1entity foo is
2end foo;
3
4use std.textio.all;
5
6architecture only of foo is
7begin  -- only
8  process
9    variable x : integer := 0;
10  begin  -- process
11    x := 1 + 2;
12    assert x = 3 report "TEST FAILED - x does not equal 1" severity failure;
13    assert x /= 3 report "TEST PASSED" severity NOTE;
14    wait;
15  end process;
16end only;
17