From 39bdd38c192c20d2b89427b00240dd5ed550300b Mon Sep 17 00:00:00 2001
From: Chris Hanson <org/chris-hanson/cph>
Date: Sat, 27 Feb 2016 15:10:58 -0800
Subject: [PATCH] Move dragon4 unit tests from comment to tests/ directory.

---
 tests/check.scm                |  1 +
 tests/runtime/test-dragon4.scm | 83 ++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)
 create mode 100644 tests/runtime/test-dragon4.scm

diff --git a/tests/check.scm b/tests/check.scm
index 5a988550b..29118268d 100644
--- a/tests/check.scm
+++ b/tests/check.scm
@@ -43,6 +43,7 @@ USA.
     "microcode/test-lookup"
     "runtime/test-arith"
     ("runtime/test-char-set" (runtime character-set))
+    "runtime/test-dragon4"
     "runtime/test-dynamic-env"
     "runtime/test-division"
     "runtime/test-entity"
diff --git a/tests/runtime/test-dragon4.scm b/tests/runtime/test-dragon4.scm
new file mode 100644
index 000000000..02122edc2
--- /dev/null
+++ b/tests/runtime/test-dragon4.scm
@@ -0,0 +1,83 @@
+#| -*-Scheme-*-
+
+Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
+    1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+    2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
+    Massachusetts Institute of Technology
+
+This file is part of MIT/GNU Scheme.
+
+MIT/GNU Scheme 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.
+
+MIT/GNU Scheme 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 MIT/GNU Scheme; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
+USA.
+
+|#
+
+;;;; Test of Dragon4
+
+(declare (usual-integrations))
+
+(define-test 'dragon4
+  (lambda ()
+    (define (try n settings . expecteds)
+      (let ((got
+	     (parameterize ((param:flonum-unparser-cutoff settings))
+	       (number->string (exact->inexact n)))))
+	(assert-member got expecteds)))
+
+    ;; From the MIT/GNU Scheme Reference Manual:
+    (try (* 4 (atan 1 1))     '(relative 5)              "3.1416")
+    (try (* 4000 (atan 1 1))  '(relative 5)              "3141.6")
+    (try (* 4000 (atan 1 1))  '(relative 5 scientific)   "3.1416e3")
+    (try (* 40000 (atan 1 1)) '(relative 5 scientific)   "3.1416e4")
+    (try (* 40000 (atan 1 1)) '(relative 5 engineering)  "31.416e3")
+    (try (* 4 (atan 1 1))     '(absolute 5)              "3.14159")
+    (try (* 4000 (atan 1 1))  '(absolute 5)              "3141.59265")
+    (try (* 4e10 (atan 1 1))  '(absolute -4)             "31415930000.")
+    (try (* 4e10 (atan 1 1))  '(absolute -4 scientific)  "3.141593e10")
+    (try (* 4e10 (atan 1 1))  '(absolute -4 engineering) "31.41593e9")
+    (try (* 4e10 (atan 1 1))  '(absolute -5)             "31415900000.")
+
+    ;; Harder tests:
+    (try 0.          'normal  "0.")
+    (try 0.0123456   'normal  ".0123456")
+    (try 0.000123456 'normal  ".000123456")
+
+    (try 1/3       '(relative 4) ".3333")
+    (try 2/3       '(relative 4) ".6667")
+
+    (try 12345.67   '(absolute  1 normal) "12345.7")
+    (try 12345.67   '(absolute -4 normal) "10000.")
+    (try 4999.      '(absolute -4 normal) "0.")
+    (try 5001.      '(absolute -4 normal) "10000.")
+
+    (try 12345.67   '(absolute  1 scientific) "1.23457e4")
+    (try 12345.67   '(absolute -4 scientific) "1e4")
+    (try 4999.      '(absolute -4 scientific) "0." "0e4" "0e3")
+    (try 5001.      '(absolute -4 scientific) "1e4")
+
+    (try 12345.67   '(absolute  1 engineering) "12.3457e3")
+    (try 12345.67   '(absolute -4 engineering) "10e3")
+    (try 4999.      '(absolute -4 engineering) "0." "0e3")
+    (try 5001.      '(absolute -4 engineering) "10e3")
+    (try 5001.      '(absolute -5 engineering) "0." "0e3")
+    (try 5001.      '(absolute -6 engineering) "0." "0e3")
+    (try -5001.     '(absolute -6 engineering) "0." "-0e3")
+
+    (try 0.00499   '(absolute  2 normal) "0." ".00") ; "0." would be prefereable
+
+    (try 0.00500   '(absolute  2 normal) ".01") ; (rounds up in binary)
+    (try 0.00501   '(absolute  2 normal) ".01")
+    (try 0.00499   '(absolute -3 normal) "0.")
+    ))
\ No newline at end of file
-- 
2.25.1