When testing a custom controller for a Visualforce wizard, you need to: (A) Test navigation between pages by calling controller methods that return PageReference objects and verifying the URL; (B) Set URL parameters that the controller expects using ApexPages.currentPage().getParameters().put(); and (E) Set the current page context in the test using Test.setCurrentPage() to establish the proper testing environment for Visualforce controllers.

C. "insert pageret;" is syntactically incorrect and PageReference objects are not DML-capable.

D. This shows a constructor for an extension controller, not relevant for testing a custom controller.

3. References:

1. Salesforce Developer Guide - Testing Custom Controllers: "Unit Testing Visualforce Controllers" section, specifically pages on Test.setCurrentPage() usage

2. Apex Developer Guide - "Testing Visualforce Controllers and Extensions" chapter, sections on PageReference testing

3. Salesforce Documentation - "ApexPages Methods" reference, getParameters() method documentation

4. Trailhead Module - "Visualforce Controllers" unit on testing controllers with URL parameters

5. Salesforce Developer Documentation - "Test Class Methods" reference, Test.setCurrentPage() method specification

1. Apex Developer Guide, “Testing Controllers”, Example 2 – setting page context, Summer ’24, p. 423.

2. Visualforce Developer Guide, “Testing Custom Controllers and Extensions”, § Passing Parameters, p. 209.

3. Apex Developer Guide, “PageReference Class”, § getUrl(), p. 501.