optable-targeting: Fix query string construction when IDs are missing.

Author: softcoder594

extra/modules/optable-targeting/src/main/java/org/prebid/server/hooks/modules/optable/targeting/model/Query.java

@@ -1,7 +1,6 @@
 package org.prebid.server.hooks.modules.optable.targeting.model;
 
 import lombok.Value;
-import org.apache.commons.lang3.StringUtils;
 
 @Value(staticConstructor = "of")
 public class Query {
@@ -11,10 +10,6 @@ public class Query {
     String attributes;
 
     public String toQueryString() {
-        if (StringUtils.isEmpty(ids) && !StringUtils.isEmpty(attributes)) {
-            return attributes.substring(1);
-        }
-
         return ids + attributes;
     }
 }

extra/modules/optable-targeting/src/test/java/org/prebid/server/hooks/modules/optable/targeting/v1/core/QueryBuilderTest.java

@@ -39,6 +39,8 @@ public void shouldBuildFullQueryString() {
         // then
         assertThat(query.getIds()).isEqualTo("&id=e%3Aemail&id=p%3A123");
         assertThat(query.getAttributes()).isEqualTo("&gdpr_consent=tcf&gdpr=1&timeout=100ms");
+        assertThat(query.toQueryString())
+                .isEqualTo("&id=e%3Aemail&id=p%3A123&gdpr_consent=tcf&gdpr=1&timeout=100ms");
     }
 
     @Test
@@ -94,7 +96,7 @@ public void shouldBuildQueryStringWhenIdsListIsEmptyAndIpIsPresent() {
 
         // then
         assertThat(query).isNotNull();
-        assertThat(query.toQueryString()).isEqualTo("gdpr=0");
+        assertThat(query.toQueryString()).isEqualTo("&gdpr=0");
     }
 
     @Test