Improve LicenseManagerImpl implementation

- Use STAX API for XML processing instead of parsing it manually
- Rearrange code for clarity and testing
- Adjust JUnits accordingly

Issue-ID: APPC-1024
Change-Id: I9d655b581adb401b0c20bc29eda6a2bce1f2ef89
Signed-off-by: Joanna Jeremicz <joanna.jeremicz@nokia.com>

3 files changed, 157 insertions, 21 deletions

diff --git a/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/LicenseManagerImplTest.java b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/LicenseManagerImplTest.java
index c025c987b..9d2fb87b4 100644
--- a/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/LicenseManagerImplTest.java
+++ b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/LicenseManagerImplTest.java
@@ -2,7 +2,7 @@
  * ============LICENSE_START=======================================================
  * ONAP : APPC
  * ================================================================================
- * Copyright (C) 2018 Nokia.
+ * Modifications Copyright (C) 2018 Nokia
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,14 +24,15 @@ package org.onap.appc.licmgr.impl;
 
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNull;
 import static org.mockito.BDDMockito.given;
 import static org.onap.appc.licmgr.Constants.SDC_ARTIFACTS_FIELDS.ARTIFACT_CONTENT;
 
+import java.io.InputStream;
 import java.util.Collections;
-import java.util.Map;
 import java.util.HashMap;
 import org.junit.Before;
+import java.util.Map;
+import java.util.Scanner;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -53,6 +54,7 @@ public class LicenseManagerImplTest {
     @Before
     public void setUp() {
         licenseManager = new LicenseManagerImpl();
+        licenseManager.setDAService(licenseDataAccessService);
     }
 
     @Test
@@ -65,15 +67,13 @@ public class LicenseManagerImplTest {
             .willReturn(Collections.emptyMap());
 
         // WHEN THEN
-        licenseManager.setDAService(licenseDataAccessService);
-
         assertThatExceptionOfType(DataAccessException.class)
             .isThrownBy(() -> licenseManager.retrieveLicenseModel(VNF_TYPE, VNF_VERSION))
             .withMessage(expectedMessage);
     }
 
     @Test
-    public void retrieveLicenseModel_shouldReturnLicenseModelWithNullValues_whenXmlIsMalformed() {
+    public void retrieveLicenseModel_shouldThrowException_whenXmlIsMalformed() {
 
         // GIVEN
         String malformedXml = "xyz";
@@ -83,27 +83,21 @@ public class LicenseManagerImplTest {
         given(licenseDataAccessService.retrieveLicenseModelData(VNF_TYPE, VNF_VERSION))
             .willReturn(licenseModelData);
 
-        // WHEN
-        licenseManager.setDAService(licenseDataAccessService);
-        LicenseModel licenseModel = licenseManager.retrieveLicenseModel(VNF_TYPE, VNF_VERSION);
-
-        // THEN
-        assertNull(licenseModel.getEntitlementPoolUuid());
-        assertNull(licenseModel.getLicenseKeyGroupUuid());
+        // WHEN THEN
+        assertThatExceptionOfType(DataAccessException.class)
+            .isThrownBy(() -> licenseManager.retrieveLicenseModel(VNF_TYPE, VNF_VERSION));
     }
 
     @Test
     public void retrieveLicenseModel_shouldReturnCorrectLicenseModel_whenCorrectXmlExists() {
 
         // GIVEN
-        String expectedEntitlementPool = "default_entitlement_pool";
-        String expectedKeyGroup = "default_key_group";
+        String expectedEntitlementPool = "default_entitlement_pool_uuid";
+        String expectedKeyGroup = "default_lkg_uuid";
 
-        String correctlyFormedXml = String.format("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
-            + "<parent>\n"
-            + "<entitlement-pool-uuid>%s</entitlement-pool-uuid>\n"
-            + "<license-key-group-uuid>%s</license-key-group-uuid>\n"
-            + "</parent>", expectedEntitlementPool, expectedKeyGroup);
+        ClassLoader classLoader = getClass().getClassLoader();
+        InputStream inputStream = classLoader.getResourceAsStream("test-vf-license-model.xml");
+        String correctlyFormedXml = new Scanner(inputStream).useDelimiter("\\A").next();
 
         Map<String, String> licenseModelData = new HashMap<>();
         licenseModelData.put(ARTIFACT_CONTENT.name(), correctlyFormedXml);
@@ -111,7 +105,6 @@ public class LicenseManagerImplTest {
             .willReturn(licenseModelData);
 
