Polish "Improve test coverage of RdbmsOperation"

See gh-28472

spring-jdbc/src/test/java/org/springframework/jdbc/object/RdbmsOperationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2022 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.
@@ -31,7 +31,6 @@
 import org.springframework.jdbc.core.SqlParameter;
 import org.springframework.jdbc.datasource.DriverManagerDataSource;
 
-import static java.util.Map.entry;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 
@@ -51,14 +50,6 @@ public void emptySql() {
 				operation::compile);
 	}
 
-	@Test
-	public void getSql() {
-		String sql = "select * from mytable";
-		operation.setDataSource(new DriverManagerDataSource());
-		operation.setSql(sql);
-		String strGotten = operation.getSql();
-		assertThat(strGotten.equals(sql));
-	}
 	@Test
 	public void setTypeAfterCompile() {
 		operation.setDataSource(new DriverManagerDataSource());
@@ -87,38 +78,39 @@ public void tooFewParameters() {
 
 	@Test
 	public void tooFewMapParameters() {
+		operation.setDataSource(new DriverManagerDataSource());
 		operation.setSql("select * from mytable");
 		operation.setTypes(new int[] { Types.INTEGER });
 		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
 				operation.validateNamedParameters((Map<String, String>) null));
 	}
 
 	@Test
-	public void operationConfiguredViaJdbcTemplateMustGetDataSource() throws Exception {
+	public void operationConfiguredViaJdbcTemplateMustGetDataSource() {
 		operation.setSql("foo");
 		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
 				operation.compile())
-			.withMessageContaining("ataSource");
+			.withMessageContaining("'dataSource'");
 	}
 
 	@Test
 	public void tooManyParameters() {
+		operation.setDataSource(new DriverManagerDataSource());
 		operation.setSql("select * from mytable");
 		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
 				operation.validateParameters(new Object[] { 1, 2 }));
 	}
 	@Test
 	public void tooManyMapParameters() {
+		operation.setDataSource(new DriverManagerDataSource());
 		operation.setSql("select * from mytable");
 		assertThatExceptionOfType(InvalidDataAccessApiUsageException.class).isThrownBy(() ->
-				operation.validateNamedParameters(Map.ofEntries(
-						entry("a", "b"),
-						entry("c", "d")
-				) ));
+				operation.validateNamedParameters(Map.of("a", "b", "c", "d")));
 	}
 
 	@Test
 	public void unspecifiedMapParameters() {
+		operation.setDataSource(new DriverManagerDataSource());
 		operation.setSql("select * from mytable");
 		Map<String, String> params = new HashMap<>();
 		params.put("col1", "value");