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diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc1907.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc1907.vhd
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+
+-- Copyright (C) 2001 Bill Billowitch.
+
+-- Some of the work to develop this test suite was done with Air Force
+-- support.  The Air Force and Bill Billowitch assume no
+-- responsibilities for this software.
+
+-- This file is part of VESTs (Vhdl tESTs).
+
+-- VESTs is free software; you can redistribute it and/or modify it
+-- under the terms of the GNU General Public License as published by the
+-- Free Software Foundation; either version 2 of the License, or (at
+-- your option) any later version. 
+
+-- VESTs is distributed in the hope that it will be useful, but WITHOUT
+-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+-- FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+-- for more details. 
+
+-- You should have received a copy of the GNU General Public License
+-- along with VESTs; if not, write to the Free Software Foundation,
+-- Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
+
+-- ---------------------------------------------------------------------
+--
+-- $Id: tc1907.vhd,v 1.2 2001-10-26 16:29:43 paw Exp $
+-- $Revision: 1.2 $
+--
+-- ---------------------------------------------------------------------
+
+ENTITY c07s01b00x00p11n01i01907ent IS
+END c07s01b00x00p11n01i01907ent;
+
+ARCHITECTURE c07s01b00x00p11n01i01907arch OF c07s01b00x00p11n01i01907ent IS
+
+BEGIN
+  TESTING: PROCESS
+    -- Local declarations.
+    variable b1a, b2a, b3a, b4a : BOOLEAN;
+    variable b1o, b2o, b3o, b4o : BOOLEAN;
+    variable b1x, b2x, b3x, b4x : BOOLEAN;
+  BEGIN
+    -- Test that the following operators can be used associatively.
+    -- 1. AND.
+    b1a := TRUE;
+    b2a := TRUE;
+    b3a := FALSE;
+    assert (NOT (b1a AND b2a AND b3a))
+      report "AND operator cannot be used associatively.";
+    b4a := TRUE;
+    assert (b1a AND b2a AND b4a)
+      report "AND operator cannot be used associatively.";
+
+    -- 2. OR.
+    b1o := FALSE;
+    b2o := FALSE;
+    b3o := TRUE;
+    assert (b1o OR b2o OR b3o)
+      report "OR operator cannot be used associatively.";
+    b4o := FALSE;
+    assert (NOT (b1o OR b2o OR b4o))
+      report "OR operator cannot be used associatively.";
+    
+    -- 3. XOR.
+    b1x := TRUE;
+    b2x := TRUE;
+    b3x := FALSE;
+    assert (NOT (b1x XOR b2x XOR b3x))
+      report "XOR operator cannot be used associatively.";
+    b4x := TRUE;
+    assert (b1x XOR b2x XOR b4x)
+      report "XOR operator cannot be used associatively.";
+
+    wait for 5 ns;
+
+    assert NOT(    (NOT (b1a AND b2a AND b3a))    and
+                   (b1a AND b2a AND b4a)      and
+                   (b1o OR b2o OR b3o)      and
+                   (NOT (b1o OR b2o OR b4o))   and
+                   (NOT (b1x XOR b2x XOR b3x))   and
+                   (b1x XOR b2x XOR b4x)      )
+      report "***PASSED TEST: /src/ch07/sc01/p012/s010101.vhd"
+      severity NOTE;
+    assert (    (NOT (b1a AND b2a AND b3a))    and
+                (b1a AND b2a AND b4a)      and
+                (b1o OR b2o OR b3o)      and
+                (NOT (b1o OR b2o OR b4o))   and
+                (NOT (b1x XOR b2x XOR b3x))   and
+                (b1x XOR b2x XOR b4x)      )
+      report "***FAILED TEST: c07s01b00x00p11n01i01907 - Associative test for and or and xor failed."
+      severity ERROR;
+    wait;
+  END PROCESS TESTING;
+
+END c07s01b00x00p11n01i01907arch;