Added testing infra using py.test. Catches parse errors already, but stl compiling tests fail

involute_gears.scad

@@ -14,13 +14,21 @@
 //test_gears ();
 
 // Meshing Double Helix:
-//meshing_double_helix ();
+//test_meshing_double_helix ();
+
+module test_meshing_double_helix(){
+    test_meshing_double_helix ();
+}
 
 // Demonstrate the backlash option for Spur gears.
 //test_backlash ();
 
 // Demonstrate how to make meshing bevel gears.
+//test_bevel_gear_pair();
+
+module test_bevel_gear_pair(){
     bevel_gear_pair ();
+}
 
 pi=3.1415926535897932384626433832795;
 

materials.scad

@@ -16,6 +16,7 @@ Steel = [0.65, 0.67, 0.72];
 Stainless = [0.45, 0.43, 0.5];
 Aluminum = [0.77, 0.77, 0.8];
 Brass = [0.88, 0.78, 0.5];
+Transparent = [1, 1, 1, 0.2];
 
 // Example, uncomment to view
 //color_demo();

openscad_utils.py

@@ -1,17 +1,16 @@
-import py, re
+import py, re, os, signal, time
+from subprocess import Popen, PIPE
 
 mod_re = (r"\bmodule\s+(", r")\s*\(\s*")
 func_re = (r"\bfunction\s+(", r")\s*\(")
 
 def extract_mod_names(fpath, name_re=r"\w+"):
     regex = name_re.join(mod_re)
-    print regex
     matcher = re.compile(regex)
     return (m.group(1) for m in matcher.finditer(fpath.read()))
 
 def extract_func_names(fpath, name_re=r"\w+"):
     regex = name_re.join(func_re)
-    print regex
     matcher = re.compile(regex)
     return (m.group(1) for m in matcher.finditer(fpath.read()))
 
@@ -28,3 +27,25 @@ def collect_test_modules():
     return test_files
 
 collect_test_modules()
+
+def call_openscad(path, stlpath, timeout=20):
+    try:
+        proc = Popen(['openscad', '-s', str(stlpath),  str(path)],
+            stdout=PIPE, stderr=PIPE, close_fds=True)
+        calltime = time.time()
+        #print calltime
+        while True:
+            if proc.poll() is not None:
+                break
+            time.sleep(0.1)
+            #print time.time()
+            if time.time() > calltime + timeout:
+                raise Exception("Timeout")
+    finally:
+        try:
+            proc.terminate()
+            proc.kill()
+        except OSError:
+            pass
+
+    return (proc.returncode,) + proc.communicate()

screw.scad

@@ -11,6 +11,11 @@ outside_diameter
 inner_diameter: thickness of the shaft
 */
 
+//Uncomment to see examples
+//test_auger();
+//test_ball_groove();
+//test_ball_groove2();
+//test_ball_screw();
 
 module helix(pitch, length, slices=500){
     rotations = length/pitch;
@@ -26,7 +31,7 @@ module auger(pitch, length, outside_diameter, inner_diameter) {
     }
 }
 
-translate([300, 0, 0]) auger(100, 300);
+module test_auger(){translate([300, 0, 0]) auger(100, 300);}
 
 
 module ball_groove(pitch, length, diameter, ball_radius=10) {
@@ -35,8 +40,7 @@ module ball_groove(pitch, length, diameter, ball_radius=10) {
         circle(r = ball_radius);
 }
 
-translate([0, 300, 0]) ball_groove(100, 300, 10);
-
+module test_ball_groove(){ translate([0, 300, 0]) ball_groove(100, 300, 10);}
 
 module ball_groove2(pitch, length, diameter, ball_radius, slices=200){
     rotations = length/pitch;
@@ -51,9 +55,10 @@ module ball_groove2(pitch, length, diameter, ball_radius, slices=200){
     }
 }
 
-translate([0, 0, 0]) ball_groove2(100, 300, 100, 10);
-
+module test_ball_groove2(){translate([0, 0, 0]) ball_groove2(100, 300, 100, 10);}
 
 module ball_screw(pitch, length, bearing_radius=2) {
 
 }
+
+module test_ball_screw(){}

test_compile.py

@@ -1,14 +1,44 @@
+import py
+
 from openscad_utils import *
 
 def pytest_generate_tests(metafunc):
-    if "mod_name" in metafunc.funcargnames:
-        for fpath, mod_names in collect_test_modules().items():
-            for mod_name in mod_names:
-                metafunc.addcall(funcargs=dict(mod_name=mod_name, mod_file=fpath))
+    if "modpath" in metafunc.funcargnames:
+        if "modname" in metafunc.funcargnames:
+            for fpath, modnames in collect_test_modules().items():
+                for modname in modnames:
+                    metafunc.addcall(funcargs=dict(modname=modname, modpath=fpath))
+        else:
+            dirpath = py.path.local("./")
+            for fpath in dirpath.visit('*.scad'):
+                metafunc.addcall(funcargs=dict(modpath=fpath))
 
 temppath = py.test.ensuretemp('MCAD')
 
-def test_func(mod_name, mod_file, capfd):
-    fpath = temppath.join(mod_file.base_name)
+def test_compile(modname, modpath):
+    tempname = "test_" + modpath.basename + modname
+    fpath = temppath.join(tempname)
+    stlpath = temppath.join(tempname + ".stl")
+    f = fpath.open('w')
+    f.write("""
+//generated testfile
+include <%s>
+
+%s()
+""" % (modpath, modname))
+    f.flush
+    output = call_openscad(path=fpath, stlpath=stlpath)
+    print output
+    assert output[0] is 0
+    assert "warning" or "error" not in output[2].strip().lowercase()
+    assert len(stlpath.readlines()) > 2
+
+def test_compile_default(modpath):
+    tempname = "test_" + modpath.basename
+    stlpath = temppath.join(tempname + ".stl")
+    output = call_openscad(path=modpath, stlpath=stlpath)
+    print output
+    assert output[0] is 0
+    assert "warning" or "error" not in output[2].strip().lowercase()
+
 
-    call_openscad(path=fpath)