1：定义一个辅助类。

 CLASS ltd_crms4_techobj_srch_helper DEFINITION FOR TESTING
   DURATION SHORT
      INHERITING FROM cl_crms4_techobj_search_helper  RISK LEVEL HARMLESS
 .
   PUBLIC SECTION.
     TYPES:
       BEGIN OF ltys_field_range,
         fieldname TYPE crmt_fieldname,
         range     TYPE crms4t_range,
       END OF ltys_field_range,
       ltyt_field_range TYPE TABLE OF ltys_field_range.
     DATA mt_field_range TYPE ltyt_field_range .

 ENDCLASS.

2： 向辅助类中的属性插入值

     TEST-INJECTION instance_techobj_srch_helper.
       data lo_ltd_helper TYPE REF TO ltd_crms4_techobj_srch_helper.
       create OBJECT lo_ltd_helper.
       lo_ltd_helper->mt_field_range = VALUE #( ( fieldname = 'RANGE1' range = VALUE #( ( sign = 'I' option = 'CP' low = '*23456789123456789' ) ) )
                               ( fieldname = 'RANGE2' range = VALUE #( ( sign = 'I' option = 'EQ' low = 'X' ) ) ) ).
       lo_search_helper = lo_ltd_helper.
     END-TEST-INJECTION.

因为 lo_search_helper 这时时指向父类的，其属性为私有，因此先创建辅助类实例，给属性赋值，再赋给lo_search_helper

3： 在第一个test injection 中定义过辅助类变量后，其它test-injection 可以直接拿来用。

     TEST-INJECTION instance_techobj_srch_helper.
*       data lo_ltd_helper TYPE REF TO ltd_crms4_techobj_srch_helper.
       create OBJECT lo_ltd_helper.
       lo_ltd_helper->mt_field_range = VALUE #( ( fieldname = 'RANGE1' range = VALUE #( ( sign = 'I' option = 'CP' low = '*23456789123456789' ) ) )
                               ( fieldname = 'RANGE2' range = VALUE #( ( sign = 'I' option = 'EQ' low = 'X' ) ) ) ).
       lo_search_helper = lo_ltd_helper.
     END-TEST-INJECTION.