Handle null case in `GroupVersionUpdater`

- change in the final condition of `isGenerateGroupUUID`
- Added tests related to modified code

Issue-ID: SDC-2913
Signed-off-by: Chris Andre <chris.andre@yoppworks.com>
Change-Id: I22738f9f4922467209a16a4d6b3b78d7bfac11c9

2 files changed, 330 insertions, 13 deletions

diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdater.java b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdater.java
index bb4d884811..8e9ba7a88b 100644
--- a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdater.java
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdater.java
@@ -20,7 +20,8 @@
 
 package org.openecomp.sdc.be.components.impl.group;
 
-
+import java.util.Collections;
+import java.util.stream.Collectors;
 import org.openecomp.sdc.be.components.impl.version.OnChangeVersionCommand;
 import org.openecomp.sdc.be.dao.api.ActionStatus;
 import org.openecomp.sdc.be.datatypes.enums.GroupTypeEnum;
@@ -37,7 +38,6 @@ import org.openecomp.sdc.common.log.wrappers.Logger;
 import java.util.List;
 import java.util.Map;
 import java.util.function.Consumer;
-import java.util.stream.Collectors;
 
 import static org.apache.commons.collections.CollectionUtils.isEmpty;
 
@@ -84,27 +84,39 @@ public class GroupVersionUpdater implements OnChangeVersionCommand {
             }
             group.setVersion(String.valueOf(newVersion));
         }
+    }
 
+    static <T> List<T> emptyIfNull(final List<T> list) {
+        return (list == null? Collections.emptyList() : list);
     }
 
-    private boolean isGenerateGroupUUID(GroupDefinition group, Component container) {
-        if(GroupTypeEnum.VF_MODULE.getGroupTypeName().equals(group.getType())){
-            List<String> artifactsUuid = group.getArtifactsUuid();
-            List<String> heatArtifactUniqueIDs = group.getArtifacts().stream().filter(a->!a.endsWith("env")).collect(Collectors.toList());
-            Map<String, ArtifactDefinition> deploymentArtifacts = container.getDeploymentArtifacts();
-            for (String heatArtifactUniqueID : heatArtifactUniqueIDs){
-                ArtifactDefinition artifactDefinition = deploymentArtifacts.get(heatArtifactUniqueID.split("\\.", -1)[1]);
-                if((artifactDefinition == null || artifactDefinition.isEmpty())
-                        && !artifactsUuid.contains(artifactDefinition.getArtifactUUID()) ){
+    static <T, U> Map<T, U> emptyIfNull(final Map<T, U> list) {
+        return (list == null? Collections.emptyMap() : list);
+    }
+
+    static boolean isGenerateGroupUUID(GroupDefinition group, Component container) {
+        if (!GroupTypeEnum.VF_MODULE.getGroupTypeName().equals(group.getType())) {
+            return true;
+        } else {
+            List<String> artifactsUuid = emptyIfNull(group.getArtifactsUuid());
+            Map<String, ArtifactDefinition> deploymentArtifacts = emptyIfNull(container.getDeploymentArtifacts());
+            List<String> heatArtifactUniqueIDs = emptyIfNull(group.getArtifacts()).stream().filter(a -> !a.endsWith("env")).collect(
+                Collectors.toList());
+
+            for (String heatArtifactUniqueID : heatArtifactUniqueIDs) {
+                ArtifactDefinition artifactDefinition = deploymentArtifacts
+                    .get(heatArtifactUniqueID.split("\\.", -1)[1]);
+
+                if ((artifactDefinition == null
+                    || artifactDefinition.isEmpty())
+                    || !artifactsUuid.contains(artifactDefinition.getArtifactUUID())) {
                     return true;
                 }
             }
             return false;
         }
-        return true;
     }
 
