Fix unpaged revision query.

We now return all results for an unpaged query.

Closes #3999
Original pull request #4000

Author: mp911de

spring-data-envers/src/main/java/org/springframework/data/envers/repository/support/EnversRevisionRepositoryImpl.java

@@ -186,9 +186,12 @@ public Page<Revision<N, T>> findRevisions(ID id, Pageable pageable) {
 
 		orderMapped.forEach(baseQuery::addOrder);
 
+		if (pageable.isPaged()) {
+			baseQuery.setFirstResult((int) pageable.getOffset()) //
+					.setMaxResults(pageable.getPageSize());
+		}
+
 		List<Object[]> resultList = baseQuery //
-				.setFirstResult((int) pageable.getOffset()) //
-				.setMaxResults(pageable.getPageSize()) //
 				.getResultList();
 
 		Long count = (Long) createBaseQuery(id) //

spring-data-envers/src/test/java/org/springframework/data/envers/repository/support/RepositoryIntegrationTests.java

@@ -15,12 +15,23 @@
  */
 package org.springframework.data.envers.repository.support;
 
+import static org.assertj.core.api.Assertions.*;
+import static org.springframework.data.history.RevisionMetadata.RevisionType.*;
+
+import java.time.Instant;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Optional;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.PageRequest;
+import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Sort;
 import org.springframework.data.envers.Config;
 import org.springframework.data.envers.sample.Country;
@@ -33,21 +44,13 @@
 import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 
-import java.time.Instant;
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.Optional;
-
-import static org.assertj.core.api.Assertions.*;
-import static org.springframework.data.history.RevisionMetadata.RevisionType.*;
-
 /**
  * Integration tests for repositories.
  *
  * @author Oliver Gierke
  * @author Jens Schauder
  * @author Niklas Loechte
+ * @author Mark Paluch
  */
 @ExtendWith(SpringExtension.class)
 @ContextConfiguration(classes = Config.class)
@@ -107,6 +110,40 @@ void testLifeCycle() {
 		});
 	}
 
+	@Test // GH-3999
+	void shouldReturnUnpagedResults() {
+
+		License license = new License();
+		license.name = "Schnitzel";
+
+		licenseRepository.save(license);
+
+		Country de = new Country();
+		de.code = "de";
+		de.name = "Deutschland";
+
+		countryRepository.save(de);
+
+		Country se = new Country();
+		se.code = "se";
+		se.name = "Schweden";
+
+		countryRepository.save(se);
+
+		license.laender = new HashSet<>();
+		license.laender.addAll(Arrays.asList(de, se));
+
+		licenseRepository.save(license);
+
+		de.name = "Daenemark";
+
+		countryRepository.save(de);
+
+		Page<Revision<Integer, License>> revisions = licenseRepository.findRevisions(license.id, Pageable.unpaged());
+
+		assertThat(revisions).hasSize(2);
+	}
+
 	@Test // #1
 	void returnsEmptyLastRevisionForUnrevisionedEntity() {
 		assertThat(countryRepository.findLastChangeRevision(100L)).isEmpty();