test(discovery): cover the /discover/search self link in the IT that actually runs

The upstream patch adds discoverSearchSelfLinkKeepsScopeAndConfigurationTest to
DiscoveryRestControllerIT, but that class is @ignore'd at class level on dtq-dev
(since eb40d60, unrelated facet-configuration failures), so the test would
never execute here.

- DiscoveryRestControllerIT: add the upstream test verbatim, at the same spot,
  so the file stays in step with upstream and future rebases stay clean. The
  class-level @ignore is left alone; lifting it is a separate job.
- ClarinDiscoveryRestControllerIT: mirror the same test, in this file's
  continuation-indent style. This is the fork's live copy of the discovery ITs
  and it runs in CI, so this is where the fix is actually verified. The test
  asserts only on $._links.self.href, so it is independent of the fork's
  discovery.xml facet/sort customisations.

Fixes dataquest-dev/dspace-customers#934

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: milanmajchrak

dspace-server-webapp/src/test/java/org/dspace/app/rest/ClarinDiscoveryRestControllerIT.java

@@ -1021,6 +1021,33 @@ public void discoverSearchTest() throws Exception {
                 )));
     }
 
+    @Test
+    public void discoverSearchSelfLinkKeepsScopeAndConfigurationTest() throws Exception {
+        context.turnOffAuthorisationSystem();
+
+        parentCommunity = CommunityBuilder.createCommunity(context)
+                .withName("Parent Community")
+                .build();
+
+        context.restoreAuthSystemState();
+
+        //The self link has to describe the request it answers
+        getClient().perform(get("/api/discover/search")
+                        .param("scope", parentCommunity.getID().toString())
+                        .param("configuration", "personOrOrgunit"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$._links.self.href",
+                        containsString("scope=" + parentCommunity.getID())))
+                .andExpect(jsonPath("$._links.self.href",
+                        containsString("configuration=personOrOrgunit")));
+
+        //And it may not add parameters the request did not have
+        getClient().perform(get("/api/discover/search"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$._links.self.href", not(containsString("scope="))))
+                .andExpect(jsonPath("$._links.self.href", not(containsString("configuration="))));
+    }
+
     @Test
     public void checkSortOrderInPersonOrOrgunitConfigurationTest() throws Exception {
         getClient().perform(get("/api/discover/search")

dspace-server-webapp/src/test/java/org/dspace/app/rest/DiscoveryRestControllerIT.java

@@ -1265,6 +1265,33 @@ public void discoverSearchTest() throws Exception {
                    .andExpect(jsonPath("$.sortOptions", contains(allExpectedSortFields)));
     }
 
+    @Test
+    public void discoverSearchSelfLinkKeepsScopeAndConfigurationTest() throws Exception {
+        context.turnOffAuthorisationSystem();
+
+        parentCommunity = CommunityBuilder.createCommunity(context)
+                                          .withName("Parent Community")
+                                          .build();
+
+        context.restoreAuthSystemState();
+
+        //The self link has to describe the request it answers
+        getClient().perform(get("/api/discover/search")
+                   .param("scope", parentCommunity.getID().toString())
+                   .param("configuration", "personOrOrgunit"))
+                   .andExpect(status().isOk())
+                   .andExpect(jsonPath("$._links.self.href",
+                                       containsString("scope=" + parentCommunity.getID())))
+                   .andExpect(jsonPath("$._links.self.href",
+                                       containsString("configuration=personOrOrgunit")));
+
+        //And it may not add parameters the request did not have
+        getClient().perform(get("/api/discover/search"))
+                   .andExpect(status().isOk())
+                   .andExpect(jsonPath("$._links.self.href", not(containsString("scope="))))
+                   .andExpect(jsonPath("$._links.self.href", not(containsString("configuration="))));
+    }
+
     @Test
     public void checkSortOrderInPersonOrOrgunitConfigurationTest() throws Exception {
         getClient().perform(get("/api/discover/search")