Add 'direct' keyword to descendants option to query direct children (ep1)

-added 'direct' keyword also to Fetch Descendants Option along with 'all' and 'none' to Query direct child.
-added unit tests to test direct keyword

Issue-ID:CPS-1784
Change-Id: Iab7f59fbeebb03703626132c6d5c2afde0e5ab4d
Signed-off-by: Rudrangi Anupriya <ra00745022@techmahindra.com>

2 files changed, 9 insertions, 3 deletions

diff --git a/cps-rest/docs/openapi/components.yml b/cps-rest/docs/openapi/components.yml
index a7c13002bd..a72130562e 100644
--- a/cps-rest/docs/openapi/components.yml
+++ b/cps-rest/docs/openapi/components.yml
@@ -263,7 +263,7 @@ components:
     descendantsInQuery:
       name: descendants
       in: query
-      description: Number of descendants to query. Allowed values are 'none', 'all', -1 (for all), 0 (for none) and any positive number.
+      description: Number of descendants to query. Allowed values are 'none', 'all', 'direct', 1 (for direct), -1 (for all), 0 (for none) and any positive number.
       required: false
       schema:
         type: string
diff --git a/cps-rest/src/test/groovy/org/onap/cps/rest/controller/QueryRestControllerSpec.groovy b/cps-rest/src/test/groovy/org/onap/cps/rest/controller/QueryRestControllerSpec.groovy
index c4bb23ce4e..09e9ff5c4a 100644
--- a/cps-rest/src/test/groovy/org/onap/cps/rest/controller/QueryRestControllerSpec.groovy
+++ b/cps-rest/src/test/groovy/org/onap/cps/rest/controller/QueryRestControllerSpec.groovy
@@ -25,6 +25,7 @@ package org.onap.cps.rest.controller
 
 import org.onap.cps.utils.PrefixResolver
 
+import static org.onap.cps.spi.FetchDescendantsOption.DIRECT_CHILD_ONLY
 import static org.onap.cps.spi.FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS
 import static org.onap.cps.spi.FetchDescendantsOption.OMIT_DESCENDANTS
 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get
@@ -97,17 +98,21 @@ class QueryRestControllerSpec extends Specification {
             def dataNode1 = new DataNodeBuilder().withXpath('/xpath')
                 .withLeaves([leaf: 'value', leafList: ['leaveListElement1', 'leaveListElement2']]).build()
             mockCpsQueryService.queryDataNodes(dataspaceName, anchorName, cpsPath, { descendantsOption -> {
-                    assert descendantsOption.depth == 2}}) >> [dataNode1, dataNode1]
+                assert descendantsOption.depth == expectedDepth}}) >> [dataNode1, dataNode1]
         when: 'query data nodes API is invoked'
             def response =
                 mvc.perform(
                         get(dataNodeEndpointV2)
                                 .param('cps-path', cpsPath)
-                                .param('descendants', '2'))
+                                .param('descendants', includeDescendantsOptionString))
                         .andReturn().response
         then: 'the response contains the the datanode in json format'
             assert response.status == HttpStatus.OK.value()
             assert response.getContentAsString().contains('{"xpath":{"leaf":"value","leafList":["leaveListElement1","leaveListElement2"]}}')
+       where: 'the following options for include descendants are provided in the request'
+           scenario          | includeDescendantsOptionString || expectedDepth
+           'direct children' | 'direct'                       || 1
+           'descendants'     | '2'                            || 2
     }
 
     def 'Query data node by cps path for the given dataspace across all anchors with #scenario.'() {
@@ -139,5 +144,6 @@ class QueryRestControllerSpec extends Specification {
             'no descendants by default' | ''                             || OMIT_DESCENDANTS
             'no descendant explicitly'  | 'none'                         || OMIT_DESCENDANTS
             'descendants'               | 'all'                          || INCLUDE_ALL_DESCENDANTS
+            'direct children'           | 'direct'                       || DIRECT_CHILD_ONLY
     }
 }