fix potential nullpointer from sonar

MsoMulticloudUtils: multicloudClient may be null
throw MsoException if it is null (instead of NullPointer)
removed unnecessary StackInfo object creation
using format specifiers for a logger instead of String concatenation
removed else block to make the code easier to read
Added tests for the method

Change-Id: I80d2e0ba2ef2d20c488cdfcf103d9cfa5784ab65
Issue-ID: SO-1516
Signed-off-by: k.kazak <k.kazak@samsung.com>

2 files changed, 144 insertions, 21 deletions

diff --git a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoMulticloudUtils.java b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoMulticloudUtils.java
index 5c0110b680..49758a1240 100644
--- a/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoMulticloudUtils.java
+++ b/adapters/mso-adapter-utils/src/main/java/org/onap/so/openstack/utils/MsoMulticloudUtils.java
@@ -4,6 +4,8 @@
  * ================================================================================
  * Copyright (C) 2018 Intel Corp. All rights reserved.
  * ================================================================================
+ * Modifications Copyright (c) 2019 Samsung
+ * ================================================================================
  * 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
@@ -20,6 +22,9 @@
 
 package org.onap.so.openstack.utils;
 
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.woorea.openstack.heat.model.CreateStackParam;
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Arrays;
@@ -27,10 +32,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Scanner;
-
 import javax.ws.rs.core.Response;
 import javax.ws.rs.core.UriBuilderException;
-
 import org.onap.so.adapters.vdu.CloudInfo;
 import org.onap.so.adapters.vdu.PluginAction;
 import org.onap.so.adapters.vdu.VduArtifact;
@@ -59,10 +62,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.env.Environment;
 import org.springframework.stereotype.Component;
 
-import com.fasterxml.jackson.databind.JsonNode;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.woorea.openstack.heat.model.CreateStackParam;
-
 @Component
 public class MsoMulticloudUtils extends MsoHeatUtils implements VduPlugin{
 
@@ -194,30 +193,35 @@ public class MsoMulticloudUtils extends MsoHeatUtils implements VduPlugin{
         String multicloudEndpoint = getMulticloudEndpoint(cloudSiteId, null);
         RestClient multicloudClient = getMulticloudClient(multicloudEndpoint);
 
-        Response response = multicloudClient.post(multicloudRequest);
+        if (multicloudClient == null) {
+            MsoOpenstackException me = new MsoOpenstackException(0, "", "Multicloud client could not be initialized");
+            me.addContext(CREATE_STACK);
+            throw me;
+        }
 
-        StackInfo createInfo = new StackInfo();
-        createInfo.setName(stackName);
+        Response response = multicloudClient.post(multicloudRequest);
 
         MulticloudCreateResponse multicloudResponseBody = null;
         if (response.hasEntity()) {
-            multicloudResponseBody = getCreateBody((java.io.InputStream)response.getEntity());
+            multicloudResponseBody = getCreateBody((java.io.InputStream) response.getEntity());
         }
         if (response.getStatus() == Response.Status.CREATED.getStatusCode() && response.hasEntity()) {
-            createInfo.setCanonicalName(stackName + "/" + multicloudResponseBody.getWorkloadId());
-            if (logger.isDebugEnabled()) {
-                logger.debug("Multicloud Create Response Body: " + multicloudResponseBody);
+            String canonicalName = stackName + "/";
+            if (multicloudResponseBody != null) {
+                canonicalName = canonicalName + multicloudResponseBody.getWorkloadId();
             }
-            return getStackStatus(cloudSiteId, tenantId, createInfo.getCanonicalName(), pollForCompletion, timeoutMinutes, backout);
-        } else {
-            StringBuilder stackErrorStatusReason = new StringBuilder(response.getStatusInfo().getReasonPhrase());
-            if (null != multicloudResponseBody) {
-                stackErrorStatusReason.append(multicloudResponseBody.toString());
+            if (logger.isDebugEnabled()) {
+                logger.debug("Multicloud Create Response Body: {}", multicloudResponseBody);
             }
-            MsoOpenstackException me = new MsoOpenstackException(0, "", stackErrorStatusReason.toString());
-            me.addContext(CREATE_STACK);
-            throw me;
+            return getStackStatus(cloudSiteId, tenantId, canonicalName, pollForCompletion, timeoutMinutes, backout);
+        }
+        StringBuilder stackErrorStatusReason = new StringBuilder(response.getStatusInfo().getReasonPhrase());
+        if (null != multicloudResponseBody) {
+            stackErrorStatusReason.append(multicloudResponseBody.toString());
         }
+        MsoOpenstackException me = new MsoOpenstackException(0, "", stackErrorStatusReason.toString());
+        me.addContext(CREATE_STACK);
+        throw me;
     }
 
