DATAKV-137 - Fix cached query execution.

We now make sure that cached SpelCriteria's use the appropriate EvaluationContext containing parameters from the request instead of using the EvaluationContext of the cached query.

Original Pull Request: #20

src/test/java/org/springframework/data/keyvalue/repository/query/CachingKeyValuePartTreeQueryUnitTests.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2016 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.keyvalue.repository.query;
+
+import static org.hamcrest.core.IsNot.*;
+import static org.hamcrest.core.IsSame.*;
+import static org.junit.Assert.*;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.*;
+
+import java.lang.reflect.Method;
+import java.util.List;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.springframework.data.keyvalue.Person;
+import org.springframework.data.keyvalue.core.KeyValueOperations;
+import org.springframework.data.keyvalue.core.SpelCriteria;
+import org.springframework.data.projection.ProjectionFactory;
+import org.springframework.data.repository.core.RepositoryMetadata;
+import org.springframework.data.repository.query.DefaultEvaluationContextProvider;
+import org.springframework.data.repository.query.QueryMethod;
+
+/**
+ * Unit tests for {@link CachingKeyValuePartTreeQuery}.
+ * 
+ * @author Mark Paluch
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class CachingKeyValuePartTreeQueryUnitTests {
+
+	@Mock KeyValueOperations kvOpsMock;
+	@Mock RepositoryMetadata metadataMock;
+	@Mock ProjectionFactory projectionFactoryMock;
+
+	@Before
+	public void setUp() throws Exception {
+
+		when(metadataMock.getDomainType()).thenReturn((Class) Person.class);
+		when(metadataMock.getReturnedDomainClass(any(Method.class))).thenReturn((Class) Person.class);
+	}
+
+	/**
+	 * @see DATAKV-137
+	 */
+	@Test
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	public void cachedSpelExpressionShouldBeReusedWithNewContext() throws NoSuchMethodException, SecurityException {
+
+		QueryMethod qm = new QueryMethod(Repo.class.getMethod("findByFirstname", String.class), metadataMock,
+				projectionFactoryMock);
+
+		KeyValuePartTreeQuery query = new CachingKeyValuePartTreeQuery(qm, DefaultEvaluationContextProvider.INSTANCE,
+				kvOpsMock, SpelQueryCreator.class);
+
+		Object[] args = new Object[] { "foo" };
+
+		SpelCriteria first = (SpelCriteria) query.prepareQuery(args).getCritieria();
+		SpelCriteria second = (SpelCriteria) query.prepareQuery(args).getCritieria();
+
+		assertThat(first.getExpression(), sameInstance(second.getExpression()));
+		assertThat(first.getContext(), not(sameInstance(second.getContext())));
+	}
+
+	static interface Repo {
+
+		List<Person> findByFirstname(String firstname);
+	}
+}