add tests

tests/__main__.py

@@ -0,0 +1,56 @@
+import sys
+import os
+
+import math
+import progress.bar
+import glob
+
+# allow import from parent directory
+sys.path.append(os.path.dirname(sys.path[0]))
+
+import gds
+
+global bar
+
+def callback(parser):
+    global bar
+
+    bar.max = parser.total
+    bar.index = parser.current
+    bar.update()
+
+for arg in glob.glob("{}/tests/*.gds".format(sys.path[0])):
+    f = open(arg, "rb")
+    try:
+        bar = progress.bar.IncrementalBar("parsing file")
+        lib = gds.parse_file(f, progress_func=callback)
+        print()
+
+        print("file version: {}".format(lib.version))
+        print("last access: {}".format(lib.last_access.isoformat()))
+        print("last modification: {}".format(lib.last_mod.isoformat()))
+        print("m/unit : {}".format(lib.meters_per_unit))
+        print("unit/dbunit : {}".format(lib.units_per_dbunit))
+
+        print("library name : {}".format(lib.name))
+        print("contains a total of {} structure(s)".format(len(lib.structures)))
+
+        for name in lib.structures.keys():
+            #print(name, end = " ")
+            print("- {}".format(name))
+            for elem in lib.structures[name].elements:
+                if isinstance(elem, gds.Boundary):
+                    for coord in elem.points:
+                        coord = (coord[0] * lib.units_per_dbunit , coord[1] * lib.units_per_dbunit)
+        
+        print("linking structure references")
+        lib.link_all_refs(callback)
+
+    except gds.ParserError as e:
+        print("parser error: {}".format(e))
+    except KeyboardInterrupt:
+        continue
+    finally:
+        f.close()
+
+print("all done")