| -- CXAA015.A |
| -- |
| -- Grant of Unlimited Rights |
| -- |
| -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, |
| -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained |
| -- unlimited rights in the software and documentation contained herein. |
| -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making |
| -- this public release, the Government intends to confer upon all |
| -- recipients unlimited rights equal to those held by the Government. |
| -- These rights include rights to use, duplicate, release or disclose the |
| -- released technical data and computer software in whole or in part, in |
| -- any manner and for any purpose whatsoever, and to have or permit others |
| -- to do so. |
| -- |
| -- DISCLAIMER |
| -- |
| -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR |
| -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED |
| -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE |
| -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE |
| -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A |
| -- PARTICULAR PURPOSE OF SAID MATERIAL. |
| --* |
| -- |
| -- OBJECTIVE: |
| -- Check that the exception Status_Error is raised when an attempt is |
| -- made to create or open a file in Append_File mode when the file is |
| -- already open. |
| -- Check that the exception Name_Error is raised by procedure Open when |
| -- attempting to open a file in Append_File mode when the name supplied |
| -- as the filename does not correspond to an existing external file. |
| -- |
| -- TEST DESCRIPTION: |
| -- A scenario is created that demonstrates the potential for the |
| -- inappropriate usage of text processing subprograms Create and Open, |
| -- resulting in the raising of Status_Error and Name_Error exceptions. |
| -- A count is kept to ensure that each anticipated exception is in fact |
| -- raised and handled properly. |
| -- |
| -- APPLICABILITY CRITERIA: |
| -- This test is applicable only to implementations that support text |
| -- files. |
| -- |
| -- |
| -- CHANGE HISTORY: |
| -- 06 Dec 94 SAIC ACVC 2.0 |
| -- 28 Feb 97 PWB.CTA Allowed for non-support of some IO operations |
| --! |
| |
| with Ada.Text_IO; |
| with Report; |
| |
| procedure CXAA015 is |
| use Ada; |
| Text_File : Text_IO.File_Type; |
| Text_Filename : constant String := |
| Report.Legal_File_Name ( Nam => "CXAA015" ); |
| Incomplete : exception; |
| |
| begin |
| |
| Report.Test ("CXAA015", "Check that the appropriate exceptions " & |
| "are raised when procedures Create and " & |
| "Open are used to inappropriately operate " & |
| "on files of mode Append_File"); |
| |
| Test_for_Text_IO_Support: |
| begin |
| |
| -- An application creates a text file with mode Append_File. |
| -- Use_Error will be raised if Text_IO operations or external files are not |
| -- supported. |
| |
| Text_IO.Create (Text_File, Text_IO.Append_File, Text_Filename); |
| exception |
| |
| when Text_IO.Use_Error | Text_IO.Name_Error => |
| Report.Not_Applicable |
| ( "Files not supported - Create as Append_File for Text_IO" ); |
| raise Incomplete; |
| |
| end Test_for_Text_IO_Support; |
| |
| |
| -- The application writes some amount of data to the file. |
| |
| for I in 1 .. 5 loop |
| Text_IO.Put_Line (Text_File, "Data entered into the file"); |
| end loop; |
| |
| Operational_Test_Block: |
| declare |
| TC_Number_Of_Forced_Errors : constant Natural := 3; |
| TC_Errors : Natural := 0; |
| begin |
| |
| |
| Test_for_Create: |
| begin |
| |
| -- During the course of its processing, the application may (erroneously) |
| -- attempt to create the same file already in existence in Append_File mode. |
| -- This results in the raising of Status_Error. |
| |
| Text_IO.Create (Text_File, |
| Text_IO.Append_File, |
| Text_Filename); |
| Report.Failed ("Exception not raised by Create"); |
| |
| -- An exception handler present within the application handles the exception |
| -- and processing can continue. |
| |
| exception |
| when Text_IO.Status_Error => |
| TC_Errors := TC_Errors + 1; |
| when others => |
| Report.Failed("Exception in Create processing"); |
| end Test_for_Create; |
| |
| |
| First_Test_For_Open: |
| begin |
| |
| -- Again, during the course of its processing, the application incorrectly |
| -- attempts to Open a file (in Append_File mode) that is already open. |
| |
| Text_IO.Open (Text_File, Text_IO.Append_File, Text_Filename); |
| Report.Failed ("Exception not raised by improper Open - 1"); |
| |
| -- Once again, an exception handler present within the application handles |
| -- the exception and processing continues. |
| |
| exception |
| when Text_IO.Status_Error => |
| TC_Errors := TC_Errors + 1; |
| |
| -- At some point in its processing, the application closes the file that is |
| -- currently open. |
| |
| Text_IO.Close (Text_File); |
| when others => |
| Report.Failed("Exception in Open processing - 1"); |
| end First_Test_For_Open; |
| |
| |
| Open_With_Wrong_Filename: |
| declare |
| TC_Wrong_Filename : constant String := |
| Report.Legal_File_Name(2); |
| begin |
| |
| -- At this point, the application attempts to Open (in Append_File mode) the |
| -- file used in previous processing, but it attempts this Open using a name |
| -- string that does not correspond to any existing external file. |
| -- First make sure the file doesn't exist. (If it did, then the check |
| -- for open in append mode wouldn't work.) |
| |
| Verify_No_File: |
| begin |
| Text_IO.Open (Text_File, |
| Text_IO.In_File, |
| TC_Wrong_Filename); |
| exception |
| when Text_IO.Name_Error => |
| null; |
| when others => |
| Report.Failed ( "Unexpected exception on Open check" ); |
| end Verify_No_File; |
| |
| Delete_No_File: |
| begin |
| if Text_IO.Is_Open (Text_File) then |
| Text_IO.Delete (Text_File); |
| end if; |
| exception |
| when others => |
| Report.Failed ( "Unexpected exception - Delete check" ); |
| end Delete_No_File; |
| |
| Text_IO.Open (Text_File, |
| Text_IO.Append_File, |
| TC_Wrong_Filename); |
| Report.Failed ("Exception not raised by improper Open - 2"); |
| |
| -- An exception handler for the Name_Error, present within the application, |
| -- catches the exception and processing continues. |
| |
| exception |
| when Text_IO.Name_Error => |
| TC_Errors := TC_Errors + 1; |
| when others => |
| Report.Failed("Exception in Open processing - 2"); |
| end Open_With_Wrong_Filename; |
| |
| |
| if (TC_Errors /= TC_Number_Of_Forced_Errors) then |
| Report.Failed ("Incorrect number of exceptions handled"); |
| end if; |
| |
| end Operational_Test_Block; |
| |
| Deletion: |
| begin |
| -- Delete the external file. |
| if Text_IO.Is_Open (Text_File) then |
| Text_IO.Delete (Text_File); |
| else |
| Text_IO.Open (Text_File, Text_IO.In_File, Text_Filename); |
| Text_IO.Delete (Text_File); |
| end if; |
| exception |
| when others => |
| Report.Failed |
| ( "Delete not properly implemented for Text_IO" ); |
| end Deletion; |
| |
| Report.Result; |
| |
| exception |
| when Incomplete => |
| Report.Result; |
| when others => |
| Report.Failed ( "Unexpected exception" ); |
| Report.Result; |
| |
| end CXAA015; |
