I found a very interesting post by Emanuel Klenner, about extraction of an internal table from ABAP debugger to VALUE #( ) statement, that can be used later in the program or unit test. This approach uses debugger scripts.
I am attaching this script here:
*---------------------------------------------------------------------*
* CLASS lcl_debugger_script DEFINITION
*---------------------------------------------------------------------*
*
*---------------------------------------------------------------------*
CLASS lcl_debugger_script DEFINITION INHERITING FROM cl_tpda_script_class_super .
PUBLIC SECTION.
DATA gv_tabname TYPE tabname.
DATA gv_tab_from TYPE i.
DATA gv_tab_to TYPE i.
DATA gt_content TYPE tpda_scr_table_content_it.
DATA gt_components TYPE tpda_scr_table_comp_it.
DATA gv_all_fields TYPE xfeld.
DATA gv_field_cnt TYPE i.
METHODS prologue REDEFINITION.
METHODS init REDEFINITION.
METHODS script REDEFINITION.
METHODS end REDEFINITION.
METHODS get_table_fields.
METHODS build_val_pound_expression.
ENDCLASS. "lcl_debugger_script DEFINITION
*---------------------------------------------------------------------*
* CLASS lcl_debugger_script IMPLEMENTATION
*---------------------------------------------------------------------*
*
*---------------------------------------------------------------------*
CLASS lcl_debugger_script IMPLEMENTATION.
METHOD prologue.
*** generate abap_source (source handler for ABAP)
super->prologue( ).
ENDMETHOD. "prolog
METHOD init.
DATA lt_sval TYPE STANDARD TABLE OF sval.
DATA lv_answer TYPE c LENGTH 1.
DATA lv_title TYPE string.
DATA ls_popup TYPE ZDEBUGGER_SCRIPTING_S. "Just for the where used list
IMPORT tabname TO gv_tabname FROM MEMORY ID sy-repid.
lv_title = 'Script Control Parameters'(000).
lt_sval = VALUE #( tabname = 'ZDEBUGGER_SCRIPTING_S'
( fieldname = 'ITAB' fieldtext = 'Internal Table Name'(001) value = gv_tabname field_obl = abap_true )
( fieldname = 'ALL_TABLE_FIELDS' fieldtext = 'Use all table fields'(002) value = abap_true )
( fieldname = 'ITAB_FROM' fieldtext = 'From record'(003) value = '1' )
( fieldname = 'ITAB_TO' fieldtext = 'To record'(004) value = '9999' )
).
CALL FUNCTION 'POPUP_GET_VALUES'
EXPORTING
popup_title = lv_title
IMPORTING
returncode = lv_answer
TABLES
fields = lt_sval
EXCEPTIONS
error_in_fields = 1
OTHERS = 2.
IF sy-subrc IS NOT INITIAL.
raise_error( ).
ENDIF.
IF lv_answer = 'A'.
* User canceled
raise_error( ).
ENDIF.
LOOP AT lt_sval INTO DATA(ls_sval).
CASE sy-tabix.
WHEN 1.
gv_tabname = ls_sval-value.
EXPORT tabname FROM gv_tabname TO MEMORY ID sy-repid.
WHEN 2.
gv_all_fields = ls_sval-value.
WHEN 3.
gv_tab_from = ls_sval-value.
WHEN 4.
gv_tab_to = ls_sval-value.
ENDCASE.
ENDLOOP.
ENDMETHOD. "init
METHOD script.
DATA lo_tab TYPE REF TO cl_tpda_script_tabledescr.
DATA lt_val TYPE tpda_scr_table_content_it.
DATA lt_comp TYPE tpda_scr_table_comp_it.
DATA lv_records TYPE i.
TRY.
lo_tab ?= cl_tpda_script_data_descr=>factory( CONV #( gv_tabname ) ).
lv_records = lo_tab->linecnt( ).
IF lv_records < gv_tab_to.
gv_tab_to = lv_records.
ENDIF.
lo_tab->content( EXPORTING p_line_from = gv_tab_from
p_line_to = gv_tab_to
IMPORTING p_it_comp_val = gt_content ).
gt_components = lo_tab->components( ).
get_table_fields( ).
build_val_pound_expression( ).
CATCH cx_root INTO DATA(lo_root).
RETURN.
ENDTRY.
ENDMETHOD. "script
METHOD get_table_fields.
DATA lt_sval TYPE STANDARD TABLE OF spopli.
DATA lv_answer TYPE c LENGTH 1.
DATA lv_title TYPE string.
gv_field_cnt = lines( gt_components ).
