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-- CXAA007.A

--

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--

-- OBJECTIVE:

--      Check that the capabilities of Text_IO.Integer_IO perform correctly

--      on files of Append_File mode, for instantiations with integer and

--      user-defined subtypes.

--      Check that the formatting parameters available in the package can

--      be used and modified successfully in the storage and retrieval of

--      data.

--

-- TEST DESCRIPTION:

--      This test simulates a receiving department inventory system.  Data on

--      items received is entered into an inventory database. This information

--      consists of integer entry number, item number, and bar code.

--      One item is placed into the inventory file immediately following file

--      creation, subsequent items are entered following file opening in

--      Append_File mode.  Data items are validated by reading all data from

--      the file and comparing against known values (those used to enter the

--      data originally).

--

--      This test verifies issues of create in Append_File mode, appending to

--      a file previously appended to, opening in Append_File mode, resetting

--      from Append_File mode to In_File mode, as well as a variety of Text_IO

--      and Integer_IO predefined subprograms.

--

-- APPLICABILITY CRITERIA:

--      This test is applicable only to implementations that support text

--      files.

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      25 Feb 97   PWB.CTA Allowed for non-support of some IO operations

--!

with Ada.Text_IO;

with Report;

procedure CXAA007 is

   use Ada;

   Inventory_File     : Text_IO.File_Type;

   Inventory_Filename : constant String :=

                           Report.Legal_File_Name ( Nam => "CXAA007" );

   Incomplete         : exception;

begin

   Report.Test ("CXAA007", "Check that the capabilities of "                 &

                           "Text_IO.Integer_IO operate correctly for files " &

                           "with mode Append_File");

   Test_for_Text_IO_Support:

   begin

      -- An implementation that does not support Text_IO in a particular

      -- environment will raise Use_Error on calls to various

      -- Text_IO operations.  This block statement encloses a call to

      -- Create, which should raise the exception in a non-supportive

      -- environment.  This exception will be handled to produce a

      -- Not_Applicable result.

      Text_IO.Create (File => Inventory_File,

                      Mode => Text_IO.Append_File,

                      Name => Inventory_Filename);

   exception

      when Text_IO.Use_Error | Text_IO.Name_Error =>

         Report.Not_Applicable

            ( "Files not supported - Create with Append_File for Text_IO" );

         raise Incomplete;

   end Test_for_Text_IO_Support;

   Operational_Test_Block:

   declare

      Max_Entries_Per_Order : constant Natural := 4;

      type Bar_Code_Type is range 0 .. 127; -- Values to be stored as base

                                            -- two numbers in file.

      type Item_Type is record

         Entry_Number : Natural        := 0;

         Item_Number  : Integer        := 0;

         Bar_Code     : Bar_Code_Type  := 0;

      end record;

      type Inventory_Type is

        array (1 .. Max_Entries_Per_Order) of Item_Type;

      Inventory_List : Inventory_Type := ((1, 119,  87), -- Items received

                                          (2, 206,  44), -- this order.

                                          (3, -25, 126),

                                          (4, -18, 31));

      Daily_Order        : constant := 1;

      Entry_Field_Width  : constant Natural :=  1;

      Item_Base          : constant Natural := 16;

      Items_Inventoried  : Natural := 1;

      Items_To_Inventory : Natural := 4;

      package Entry_IO    is new Text_IO.Integer_IO (Natural);

      package Item_IO     is new Text_IO.Integer_IO (Integer);

      package Bar_Code_IO is new Text_IO.Integer_IO (Bar_Code_Type);

      -- The following procedure simulates the addition of inventory item

      -- information into a data file.

      procedure Update_Inventory (The_Item : in Item_Type) is

         Spacer : constant String := "   ";

      begin

         -- Enter all the incoming data into the inventory file.

         Entry_IO.Put   (Inventory_File, The_Item.Entry_Number);

         Text_IO.Put    (Inventory_File, Spacer);

         Item_IO.Put    (Inventory_File, The_Item.Item_Number);

         Text_IO.Put    (Inventory_File, Spacer);

         Bar_Code_IO.Put(File  => Inventory_File,

                         Item  => The_Item.Bar_Code,

                         Width => 13,

                         Base  =>  2);

         Text_IO.New_Line(Inventory_File);

      end Update_Inventory;

   begin

      -- This code section simulates a receiving department maintaining a

      -- data file containing information on items that have been ordered

      -- and received.

