8 files changed, 74 insertions, 18 deletions
diff --git a/testdata/scad/features/for-tests.scad b/testdata/scad/features/for-tests.scad
index fe36789..10295b1 100644
--- a/testdata/scad/features/for-tests.scad
+++ b/testdata/scad/features/for-tests.scad
@@ -22,10 +22,10 @@ for(r=[1:2:6]) translate([r*10-30,30,0]) difference() {cylinder(r=r, center=true
 for(r=[1.5:0.2:2.5]) translate([r*10-30,30,0]) cube([1, 4*r, 2], center=true);
 
 // Negative range, negative step
-for(r=[5:-1:1]) translate([r*10-60,40,0]) cylinder(r=r);
+for(r=[5:-1:1]) translate([r*10-30,50,0]) cylinder(r=r);
 
-// Negative range, positive step
-for(r=[5:1:1]) translate([r*10-30,40,0]) cylinder(r=r);
+// Negative range, positive step (using backward compatible auto swap of begin and end)
+for(r=[5:1]) translate([r*10-30,40,0]) cylinder(r=r);
 
 // Zero step
 
diff --git a/testdata/scad/features/polygon-tests.scad b/testdata/scad/features/polygon-tests.scad
index b4e92b6..0cd259f 100644
--- a/testdata/scad/features/polygon-tests.scad
+++ b/testdata/scad/features/polygon-tests.scad
@@ -15,4 +15,10 @@ translate([-2,0,0]) polygon(points);
 translate([-2,-2,0]) polygon(points=points, paths=[[0,1,2,3], [4,5,6,7]]);
 translate([2,-4,0]) polygon([[0,0], [1,0], [1,1], [0,0]]);
 
+// With hole
+translate([-2,-4,0])
+  polygon(points=[[0,0], [1,0], [1,1], [0,1], [0.2,0.2], [0.8,0.2], [0.8,0.8], [0.2,0.8]],
+          paths=[[0,1,2,3],[4,5,6,7]]
+);
+
 // FIXME: convexity
diff --git a/testdata/scad/features/projection-cut-tests.scad b/testdata/scad/features/projection-cut-tests.scad
new file mode 100644
index 0000000..0409a3e
--- /dev/null
+++ b/testdata/scad/features/projection-cut-tests.scad
@@ -0,0 +1,15 @@
+// 2D child
+projection(cut=true) { square(); }
+
+projection(cut=true) translate([20,0,0]) cube(10, center=true);
+
+// Boundary case: clipping the top of a cube
+translate([0,20,0]) projection(cut=true) translate([0,0,-4.999999]) cube(10, center=true);
+
+// holes
+translate([0,-10,0]) projection(cut=true) {
+  union() {
+      difference() { cube(5,center=true); cube(4,center=true); }
+      translate([2.1,2.1]) difference() { cube(5,center=true); cube(4,center=true); }
+  }
+}
diff --git a/testdata/scad/features/projection-extrude-tests.scad b/testdata/scad/features/projection-extrude-tests.scad
new file mode 100644
index 0000000..d9c216c
--- /dev/null
+++ b/testdata/scad/features/projection-extrude-tests.scad
@@ -0,0 +1,3 @@
+// Linear extrude
+translate([22,0,0]) linear_extrude(height=20) projection(cut=true) translate([0,0,9]) sphere(r=10);
+translate([44,0,0]) linear_extrude(height=20) projection(cut=true) translate([0,0,7]) sphere(r=10);
diff --git a/testdata/scad/features/projection-tests.scad b/testdata/scad/features/projection-tests.scad
index e6c52ea..27d03fe 100644
--- a/testdata/scad/features/projection-tests.scad
+++ b/testdata/scad/features/projection-tests.scad
@@ -3,18 +3,25 @@ projection();
 // No children
 projection() { }
 // 2D child
-projection(cut=true) { square(); }
+projection() { square(); }
 
-linear_extrude(height=20) projection(cut=false) sphere(r=10);
-translate([22,0,0]) linear_extrude(height=20) projection(cut=true) translate([0,0,9]) sphere(r=10);
-translate([44,0,0]) linear_extrude(height=20) projection(cut=true) translate([0,0,7]) sphere(r=10);
+// Simple
+projection(cut=false) cube(10);
 