IF gv_all_fields = abap_true.
RETURN.
ENDIF.
lv_title = 'Select Table Fields'(003).
LOOP AT gt_components INTO DATA(ls_comp).
APPEND VALUE #( selflag = abap_true varoption = ls_comp-compname ) TO lt_sval.
ENDLOOP.
CALL FUNCTION 'POPUP_TO_DECIDE_LIST'
EXPORTING
mark_flag = abap_true
mark_max = 100
textline1 = 'Fieldname'(005)
titel = 'Select Table Fields'(006)
IMPORTING
answer = lv_answer
TABLES
t_spopli = lt_sval
EXCEPTIONS
not_enough_answers = 1
too_much_answers = 2
too_much_marks = 3
OTHERS = 4.
IF sy-subrc IS NOT INITIAL.
RETURN.
ENDIF.
IF lv_answer = 'A'.
* User canceled
RETURN.
ENDIF.
CLEAR gv_field_cnt.
LOOP AT lt_sval INTO DATA(ls_sval).
IF ls_sval-selflag IS INITIAL.
READ TABLE gt_components INDEX sy-tabix ASSIGNING FIELD-SYMBOL(<ls_comp>).
CHECK sy-subrc IS INITIAL.
CLEAR <ls_comp>-compname.
ELSE.
ADD 1 TO gv_field_cnt.
ENDIF.
ENDLOOP.
ENDMETHOD.
METHOD build_val_pound_expression.
DATA lv_max_fields_per_line TYPE n LENGTH 2 VALUE '10'.
DATA lv_max_field_length TYPE i.
DATA BEGIN OF ls_value.
DATA record TYPE c LENGTH 255.
DATA END OF ls_value.
DATA lt_value LIKE STANDARD TABLE OF ls_value.
LOOP AT gt_components INTO DATA(ls_comp).
DATA(lv_length) = strlen( ls_comp-compname ).
IF lv_length > lv_max_field_length.
lv_max_field_length = lv_length.
ENDIF.
ENDLOOP.
APPEND VALUE #( record = |{ gv_tabname CASE = LOWER } = VALUE #( | ) TO lt_value.
LOOP AT gt_content ASSIGNING FIELD-SYMBOL(<ls_tabrecord>).
IF gv_field_cnt > lv_max_fields_per_line.
APPEND VALUE #( record = '(' ) TO lt_value.
ELSE.
ls_value-record = '( '.
ENDIF.
LOOP AT <ls_tabrecord>-fields INTO DATA(lv_field).
READ TABLE gt_components INDEX sy-tabix INTO ls_comp.
CHECK sy-subrc IS INITIAL AND ls_comp-compname IS NOT INITIAL.
CASE ls_comp-typid.
WHEN 'D' OR 'T'.
CHECK lv_field CN '0 '.
WHEN 'I' OR 'N' OR 'P'.
CHECK lv_field CN '0., '.
WHEN 'C'.
CHECK lv_field <> space.
ENDCASE.
IF gv_field_cnt > lv_max_fields_per_line.
IF ls_comp-compname <> 'MANDT'.
ls_value-record = | { ls_comp-compname WIDTH = lv_max_field_length } = '{ lv_field }' |.
ELSE.
ls_value-record = | { ls_comp-compname WIDTH = lv_max_field_length } = sy-mandt |.
ENDIF.
APPEND ls_value TO lt_value.
ELSE.
IF ls_comp-compname <> 'MANDT'.
ls_value-record &&= | { ls_comp-compname } = '{ lv_field }' |.
ELSE.
ls_value-record &&= | { ls_comp-compname } = sy-mandt |.
ENDIF.
ENDIF.
ENDLOOP.
IF gv_field_cnt <= lv_max_fields_per_line
AND ls_value IS NOT INITIAL.
ls_value-record &&= ' )'.
APPEND ls_value TO lt_value.
ELSE.
APPEND VALUE #( record = ')' ) TO lt_value.
ENDIF.
CLEAR ls_value.
ENDLOOP.
APPEND VALUE #( record = |).| ) TO lt_value.
EDITOR-CALL FOR lt_value.
ENDMETHOD.
METHOD end.
*** insert your code which shall be executed at the end of the scripting (before trace is saved)
*** here
ENDMETHOD. "end
ENDCLASS. "lcl_debugger_script IMPLEMENTATION
There is another script by Alexander Laible that serves the same purpose, which can be found on Github.
Another approach is to use a solution using Enhancement framework, as pointed by Sandra Rossi.