DATACMNS-525 - Introduce infrastructure for KeyValue repositories.

Added basic infrastructure for repositories on top of key-value data stores. For more details see the original pull request.

Original pull request: #95.

src/test/java/org/springframework/data/querydsl/QueryDslUtilsUnitTests.java

@@ -0,0 +1,120 @@
+/*
+ * Copyright 2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.querydsl;
+
+import static org.hamcrest.collection.IsArrayWithSize.*;
+import static org.junit.Assert.*;
+
+import org.hamcrest.collection.IsArrayContainingInOrder;
+import org.junit.Before;
+import org.junit.Test;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.domain.Sort.Direction;
+import org.springframework.data.domain.Sort.NullHandling;
+import org.springframework.data.keyvalue.Person;
+import org.springframework.data.keyvalue.QPerson;
+
+import com.mysema.query.types.EntityPath;
+import com.mysema.query.types.OrderSpecifier;
+import com.mysema.query.types.path.PathBuilder;
+
+/**
+ * @author Christoph Strobl
+ */
+public class QueryDslUtilsUnitTests {
+
+	private EntityPath<Person> path;
+	private PathBuilder<Person> builder;
+
+	@Before
+	public void setUp() {
+
+		this.path = SimpleEntityPathResolver.INSTANCE.createPath(Person.class);
+		this.builder = new PathBuilder<Person>(path.getType(), path.getMetadata());
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void toOrderSpecifierThrowsExceptioOnNullPathBuilder() {
+		QueryDslUtils.toOrderSpecifier(new Sort("firstname"), null);
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test
+	public void toOrderSpecifierReturnsEmptyArrayWhenSortIsNull() {
+		assertThat(QueryDslUtils.toOrderSpecifier(null, builder), arrayWithSize(0));
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test
+	public void toOrderSpecifierConvertsSimpleAscSortCorrectly() {
+
+		Sort sort = new Sort(Direction.ASC, "firstname");
+
+		OrderSpecifier<?>[] specifiers = QueryDslUtils.toOrderSpecifier(sort, builder);
+
+		assertThat(specifiers, IsArrayContainingInOrder.<OrderSpecifier<?>> arrayContaining(QPerson.person.firstname.asc()));
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test
+	public void toOrderSpecifierConvertsSimpleDescSortCorrectly() {
+
+		Sort sort = new Sort(Direction.DESC, "firstname");
+
+		OrderSpecifier<?>[] specifiers = QueryDslUtils.toOrderSpecifier(sort, builder);
+
+		assertThat(specifiers,
+				IsArrayContainingInOrder.<OrderSpecifier<?>> arrayContaining(QPerson.person.firstname.desc()));
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test
+	public void toOrderSpecifierConvertsSortCorrectlyAndRetainsArgumentOrder() {
+
+		Sort sort = new Sort(Direction.DESC, "firstname").and(new Sort(Direction.ASC, "age"));
+
+		OrderSpecifier<?>[] specifiers = QueryDslUtils.toOrderSpecifier(sort, builder);
+
+		assertThat(specifiers, IsArrayContainingInOrder.<OrderSpecifier<?>> arrayContaining(
+				QPerson.person.firstname.desc(), QPerson.person.age.asc()));
+	}
+
+	/**
+	 * @see DATACMNS-525
+	 */
+	@Test
+	public void toOrderSpecifierConvertsSortWithNullHandlingCorrectly() {
+
+		Sort sort = new Sort(new Sort.Order(Direction.DESC, "firstname", NullHandling.NULLS_LAST));
+
+		OrderSpecifier<?>[] specifiers = QueryDslUtils.toOrderSpecifier(sort, builder);
+
+		assertThat(specifiers,
+				IsArrayContainingInOrder.<OrderSpecifier<?>> arrayContaining(QPerson.person.firstname.desc().nullsLast()));
+	}
+
+}