BATCH-760: added tests for SqlPagingQueryUtils

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/database/support/SqlPagingQueryUtilsTests.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright 2006-2008 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.batch.item.database.support;
+
+import org.junit.Test;
+import org.junit.Assert;
+
+import java.util.List;
+import java.util.ArrayList;
+
+/**
+ * @author Thomas Risberg
+ * @since 2.0
+ */
+public class SqlPagingQueryUtilsTests {
+
+	@Test
+	public void testGenerateLimitSqlQuery() {
+		AbstractSqlPagingQueryProvider qp = new TestSqlPagingQueryProvider("FOO", "BAR", "ID");
+		Assert.assertEquals("SELECT FOO FROM BAR ORDER BY ID ASC LIMIT 100", SqlPagingQueryUtils.generateLimitSqlQuery(
+				qp, false, "LIMIT 100"));
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE ID > ? ORDER BY ID ASC LIMIT 100", SqlPagingQueryUtils.generateLimitSqlQuery(
+				qp, true, "LIMIT 100"));
+		qp.setWhereClause("BAZ IS NOT NULL");
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE BAZ IS NOT NULL ORDER BY ID ASC LIMIT 100", SqlPagingQueryUtils.generateLimitSqlQuery(
+				qp, false, "LIMIT 100"));
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE BAZ IS NOT NULL AND ID > ? ORDER BY ID ASC LIMIT 100", SqlPagingQueryUtils.generateLimitSqlQuery(
+				qp, true, "LIMIT 100"));
+	}
+
+	@Test
+	public void testGenerateTopSqlQuery() {
+		AbstractSqlPagingQueryProvider qp = new TestSqlPagingQueryProvider("FOO", "BAR", "ID");
+		Assert.assertEquals("SELECT TOP 100 FOO FROM BAR ORDER BY ID ASC", SqlPagingQueryUtils.generateTopSqlQuery(
+				qp, false, "TOP 100"));
+		Assert.assertEquals("SELECT TOP 100 FOO FROM BAR WHERE ID > ? ORDER BY ID ASC", SqlPagingQueryUtils.generateTopSqlQuery(
+				qp, true, "TOP 100"));
+		qp.setWhereClause("BAZ IS NOT NULL");
+		Assert.assertEquals("SELECT TOP 100 FOO FROM BAR WHERE BAZ IS NOT NULL ORDER BY ID ASC", SqlPagingQueryUtils.generateTopSqlQuery(
+				qp, false, "TOP 100"));
+		Assert.assertEquals("SELECT TOP 100 FOO FROM BAR WHERE BAZ IS NOT NULL AND ID > ? ORDER BY ID ASC", SqlPagingQueryUtils.generateTopSqlQuery(
+				qp, true, "TOP 100"));
+	}
+
+	@Test
+	public void testGenerateRowNumSqlQuery() {
+		AbstractSqlPagingQueryProvider qp = new TestSqlPagingQueryProvider("FOO", "BAR", "ID");
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE ROWNUMBER <= 100 ORDER BY ID ASC", SqlPagingQueryUtils.generateRowNumSqlQuery(
+				qp, false, "ROWNUMBER <= 100"));
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE ID > ? AND ROWNUMBER <= 100 ORDER BY ID ASC", SqlPagingQueryUtils.generateRowNumSqlQuery(
+				qp, true, "ROWNUMBER <= 100"));
+		qp.setWhereClause("BAZ IS NOT NULL");
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE BAZ IS NOT NULL AND ROWNUMBER <= 100 ORDER BY ID ASC", SqlPagingQueryUtils.generateRowNumSqlQuery(
+				qp, false, "ROWNUMBER <= 100"));
+		Assert.assertEquals("SELECT FOO FROM BAR WHERE BAZ IS NOT NULL AND ID > ? AND ROWNUMBER <= 100 ORDER BY ID ASC", SqlPagingQueryUtils.generateRowNumSqlQuery(
+				qp, true, "ROWNUMBER <= 100"));
+	}
+
+	@Test
+	public void testGenerateLimitJumpToQuery() {
+		AbstractSqlPagingQueryProvider qp = new TestSqlPagingQueryProvider("FOO", "BAR", "ID");
+		Assert.assertEquals("SELECT ID AS SORT_KEY FROM BAR ORDER BY ID ASC LIMIT 100, 1", SqlPagingQueryUtils.generateLimitJumpToQuery(
+				qp, "LIMIT 100, 1"));
+		qp.setWhereClause("BAZ IS NOT NULL");
+		Assert.assertEquals("SELECT ID AS SORT_KEY FROM BAR WHERE BAZ IS NOT NULL ORDER BY ID ASC LIMIT 100, 1", SqlPagingQueryUtils.generateLimitJumpToQuery(
+				qp, "LIMIT 100, 1"));
+	}
+
+	@Test
+	public void testGenerateTopJumpToQuery() {
+		AbstractSqlPagingQueryProvider qp = new TestSqlPagingQueryProvider("FOO", "BAR", "ID");
+		Assert.assertEquals("SELECT TOP 100, 1 ID AS SORT_KEY FROM BAR ORDER BY ID ASC", SqlPagingQueryUtils.generateTopJumpToQuery(
+				qp, "TOP 100, 1"));
+		qp.setWhereClause("BAZ IS NOT NULL");
+		Assert.assertEquals("SELECT TOP 100, 1 ID AS SORT_KEY FROM BAR WHERE BAZ IS NOT NULL ORDER BY ID ASC", SqlPagingQueryUtils.generateTopJumpToQuery(
+				qp, "TOP 100, 1"));
+	}
+
+
+	private static class TestSqlPagingQueryProvider extends AbstractSqlPagingQueryProvider {
+
+		public TestSqlPagingQueryProvider(String select, String from, String sortKey) {
+			setSelectClause(select);
+			setFromClause(from);
+			setSortKey(sortKey);
+		}
+
+		public String generateFirstPageQuery(int pageSize) {
+			return null;
+		}
+
+		public String generateRemainingPagesQuery(int pageSize) {
+			return null;
+		}
+
+		public String generateJumpToItemQuery(int itemIndex, int pageSize) {
+			return null;
+		}
+
+	}
+
+}