DATAMONGO-1078 - Polishing.

Polished test cases. Simplified equals(…)/hashCode() for sample entity and its identifier type.

Original pull request: #239.

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/ComplexIdRepositoryIntegrationTests.java

@@ -15,14 +15,13 @@
  */
 package org.springframework.data.mongodb.repository;
 
-import static org.hamcrest.collection.IsCollectionWithSize.*;
-import static org.hamcrest.collection.IsIterableContainingInOrder.*;
-import static org.hamcrest.core.IsEqual.*;
+import static org.hamcrest.Matchers.*;
 import static org.junit.Assert.*;
 
 import java.util.Collections;
 import java.util.List;
 
+import org.hamcrest.Matchers;
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -39,6 +38,7 @@ import com.mongodb.MongoClient;
 
 /**
  * @author Christoph Strobl
+ * @author Oliver Gierke
  */
 @RunWith(SpringJUnit4ClassRunner.class)
 @ContextConfiguration
@@ -61,14 +61,14 @@ public class ComplexIdRepositoryIntegrationTests {
 	}
 
 	@Autowired UserWithComplexIdRepository repo;
-
 	@Autowired MongoTemplate template;
 
-	private MyId id;
-	private UserWithComplexId userWithId;
+	MyId id;
+	UserWithComplexId userWithId;
 
 	@Before
 	public void setUp() {
+
 		repo.deleteAll();
 
 		id = new MyId();
@@ -88,9 +88,7 @@ public class ComplexIdRepositoryIntegrationTests {
 
 		repo.save(userWithId);
 
-		UserWithComplexId loaded = repo.getUserByComplexId(id);
-
-		assertThat(loaded, equalTo(userWithId));
+		assertThat(repo.getUserByComplexId(id), is(userWithId));
 	}
 
 	/**
@@ -115,9 +113,7 @@ public class ComplexIdRepositoryIntegrationTests {
 
 		repo.save(userWithId);
 
-		UserWithComplexId loaded = repo.findOne(id);
-
-		assertThat(loaded, equalTo(userWithId));
+		assertThat(repo.findOne(id), is(userWithId));
 	}
 
 	/**
@@ -128,10 +124,9 @@ public class ComplexIdRepositoryIntegrationTests {
 
 		repo.save(userWithId);
 
-		List<UserWithComplexId> loaded = (List<UserWithComplexId>) repo.findAll(Collections.singleton(id));
+		Iterable<UserWithComplexId> loaded = repo.findAll(Collections.singleton(id));
 
-		assertThat(loaded, hasSize(1));
+		assertThat(loaded, is(Matchers.<UserWithComplexId> iterableWithSize(1)));
 		assertThat(loaded, contains(userWithId));
 	}
-
 }

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/MyId.java

@@ -17,50 +17,43 @@ package org.springframework.data.mongodb.repository;
 
 import java.io.Serializable;
 
+import org.springframework.util.ObjectUtils;
+
 /**
  * @author Christoph Strobl
+ * @author Oliver Gierke
  */
 public class MyId implements Serializable {
 
+	private static final long serialVersionUID = -7129201311241750831L;
+
 	String val1;
 	String val2;
 
 	@Override
 	public int hashCode() {
-		final int prime = 31;
-		int result = 1;
-		result = prime * result + ((val1 == null) ? 0 : val1.hashCode());
-		result = prime * result + ((val2 == null) ? 0 : val2.hashCode());
+
+		int result = 31;
+
+		result += 17 * ObjectUtils.nullSafeHashCode(val1);
+		result += 17 * ObjectUtils.nullSafeHashCode(val2);
+
 		return result;
 	}
 
 	@Override
 	public boolean equals(Object obj) {
-		if (this == obj) {
+
+		if (obj == this) {
 			return true;
 		}
-		if (obj == null) {
-			return false;
-		}
+
 		if (!(obj instanceof MyId)) {
 			return false;
 		}
-		MyId other = (MyId) obj;
-		if (val1 == null) {
-			if (other.val1 != null) {
-				return false;
-			}
-		} else if (!val1.equals(other.val1)) {
-			return false;
-		}
-		if (val2 == null) {
-			if (other.val2 != null) {
-				return false;
-			}
-		} else if (!val2.equals(other.val2)) {
-			return false;
-		}
-		return true;
-	}
 
+		MyId that = (MyId) obj;
+
+		return ObjectUtils.nullSafeEquals(this.val1, that.val1) && ObjectUtils.nullSafeEquals(this.val2, that.val2);
+	}
 }

spring-data-mongodb/src/test/java/org/springframework/data/mongodb/repository/UserWithComplexId.java

@@ -17,9 +17,11 @@ package org.springframework.data.mongodb.repository;
 
 import org.springframework.data.annotation.Id;
 import org.springframework.data.mongodb.core.mapping.Document;
+import org.springframework.util.ObjectUtils;
 
 /**
  * @author Christoph Strobl
+ * @author Oliver Gierke
  */
 @Document
 public class UserWithComplexId {
@@ -29,40 +31,27 @@ public class UserWithComplexId {
 
 	@Override
 	public int hashCode() {
-		final int prime = 31;
-		int result = 1;
-		result = prime * result + ((firstname == null) ? 0 : firstname.hashCode());
-		result = prime * result + ((id == null) ? 0 : id.hashCode());
+
+		int result = 31;
+
+		result += 17 * ObjectUtils.nullSafeHashCode(id);
+
 		return result;
 	}
 
 	@Override
 	public boolean equals(Object obj) {
-		if (this == obj) {
+
+		if (obj == this) {
 			return true;
 		}
-		if (obj == null) {
-			return false;
-		}
+
 		if (!(obj instanceof UserWithComplexId)) {
 			return false;
 		}
-		UserWithComplexId other = (UserWithComplexId) obj;
-		if (firstname == null) {
-			if (other.firstname != null) {
-				return false;
-			}
-		} else if (!firstname.equals(other.firstname)) {
-			return false;
-		}
-		if (id == null) {
-			if (other.id != null) {
-				return false;
-			}
-		} else if (!id.equals(other.id)) {
-			return false;
-		}
-		return true;
-	}
 
+		UserWithComplexId that = (UserWithComplexId) obj;
+
+		return ObjectUtils.nullSafeEquals(this.id, that.id);
+	}
 }