Fix equality bug

Author: CTMBNara

src/main/java/org/prebid/server/auction/externalortb/ProfilesProcessor.java

@@ -151,15 +151,13 @@ private ExtImpPrebid parseImpExt(JsonNode jsonNode) {
 
     private static AllProfilesIds truncate(AllProfilesIds profilesIds, int maxProfiles) {
         final List<String> requestProfiles = profilesIds.request();
-        final int impProfilesLimit = maxProfiles - requestProfiles.size();
+        final int impProfilesLimit = Math.max(0, maxProfiles - requestProfiles.size());
 
-        return impProfilesLimit > 0
-                ? new AllProfilesIds(
-                requestProfiles,
+        return new AllProfilesIds(
+                truncate(requestProfiles, maxProfiles),
                 profilesIds.imps().stream()
                         .map(impProfiles -> truncate(impProfiles, impProfilesLimit))
-                        .toList())
-                : new AllProfilesIds(truncate(requestProfiles, maxProfiles), Collections.emptyList());
+                        .toList());
     }
 
     private static <T> List<T> truncate(List<T> list, int maxSize) {

src/test/java/org/prebid/server/auction/externalortb/ProfilesProcessorTest.java

@@ -191,6 +191,32 @@ public void processShouldLimitRequestProfilesUsingAccountConfig() {
         verify(metrics).updateAccountProfileMetric(eq("accountId"), eq(MetricName.limit_exceeded));
     }
 
+    @Test
+    public void processShouldHandleCorrectlyWhenLimitEqualsRequestProfilesCount() {
+        // given
+        final AuctionContext auctionContext = givenAuctionContext(AccountProfilesConfig.of(2, null), true);
+        final BidRequest bidRequest = withProfiles(
+                givenBidRequest(
+                        identity(),
+                        withProfiles(givenImp(identity())),
+                        withProfiles(givenImp(identity())),
+                        withProfiles(givenImp(identity()))),
+                "rp1", "rp2");
+
+        // when
+        target.process(auctionContext, bidRequest);
+
+        // then
+        assertThat(auctionContext.getDebugWarnings()).isEmpty();
+
+        verify(applicationSettings).getProfiles(
+                eq("accountId"),
+                eq(Set.of("rp1", "rp2")),
+                eq(emptySet()),
+                any());
+        verifyNoInteractions(metrics);
+    }
+
     @Test
     public void processShouldFailAndEmitMetricsWhenDebugDisabledAndFailOnUnknownIsTrue() {
         // given