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-- C390A022.AM

--

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--     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

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--                                    DISCLAIMER

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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED

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--*

--

-- OBJECTIVE:

--      Check that a nonprivate tagged type declared in a package specification

--      may be extended with a record extension in a different package

--      specification, and that this record extension may in turn be extended

--      by a private extension in a third package.

--

--      Check that each derivative inherits the user-defined primitive

--      subprograms of its parent (including those that its parent inherited),

--      that it may override these inherited primitive subprograms, and that it

--      may also declare its own primitive subprograms.

--

--      Check that predefined equality operators are defined for the tagged

--      type and its derivatives.

--

--      Check that type conversion is defined from a type extension to its

--      parent, and that this parent itself may be a type extension.

--

-- TEST DESCRIPTION:

--      Declare a root tagged type and two associated primitive subprograms

--      in a package specification (foundation code).

--

--      Extend the root type with a record extension in a different package

--      specification. Declare a new primitive subprogram for the extension,

--      and override one of the two inherited subprograms. Within the

--      overriding subprogram, utilize type conversion to call the parent's

--      implementation of the same subprogram. Also within the overriding

--      subprogram, call the new primitive subprogram and each inherited

--      subprogram.

--

--      Extend the extension with a private extension in a third package

--      specification. Declare a new primitive subprogram for this private

--      extension, and override one of the three inherited subprograms.

--      Within the overriding subprogram, utilize type conversion to call the

--      parent's implementation of the same subprogram. Also within the

--      overriding subprogram, call the new primitive subprogram and each

--      inherited subprogram.

--

--      Also in the third package, declare two operations of the private

--      extension which utilize aggregates and equality operators to verify

--      the correctness of the components.

--

--      In the main program, declare objects of the two extended types.

--      For each object, call the overriding subprogram, and verify the

--      correctness of the components by using aggregates and equality

--      operators, or by checking the components directly, or, for the private

--      extension, by calling the verification operations declared in the

--      third package.

--

-- TEST FILES:

--      This test consists of the following files:

--

--         F390A00.A

--         C390A020.A

--         C390A021.A

--      => C390A022.AM

--

--

-- CHANGE HISTORY:

--      06 Dec 94   SAIC    ACVC 2.0

--      04 Jun 96   SAIC    ACVC 2.1: Modified prologue.

--

--!

with Report;

with F390A00;   -- Basic alert abstraction.

with C390A020;  -- Extended alert abstraction.

with C390A021;  -- Further extended alert abstraction.

use  F390A00;   -- Primitive operations of Alert_Type directly visible.

with Ada.Calendar;

procedure C390A022 is

   use type Ada.Calendar.Time;  -- Equality/inequality ops directly visible.

begin

   Report.Test ("C390A02", "Primitive operation inheritance by type " &

                "extensions: all extensions declared in different " &

                "packages; second extension is private");

   -- The case for type F390A00.Alert_Type is tested in C390A01.

   -- That subtest is not repeated here.

   LOW_ALERT_SUBTEST: ---------------------------------------------------------

      declare

         Low_Alarm : C390A020.Low_Alert_Type;  -- Extension of tagged type.

         use C390A020; -- Primitive operations of extension directly visible.

      begin

         -- Check "=" operator availability. Aggregate with positional

         -- associations:

         if not (Low_Alarm = (Default_Time, Null_Device, 0)) then

            Report.Failed ("Wrong initial values for Low_Alert_Type");

         end if;

         Handle (Low_Alarm);

         -- Check component availability:

         if Low_Alarm.Arrival_Time /= Alert_Time or

            Low_Alarm.Display_On   /= Teletype   or

            Low_Alarm.Level        /= 1

         then

            Report.Failed ("Wrong values for Low_Alert_Type after Handle");

         end if;

      end Low_Alert_Subtest;

   -- Check intermediate display counts:

   if F390A00.Display_Count_For /= (Null_Device => 1,

                                    Teletype    => 1,

                                    Console     => 0,

                                    Big_Screen  => 0)

   then

      Report.Failed ("Wrong display counts after Low_Alert_Type");

   end if;

   MEDIUM_ALERT_SUBTEST: ------------------------------------------------------

      declare

         Medium_Alarm : C390A021.Medium_Alert_Type; -- Priv. ext. of extension.

         use C390A021; -- Primitive operations of extension directly visible.

      begin

         if not C390A021.Initial_Values_Okay (Medium_Alarm) then

            Report.Failed ("Wrong initial values for Medium_Alert_Type");

         end if;

         Handle (Medium_Alarm);

         if C390A021.Bad_Final_Values (Medium_Alarm) then

            Report.Failed ("Wrong values for Medium_Alert_Type after Handle");

         end if;

      end Medium_Alert_Subtest;

   -- Check final display counts:

   if F390A00.Display_Count_For /= (Null_Device => 2,

                                    Teletype    => 2,

                                    Console     => 1,

                                    Big_Screen  => 0)

   then

      Report.Failed ("Wrong display counts after Medium_Alert_Type");

   end if;

   Report.Result;

end C390A022;