Fix SpEL withRootObject test

The test case is intended to be for the method 'withRootObject()', but
actually it's copied from the previous test method that does not use
'withRootObject()'.

This commit fixes the propertyReadWriteWithRootObject() test method in
PropertyAccessTests.

Closes gh-27905

Author: justlikeliuen

spring-expression/src/test/java/org/springframework/expression/spel/PropertyAccessTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 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.
@@ -232,17 +232,17 @@ public void propertyReadWriteWithRootObject() {
 		assertThat(context.getRootObject().getValue()).isSameAs(target);
 
 		Expression expr = parser.parseExpression("name");
-		assertThat(expr.getValue(context, target)).isEqualTo("p1");
+		assertThat(expr.getValue(context)).isEqualTo("p1");
 		target.setName("p2");
-		assertThat(expr.getValue(context, target)).isEqualTo("p2");
+		assertThat(expr.getValue(context)).isEqualTo("p2");
 
 		parser.parseExpression("name='p3'").getValue(context, target);
 		assertThat(target.getName()).isEqualTo("p3");
-		assertThat(expr.getValue(context, target)).isEqualTo("p3");
+		assertThat(expr.getValue(context)).isEqualTo("p3");
 
-		expr.setValue(context, target, "p4");
+		expr.setValue(context, "p4");
 		assertThat(target.getName()).isEqualTo("p4");
-		assertThat(expr.getValue(context, target)).isEqualTo("p4");
+		assertThat(expr.getValue(context)).isEqualTo("p4");
 	}
 
 	@Test