     @Override
diff --git a/adapters/mso-adapter-utils/src/test/java/org/onap/so/openstack/utils/MsoMulticloudUtilsTest.java b/adapters/mso-adapter-utils/src/test/java/org/onap/so/openstack/utils/MsoMulticloudUtilsTest.java
new file mode 100644
index 0000000000..fcb651e4dd
--- /dev/null
+++ b/adapters/mso-adapter-utils/src/test/java/org/onap/so/openstack/utils/MsoMulticloudUtilsTest.java
@@ -0,0 +1,119 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2019 Samsung Intellectual Property. 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.so.openstack.utils;
+
+import static com.github.tomakehurst.wiremock.client.WireMock.aResponse;
+import static com.github.tomakehurst.wiremock.client.WireMock.post;
+import static com.github.tomakehurst.wiremock.client.WireMock.stubFor;
+import static com.github.tomakehurst.wiremock.client.WireMock.urlPathEqualTo;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Optional;
+import org.apache.http.HttpStatus;
+import org.junit.Test;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.onap.so.BaseTest;
+import org.onap.so.cloud.CloudConfig;
+import org.onap.so.db.catalog.beans.CloudIdentity;
+import org.onap.so.db.catalog.beans.CloudSite;
+import org.onap.so.openstack.beans.StackInfo;
+import org.onap.so.openstack.exceptions.MsoException;
+import org.springframework.beans.factory.annotation.Autowired;
+
+public class MsoMulticloudUtilsTest extends BaseTest {
+
+    @Autowired
+    private MsoMulticloudUtils multicloudUtils;
+
+    @InjectMocks
+    private MsoMulticloudUtils multicloudUtilsMock;
+
+    @Mock
+    private CloudConfig cloudConfigMock;
+
+    private static final String CREATE_STACK_RESPONSE = "{\"template_type\": \"TEST-template\", \"workload_id\": "
+        + "\"TEST-workload\", \"template_response\": {\"stack\": {\"id\": \"TEST-stack\", \"links\": []}}}";
+
+    @Test
+    public void createStackSuccess() throws MsoException, IOException {
+        stubFor(post(urlPathEqualTo("/v2.0"))
+            .willReturn(aResponse().withHeader("Content-Type", "application/json")
+                .withBody(CREATE_STACK_RESPONSE)
+                .withStatus(HttpStatus.SC_CREATED)));
+        StackInfo result = multicloudUtils.createStack("MTN13", "TEST-tenant", "TEST-stack",
+            "TEST-heat", new HashMap<>(), false, 200, "TEST-env",
+            new HashMap<>(), new HashMap<>());
+        assertNotNull(result);
+        assertEquals("TEST-stack", result.getName());
+    }
+
+    @Test
+    public void createStackMulticloudClientIsNull() {
+        try {
+            multicloudUtilsMock.cloudConfig = cloudConfigMock;
+            CloudSite cloudSite = new CloudSite();
+            cloudSite.setIdentityService(new CloudIdentity());
+            when(cloudConfigMock.getCloudSite("MTN13")).
+                thenReturn(Optional.of(cloudSite));
+            multicloudUtilsMock.createStack("MTN13", "TEST-tenant", "TEST-stack",
+                "TEST-heat", new HashMap<>(), false, 200, "TEST-env",
+                new HashMap<>(), new HashMap<>());
+        } catch (MsoException e) {
+            assertEquals("0 : Multicloud client could not be initialized", e.toString());
+            return;
+        }
+        fail("MsoOpenstackException expected!");
+    }
+
+    @Test
+    public void createStackBadRequest() {
+        try {
+            stubFor(post(urlPathEqualTo("/v2.0"))
+                .willReturn(aResponse().withHeader("Content-Type", "application/json")
+                    .withStatus(HttpStatus.SC_BAD_REQUEST)));
+            multicloudUtils.createStack("MTN13", "TEST-tenant", "TEST-stack",
+                "TEST-heat", new HashMap<>(), false, 200, "TEST-env",
+                new HashMap<>(), new HashMap<>());
+        } catch (MsoException e) {
+            assertEquals("0 : Bad Request", e.toString());
+            return;
+        }
+        fail("MsoOpenstackException expected!");
+    }
+
+    @Test
+    public void createStackEmptyResponseEntity() throws MsoException {
+        stubFor(post(urlPathEqualTo("/v2.0"))
+            .willReturn(aResponse().withHeader("Content-Type", "application/json")
+                .withStatus(HttpStatus.SC_CREATED)));
+        StackInfo result = multicloudUtils.createStack("MTN13", "TEST-tenant", "TEST-stack",
+            "TEST-heat", new HashMap<>(), false, 200, "TEST-env",
+            new HashMap<>(), new HashMap<>());
+        assertNotNull(result);
+        assertEquals("TEST-stack/", result.getName());
+    }
+}