         // WHEN
-        licenseManager.setDAService(licenseDataAccessService);
         LicenseModel licenseModel = licenseManager.retrieveLicenseModel(VNF_TYPE, VNF_VERSION);
 
         // THEN
diff --git a/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/XmlToLicenseModelConverterTest.java b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/XmlToLicenseModelConverterTest.java
new file mode 100644
index 000000000..d0c48cc93
--- /dev/null
+++ b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/java/org/onap/appc/licmgr/impl/XmlToLicenseModelConverterTest.java
@@ -0,0 +1,80 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APPC
+ * ================================================================================
+ * Copyright (C) 2018 Nokia
+ * =============================================================================
+ * 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.appc.licmgr.impl;
+
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.BDDMockito.then;
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.anyString;
+
+import java.io.IOException;
+import java.io.InputStream;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+
+
+@RunWith(MockitoJUnitRunner.class)
+public class XmlToLicenseModelConverterTest {
+
+    @Mock
+    private XMLStreamReader xmlStreamReader;
+
+    @Mock
+    private XMLInputFactory xmlInputFactory;
+
+    @Test
+    public void apply_shouldCloseXMLStreamReader_whenNoExceptionIsThrown()
+        throws XMLStreamException, IOException {
+
+        // GIVEN
+        XmlToLicenseModelConverter converter = new XmlToLicenseModelConverter(xmlInputFactory);
+        given(xmlInputFactory.createXMLStreamReader(any(InputStream.class))).willReturn(xmlStreamReader);
+
+        // WHEN
+        converter.convert((a, b) -> {
+        }, anyString(), null);
+
+        // THEN
+        then(xmlStreamReader).should().close();
+    }
+
+    @Test
+    public void apply_shouldCloseXMLStreamReader_whenExceptionIsThrown()
+        throws XMLStreamException {
+        // GIVEN
+        XmlToLicenseModelConverter converter = new XmlToLicenseModelConverter(xmlInputFactory);
+        given(xmlInputFactory.createXMLStreamReader(any(InputStream.class))).willReturn(xmlStreamReader);
+
+        // WHEN THEN
+        assertThatExceptionOfType(XMLStreamException.class)
+            .isThrownBy(() -> converter.convert((a, b) -> {
+                throw new XMLStreamException();
+            }, anyString(), null));
+        then(xmlStreamReader).should().close();
+    }
+}
\ No newline at end of file
diff --git a/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/resources/test-vf-license-model.xml b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/resources/test-vf-license-model.xml
new file mode 100644
index 000000000..6f32f50b8
--- /dev/null
+++ b/appc-dispatcher/appc-license-manager/appc-license-manager-core/src/test/resources/test-vf-license-model.xml
@@ -0,0 +1,63 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<!--
+  ============LICENSE_START=======================================================
+  ONAP : APPC
+  ================================================================================
+  Copyright (C) 2018 Nokia
+  =============================================================================
+  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=========================================================
+  -->
+<vf-license-model>
+  <vnf-id>default_vnf_id</vnf-id>
+  <vendor-name>default_vendor_name</vendor-name>
+  <feature-group-list>
+    <feature-group>
+      <feature-group-uuid>default_feature_group_uuid</feature-group-uuid>
+      <name>default_fg_name</name>
+      <description>default_fg_ description</description>
+      <att-part-number>default_part_number</att-part-number>
+      <entitlement-pool-list>
+        <entitlement-pool>
+          <entitlement-pool-uuid>default_entitlement_pool_uuid</entitlement-pool-uuid>
+          <name>default_ep_name</name>
+          <description>default_ep_description</description>
+          <manufacturer-reference-number>default_manufacturer_reference_number</manufacturer-reference-number>
+          <threshold-value>
+            <value>1</value>
+            <unit>default_unit</unit>
+          </threshold-value>
+          <entitlement-metric>
+            <value>default_em_value</value>
+          </entitlement-metric>
+          <increments>default_increments</increments>
+          <aggregation-function>
+            <value>default_af_value</value>
+          </aggregation-function>
+          <time>
+            <value>default_time</value>
+          </time>
+        </entitlement-pool>
+      </entitlement-pool-list>
+      <license-key-group-list>
+        <license-key-group>
+          <license-key-group-uuid>default_lkg_uuid</license-key-group-uuid>
+          <name>default_lkg_name</name>
+          <description>default_lkg_description</description>
+          <type>default_lkg_type</type>
+        </license-key-group>
+      </license-key-group-list>
+    </feature-group>
+  </feature-group-list>
+</vf-license-model>
\ No newline at end of file