1 files changed, 42 insertions, 0 deletions
diff --git a/icebox/tc_logic_xpr.py b/icebox/tc_logic_xpr.py
new file mode 100644
index 0000000..e557caf
--- /dev/null
+++ b/icebox/tc_logic_xpr.py
@@ -0,0 +1,42 @@
+# Test case for `icebox_asc2hlc' and `icebox_hlc2asc': Does conversion
+#   from LUT strings to logic expressions and back work correctly?
+# Copyright (C) 2017 Roland Lutz
+#
+# This program 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 3 of
+# the License, or (at your option) any later version.
+#
+# This program 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.
+
+import sys
+import icebox
+from icebox_asc2hlc import lut_to_logic_expression
+from icebox_hlc2asc import logic_expression_to_lut
+
+def main():
+    sys.stderr.write("testing conversion from LUT strings "
+                     "to logic expressions and back")
+
+    for i in range(65536):
+        if i % 4096 == 0:
+            sys.stderr.write(".")
+            sys.stderr.flush()
+
+        lut = bin(i)[2:].zfill(16)
+        s = lut_to_logic_expression(lut, ('a', 'b', 'c', 'd'))
+        l = logic_expression_to_lut(s, ('a', 'b', 'c', 'd'))
+
+        if l != lut:
+            sys.stderr.write("\nERROR at LUT  = %s\n" % lut)
+            sys.stderr.write("stringified   = %s\n" % s)
+            sys.stderr.write("resulting LUT = %s\n" % l)
+            sys.exit(1)
+
+    sys.stderr.write("\n")
+
+if __name__ == '__main__':
+    main()