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--
-- Copyright (C) 2008, AdaCore
--
with AUnit.Assertions; use AUnit.Assertions;
with Ada.Exceptions;
with Operands.Ints; use Operands.Ints;
package body Stack.Test is
---------------
-- Tear_Down --
---------------
procedure Tear_Down (T : in out Test) is
pragma Unreferenced (T);
begin
-- Make sure the stack is empty after each test.
while Stack.The_Stack_Index > 0 loop
Free (Stack.The_Stack (Stack.The_Stack_Index));
The_Stack_Index := The_Stack_Index - 1;
end loop;
end Tear_Down;
---------------
-- Test_Push --
---------------
procedure Test_Push (T : in out Test) is
pragma Unreferenced (T);
I1, I2 : Int;
begin
I1.Set (3);
I2.Set (-4);
-- Test single push
Stack.Push (I1);
Assert (Stack.The_Stack_Index = 1, "Wrong stack index after push");
Assert (Stack.The_Stack (1).all = Operand'Class (I1),
"Wrong value pushed on the stack");
-- Test second push
Stack.Push (I2);
Assert (Stack.The_Stack_Index = 2, "Wrong stack index after 2nd push");
Assert (Stack.The_Stack (1).all = Operand'Class (I1)
and then Stack.The_Stack (2).all = Operand'Class (I2),
"Wrong value order after two pushes on the stack");
-- Test overflow
begin
for J in The_Stack_Index .. The_Stack'Last loop
Stack.Push (I2);
end loop;
Assert (False, "Stack_Overflow should have been raised");
exception
when Stack.Stack_Overflow =>
null;
when E : others =>
Assert (False, "Wrong exception raised : " &
Ada.Exceptions.Exception_Name (E));
end;
end Test_Push;
--------------
-- Test_Pop --
--------------
procedure Test_Pop (T : in out Test) is
pragma Unreferenced (T);
I1, I2 : Int;
I3 : Int;
pragma Unreferenced (I3);
begin
I1.Set (3);
I2.Set (-4);
The_Stack (1) := new Operand'Class'(Operand'Class (I1));
The_Stack (2) := new Operand'Class'(Operand'Class (I2));
The_Stack_Index := 2;
Assert (Stack.Pop = Operand'Class (I2),
"Wrong value poped with 2 values on the stack");
Assert (The_Stack_Index = 1,
"Wrong stack index after pop");
Assert (Stack.Pop = Operand'Class (I1),
"Wrong value poped with 1 value on the stack");
Assert (The_Stack_Index = 0,
"Wrong stack index after 2nd pop");
begin
I3 := Int (Stack.Pop);
Assert (False, "Stack_Empty should have been raised");
exception
when Stack.Stack_Empty =>
-- Expected exception
null;
when E : others =>
Assert (False, "Wrong exception raised : " &
Ada.Exceptions.Exception_Name (E));
end;
end Test_Pop;
-----------------
-- Test_Length --
-----------------
procedure Test_Length (T : in out Test) is
pragma Unreferenced (T);
I1, I2 : Int;
I3 : Int;
pragma Unreferenced (I3);
begin
I1.Set (3);
I2.Set (-4);
Stack.Push (I1);
Assert (Stack.Length = 1, "Wrong length after 1 push");
Stack.Push (I2);
Assert (Stack.Length = 2, "Wrong length after 2 push");
I3 := Int (Stack.Pop);
Assert (Stack.Length = 1, "Wrong length after 2 pushes and 1 pop");
begin
for J in 1 .. Stack.The_Stack'Last loop
Stack.Push (I2);
end loop;
exception
when Stack_Overflow =>
Assert (Stack.Length = Natural (Stack.The_Stack'Last),
"Stack.Length incorrect after Stack_Overflow exception");
end;
begin
for J in 0 .. Stack.The_Stack'Last loop
I3 := Int (Stack.Pop);
end loop;
exception
when Stack_Empty =>
Assert (Stack.Length = 0,
"Stack.Length incorrect after Stack_Empty exception");
end;
end Test_Length;
--------------
-- Test_Top --
--------------
procedure Test_Top (T : in out Test) is
pragma Unreferenced (T);
I1, I2 : Int;
I3 : Int;
pragma Unreferenced (I3);
begin
I1.Set (3);
I2.Set (-4);
Stack.Push (I1);
Assert (Stack.Top = Operand'Class (I1),
"Wrong value returned by Top after 1 push");
Assert (Stack.Length = 1, "Top modified the length");
Stack.Push (I2);
Assert (Stack.Top = Operand'Class (I2),
"Wrong value returned by Top after 2 pushes");
Assert (Stack.Length = 2, "Top modified the length");
I3 := Int (Stack.Pop);
I3 := Int (Stack.Pop);
begin
I3 := Int (Stack.Top);
Assert
(False,
"Top should have raised Emtpy_Stack when the stack is empty");
exception
when Stack.Stack_Empty =>
null;
when E : others =>
Assert (False, "Wrong exception raised : " &
Ada.Exceptions.Exception_Name (E));
end;
end Test_Top;
----------------------
-- Test_Next_To_Top --
----------------------
procedure Test_Next_To_Top (T : in out Test) is
pragma Unreferenced (T);
I1, I2 : Int;
I3 : Int;
pragma Unreferenced (I3);
begin
I1.Set (3);
I2.Set (-4);
Stack.Push (I1);
Stack.Push (I2);
Assert (Stack.Next_To_Top = Operand'Class (I1),
"Wrong value returned by Next_To_Top after 2 pushes");
Assert (Stack.Length = 2, "Next_To_Top modified the length");
I3 := Int (Stack.Pop);
begin
I3 := Int (Stack.Next_To_Top);
Assert
(False,
"Top should have raised Emtpy_Stack when the stack's length is 1");
exception
when Stack.Stack_Empty =>
null;
when E : others =>
Assert (False, "Wrong exception raised : " &
Ada.Exceptions.Exception_Name (E));
end;
end Test_Next_To_Top;
end Stack.Test;
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