      --

      -- As new orders are received, the file is opened in Append_File

      -- mode.

      -- Data is taken from the inventory list and entered into the file,

      -- in specific format.

      -- Enter the order into the inventory file.  This is item 1 in

      -- the inventory list.

      -- The data entry process can be repeated numerous times as required.

      Entry_IO.Put     (Inventory_File,

                        Inventory_List(Daily_Order).Entry_Number);

      Item_IO.Put      (Inventory_File,

                        Inventory_List(Daily_Order).Item_Number);

      Bar_Code_IO.Put  (File  => Inventory_File,

                        Item  => Inventory_List(Daily_Order).Bar_Code);

      Text_IO.New_Line (Inventory_File);

      Text_IO.Close    (Inventory_File);

      Entry_IO.Default_Width := Entry_Field_Width;  -- Modify the default

                                                    -- width of Entry_IO.

      Item_IO.Default_Base   := Item_Base;          -- Modify the default

                                                    -- number base of

                                                    -- Item_IO

      Text_IO.Open (Inventory_File,

                    Text_IO.Append_File,            -- Open in Append mode.

                    Inventory_Filename);

                                                          -- Enter items

      while (Items_Inventoried < Items_To_Inventory) loop -- 2-4 into the

         Items_Inventoried := Items_Inventoried + 1;     -- inventory file.

         Update_Inventory (The_Item => Inventory_List (Items_Inventoried));

      end loop;

      Test_Verification_Block:                           -- Read and check

      declare                                            -- all the data

         TC_Entry      : Natural;                        -- values that

         TC_Item       : Integer;                        -- have been

         TC_Bar_Code   : Bar_Code_Type;                  -- entered in the

         TC_Item_Count : Natural := 0;                   -- data file.

      begin

         Reset1:

         begin

            Text_IO.Reset (Inventory_File, Text_IO.In_File);  -- Reset for

                                                              -- reading.

         exception

            when Text_IO.Use_Error =>

               Report.Not_Applicable

                  ( "Reset to mode In_File not supported for Text_IO" );

               raise Incomplete;

         end Reset1;

         while not Text_IO.End_Of_File (Inventory_File) loop

            Entry_IO.Get      (Inventory_File, TC_Entry);

            Item_IO.Get       (Inventory_File, TC_Item);

            Bar_Code_IO.Get   (Inventory_File, TC_Bar_Code);

            Text_IO.Skip_Line (Inventory_File);

            TC_Item_Count := TC_Item_Count + 1;

            if (TC_Item     /= Inventory_List(TC_Entry).Item_Number) or

               (TC_Bar_Code /= Inventory_List(TC_Entry).Bar_Code)    then

               Report.Failed ("Error in integer data read from file");

            end if;

         end loop;

         if (TC_Item_Count /= Max_Entries_Per_Order) then

            Report.Failed ("Incorrect number of records read from file");

         end if;

      exception

         when Incomplete =>

            raise;

        when others =>

            Report.Failed ("Error raised during data verification");

      end Test_Verification_Block;

   exception

      when Incomplete =>

         raise;

      when others =>

         Report.Failed ("Exception in Text_IO.Integer_IO processing");

   end Operational_Test_Block;

   Final_Block:

   begin

      -- Delete the external file.

      if Text_IO.Is_Open(Inventory_File) then

         Text_IO.Delete (Inventory_File);

      else

         Text_IO.Open (Inventory_File, Text_IO.In_File, Inventory_Filename);

         Text_IO.Delete (Inventory_File);

      end if;

   exception

      when others =>

         Report.Failed ( "Delete not properly implemented for Text_IO" );

   end Final_Block;

   Report.Result;

exception

   when Incomplete =>

      Report.Result;

   when others     =>

      Report.Failed ( "Unexpected exception" );

      Report.Result;

end CXAA007;