-
     private ActionStatus updateGroupsVersion(Component groupsContainer, Consumer<List<GroupDefinition>> updateGroupVersion) {
         List<GroupDefinition> groups = groupsContainer.getGroups();
         if (isEmpty(groups)) {
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdaterTest.java b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdaterTest.java
new file mode 100644
index 0000000000..4e08545acb
--- /dev/null
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/group/GroupVersionUpdaterTest.java
@@ -0,0 +1,305 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2020 AT&T 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.openecomp.sdc.be.components.impl.group;
+
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import io.vavr.collection.HashMap;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Supplier;
+import java.util.stream.Collectors;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.openecomp.sdc.be.datatypes.enums.GroupTypeEnum;
+import org.openecomp.sdc.be.model.ArtifactDefinition;
+import org.openecomp.sdc.be.model.Component;
+import org.openecomp.sdc.be.model.GroupDefinition;
+
+public class GroupVersionUpdaterTest {
+
+    @Test
+    @DisplayName("emptyIfNull(List<T>) - should return the same List passed as an argument if it is not null")
+    public void safeAccessList_NotNull() {
+        //Given
+        List<String> arg = defaultArtifactsUuid.get();
+
+        //When
+        List<String> result = GroupVersionUpdater.emptyIfNull(arg);
+
+        //Then
+        assertSame(arg, result);
+    }
+
+    @Test
+    @DisplayName("emptyIfNull(List<T>) - should return an empty List if we pass it a null value")
+    public void safeAccessList_Null() {
+        //Given
+        List<String> arg = null;
+
+        //When
+        List<String> result = GroupVersionUpdater.emptyIfNull(arg);
+
+        //Then
+        assertSame(Collections.EMPTY_LIST, result);
+    }
+
+    @Test
+    @DisplayName("emptyIfNull(Map<T, U>) - should return the same Map passed as an argument if it is not null")
+    public void safeAccessMap_NotNull() {
+        //Given
+        Map<String, ArtifactDefinition> arg = defaultDeploymentArtifacts.get();
+
+        //When
+        Map<String, ArtifactDefinition> result = GroupVersionUpdater.emptyIfNull(arg);
+
+        //Then
+        assertSame(arg, result);
+    }
+
+    @Test
+    @DisplayName("emptyIfNull(Map<T, U>) - should return an empty Map if we pass it a null value")
+    public void safeAccessMap_Null() {
+        //Given
+        Map<String, ArtifactDefinition> arg = null;
+
+        //When
+        Map<String, ArtifactDefinition> result = GroupVersionUpdater.emptyIfNull(arg);
+
+        //Then
+        assertSame(Collections.EMPTY_MAP, result);
+    }
+
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - Return true if there is a deployment artifact in the container that is not"
+        + " part of the group")
+    public void isGenerateGroupUUID_GoldenPath() {
+        // Given
+        Supplier<String> type = defaultGroupType;
+        Supplier<List<String>> artifactsUuid = defaultArtifactsUuid;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `group`'s type is not GroupTypeEnum.VF_MODULE")
+    public void isGenerateGroupUUID_GroupIsNotVFModule() {
+        // Given
+        Supplier<String> type = GroupTypeEnum.HEAT_STACK::getGroupTypeName;
+        Supplier<List<String>> artifactsUuid = defaultArtifactsUuid;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `group`'s type is null")
+    public void isGenerateGroupUUID_NullGroupType() {
+        // Given
+        Supplier<String> type = () -> null;
+        Supplier<List<String>> artifactsUuid = defaultArtifactsUuid;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `container`'s DeploymentArtifacts is null")
+    public void isGenerateGroupUUID_NullDeploymentArtifacts() {
+        // Given
+        Supplier<String> type = defaultGroupType;
+        Supplier<List<String>> artifactsUuid = defaultArtifactsUuid;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = () -> null;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertTrue(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `group`'s artifactUuid is null")
+    public void isGenerateGroupUUID_NullGroupArtifactUuid() {
+        // Given
+        Supplier<String> type = defaultGroupType;
+        Supplier<List<String>> artifactsUuid = () -> null;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertFalse(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `group`'s artifactUuid only has artifactUuid ending with 'env'")
+    public void isGenerateGroupUUID_OnlyArtifactEndingWithEnv() {
+        // Given
+        Supplier<String> type = defaultGroupType;
+        Supplier<List<String>> artifactsUuid = () ->
+            defaultArtifactsUuid.get().stream()
+                .map(str -> str + ".env")
+                .collect(Collectors.toList());
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertFalse(result);
+    }
+
+    @Test
+    @DisplayName("isGenerateGroupUUID - `group`'s artifactUuid is not part of the container's list of deployment artifacts")
+    public void isGenerateGroupUUID_NoMatchingUuidInContainer() {
+        // Given
+        Supplier<String> type = defaultGroupType;
+        Supplier<List<String>> artifactsUuid = defaultArtifactsUuid;
+        GroupDefinition group = getGroup(
+            type,
+            artifactsUuid
+        );
+
+        Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts = defaultDeploymentArtifacts;
+        Component container = getContainer(deploymentArtifacts);
+
+        // When
+        boolean result = GroupVersionUpdater.isGenerateGroupUUID(group, container);
+
+        // Then
+        assertTrue(result);
+    }
+
+    Supplier<String> defaultGroupType = GroupTypeEnum.VF_MODULE::getGroupTypeName;
+
+    Supplier<List<String>> defaultArtifactsUuid = () -> Arrays.asList(
+        "uniqueId1.1",
+        "uniqueId2.2",
+        "uniqueId3.3",
+        "uniqueId4.4",
+        "uniqueId5.5",
+        "uniqueId6.6",
+        "uniqueId7.7",
+        "uniqueId8.8",
+        "uniqueId9.9"
+    );
+
+    Supplier<Map<String, ArtifactDefinition>> defaultDeploymentArtifacts = () -> HashMap.of(
+        "uniqueId1.1", getArtifactDefinition("uniqueId1.1"),
+        "uniqueId2.2", getArtifactDefinition("uniqueId2.2"),
+        "uniqueId3.3", getArtifactDefinition("uniqueId3.3"),
+        "uniqueId44", getArtifactDefinition("uniqueId4.4"),
+        "uniqueId5.5", getArtifactDefinition("uniqueId5.5"),
+        "uniqueId6.6", getArtifactDefinition("uniqueId6.6"),
+        "uniqueId7.7", getArtifactDefinition("uniqueId7.7"),
+        "uniqueId8.8", getArtifactDefinition("uniqueId8.8"),
+        "uniqueId9.9", getArtifactDefinition("uniqueId9.9"),
+        "uniqueId.not.found", getArtifactDefinition("uniqueId.not.found")
+    ).toJavaMap();
+
+    ArtifactDefinition getArtifactDefinition(String artifactUuid) {
+        return new ArtifactDefinition() {
+            @Override
+            public String getArtifactUUID() {
+                return artifactUuid;
+            }
+        };
+    }
+
+    GroupDefinition getGroup(Supplier<String> type, Supplier<List<String>> artifacts) {
+        return new GroupDefinition() {
+            @Override
+            public String getType() {
+                return type.get();
+            }
+
+            @Override
+            public List<String> getArtifacts() {
+                return artifacts.get();
+            }
+        };
+    }
+
+    Component getContainer(Supplier<Map<String, ArtifactDefinition>> deploymentArtifacts) {
+        return new Component(null) {
+            @Override
+            public Map<String, ArtifactDefinition> getDeploymentArtifacts() {
+                return deploymentArtifacts.get();
+            }
+        };
+    }
+}