodeResponse, String stringResponse)
+            throws IOException {
+        when(statusLine.getStatusCode()).thenReturn(serverCodeResponse);
+        when(httpResponse.getStatusLine()).thenReturn(statusLine);
+        when(httpResponse.getEntity()).thenReturn(httpEntity);
+        when(closeableHttpClient.execute(any(HttpGet.class))).thenReturn(httpResponse);
+
+        when(httpEntity.getContent()).thenReturn(new ByteArrayInputStream(stringResponse.getBytes()));
+    }
+}