-// Boundary case: clipping the top of a cube
-translate([0,-22,0]) linear_extrude(height=5) projection(cut=true) translate([0,0,-4.999999]) cube(10, center=true);
+// Two children
+translate([-12,0]) projection(cut=false) {
+    cube(10);
+    difference() {
+      sphere(10);
+      cylinder(h=30, r=5, center=true);
+    }
+}
 
-// holes
-translate([0,-44,0]) linear_extrude(height=5) projection(cut=true) 
-	union() {
-		difference() { cube(5,center=true); cube(4,center=true); }
-		translate([2.1,2.1]) difference() { cube(5,center=true); cube(4,center=true); }
-	}
+// Holes
+translate([6,-12]) projection(cut=false) {
+    cube(10);
+    difference() {
+      sphere(10);
+      cylinder(h=30, r=5, center=true);
+    }
+}
diff --git a/testdata/scad/features/render-2d-tests.scad b/testdata/scad/features/render-2d-tests.scad
index 683ffe4..f8df115 100644
--- a/testdata/scad/features/render-2d-tests.scad
+++ b/testdata/scad/features/render-2d-tests.scad
@@ -1,6 +1,11 @@
 render() {
   difference() {
-    square(100, center=true);
-    circle(r=30);
+    square(10, center=true);
+    circle(r=3);
   }
 }
+
+translate([12,0,0]) render() {
+  square(10, center=true);
+  circle(r=3);
+}
diff --git a/testdata/scad/misc/children-tests.scad b/testdata/scad/misc/children-tests.scad
index a9a3cf9..1c3d9ea 100644
--- a/testdata/scad/misc/children-tests.scad
+++ b/testdata/scad/misc/children-tests.scad
@@ -53,7 +53,7 @@ module test_children_range() {
 	children([0:4]); // all
 	children([1:2]); // child2, child3
 	children([0:2:4]); // child1, child3, child5
-	children([4:-1:0]); // out, out
+	children([0:-1:4]); // out, out
 	echo("Children range: end");
 }
 test_children_range() {
diff --git a/testdata/scad/misc/range-tests.scad b/testdata/scad/misc/range-tests.scad
new file mode 100644
index 0000000..42ef2a4
--- /dev/null
+++ b/testdata/scad/misc/range-tests.scad
@@ -0,0 +1,20 @@
+echo("[a01] ----- [1:4]");      for (a = [1:4])      echo ("[a01] ", a);
+echo("[a02] ----- [4:1]");      for (a = [4:1])      echo ("[a02] ", a);
+echo("[a03] ----- [0:0]");      for (a = [0:0])      echo ("[a03] ", a);
+echo("[a04] ----- [0:3]");      for (a = [0:3])      echo ("[a04] ", a);
+echo("[a05] ----- [-3:0]");     for (a = [-3:0])     echo ("[a05] ", a);
+echo("[a06] ----- [0:-3]");     for (a = [0:-3])     echo ("[a06] ", a);
+echo("[a07] ----- [-2:2]");     for (a = [-2:2])     echo ("[a07] ", a);
+echo("[a08] ----- [2:-2]");     for (a = [2:-2])     echo ("[a08] ", a);
+
+echo("[b01] ----- [1:1:5]");    for (a = [1:1:5])    echo ("[b01] ", a);
+echo("[b02] ----- [1:2:5]");    for (a = [1:2:5])    echo ("[b02] ", a);
+echo("[b03] ----- [1:-1:5]");   for (a = [1:-1:5])   echo ("[b03] ", a);
+echo("[b04] ----- [5:1:1]");    for (a = [5:1:1])    echo ("[b04] ", a);
+echo("[b05] ----- [5:2:1]");    for (a = [5:2:1])    echo ("[b05] ", a);
+echo("[b06] ----- [5:-1:1]");   for (a = [5:-1:1])   echo ("[b06] ", a);
+echo("[b07] ----- [0:0:0]");    for (a = [0:0:0])    echo ("[b07] ", a);
+echo("[b08] ----- [1:0:1]");    for (a = [1:0:1])    echo ("[b08] ", a);
+echo("[b09] ----- [1:0:5]");    for (a = [1:0:5])    echo ("[b09] ", a);
+echo("[b10] ----- [0:1:0]");    for (a = [0:1:0])    echo ("[b10] ", a);
+echo("[b11] ----- [3:-.5:-3]"); for (a = [3:-.5:-3]) echo ("[b11] ", a);